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Journal articles on the topic 'Cementless prostheses'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Arias, S. A., J. R. T. Blanco, J. V. Doretto, G. L. T. Vieira, H. P. Oliveira, and C. M. F. Rezende. "Modified cementless total coxofemoral prosthesis: development, implantation and clinical evaluation." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 65, no. 6 (December 2013): 1660–72. http://dx.doi.org/10.1590/s0102-09352013000600012.

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The aim of this study was to modify canine coxofemoral prostheses and the clinical evaluation of the implantation. Fifteen canine hips and femora of cadavers were used in order to study the surface points of modification in prostheses and develop a perforation guide. Femoral stems and acetabular components were perforated and coated with biphasic calcium phosphate layer. Twelve young adult male mongrel dogs were implanted with coxofemoral prostheses. Six were operated upon and implanted with cemented canine modular hip prostheses, establishing the control group. The remaining six were implanted with a novel design of cementless porous tricalcic phosphate-hydroxyapatite coated hip prostheses. Clinical and orthopedic performance, complications, and thigh muscular hypotrophy were assessed up to the 120th post-operatory day. After 120 days, animals with cementless prostheses had similar clinical and orthopedic performance compared to the cemented group despite the increased pain thigh hypotrophy. Animals that underwent cementless hip prosthesis evidenced more pain, compared to animals with cemented hip prosthesis that required longer recuperation time. No luxations, two fractures and two isquiatic neurapraxies were identified in the course of the study. Using both the cemented and the bioactive coated cementless model were suitable to dogs, showing clinical satisfactory results. Osseointegration and biological fixation were observed in the animals with the modified cementless hip prosthesis.

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2

Yang, Xu, Fuqiang Gao, Wei Sun, and Zirong Li. "Clinical Application and Biological Functionalization of Different Surface Coatings in Artificial Joint Prosthesis: A Comprehensive Research Review." Coatings 12, no. 2 (January 21, 2022): 117. http://dx.doi.org/10.3390/coatings12020117.

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With advances in materials science and biology, there have been continuing innovations in the field of artificial joint prostheses. Cementless prostheses have the advantages of long service life, easy revision, and good initial stability and are widely used in artificial joint replacement. Coatings are the key to cementless prostheses and are at the heart of their excellent functionality. This article mainly studies the clinical application of hydroxyapatite (HA) coating, standard porous coating represented by Porocoat coating, and new high-porosity coating represented by Gription coating. The clinical application and biological functionalization of different artificial joint prosthesis surface coatings are clarified, and it provides a reference for the clinical selection and development of different prosthesis surface coating materials.

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3

Herrera, Antonio, Jesús Mateo, Jorge Gil-Albarova, Antonio Lobo-Escolar, Elena Ibarz, Sergio Gabarre, Yolanda Más, and Luis Gracia. "Cementless Hydroxyapatite Coated Hip Prostheses." BioMed Research International 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/386461.

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More than twenty years ago, hydroxyapatite (HA), calcium phosphate ceramics, was introduced as a coating for cementless hip prostheses. The choice of this ceramic is due to its composition being similar to organic apatite bone crystals. This ceramic is biocompatible, bioactive, and osteoconductive. These qualities facilitate the primary stability and osseointegration of implants. Our surgical experience includes the implantation of more than 4,000 cementless hydroxyapatite coated hip prostheses since 1990. The models implanted are coated with HA in the acetabulum and in the metaphyseal area of the stem. The results corresponding to survival and stability of implants were very satisfactory in the long-term. From our experience, HA-coated hip implants are a reliable alternative which can achieve long term survival, provided that certain requirements are met: good design selection, sound choice of bearing surfaces based on patient life expectancy, meticulous surgical technique, and indications based on adequate bone quality.

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4

Perner, K., E. Voth, H. G. Reith, H. G. Willert, D. Emrich, and H. Schicha. "Cementless Implantation of Zweymueller-Endler Total Endoprostheses of the Hip - Clinical, Radiological and Scintigraphic Follow-Up for 2 Years." Nuklearmedizin 25, no. 02 (1986): 55–60. http://dx.doi.org/10.1055/s-0038-1624320.

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Sixty-four patients with cementless Zweymueller-Endler total endoprostheses of the hip underwent follow-up postoperatively for 2 years. In 3 patients loosening or infection occurred. In 61 patients no complications were observed. However, in 74% of these patients increasing activity uptake at the tip of the shaft was found by scintigraphy. This was associated with hypertrophy of the corticalis and/or with a marrow cavity reaction, observed radiologically. The results show that scintigraphic evaluation of cementlessly implanted Zweymueller-Endler endoprostheses of the hip must be interpreted differently compared to isoelastic or to cemented prostheses.

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5

Moran, CG, and IM Pinder. "Osteolysis around cementless porous-coated knee prostheses." Journal of Bone and Joint Surgery. British volume 77-B, no. 4 (July 1995): 667–68. http://dx.doi.org/10.1302/0301-620x.77b4.7677886.

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6

Morrey, B. F. "Cementless Femoral Prostheses Cost More to Implant than Cemented Femoral Prostheses." Yearbook of Orthopedics 2010 (January 2010): 117. http://dx.doi.org/10.1016/s0276-1092(10)79662-0.

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7

Unnanuntana, Aasis, Apostolos Dimitroulias, Michael P. Bolognesi, Katherine L. Hwang, Stuart B. Goodman, and Randall E. Marcus. "Cementless Femoral Prostheses Cost More to Implant than Cemented Femoral Prostheses." Clinical Orthopaedics and Related Research® 467, no. 6 (September 10, 2008): 1546–51. http://dx.doi.org/10.1007/s11999-008-0485-z.

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8

Simões, J. A. O., M. Taylor, A. T. Marques, and G. Jeronimidis. "Preliminary investigation of a novel controlled stiffness proximal femoral prosthesis." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 212, no. 3 (March 1, 1998): 165–75. http://dx.doi.org/10.1243/0954411981533944.

