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Journal articles on the topic 'Retention'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

Fernandes, Érica, Maria Cristina Freitas, Paula Oltramani-Navarro, Ricardo Navarro, Rafael Menezes-Silva, Linda Wang, José Roberto Lauris, and Maria Fidela Navarro. "Proximal retention grooves may increase early fracture strength of ART restorations." Brazilian Dental Science 22, no. 1 (January 31, 2019): Process. http://dx.doi.org/10.14295/bds.2019.v22i1.1682.

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Objective: To evaluate the fracture resistance (RF) of Class II Glass-ionomer Cement (GIC) ART restorations with and without proximal retentions. Material and Methods: 20 freshly extracted human molars were used. Forty (40) standard Mesial-Occlusal (MO) and Distal-Occlusal (DO) preparations (20 for each material) were performed with a 245 bur. The unprepared surfaces of the teeth were protected with nail polish and the specimens submerged in 0.5Mol EDTA solution, pH 7.4 for 8h under stirring. The preparations were finished with dentine spoons and 50% received proximal retention with # 3 excavators. 20 cavities were restored with Chemfil Rock (10 with retention and 10 without retention) and 20 cavities were restored with Equia Fil (10 with retention and 10 with no retention) and were stored in an oven at 37ºC and 100% relative humidity for 24h and submitted to axial compression loading in Test Machine - EMIC at a rate of 0.5 mm / minute, until restoration fracture occurred. The values were analyzed by two-way ANOVA (p<0.05). Results: ChemFil Rock presented 300.84 (69.20) (without retention) and 361.70 (81.08) (with retention) and Equia Fil showed 314.60 (69.97) (without retention) and 366.67 (103.38) (with retention). Data obtained with retention were statistically superior to those obtained with non-retained ART restorations (p=0.014). No statistical differences were detected between materials (p=0.761). Conclusion: Retentive grooves improved fracture resistance of Class II GIC ART restorations. KeywordsDental materials; ART; Glass ionomer cements.

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Johnson, David. "Retention and Reform in Japanese Capital Punishment." University of Michigan Journal of Law Reform, no. 49.4 (2016): 853. http://dx.doi.org/10.36646/mjlr.49.4.retention.

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This Article focuses on the failure of abolition and of death penalty reform in Japan in order to illustrate contingencies in the trajectory of capital punishment in the modern world. Part I describes three facts about postwar Japan that help explain why it retains capital punishment today: a missed opportunity for abolition during the American occupation of the country after World War II; the long-term rule of a conservative political party; and economic and geopolitical power that has enabled the country to resist the influence of international norms. Part II describes a few ways in which Japanese capital punishment has changed in recent years— and many ways in which it has not. Part III focuses on four causes of continuity in capital punishment in Japan: the rarity of exonerations in Japanese criminal justice; a jurisprudence that does not treat death as a special form of criminal punishment requiring extra safeguards for criminal defendants in capital cases; a high degree of secrecy surrounding executions and capital sentencing; and a society in which race is not regarded as a salient factor in the administration of capital punishment. Part IV suggests how reform in Japanese capital punishment might be accomplished by challenging some of the causes of continuity. Part V concludes by observing that the road to death penalty reform is not merely a positive path requiring leadership from the front in the face of public support for the institution. It is also a negative path leading away from beliefs and practices that present obstacles to the institution’s diminution and abrogation.

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Chindarungruangrat, Atitiya, Trinuch Eiampongpaiboon, and Bundhit Jirajariyavej. "Effect of Various Retentive Element Materials on Retention of Mandibular Implant-Retained Overdentures." Molecules 27, no. 12 (June 19, 2022): 3925. http://dx.doi.org/10.3390/molecules27123925.

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This study aimed to examine the retentive characteristics of each retentive element material and the effects from thermocycling using the two implant-retained mandibular overdenture model. Two stud abutments and three retentive element materials; nylon, polyetheretherketone (PEEK) and polyvinylsiloxane (PVS) were used in this study. Four tested groups, with a total of 40 overdentures, were fabricated, including a Locator® abutment with nylon retention insert (NY), Novaloc® abutment with PEEK retention insert (PK), Locator® abutment with PVS retention insert (RL), and Novaloc® abutment with PVS retention insert (RN). The retentive force (N) was measured before thermocycling, and at 2500, 5000, and 10,000 cycles after thermocycling. Significant changes in the percentage of retention loss were found in the NY and PK groups (p < 0.05) at 6 and 12 months for the RL group (p < 0.05) after artificial aging. The RN group exhibited a constant retentive force (p > 0.05). The tendency of the percentage of retention loss significantly increased for PEEK, nylon, and PVS silicone over time. The results of the present study implied that retentive element materials tend to lose their retentive capability as a result of thermal undulation and water dispersion. Nylon and PEEK, comprising strong polar groups in polymer chains, showed a higher rate of retention loss than polyvinylsiloxane.