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Previous studies have suggested that a controlled stiffness prosthesis is required to address the conflicting requirements of minimizing stress shielding and micromotion. The design for a controlled stiffness prosthesis is proposed and a preliminary analytical investigation performed to assess its predicted performance before fabrication of a prototype component. The novel prosthesis consisted of a cobalt-chrome core and a flexible composite outer layer. Varying the composite layer thickness allowed the prosthesis stiffness to be controlled. Three variants of the controlled stiffness prosthesis were critically assessed using the finite element method and their predicted performance compared with those of conventional prosthesis designs. The potential for stress shielding was assessed by examining the periosteal strain energy and the potential for migration assessed by examining the endosteal minimum principal cancellous bone stresses. Both the conventional and controlled stiffness implants performed poorly as press-fit prostheses. All the press-fit prostheses generated high cancellous bone stresses, suggesting that excessive migration of these implants would be likely. The controlled stiffness implants performed better than the conventional implants when bonded to the surrounding bone. Although the controlled stiffness implants did not eliminate stress shielding of the calcar, they produced higher strain energies than the conventional designs. The findings of this study are that osseointegrated controlled stiffness implants may perform better than current osseointegrated cementless prostheses and therefore it is worth while progressing to the next stage, of prototyping an implant.

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9

CHONG, DESMOND Y. R., ULRICH N. HANSEN, and ANDREW A. AMIS. "CEMENTLESS MIS MINI-KEEL PROSTHESIS REDUCES INTERFACE MICROMOTION VERSUS STANDARD STEMMED TIBIAL COMPONENTS." Journal of Mechanics in Medicine and Biology 16, no. 05 (August 2016): 1650070. http://dx.doi.org/10.1142/s0219519416500706.

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Fixation strength of the cementless knee prostheses is dependent on the initial stability of the fixation and minimal relative motion across the prosthesis–bone interface. Broad mini-keels have been developed for tibial components to allow minimally invasive knee arthroplasty, but the effect of the change in fixation design is unknown. In this study, bone–prosthesis interface micromotions of the mini-keel tibial components (consisting of two designs; one is stemless and another with a stem extension of 45[Formula: see text]mm) induced by walking and stair climbing were investigated by finite element modeling and compared with standard stemmed design. The prosthesis surface area amenable for bone ingrowth for the mini-keel tibial components (both stemmed and unstemmed) was predicted to be at least 67% larger than the standard stemmed implant, thereby reducing the risk of long-term aseptic loosening. It was also found that while different load patterns may have led to diverse predictions of the magnitude of the interface micromotions and the extent of osseointegration onto the prosthesis, the outcome of design change evaluation in cementless tibial fixations remains unchanged. The mini-keel tibial components were predicted to anchor onto the periprosthetic bone better than the standard stemmed design under all loading conditions investigated.

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10

Zampelis, Vasileios, Gunnar Flivik, and Uldis Kesteris. "No effect of femoral canal jet-lavage on the stability of cementless stems in primary hip arthroplasty: a randomised RSA study with 6 years follow-up." HIP International 30, no. 4 (April 21, 2019): 417–22. http://dx.doi.org/10.1177/1120700019843123.

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Introduction: In contrast to cemented hip prostheses, the effect of washing the bone bed with jet-lavage prior to insertion of cementless stem components in primary hip arthroplasty (THA) is unclear. Jet-lavage potentially decreases the risk of fat embolisation during rasping and stem insertion and might help in avoiding bacterial contamination. An earlier animal study has shown less debris and better-organised trabecular structure of new bone when jet-lavage was used. We hypothesised that the primary stability of cementless femoral stems implanted after jet-lavage of the femoral canal prior to stem insertion would improve with earlier stabilisation, as measured with Radiostereometry (RSA), compared with insertion without prior jet-lavage. Methods: 40 patients with primary osteoarthritis operated on with a cementless titanium grit blasted stem are included in the study. The patients were randomised to either jet-lavage or control without any lavage of the femoral canal prior to insertion of the prosthesis. The stem migration pattern was measured with RSA at 0, 3, 12, 24 and 72 months. Results: At 6 years, 19 patients remained for analysis in the jet-lavage and 18 in the control group. We found no difference in extent or pattern of migration as measured with RSA. Both groups seemed to have stabilised within 3 months after a slight subsidence and retroversion. No stem was revised or considered loose as measured with RSA. Conclusions: Washing the bone bed with jet-lavage prior to insertion of cementless stems does not affect the stability of cementless femoral components. No adverse effects were observed.

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11

Kim, YH, JH Oh, and SH Oh. "Osteolysis around cementless porous-coated anatomic knee prostheses." Journal of Bone and Joint Surgery. British volume 77-B, no. 2 (March 1995): 236–41. http://dx.doi.org/10.1302/0301-620x.77b2.7706337.

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12

Hauschild, Gregor, Jendrik Hardes, Georg Gosheger, Sandra Stoeppeler, Helmut Ahrens, Franziska Blaske, Christoph Wehe, Uwe Karst, and Steffen Höll. "Evaluation of Osseous Integration of PVD-Silver-Coated Hip Prostheses in a Canine Model." BioMed Research International 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/292406.

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Infection associated with biomaterials used for orthopedic prostheses remains a serious complication in orthopedics, especially tumor surgery. Silver-coating of orthopedic (mega)prostheses proved its efficiency in reducing infections but has been limited to surface areas exposed to soft tissues due to concerns of silver inhibiting osseous integration of cementless stems. To close this gap in the bactericidal capacity of silver-coated orthopedic prostheses extension of the silver-coating on surface areas intended for osseous integration seems to be inevitable. Our study reports about a PVD- (physical-vapor-deposition-) silver-coated cementless stem in a canine model for the first time and showed osseous integration of a silver-coated titanium surfacein vivo. Radiological, histological, and biomechanical analysis revealed a stable osseous integration of four of nine stems implanted. Silver trace elemental concentrations in serum did not exceed 1.82 parts per billion (ppb) and can be considered as nontoxic. Changes in liver and kidney functions associated with the silver-coating could be excluded by blood chemistry analysis. This was in accordance with very limited metal displacement from coated surfaces observed by laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) 12 months after implantation. In conclusion our results represent a step towards complete bactericidal silver-coating of orthopedic prostheses.

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13

Wittenberg, Ralf H., Reinhard Steffen, Hennig Windhagen, Petra Bücking, and Andreas Wilcke. "Five-year results of a cementless short-hip-stem prosthesis." Orthopedic Reviews 5, no. 1 (March 19, 2013): 4. http://dx.doi.org/10.4081/or.2013.e4.