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D, VENKATRAMA RAJU, KAMARAJ S, and KANNAN J. "Employee Retention Techniques." Journal of Research on the Lepidoptera 50, no. 1 (March 25, 2019): 40–47. http://dx.doi.org/10.36872/lepi/v50i1/201055.

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5

Bozorovich, Chorshambiyev Akbar. "ETIOPATHOGENESIS AND EFFECTIVE TREATMENT METHODS OF RETAINED PLACENTA IN COWS." European International Journal of Multidisciplinary Research and Management Studies 02, no. 10 (October 1, 2022): 22–27. http://dx.doi.org/10.55640/eijmrms-02-10-04.

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Retention of the fetal membranes in the uterus beyond the term is called retention of the placenta (Retentio placentae, s. Retentio secondinarum). The disease often occurs in ruminant animals and mainly in cows. If the placenta does not descend naturally, it is separated 24-28 hours after the birth of the fetus in cows. Complete, incomplete, partial retention of the placenta is distinguished. Currently, conservative and operative methods of treatment of retained placenta are used in production practice.

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Paken, Gamze, and İrem Karagözoğlu. "Detection of the effects of the various denture cleansing methods on overdenture retentive attachments with a scanning electron microscope." Balkan Journal of Dental Medicine 26, no. 3 (2022): 183–87. http://dx.doi.org/10.5937/bjdm2203183p.

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Background/Aim: The purpose of this in vitro study was to evaluate the effect of mechanical and chemical denture cleansing methods on dental attachments of varying retention with a scanning electron microscope. Material and Methods: An implant analog and a male part of a dental attachment were embedded into an acrylic block, and an abutment was screwed onto the analog. Different locator attachments with varying retention were tested using different denture cleansing methods and tap water for a time simulating 12 months of clinical use. A pull-out test was performed for each attachment, followed by analysis of the samples with a scanning electron microscope. Results: For the blue attachment group, there was no statistically significant difference between the retention values of control and chemical and mechanical denture cleansing groups (p>0.05). The clear and pink attachments were affected by chemical and mechanical denture cleansing, and had significantly decreased retention values compared to the control group (p<0.05). For both types of attachments, the mechanical cleansing group exhibited the lowest retention loss value. Scanning electron microscopy results showed that surface irregularities, scratch lines, and deformations were detected in chemical and mechanical denture cleansing groups for all types of retentive attachments. Conclusions: Both attachment systems with different retentions were influenced by the denture cleansing method. Considering the results, clinicians could recommend the most appropriate method to patients, one that does not adversely affect the properties of the retainer parts. Clinicians should not advise using mechanical and chemical denture cleansing methods to protect the long-term retention of pink and clear attachments.

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Pretty, J. L., and M. Dobson. "Leaf transport and retention in a high gradient stream." Hydrology and Earth System Sciences 8, no. 3 (June 30, 2004): 560–66. http://dx.doi.org/10.5194/hess-8-560-2004.

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Abstract. To a large extent, the invertebrate fauna in wooded streams rely upon detritus inputs from the surrounding vegetation as their main food source. Conifer plantations may alter the timing and nutritional quality of leaf inputs into streams, but detritus retention may also be reduced. While it has often been assumed that conifer needles are retained less than broadleaved species, this has never been tested experimentally. This study describes the results of a leaf release experiment carried out in a small headwater stream, comparing the retention of pine needles and oak leaves (wet and dry) over a range of discharges. In addition, retention was compared before and after placing logs in the stream to examine the effect of woody debris on retention efficiency. Retention efficiency was significantly different among the three leaf types tested with wet oak leaves being most retentive, followed by dry oak leaves with dry pine needles being least retentive. Retention efficiency declined significantly with increasing discharge for all three leaf types. The addition of logs increased the retention of dry oak leaves and pine needles, but not wet oak leaves. The predominant features (stones, logs, eddies and bankside vegetation) that accounted for retention varied with discharge and the leaf type used. The results indicate that while conifer needles may be inherently less retentive than broadleaves, the presence of woody debris within the stream channel increases their retention. However, this small-scale study would need to be expanded to investigate the retention dynamics of conifer needles in plantation streams. Nevertheless, management strategies that allow the formation of woody debris accumulations in plantation streams could be valuable in enhancing detritus retention and consequently could benefit invertebrate communities. Keywords: pine needles, retention efficiency, woody debris, discharge