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Hip prosthesis stems with a short stem length and proximal fixation geometry support a bone-preserving and muscle-sparing implantation and should also allow for revision surgery with a standard hip stem. We present 250 prospectively documented clinical and radiological results from the Metha Short Hip Stem prosthesis (B. Braun-Aesculap, Tuttlingen, Germany) after an average follow-up of 4.9 years. The average patient age at surgery was 60 years. Indication for total hip replacement was primary osteoarthrosis (OA) (78% of patients), OA based on developmental dyspla- sia of the hip (16%), and other indications (6%). At the last follow-up, the average Harris Hip Score was 97 points. 85% of patients were very satisfied and 14% were satisfied after surgery, whereas 1% were dissatisfied. Pain according to the Visual Analogue Scale improved from 7.4 (min 1.6, max 9.5) pre-operatively to 0.23 (min 0, max 6.6). No joint dislocations occurred when predominantly using 28 mm and 32 mm prosthesis heads. Nine short-stems were revised: three after bacterial infections, two after primary via valsa with penetration of the femoral cortex two and three months after surgery, and three after early aseptic cases of loosening within the first year. A further nine osseously consolidated short-stems had to be replaced due to breakage of the modular titanium cone adapter after an average of 3.1 years (min 1.9, max 4.4). All surgical revisions were performed using primary standard stems. Without taking the material-related adapter failures into account, a five year Kaplan-Meier survival rate of 96.7% (95% confidence interval 93.4-98.3) was determined for the short-stem prostheses. There were no radiological signs of loosening in any of the short-stem prostheses at the last examination. Fine sclerotic lines were detected in Gruen’s AP zones 1 (19%) and 2 (10.5%), individual hypertrophies in zone 3 (3.5%), fine seams in zones 4 (5.5%) and 5 (4%), without pedestal formations in zone 4, clear cancellous bone compressions in zone 6 (97.5%), as well as single fine scleroses (1.5%) and atrophies (2.5%) in zone 7. The mid-term clinical results with periprosthetic bone remodeling and without radiological signs of loosening confirm this metaphyseal short-stem treatment and fixation concept and the possibility of revision surgery using standard hip stems. Long-term results must be further observed on a prospective basis as part of this collective study.

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14

Van Praet, Frank, and Michiel Mulier. "To cement or not to cement acetabular cups in total hip arthroplasty: a systematic review and re-evaluation." SICOT-J 5 (2019): 35. http://dx.doi.org/10.1051/sicotj/2019032.

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Introduction: Total Hip Arthroplasty (THA) in the treatment of primary osteoarthritis of the hip has evolved to a very safe and cost-effective intervention with revision rates below 5% after 10 years. To this day, however, controversy remains on whether or not to cement the acetabular cup. Methods: A comprehensive PubMed search of the English literature for studies published between 2007 and 2018 was performed. Studies comparing the clinical (revision rate, functionality), radiological (wear) or economic (cost) differences between cemented (cemented stem with cemented cup) and hybrid (cemented stem with uncemented cup) prostheses for primary osteoarthritis of the hip were identified as eligible. Results: A total of 1032 studies were identified whereof twelve were included for qualitative synthesis. All studies concerning the risk of revision were based on registry data, covering a total of 365,693 cups. Cemented prostheses had a similar or lower risk of revision compared to hybrid prostheses in every study, but performed slightly worse on functionality and quality of life. While cemented prostheses were the cheapest option, hybrids were the most cost-effective. Discussion: The widespread preference for cementless fixation of the acetabulum cannot be explained by a superior survival of cementless or hybrid models. Irrespective of age, cemented fixation of the acetabulum remains the gold standard to which other techniques should be compared.

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15

Pacoret, Victor, Etienne Kalk, Ludovic Labattut, Guillaume Girardot, Emmanuel Baulot, and Pierre Martz. "Survival rate of cemented versus cementless tibial component in primary total knee arthroplasty over 5 years of follow-up: comparative study of 109 prostheses." SICOT-J 6 (2020): 36. http://dx.doi.org/10.1051/sicotj/2020028.

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Introduction: Knee osteoarthritis is the main indication for primary total knee arthroplasty (TKA). It is now accepted that cementless implantation of the femoral component provides equivalent results to cemented one, however, the optimal fixation method of the tibial component remains controversial. The purpose of this study was to compare the survivorship of cemented versus cementless tibial baseplate in primary total knee arthroplasty. Materials and methods: We carried out a retrospective, monocentric study, including 109 TKA (Zimmer® Natural Knee II ultra-congruent mobile-bearing) implanted between 2004 and 2010 for primary osteoarthritis, comparing 2 groups depending on tibial component fixation method, one cemented (n = 68) and one cementless (n = 41). Clinical (Knee Society Rating System (KSS), Hospital for Special Surgery (HSS) scores, range of motion) and radiodiological outcomes were assessed at last follow-up with a minimal follow-up of 5 years. Results: Mean follow-up were 8.14 [5.31–12.7] and 8.06 [5.22–12.02] years, respectively, in cemented and cementless groups. The tibial component survival rate was 100% [95CI: 91.4–100] in the cementless group and 97.1% [95CI: 89.78–99.42] in the cemented group (2 aseptic loosenings) (p = 0.27). Radiolucent lines were present in 31.7% (n = 13) of the cementless and 44.1% (n = 30) of the cemented baseplates (p = 0.2). The postoperative KSS knee score was higher in the cementless group (99 ± 3 vs. 97 ± 7.5; p = 0.02), but there was no significant difference in KSS function, global KSS and HSS scores. Mean range of flexion was 120 ± 10° in the cementless group and 122.5 ± 15° in the cemented group (p = 0.37). No significant differences were found on the radiographic data or on complications. Conclusion: In this study, the survival rate of the tibial component is not influenced by its fixation method at a mean follow-up of 8 years in osteoarthritis, which confirms the reliability of cementless fixation in primary TKA.

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16

Kim, Young-Hoo, and Vana E. M. Kim. "Cementless porous-coated anatomic medullary locking total hip prostheses." Journal of Arthroplasty 9, no. 3 (June 1994): 243–52. http://dx.doi.org/10.1016/0883-5403(94)90078-7.

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17

Li, Huibin, Fang Chen, Zhe Wang, and Qian Chen. "Comparison of Clinical Efficacy Between Modular Cementless Stem Prostheses and Coated Cementless Long-Stem Prostheses on Bone Defect in Hip Revision Arthroplasty." Medical Science Monitor 22 (February 29, 2016): 670–77. http://dx.doi.org/10.12659/msm.895709.

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18

REGNARD, P. J. "Electra Trapezio Metacarpal Prosthesis: Results of the First 100 Cases." Journal of Hand Surgery 31, no. 6 (December 2006): 621–28. http://dx.doi.org/10.1016/j.jhsb.2006.05.019.