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Ali, Taban, and Kawan Othman. "Retention Evaluation of Implant-Supported Mandibular Overdenture Using Two Different Attachment Systems: An in Vitro Study." Sulaimani Dental Journal 10, no. 3 (December 1, 2023): 11. http://dx.doi.org/10.17656/sdj.10175.

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Objective: The purpose of this in vitro study was to evaluate the retentive behavior of implant-supported overdenture using two different attachment systems (locator and milled bar-clip attachment system). Methods: Six edentulous mandibular models were fabricated from cold‑cure PMMA; the denture-bearing area of the acrylic resin model was covered by an approximately 1.5 mm thick silicone resilient liner to simulate mucosa. The Study models were divided into three groups: Model A (locator), Model B (milled bar-clip attachment system without extension), and Model C (milled bar-clip attachment system with 1cm extension). However, for each study model, a complete mandibular denture was constructed. Anterior, posterior, and central dislodging forces were measured by digital force gauge at the beginning of the study (Initial retention) and after 540 courses of consecutive pulling and inserting the prosthesis (final retention), which was to simulate six months of overdenture use assuming three daily removals and insertions for oral hygiene practice. Results: There were statistically significant differences in retention between the group models, and milled bar-clips attachment systems revealed the highest retentive capacity. However, after six months of simulated use, there was a significant retention loss; retention of Model B recorded the highest percentage loss of 55.1%, while Model A recorded the most minor retention loss of 24%. Conclusions: The bar and clip attachment system offered higher retentive values than the locator attachment system. However, the retention loss was correlated to the particular attachment system, and the bar–clip attachment systems had the highest percent of retention loss. In contrast, the locator attachments were associated with acceptable retention, simplicity, and minimal retention.

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Roppolo, Lynn P., and Paul E. Pepe. "Retention, retention, retention: targeting the young in CPR skills training!" Critical Care 13, no. 5 (2009): 185. http://dx.doi.org/10.1186/cc7997.

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Sharaf, M. Y., Asharaf Eskander, and Mohamed Afify. "Novel PEEK Retentive Elements versus Conventional Retentive Elements in Mandibular Overdentures: A Randomized Controlled Trial." International Journal of Dentistry 2022 (February 28, 2022): 1–9. http://dx.doi.org/10.1155/2022/6947756.

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Background. Many patients suffer from lack of retention of conventional mandibular overdentures due to loss of clip retention over time. Computer-aided design-computer-aided manufacturing (CAD-CAM) milled polyether ether ketone (PEEK) materials may be used for the construction of retentive housing and clips for improving retention of implant-supported overdentures. Objective. To compare retention and patient satisfaction of implant-supported mandibular overdentures retained by conventional nylon clip and metal housings for ball attachments versus PEEK clip and housings. Methods. Twenty-two participants were divided into 2 equal groups (n = 11). The conventional group received implant-supported mandibular overdentures retained by metal housings and nylon retentive elements, while the PEEK group received implant-supported mandibular overdentures retained by PEEK retentive elements and housings. The PEEK retentive elements were made using computer-aided design and computer-aided manufacturing (CAD-CAM). The evaluation included measuring the retention by applying a gradual pulling up force by force meter and patient satisfaction with a 7-point visual analog scale (VAS) at overdenture insertion and 3, 6, and 12 months subsequently by a research interviewer. Results. The PEEK group showed statistically significantly increased retention force ( P < 0.05 ) at the time of insertion (37.6/17.79) and after 3 months (33.9/16.78), 6 months (32.7/15.97), and 12 months (31.65/13.05). The conventional group had a statistically significantly higher mean overall satisfaction ( P < 0.05 ) at the time of insertion (65/82.18). No statistically significant difference was found after 3 months (87.81/84.72). The PEEK group showed statistically significantly higher mean overall satisfaction ( P < 0.05 ) after 6 months (86.36/80.18) and 12 months (85.45/79.54). Conclusions. According to the results of this study, the PEEK retentive material provided more retention than did the conventional material and led to improved patient satisfaction. The study was registered at clinical trials.gov (https://clinicaltrials.gov/ct2/show/NCT05079048).

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Vinaya, Kundapur, Krishna Prasad D, Hegde Rakshith, Shetty Manoj, Mankar Sunil, and Shetty Naresh. "To Evaluate & Compare Retention of Complete Cast Crown in Natural Teeth Using Different Auxiliary Retentive Features with Two Different Crown Heights - An In Vitro Study." International Journal of Biomedical Science 11, no. 2 (June 15, 2015): 99–106. http://dx.doi.org/10.59566/ijbs.2015.11099.

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Background & objectives: To evaluate the retention of complete cast crowns in teeth with adequate and inadequate crown height and to evaluate the effects of auxiliary retentive features on retention form complete cast crowns. Materials and methods: Sixty freshly extracted human premolars. They were divided into 2 major groups depending upon the height of the teeth after the preparation. Group1 (H1): prepared teeth with constant height of 3.5 mm and Group 2 (H2): prepared teeth with constant height of 2.5 mm. Each group is further subdivided into 3 subgroups, depending upon the retentive features incorporated. First sub group were prepared conventionally, second sub group with proximal grooves and third subgroups with proximal boxes preparation. Castings produced in Nickel chromium alloy were cemented with glass ionomer cement and the cemented castings were subjected to tensional forces required to dislodge each cemented casting from its preparation and used for comparison of retentive quality. The data obtained were statistically analyzed using Oneway ANOVA test. Results: The results showed there was statistically significant difference between adequate (H1) and inadequate (H2) group and increase in retention when there was incorporation of retentive features compared to conventional preparations. Incorporation of retentive grooves was statistically significant compared to retention obtained by boxes. Results also showed there was no statistically significant difference between long conventional and short groove. Conclusion: Complete cast crowns on teeth with adequate crown height exhibited greater retention than with inadequate crown height. Proximal grooves provided greater amount of retention when compared with proximal boxes.

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V.B.DEVIBALA, V. B. DEVIBALA, Dr P. ANBUOLI Dr.P.ANBUOLI, and T. JOTHIMURUGAN T.JOTHIMURUGAN. "Reason for Employee Retention." Indian Journal of Applied Research 4, no. 4 (October 1, 2011): 79–81. http://dx.doi.org/10.15373/2249555x/apr2014/230.

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Bais, Dr Santosh Singh. "Employee Retention Management:some Issues." International Journal of Scientific Research 1, no. 4 (June 1, 2012): 22–24. http://dx.doi.org/10.15373/22778179/sep2012/8.

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14

Fugariu, Ioana, Raphael Freitas de Souza, Eduardo Rosas, and Eduardo Borie. "Using an Attachment System with PEEK Matrices for Single-Implant Overdentures: In Vitro Retention Force." Journal of Clinical Medicine 12, no. 6 (March 10, 2023): 2159. http://dx.doi.org/10.3390/jcm12062159.

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Single-implant overdentures (SIOs) represent a major biomechanical challenge in terms of prosthetic retention. The Novaloc attachment system has the potential to overcome those challenges when used for SIOs, due to the use of PEEK matrices. This study compared the retentive force of the Novaloc attachment to the traditional Locator system, before and after cyclic insertion–removal cycles. Three Novaloc matrices (white, yellow, and green, corresponding to low, medium, and high retention, respectively) and Locator (medium retention) were tested, totalling four groups. Retentive force was measured using an Imada force gauge before and after 1095 insertion–removal cycles, corresponding to a year of SIO wearing. Retention was tested with the implants angulated at 0, 10, and 20°. Data for the different groups, angles, and cycling periods were tested via linear regression analysis and two-way ANOVA (α = 0.05). Although the Locator system yielded higher retention forces in general, it lost a much higher percentage of retention with cycling. This trend was similar with the three angles, with forces being inversely proportional to the implant angulation. The authors conclude that Novaloc may provide more reliable retention for SIOs due to their higher resistance to insertion–removal cycling.

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Ceraulo, Saverio. "Aesthetics in Removable Partial Dentures: Modification of the Proximal Plate and Retentive Lamellae in Kennedy Class II Scenarios." Prosthesis 6, no. 1 (January 25, 2024): 107–18. http://dx.doi.org/10.3390/prosthesis6010009.