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The Elektra trapeziometacarpal prosthesis is a cementless, unconstrained prosthesis made by Fixano with titanium and chrome–cobalt steel. This paper examines the results of the first 100 prostheses used by the author for one indication only, viz. painful trapeziometacarpal osteoarthritis. The average follow-up period was 54 (range 36–78) months. Studies of pain, mobility and grip and pinch strength were carried out, the results of which were good in 83 cases. Seven dislocations occurred. Five of these were following severe trauma. The commonest complication was a lack of osteointegration of the trapezial part of the prosthesis, which occurred in 15 cases. Sinking into the metacarpal of the distal stem occurred early in the series in two cases. Some others complications were observed: allergy to the metal (one case), fracture after direct trauma of the thumb (one case) and very painful osteoarthritis of the scaphotrapeziotrapezoid joint (one case).

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19

Delfs, G., and V. Hach. "Initial experience with a newly developed cementless hip endoprosthesis." Veterinary and Comparative Orthopaedics and Traumatology 22, no. 02 (2009): 153–58. http://dx.doi.org/10.3415/vcot-08-01-0006.

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SummaryThe HELICA-Endoprosthesis is a newly developed cementless hip prosthesis for dogs. It was implanted in 39 dogs that had severe hip osteoarthritis and a history of hip pain, as well as in one dog that had chronic hip luxation. One dog had a bilateral arthroplasty. The body weight of the patients ranged between 22 and 54 kg and their ages between nine months and 10 years. Both the femoral stem and acetabular component of the prosthesis were screwed into position following bony preparation. Additional fixation was not necessary as the components remain fixed in position until osteointegration is complete. There are currently five sizes of prosthesis available, and the various components such as the stem, cup and head are readily interchangeable. Although it appeared that good osseous anchorage of the prostheses in the bone on the surgery table had been obtained, three patients experienced both stem and cup loosening (one week, three weeks and six months after surgery). In one animal, stem loosening was observed six weeks after surgery, and another dog experienced a cup loosening two weeks postoperatively. Most of the complications were due to technical errors that occurred during the learning phase. Surgical revisions were successful in three out of five animals. In two animals we had to perform a femoral head and neck excision. Two other animals experienced radiographic bone resorption underneath the segmented collar of the femoral prosthesis but did not show any significant clinical signs of lameness. Another dog that showed signs of ischial neuropraxy after surgery, recovered completely within six weeks after surgery. All of the dogs were capable of weight bearing on the operated leg one day after surgery. The main advantage of the HELICA-Endoprosthesis is the relatively easy surgical technique and short surgery time. The initial clinical results in these 40 cases have been very encouraging. The aim of this study was to assess the early clinical results in these 39 dogs. Final evaluation can only be based on the results of gait analysis, long-term follow-up, and post mortem histological analysis.

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20

Tankersley, Sreve, Michael A. Mont, and David S. Hungerford. "Paper #4 Comparison of first and second generation cementless prostheses." Journal of Arthroplasty 11, no. 2 (February 1996): 226. http://dx.doi.org/10.1016/s0883-5403(05)80029-4.

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21

Gebauer, D., H. J. Refior, and M. Haake. "Micromotions in the primary fixation of cementless femoral stem prostheses." Archives of Orthopaedic and Trauma Surgery 108, no. 5 (1989): 300–307. http://dx.doi.org/10.1007/bf00932320.

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22

Epinette, J. A. "Radiographic assessment of cementless hip prostheses: The “ARA” scoring system." European Journal of Orthopaedic Surgery & Traumatology 9, no. 2 (June 1999): 91–94. http://dx.doi.org/10.1007/bf01695736.

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23

NASSER, SAM, PAT A. CAMPBELL, DOUGLAS KILGUS, NIR KOSSOVSKY, and HARLAN C. AMSTUTZ. "Cementless Total Joint Arthroplasty Prostheses With Titanium-Alloy Articular Surfaces." Clinical Orthopaedics and Related Research &NA;, no. 261 (December 1990): 171???185. http://dx.doi.org/10.1097/00003086-199012000-00020.

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24

Kurtinaitis, Jaunius, Narūnas Porvaneckas, Manvylius Kocius, and Rimvaldas Broga. "Pirminis mišraus ir mechaninio tvirtinimo klubo sąnario endoprotezavimas. Vėlyvieji 5–10 metų rezultatai." Lietuvos chirurgija 1, no. 2 (January 1, 2003): 0. http://dx.doi.org/10.15388/lietchirur.2003.2.2428.