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The removable partial denture, despite new technologies and new materials, continues to play a significant role in clinical dental practice. The purpose of the following study was to evaluate the design of new retention devices in Kennedy class II scenarios. For the study of “lamellar” retentive devices, four prosthetists were chosen. According to inclusion and exclusion criteria, prosthetists selected 16 patients (8 women and 8 men) whose upper arches had to be rehabilitated using a removable partial prosthesis. The results showed that the parameters taken into consideration, such as satisfaction, stability, aesthetics, and retention, had an average score that was higher than 3.30 (range 1–4), with an average standard deviation of 0.6225 in the four parameters, indicative that the data were relatively homogeneous and coherent. In conclusion, we can state that the skeletonized prosthesis with lamellar retentions, designed for Kennedy class II scenarios, has shown high acceptance in selected patients.

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Haridy, Hossam, Hebatallah ElAfandy, Mohamed Abdallah, and Ahmed Ossama. "Comparison between Two Different Attachment Caps Used in Comparison between Two Different Attachment Caps Used in Locator Attachments of Implant supported Overdentures (In-Vitro Locator Attachments of Implant supported Overdentures (In-Vitro Study)." Future Dental Journal 8, no. 1 (June 1, 2022): 41–45. http://dx.doi.org/10.54623/fdj.8017.

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Purpose: To compare different retentive cap material used in LOCATOR attachments, namely the nylon retentive cap versus PEEK retentive caps, and measure the loss of retention over a period of two years, through 2880 cycles of insertion and removal. Materials and methods: Two implants 3.8mm x 10.5mm were inserted into a clear epoxy resin cast, through a surgical guide, with the implants being 23mm apart. Two LOCATOR attachments with 5 mm gingival height were screwed to the implants, custom made nylon caps were fabricated as an exact replica of the PEEK retentive caps, then two dentures were constructed and pick up were done with both retentive cap materials. A hook was attached to the geometric center of both dentures, and measurement of the retentive forces was accomplished with a universal testing machine, and the data was recorded and analyzed. Results: The amount of retention achieved from PEEK retentive caps was twice that of the nylon retentive caps, indicating high statistical significance (p < 0.001) of the effect of the material and remained so throughout the repeated cycles with (p < 0.001), however both caps showed similar rate of retention loss throughout the study, but the amount of wear was statistically higher in the PEEK group throughout the cycles, except after 2880 cycles. Conclusion: PEEK showed higher retentive properties throughout the cycles, but both materials showed similar rate of retention loss

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Bedford, Marilyn H., and Peter E. Durkee. "Retention." NASPA Journal 27, no. 2 (October 1, 1989): 168–71. http://dx.doi.org/10.1080/00220973.1989.11072151.

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hall Johnson, Suzanne. "Retention." Dimensions of Critical Care Nursing 7, no. 1 (January 1988): 3–4. http://dx.doi.org/10.1097/00003465-198801000-00001.

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&NA;. "Retention." Nursing Management (Springhouse) 24, no. 1 (January 1993): 76. http://dx.doi.org/10.1097/00006247-199301000-00015.

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Thompson, Elizabeth M. "Retention." OR Nurse 4, no. 1 (January 2010): 5. http://dx.doi.org/10.1097/01.orn.0000366013.54700.c5.

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Davenport, J. C., R. M. Basker, J. R. Heath, J. P. Ralph, and P.-O. Glantz. "Retention." British Dental Journal 189, no. 12 (December 2000): 646–57. http://dx.doi.org/10.1038/sj.bdj.4800854.

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Davenport, J., R. Basker, J. Heath, J. Ralph, and P. Glantz. "Retention." British Dental Journal 189, no. 12 (December 23, 2000): 646–57. http://dx.doi.org/10.1038/sj.bdj.4800854a.

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McGuire, Maureen, Janet Houser, Thafer Jarrar, Wendy Moy, and Michelle Wall. "Retention." Health Care Manager 22, no. 1 (January 2003): 38–44. http://dx.doi.org/10.1097/00126450-200301000-00007.

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SPICER, JOAN GYPAX, and VIRGINIA L. MACIOCE. "Retention." Nursing Management (Springhouse) 18, no. 5 (May 1987): 54J. http://dx.doi.org/10.1097/00006247-198705000-00014.

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Raj, Indu, Femitha Syed, and Tony Joy. "CUSTOMIZED THERMOPLAST RETENTIVE AID FOR PARTIAL AURICULAR PROSTHESIS-A CASE REPORT." International Journal of Advanced Research 11, no. 02 (February 28, 2023): 212–20. http://dx.doi.org/10.21474/ijar01/16242.

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Auricular prostheses were traditionally retained using chemical adhesives ,mechanical retentive aids or natural undercuts at retention sites.These methods have the limitation of frequent loss of retention, skin reactions to adhesives, or unnatural movements of the prosthesis. Osseo integrated implants which has superior advantages over others have disadvantages for patients with financial constraints and/or who are apprehensive of surgery.Also, extraoral implants require adequate thickness of bone, which may be deficient in certain cases. In this case report,we have described about a new technique of fabricating and incoporating a customized thermoplastic auricular retentive aid thus utilizing both anatomic and mechanical retention.

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Vacari, Thaisa Camila, Jocilan Rodrigues Lara, Zoraidy Marques de Lima Lima, and Eduardo Beraldo de Morais. "Water quantity investigation of simulated green roofs in a tropical climate: influence of vegetation composition." E&S Engineering and Science 8, no. 2 (July 17, 2019): 2–14. http://dx.doi.org/10.18607/es201988046.

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Green roofs are recognized as a sustainable infrastructure to improve the environmental quality of cities. Among many benefits, green roofs reduce the rate and volume of runoff helping to improve rainwater management. This study investigated the runoff retention capacity of three pilot extensive green roof assemblies with different vegetation (grass, shrub and intercropping of the two plants). Rainwater runoff data were collected for 18 rainfall events that ranged from a minimum of 1.6 mm to a maximum of 157.9 mm. Average precipitation event retention efficiencies were 46.7, 59.7 and 61.6% for intercropped, shrub and grass green roofs, respectively, while the annual runoff retention rates were 43.8, 57.3 and 59.7%. The difference in retention rates for the green roofs with different vegetation was not statistically significant. The rainfall intensity influenced the retention rates, with the highest retentions for small events (<10.0 mm) followed by medium (10.0-24.9 mm). Retention was found to correspond significantly to rainfall depths. On the other hand, regression analysis failed to provide a relationship between retention and antecedent dry weather period (ADWP). The organic soil used as substrate appears to be the deciding factor for rainwater retention.

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Kirtika, Reeta Jain, Ravudai Jabbal, Gagandeep Kansal, and Sumit Chopra. "Retention of maxillofacial prosthesis: A review." IP Annals of Prosthodontics and Restorative Dentistry 9, no. 3 (October 15, 2023): 135–41. http://dx.doi.org/10.18231/j.aprd.2023.027.

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The facial region defects caused by trauma, accident, tumor or congenital defects are treated with special facial prostheses. Retention is one of the most important factors that determines the success of a maxillofacial prosthesis. Retention has always been a problem in prosthodontics other than esthetics. Increased retention improves comfort as well as the confidence in the patient while wearing a facial prosthesis at work and in social settings thereby improving the long-term prognosis of the prosthesis. In the present article, the methods used for the retention of prostheses from past to present were researched, and the advantages of the retention procedures and the most commonly used current methods, were evaluated. The article describes different types of retentive aids in maxillofacial prosthesis.

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Mishra, Khushbu. "Evaluation of change in implant abutment after teeth surface modifications." Bioinformation 17, no. 1 (January 31, 2021): 157–61. http://dx.doi.org/10.6026/97320630017157.

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The surface modifications in teeth increase the retentive strength of cemented castings by providing micro as well as macro retentive ridge and groove patterns. Restoring the dental implants with cement-retained prosthesis is well known. Therefore, it is of interest to compare retentive property of implant abutments with and without circumferential grooves. Hence, 20 straight shoulder type titanium abutments were with abutment screws as well as prefabricated plastic copings and corresponding 12 mm-long stainless steel laboratory implant analogs were used. The abutments were divided into two subgroups of 10 abutments each: without grooves and with grooves. After thermocycling and storing the cemented abutments in water at 37°C water for 6 days they were assembled in the Universal testing machine and subjected to a pullout test (retention) at a crosshead speed of 5.0mm/min to record forces in Newton. Data suggest that the addition of grooves increased the retention. The mean retentive forces of standard machined abutments (plain) cemented with Resin modified GIC showed 339.34 N. Retention increased by 667.39N after addition of circumferential grooves. The surface modification of an implant abutment by means of circumferential grooves is an effective method of improving the retention of cast crowns cemented with resin modified GIC especially in short abutments.

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Rathnayake, Buddhika, Hanna Valkama, Markku Ohenoja, Jasmiina Haverinen, and Riitta L. Keiski. "Evaluation of Nanofiltration Membranes for the Purification of Monosaccharides: Influence of pH, Temperature, and Sulfates on the Solute Retention and Fouling." Membranes 12, no. 12 (November 30, 2022): 1210. http://dx.doi.org/10.3390/membranes12121210.