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Jaunius Kurtinaitis, Narūnas Porvaneckas, Manvylius Kocius, Rimvaldas BrogaVilniaus universiteto Ortopedijos-traumatologijos ir plastinės chirurgijos klinikaVilniaus greitosios pagalbos universitetinė ligoninėŠiltnamių g. 29, LT-2043 Vilnius.El paštas: narunas.porvaneckas@mf.vu.lt Įvadas / tikslas Dažniausia endoprotezuoto klubo sąnario problema – gūžduobinio komponento intarpo susidėvėjimas arba jo išklibimas. Vieni autoriai pripažįsta cementinio, kiti – mechaninio tvirtinimo metodiką. Abiem atvejais vėlyvieji rezultatai yra panašūs. Kiekviena metodika tam tikru endoprotezuoto sąnario laikotarpiu išryškina jai būdingas problemas. Mūsų darbo tikslas – įvertinti vėlyvuosius mišraus ir mechaninio tvirtinimo klubo sąnario pirminio endoprotezavimo rezultatus po operacijos praėjus 5–10 metų. Ligoniai ir tyrimo metodai 1993–1998 metais VGPUL Ortopedijos, traumatologijos ir plastinės chirurgijos klinikoje buvo operuoti 36 ligoniai, kuriems buvo atliktos 39 pirminės klubo sąnario endoprotezavimo operacijos naudojant Bi-Metric mechaninio ir mišraus tvirtinimo endoprotezus (EP). Į tyrimą įtraukti 27 ligoniai (29 endoprotezai – 18 mechaninio ir 11 mišraus tvirtinimo), 2002–2003 metais atvykę pasitikrinti. Vidutinis pacientų su mechaninio tvirtinimo protezais stebėjimo laikas (mediana) siekė 7 metus, o su mišraus tvirtinimo – 5 metus. Visiems atvykusiems pacientams buvo atliktos ir įvertintos priekinės abiejų klubo sąnarių rentgenogramos, nustatyta klubo sąnario funkcija pagal Harris Hip Score skalę. Rezultatai 2002–2003 m. ištirta 29 (80%) iš 36 ligonių, operuotų 1993–1998 m. Rentgenologinių tyrimų rezultatai parodė, kad aplink mechaninio tvirtinimo komponentus linijinės demarkacijos nėra. Visi komponentai buvo stabilūs. Kaulas įaugo į mechaninio tvirtinimo komponentus 100% atvejų. Įvertintos osteolizinio proceso aplink gūžduobinį ir šlaunikaulinį komponentus ypatybės, polietileninio intarpo susidėvėjimo prognozės veiksniai atsižvelgiant į endoprotezo tipą, ektopinė osifikacijos įtaka vėlyviesiems klubo sąnario funkciniams rezultatams. Išvados Įvertinti pagal HHS skalę mechaninio ar mišraus tvirtinimo endoprotezavimo rezultatai po 5–10 metų yra geri ir labai geri. Lyginant rentgenologinius pokyčius aplink gūžduobinį ir šlaunikaulinį komponentus matyti, kad pokyčiai aplink mechaninio ir cementinio tvirtinimo šlaunikaulinius komponentus yra gerokai mažesni negu aplink gūžduobinius. Statistiškai patikimo skirtumo tarp polietileno intarpo susidėvėjimo ir panaudoto endoprotezo tipo nebuvo. Gūžduobinio ir šlaunikaulinio komponentų osteoliziniai procesai yra besimptomiai. Šie procesai ir 76% atvejų nustatyta ektopinė osifikacija neturi įtakos geriems ir labai geriems vėlyviesiems operuoto klubo sąnario funkciniams rezultatams. Prasminiai žodžiai: pirminis klubo sąnario endoprotezavimas, mechaninio tvirtinimo endoprotezai, mišraus tvirtinimo endoprotezai. Primary hybrid and cementless total hip arthroplasty. 5 to 10 year follow-up results Jaunius Kurtinaitis, Narūnas Porvaneckas, Manvylius Kocius, Rimvaldas Broga Background / objective The major issue of hip arthroplasty is the wearout or loosening of the acetabular component. Some authors prefer cemented and others cementless hip arthroplasty. In both cases the outcome is similiar. Each method in different periods has its own problems. The aim of the study was to evaluate the late outcome of primary cementless and hybrid total hip replacement 5–10 years after operation. Patients and methods There were 36 patients operated on and 39 operations of primary total hip arthroplasty performed using Bi-Metric hybrid and cementless endoprostheses in 1993–1998. The study included 27 patients (29 endoprostheses) who responded to invitation in 2002–2003. Anteroposterior radiographs of the hip joints were performed for the patients and the functional outcome was evaluated using the Harris Hip score scale. Results During 2002–2003 investigation was carried out on 29 (74%) of 36 hip arthroplasties performed in 1993–1998. Analysis of the data showed no radiolucency signs around the cementless fixation components. All of the components were stable. Bone ingrowth into the cementless prosthesis components was observed in 100% of cases. The osteolysis zones around the acetabular and femoral components were related to the wearout of polythene insertion, but it was asymptomatic. There was no reliable difference between polythene insertion wearout and the type of prosthesis. Ectopic ossification was observed in 76% of cases. Conclusions The study based on HHS score revealed good and very good results 5–10 years after operation. They were comparable with the findings in similar studies. Rentgenological features indicated that there were less alterations around the femoral component compared to the acetabular. Osteolysis around the femoral and acetabular components was asymptomatic and ectopic ossification found in 76% of cases did not interfere with the good functional results. Keywords: primary total hip arthroplasty, cementless prostheses, hybrid prostheses

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Learmonth, I. D., E. J. Smith, and J. L. Cunningham. "The pathogenesis of osteolysis in two different cementless hip replacements." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 211, no. 1 (January 1, 1997): 59–63. http://dx.doi.org/10.1243/0954411971534683.

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Wear of ultra-high molecular weight polyethylene has been incriminated in the osteolysis associated with aseptic loosening of hip implants. A variety of different factors can contribute to accelerated patterns of polyethylene wear and subsequent osteolysis. This paper examines the incidence of osteolysis observed in two different well-matched cohorts of cementless total hip arthro-plasties. The patterns of osteolysis observed, which are ascribed to the generation of polyethylene debris, are interpreted with reference to the design of the individual prostheses.

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Lin, K. J., H. W. Wei, and C. K. Cheng. "The evaluation of a new design concept for cementless hip prostheses." Journal of Biomechanics 39 (January 2006): S69. http://dx.doi.org/10.1016/s0021-9290(06)83161-1.

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Engh, Charles A., William J. Culpepper, and Elias Kassapidis. "Revision of Loose Cementless Femoral Prostheses to Larger Porous Coated Components." Clinical Orthopaedics and Related Research 347 (February 1998): 168???178. http://dx.doi.org/10.1097/00003086-199802000-00019.

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Michelson, James D., and Lee H. Riley. "Considerations in the comparison of cemented and cementless total hip prostheses." Journal of Arthroplasty 4, no. 4 (December 1989): 327–34. http://dx.doi.org/10.1016/s0883-5403(89)80034-8.

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SCHNEIDER, ERICH, CHRISTIAN KINAST, J??RG EULENBERGER, DANIEL WYDER, GUNNAR ESKILSSON, and STEPHAN M. PERREN. "A Comparative Study of the Initial Stability of Cementless Hip Prostheses." Clinical Orthopaedics and Related Research &NA;, no. 248 (November 1989): 200???209. http://dx.doi.org/10.1097/00003086-198911000-00032.

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Kowalczyk, Piotr. "Design Optimization of Cementless Femoral Hip Prostheses Using Finite Element Analysis." Journal of Biomechanical Engineering 123, no. 5 (April 17, 2001): 396–402. http://dx.doi.org/10.1115/1.1392311.

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Implant separation from bone tissue, resulting in the necessity for revision surgery, is a serious drawback of cementless total joint replacement. Unnatural stress distribution around the implant is considered the main reason for the failure. Optimization of the implant properties, especially its geometric parameters, is believed to be the right way to improve reliability of joint prosthetics. An efficient numerical model of the femur–implant system is presented in the paper, including the finite element formulation featuring computation of sensitivity gradients, parametric mesh generator, and a gradient-based optimization scheme. Numerical examples show results of shape optimization of an implant for two sets of design parameters and for the initial stability criterion taken as the optimization goal. The optimum shape appears to be relatively long and proximally porous-coated on about half of its length. The method can be flexibly adjusted to various implant types, stress- and displacement-based optimum criteria, and geometric design parameters.