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Furfural, acetic acid, and sulfates are found in the hemicellulose (HMC) fraction of lignocellulosic biomass. Separation of furfural, acetic acid, and sulfates from monosaccharides by four nanofiltration (NF) membranes was evaluated with a model solution of glucose, xylose, furfural, acetic acid, and sulfates. Results showed that Alfa Laval NF99HF is the most promising membrane to purify monosaccharides, with the retentions of xylose (85%), glucose (95%), and with the minimum sulfate retention. pH has the highest impact on the retention of all solutes and there is no significant effect of temperature on the retentions of sulphates and acetic acid. Lower pH and temperature are favored to maximize the monosaccharide retention and to remove acetic acid while retaining more furfural with the monosaccharides. Moreover, fouling tendency is maximized at lower pH and higher temperatures. According to the statistical analysis, the retentions of glucose, xylose, furfural, sulfates, and acetic acid are 95%, 90%, 20%, 88%, and 0%, respectively at pH 3 and 25 °C. The presence of sulfates favors the separation of acetic acid and furfural from monosaccharides.

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S, Jayanthy, Velanganni R, and Santhosh Kumar G. "A Study on Employee Retention." Journal of Advanced Research in Dynamical and Control Systems 11, no. 0009-SPECIAL ISSUE (September 25, 2019): 1315–19. http://dx.doi.org/10.5373/jardcs/v11/20192742.

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Timofeev, A. A. "Eruption delay (retention) and tooth displacement (dystopia)." SUCHASNA STOMATOLOHIYA 103, no. 4 (2020): 66–69. http://dx.doi.org/10.33295/1992-576x-2020-4-66.

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Ретенция зуба (retentio dentis; лат. Retention – удерживание, задерживание; син.: задержка зуба) – задержка сроков прорезывания нормально сформировавшегося постоянного зуба. Полная ретенция – это когда непрорезавшийся зуб полностью находится в костной ткани

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Mutto, Juan Cruz, Tabata Prado Sato, João Mauricio Ferraz Da Silva, Alexandre Luiz Souto Borges, and Eduardo Shigueyuki Uemura. "Retentiveness comparison of individual clasps made from polyamide, acetate resin and cobalt-chrome for removable partial dentures." Brazilian Dental Science 22, no. 4 (October 31, 2019): 483–87. http://dx.doi.org/10.14295/bds.2019.v22i4.1802.

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Objective: This study aimed to evaluate and compare the retention force of individual clasps made from polyamide, acetate resin and cobalt-chrome for removable partial dentures. Material and methods: Three groups of clasps were fabricated: Cr-Co - 10 conventional chrome-cobalt metal clasps; Ac - 10 clasps with reciprocal arms and occlusal rests in chrome-cobalt and retentive arms in acetate resin; and Poly - 10 clasps with reciprocal arms and occlusal rests in chrome-cobalt and retentive arms in polyamide resin. Through the tensile test, in a universal testing machine, the initial retention force of the specimens was obtained and then clasps were cycled 7200 times, immersed in artificial saliva (60 months of simulated clinical use). After cycling, tensile test was performed. Results: All groups presented a retention decrease after the cycling. Ac presented a large reduction in retentive force (61.43%), followed by Cr-Co (26.5%) and Poly (12.09%). Conclusions: Aesthetic clasps of polyamide can be used in clinical cases where the anterior supporting teeth will not be essential for good retention of the removable partial denture because this clasp showed to be more resistant than the acetate resin.

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Sanderson, R., M. S. Dhanoa, C. Thomas, and D. E. Beever. "Comparison of calorimetry and comparative slaughter for estimating energy retention and k_f by young steers." Proceedings of the British Society of Animal Science 1995 (March 1995): 146. http://dx.doi.org/10.1017/s1752756200591418.

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Where indirect calorimetry and slaughter techniques have been compared previously (eg: Geay, 1984; Beever et al, 1988) estimates of energy retention have tended to be greater from calorimetry than from slaughter studies. However, in most instances each technique was applied to a different group of animal and over only a limited range in energy retention. The aim of this work was to examine the difference between estimates of energy retention obtained using a direct technique (comparative slaughter) (ERs) and an indirect technique (open circuit respiration calorimetry) (ERc) applied to the same group of animals and over a relatively wide range of energy retentions.