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Messori, Andrea, Sabrina Trippoli, and Claudio Marinai. "Handling the procurement of prostheses for total hip replacement: description of an original value based approach and application to a real-life dataset reported in the UK." BMJ Open 7, no. 12 (December 2017): e018603. http://dx.doi.org/10.1136/bmjopen-2017-018603.

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ObjectivesIn most European countries, innovative medical devices are not managed according to cost–utility methods, the reason being that national agencies do not generally evaluate these products. The objective of our study was to investigate the cost-utility profile of prostheses for hip replacement and to calculate a value-based score to be used in the process of procurement and tendering for these devices.MethodsThe first phase of our study was aimed at retrieving the studies reporting the values of QALYs, direct cost, and net monetary benefit (NMB) from patients undergoing total hip arthroplasty (THA) with different brands of hip prosthesis. The second phase was aimed at calculating, on the basis of the results of cost–utility analysis, a tender score for each device (defined according to standard tendering equations and adapted to a 0–100 scale). This allowed us to determine the ranking of each device in the simulated tender.ResultsWe identified a single study as the source of information for our analysis. Nine device brands (cemented, cementless, or hybrid) were evaluated. The cemented prosthesis Exeter V40/Elite Plus Ogee, the cementless device Taperloc/Exceed, and the hybrid device Exeter V40/Trident had the highest NMB (£152 877, £156 356, and £156 210, respectively) and the best value-based tender score.ConclusionsThe incorporation of value-based criteria in the procurement process can contribute to optimising the value for money for THA devices. According to the approach described herein, the acquisition of these devices does not necessarily converge on the product with the lowest cost; in fact, more costly devices should be preferred when their increased cost is offset by the monetary value of the increased clinical benefit.

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Seelen, Jan, Jon Bruijn, Lucas Kingma, Frans Bernoski, and Johan Bloem. "Radiographic evaluation of developing instability of the Mecron cementless, threaded acetabular prostheses." RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren 163, no. 09 (September 1995): 197–202. http://dx.doi.org/10.1055/s-2007-1015973.

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Neut, D., RJB Dijkstra, JI Thompson, C. Kavanagh, HC van der Mei, and HJ Busscher. "A biodegradable gentamicin-hydroxyapatite-coating for infection prophylaxis in cementless hip prostheses." European Cells and Materials 29 (January 2, 2015): 42–56. http://dx.doi.org/10.22203/ecm.v029a04.

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Pennington, M., R. Grieve, J. S. Sekhon, P. Gregg, N. Black, and J. H. van der Meulen. "Cemented, cementless, and hybrid prostheses for total hip replacement: cost effectiveness analysis." BMJ 346, feb27 1 (February 27, 2013): f1026. http://dx.doi.org/10.1136/bmj.f1026.

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Jayasuriya, Raveen L., and J. Mark Wilkinson. "Pelvic Periprosthetic Bone Mineral Density Measurement Around Cemented vs Cementless Acetabular Prostheses." Journal of Clinical Densitometry 17, no. 1 (January 2014): 116–20. http://dx.doi.org/10.1016/j.jocd.2013.09.005.

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Kunjummen, B. D., C. Love, S. E. Marwin, and C. J. Palestro. "PERIPROSTHETIC UPTAKE PATTERNS AROUND THE FEMORAL COMPONENT OF FAILED CEMENTLESS HIP PROSTHESES." Clinical Nuclear Medicine 30, no. 5 (May 2005): 372. http://dx.doi.org/10.1097/00003072-200505000-00031.

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Wen-ming, Xi, Wang Ai-min, Wu Qi, Liu Chang-Hua, Zhu Jian-fei, and Xia Fang-fang. "An integrated CAD/CAM/robotic milling method for custom cementless femoral prostheses." Medical Engineering & Physics 37, no. 9 (September 2015): 911–15. http://dx.doi.org/10.1016/j.medengphy.2015.06.005.

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Knessl, J., N. Gschwend, H. Scheier, and U. Munzinger. "Comparative study of cemented and cementless hip prostheses in the same patient." Archives of Orthopaedic and Trauma Surgery 108, no. 5 (1989): 276–78. http://dx.doi.org/10.1007/bf00932313.

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CONVERY, F. RICHARD, MARTHA MINTEER-CONVERY, SEAN D. DEVINE, and MARVIN H. MEYERS. "Acetabular Augmentation in Primary and Revision Total Hip Arthroplasty With Cementless Prostheses." Clinical Orthopaedics and Related Research &NA;, no. 252 (March 1990): 167???175. http://dx.doi.org/10.1097/00003086-199003000-00025.

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VARINI, ELENA, MARCO VANDI, LUCA CRISTOFOLINI, ANGELO CAPPELLO, and ALDO TONI. "INTRA-OPERATIVE TESTS ON CEMENTLESS HIP STEM MECHANICAL STABILITY." Journal of Mechanics in Medicine and Biology 06, no. 01 (March 2006): 25–34. http://dx.doi.org/10.1142/s0219519406001728.

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The aim of the present investigation was to develop a new device that enables the stability achieved by a cementless stem to be assessed intra-operatively. The angle of the stem/femur rotation under torsion and the torque are acquired and compared in real time to a pre-set stability threshold inferred from the literature. The device indicates whether the stem is stable or not. A calibration was needed to convert angular into linear shear displacements. For this reason, repeated tests in vitro were made on both cadaveric and composite femurs, chosen so as to host the same kind and size of prostheses, all implanted with different levels of press-fitting. The device was then validated. The overall accuracy, 21%, which takes into account the interfemur variability, was deemed sufficient to assess the stability.

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Pétursson, Þröstur, Kyle Joseph Edmunds, Magnús Kjartan Gíslason, Benedikt Magnússon, Gígja Magnúsdóttir, Grétar Halldórsson, Halldór Jónsson, and Paolo Gargiulo. "Bone Mineral Density and Fracture Risk Assessment to Optimize Prosthesis Selection in Total Hip Replacement." Computational and Mathematical Methods in Medicine 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/162481.

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The variability in patient outcome and propensity for surgical complications in total hip replacement (THR) necessitates the development of a comprehensive, quantitative methodology for prescribing the optimal type of prosthetic stem: cemented or cementless. The objective of the research presented herein was to describe a novel approach to this problem as a first step towards creating a patient-specific, presurgical application for determining the optimal prosthesis procedure. Finite element analysis (FEA) and bone mineral density (BMD) calculations were performed with ten voluntary primary THR patients to estimate the status of their operative femurs before surgery. A compilation model of the press-fitting procedure was generated to define a fracture risk index (FRI) from incurred forces on the periprosthetic femoral head. Comparing these values to patient age, sex, and gender elicited a high degree of variability between patients grouped by implant procedure, reinforcing the notion that age and gender alone are poor indicators for prescribing prosthesis type. Additionally, correlating FRI and BMD measurements indicated that at least two of the ten patients may have received nonideal implants. This investigation highlights the utility of our model as a foundation for presurgical software applications to assist orthopedic surgeons with selecting THR prostheses.

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Lewis, Peter L., Annette W-Dahl, Otto Robertsson, Heather A. Prentice, and Stephen E. Graves. "Impact of patient and prosthesis characteristics on common reasons for total knee replacement revision: a registry study of 36,626 revision cases from Australia, Sweden, and USA." Acta Orthopaedica 93 (July 5, 2022): 623–33. http://dx.doi.org/10.2340/17453674.2022.3512.

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Background and purpose: Total knee replacement (TKR) studies usually analyze all-cause revision when considering relationships with patient and prosthesis factors. We studied how these factors impact different revision diagnoses.Patients and methods: We used data from 2003 to 2019 of TKR for osteoarthritis from the arthroplasty registries of Sweden, Australia, and Kaiser Permanente, USA to study patient and prosthesis characteristics for specific revision diagnoses. There were 1,072,924 primary TKR included and 36,626 were revised. Factors studied included age, sex, prosthesis constraint, fixation method, bearing mobility, polyethylene type, and patellar component use. Revision diagnoses were arthrofibrosis, fracture, infection, instability, loosening, pain, patellar reasons, and wear. Odds ratios (ORs) for revision were estimated and summary effects were calculated using a meta-analytic approach.Results: We found between-registry consistency in 15 factor/reason analyses. Risk factors for revision for arthrofibrosis were age < 65 years (OR 2.0; 95% CI 1.4–2.7) and mobile bearing designs (MB) (OR 1.7; CI 1.1–2.5), for fracture were female sex (OR 3.2; CI 2.2–4.8), age ≥ 65 years (OR 2.8; CI 1.9–4) and posterior stabilized prostheses (PS) (OR 2.1; CI 1.3–3.5), for infection were male sex (OR 1.9; CI 1.7–2.0) and PS (OR 1.5; CI 1.2–1.8), for instability were age < 65 years (OR 1.5; CI 1.3–1.8) and MB (OR 1.5; CI 1.1–2.2), for loosening were PS (OR 1.5; CI 1.4–1.6), MB (OR 2.2; CI 1.6–3.0) and use of ultra-high molecular weight polyethylene (OR 2.3; CI 1.8–2.9), for patellar reasons were not resurfacing the patella (OR 13.6; CI 2.1–87.2) and MB (OR 2.0; CI 1.2–3.3) and for wear was cementless fixation (OR 4.9; CI 4.3–5.5).Interpretation: Patients could be counselled regarding specific age and sex risks. Use of minimally stabilized, fixed bearing, cemented prostheses, and patellar components is encouraged to minimize revision risk.

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Weber, Stephen, and James Ficke. "Cementless Total Ankle Replacement." Foot & Ankle Orthopaedics 3, no. 3 (July 1, 2018): 2473011418S0051. http://dx.doi.org/10.1177/2473011418s00512.

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Category: Ankle Arthritis Introduction/Purpose: Total ankle replacement (TAR) was initially performed with first-generation cemented components. These constructs showed unacceptable revision and complication rates, in part due to the difficulty of obtaining a uniform cement mantle and the unique difficulties with TAR regarding the inability to dislocate the joint for exposure. Early concerns with polymethylmethacrylate (PMMA) in knees led to multiple studies evaluating fixation of total knee components by bone ingrowth using prospective randomized studies, registry data, and radiostereographic analysis. These studies have shown that if micromotion can be kept below 150 micrometers, cementless fixation could be anticipated. Similar benefits were anticipated with TAR, however the literature supporting cementless TAR by contrast appeared sparse. A systematic literature review was conducted to evaluate the literature supporting cementless TAR. Methods: A systematic review of the English language literature regarding cementless fixation in TAR was performed. Pubmed, Embase, Web of Science, and Google Scholar were searched using the terms “total ankle arthroplasty,” “total ankle replacement,” “cement,” “porous ingrowth”, “biologic fixation”, and “cementless” from the inceptions of these search engines until June 2017. To ensure that no relevant studies were missed, the reference sections of all studies selected for final analysis were additionally reviewed. All potentially relevant papers were compiled to determine whether they fit the previously established inclusion criteria. Exclusion criteria included non-English language studies, non-human or laboratory studies, and isolated case reports. The results of this literature review were analyzed using the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA). Results: The available literature was limited to five articles. Kofoed et al. reported TAR using the STAR ankle, and stated that there was no difference. Brigido et al. using digital radiography of the uncemented INBONE implant, showed that migration was only 0.7 mm at one year and 1.0 mm at two years. Fong et al. performed a preliminary study evaluating the possibility of stereo metric analysis of micromotion, but validated the possibility only. Fevang et al. in a registry review noted that: “The failures in early studies usually occurred with cemented implants. In general, uncemented prostheses have been associated with better results than cemented ones.” Takakura et al. noted a 27% success rate with a cemented ceramic TAR versus a 67% success rate without cement Conclusion: In contrast to the robust literature regarding cementless knee and hip arthroplasty, the literature justifying cementless TAR is surprisingly limited. This lack of literature has had significant impact on the performance of TAR in the US, as virtually all TARs are put in “off-label” without cement with additional liability risks imposed by the use of medical devices in this fashion. While prospective randomized studies comparing cemented to cementless third-generation TARs may violate clinical equipoise, other techniques such as stereometric sequential radiographs, comparative registry outcome data, and systematic retrieval data would allow validation of cementless TAR as a viable technique.

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Gosens, T., and E. J. Van Langelaan. "Cementless Mallory Head Ha-Coated Femoral Prosthesis in Primary Total Hip Arthroplasty: Clinical and Radiological Results of a Four to Nine Year Prospective Study." HIP International 12, no. 4 (October 2002): 345–56. http://dx.doi.org/10.1177/112070000201200401.

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We prospectively studied 152 hips in 126 patients with a proximally porous and hydroxyapatite coated double tapered straight femoral prosthesis. The follow-up period was 4.2 to 9.6 years. All but two prostheses showed osseo-integration. The mean Harris hip score (HHS) increased from 40 to 92 points and 97% of the patients had no or only mild pain. Limping and the use of walking aids decreased substantially after the operation. The morphology of positive bone remodelling with either endosteal bone formation or periosteal bone formation was correlated with the stem fit in the medullary canal (p=0.0001). Negative bone remodelling features could not be demonstrated. There was no correlation between the clinical parameters and the radiological phenomena.

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Elmenshawy, Ahmed Fikry, and Khaled Hamed Salem. "Cemented versus cementless bipolar hemiarthroplasty for femoral neck fractures in the elderly." EFORT Open Reviews 6, no. 5 (May 2021): 380–86. http://dx.doi.org/10.1302/2058-5241.6.200057.

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The management of femoral neck fractures remains controversial. Treatment options include a wide variety of internal fixation methods, unipolar or bipolar hemiarthroplasty or total hip replacement. We carried out a systematic review of the available literature to detect differences between cemented and cementless fixation of bipolar prostheses in treating femoral neck fractures in patients aged 60 years or older. Thirteen studies involving a total of 1561 bipolar hemiarthroplasties (770 cemented and 791 uncemented) were identified. Uncemented hemiarthroplasty was associated with significantly lower blood loss (p < 0.0001), shorter operative time (p < 0.0001), less infection (p = 0.03) and lower risk of heterotopic ossification (p = 0.007). On the other hand, patients with cemented hemiarthroplasty suffered significantly less postoperative thigh pain than those with cementless implantation (p < 0.00001). The existing evidence indicates that uncemented bipolar hemiarthroplasty offers shorter operative time, less blood loss, lower local complications and a similar rate of systemic complications and reoperations as compared to cemented implantation. Cite this article: EFORT Open Rev 2021;6:380-386. DOI: 10.1302/2058-5241.6.200057

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Park, Kee Young, and Sung Kwan Hwang. "The Primary Poro-Coated Cementless Total Hip Arthroplasty (AML , PCA and HGP Prostheses)." Journal of the Korean Orthopaedic Association 25, no. 1 (1990): 222. http://dx.doi.org/10.4055/jkoa.1990.25.1.222.

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Aebli, Nikolaus, Jörg Krebs, Daryl Schwenke, Timothy Hii, and Ulrich Wehrli. "Progression of radiolucent lines in cementless twin-bearing low-contact-stress knee prostheses." Journal of Arthroplasty 19, no. 6 (September 2004): 783–89. http://dx.doi.org/10.1016/j.arth.2004.02.030.

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Anis, Hiba K., Deepak Ramanathan, Nipun Sodhi, Alison K. Klika, Nicolas S. Piuzzi, Michael A. Mont, Carlos A. Higuera, and Robert M. Molloy. "Postoperative Infection in Cementless and Cemented Total Knee Arthroplasty: A Propensity Score Matched Analysis." Journal of Knee Surgery 32, no. 11 (February 12, 2019): 1058–62. http://dx.doi.org/10.1055/s-0039-1678678.

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AbstractThe ongoing debate on fixation in total knee arthroplasty (TKA) has become increasingly relevant with its increased use in a younger patient population and the advent of novel cementless prostheses. Recent literature suggests modern cementless implants are comparable to their cemented counterparts in terms of survivorship and functional outcomes. What has not been well-assessed is whether the two modalities differ with respect to infection rates which was the purpose of this study. Specifically, a propensity score matched study population was used to compare: (1) overall infection; (2) prosthetic joint infection (PJI); and (3) surgical site infection (SSI) rates between cementless and cemented TKAs. Using a large institutional database, 3,180 consecutive primary TKAs were identified. Cementless and cemented TKA patients were propensity score matched by age (p = 0.069), sex (p = 0.395), body mass index (BMI; p = 0.308), and Charlson's comorbidity index (CCI) score (p = 0.616) in a 1:1 ratio. Univariate analysis was performed to compare 2-year overall infection rates. Infections were further analyzed separately as PJIs (deep joint infections requiring surgery) and SSIs (skin/superficial wound infections). Multivariate logistic regression was performed to evaluate infection incidences after adjusting for procedure-related factors (i.e., operative time, hospital volume, and surgeon volume). There were no significant differences between the matched cohorts in terms of overall infection rates (3.8 vs. 2.3%, p = 0.722), as well as when PJI (p = 1.000) and SSI (p = 1.000) rates were analyzed separately. Multivariate analysis revealed no significant differences in overall postoperative infection rates (p = 0.285), PJI rates (p = 0.446), or SSI rates (p = 0.453) even after adjusting for procedure-related factors. There is increasing literature investigating various outcomes demonstrating the comparable efficacies of cementless versus cemented TKAs. To the best of the author's knowledge, this was the first matched case-control study to directly compare their post-operative infection rates. The findings from this study show that post-operative infection rates were similar between fixation modalities even after accounting for a range of patient- and procedure-related factors.

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Loupasis, G., S. J. Birtwistle, and I. D. Hyde. "Hydroxyapatite-Coated Threaded Acetabular Prostheses. A Five-Year Follow-Up Radiographic Study." HIP International 7, no. 1 (January 1997): 11–16. http://dx.doi.org/10.1177/112070009700700102.

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We have reviewed 83 consecutive cementless Furlong hydroxyapatite (HA)-coated threaded acetabular components which were inserted in 75 patients. The mean age of the patients at the operation was 54 years (range 31 to 67 years) and the mean follow-up period was 61 months (range 40 to 82 months). Large size gaps at the implant -bone interface (attributed to failure to achieve bone-prosthesis contact), were present in 89% of the cases on the initial radiographs. At the last follow-up, the gaps were either no longer visible or had decreased in 95% of the cases. Radiolucencies were absent in well-fixed components. Three acetabular components were considered to be loose and are awaiting revision, giving a 3.6% aseptic loosening rate. The remainder of the cups were radiographically stable with positive evidence of bone ingrowth and no signs of impending loosening.

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Klein, Alexander, Bernd Wegener, Andreas Büttner, Carolin Melcher, Volkmar Jansson, and Christoph von Schulze Pellengahr. "Experimental measurements of micromotions of the cementless intervertebral disc prostheses in the cadaver bone." Clinical Biomechanics 92 (February 2022): 105589. http://dx.doi.org/10.1016/j.clinbiomech.2022.105589.

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