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Sanderson, R., M. S. Dhanoa, C. Thomas, and D. E. Beever. "Comparison of calorimetry and comparative slaughter for estimating energy retention and kf by young steers." Proceedings of the British Society of Animal Science 1995 (March 1995): 146. http://dx.doi.org/10.1017/s0308229600029123.

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Where indirect calorimetry and slaughter techniques have been compared previously (eg: Geay, 1984; Beever et al, 1988) estimates of energy retention have tended to be greater from calorimetry than from slaughter studies. However, in most instances each technique was applied to a different group of animal and over only a limited range in energy retention. The aim of this work was to examine the difference between estimates of energy retention obtained using a direct technique (comparative slaughter) (ERs) and an indirect technique (open circuit respiration calorimetry) (ERc) applied to the same group of animals and over a relatively wide range of energy retentions.

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Delgado-González, Laura, Bruno Lartiges, Mathieu Gautier, Stéphane Troesch, and Pascal Molle. "Phosphorus retention by granulated apatite: assessing maximum retention capacity, kinetics and retention processes." Water Science and Technology 83, no. 4 (January 7, 2021): 792–802. http://dx.doi.org/10.2166/wst.2021.010.

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Abstract Natural apatites have previously shown a great capacity for phosphate retention from wastewater. However, its fine particle size distribution may lead to a premature clogging of the filter. Accordingly, a granulated apatite product was developed and manufactured in order to control the particle size distribution of the media. Experiments were conducted on laboratory columns to assess their phosphorus retention capacity, to identify the processes involved in phosphorus retention and to evaluate their kinetic rates. The results showed phosphorus retention capacities of 10.5 and 12.4 g PO4-P·kg−1 and kinetic rate coefficients in the range of 0.63 and 0.23 h−1 involving lower values than those found for natural apatites in previous studies. Scanning Electron Microscopy images showed that apatite particles in the granules were embedded in the binder and were not readily accessible to act as seeds for calcium phosphate precipitation. The retention processes differ depending on the supersaturation of the solution with respect to calcium phosphate phases: at low calcium concentrations (69.8 ± 3.9 mg·L−1), hydroxyapatite precipitates fill up the porosity of the binder up to a depth of 100–300 μm from the granule surface; at higher calcium concentrations (112.7 ± 7.4 mg·L−1) precipitation occurs at the granule surface, forming successive layers of hydroxyapatite and carbonated calcium phosphates.

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Weed, Roger Martin. "A Comparison of Methods for Increasing Retention of Complete Veneer Crowns." International Journal of Experimental Dental Science 4, no. 2 (2015): 95–98. http://dx.doi.org/10.5005/jp-journals-10029-1104.

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ABSTRACT Aim To determine if boxes or grooves were effective in enhancing the retention of full veneer crowns. Materials and methods Ten full veneer crown preparations were machined out of brass with 10 different configurations. They consisted of a plain short preparation, a plain long preparation and preparations with 1 to 4 boxes or 1 to 4 grooves. Ten gold castings were fabricated for each preparation and the cemented. An Instron* was used to remove the castings with the force required recorded in Newtons. Results Statistical differences were found in retention between various configurations with boxes being universally more retentive than grooves or the plain crowns. Conclusion All the box configurations significantly enhanced retention. Therefore, one box alone would provide the enhanced retention needed for a full veneer crown without the need to create additional retention features. How to cite this article Weed RM. A Comparison of Methods for Increasing Retention of Complete Veneer Crowns. Int J Experiment Dent Sci 2015;4(2):95-98.

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Srimulyani, Veronika Agustini, and Yustinus Budi Hermanto. "Employer branding and employee performance at KAI: employee retention' role as mediator." Jurnal Studi Komunikasi (Indonesian Journal of Communications Studies) 6, no. 3 (November 21, 2022): 921–40. http://dx.doi.org/10.25139/jsk.v6i3.5381.

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Today's job seekers prefer well-known companies, even though they're less likely to be accepted. The HR team must brand the company as an employer. Employer branding can be a company's image, values, and work culture. Employer branding has a greater impact on employee loyalty than non-emotional factors on employees. This study aims to explain 1) employer branding's impact on employee retention and performance, 2) employee retention's impact on employee performance, and 3) employer branding's impact on employee performance through employee retention as a mediator. 110 frontline workers from PT Kereta Api Indonesia (Persero) DAOP VII Madiun made up the research sample. The sampling was proportional random. Using SPSS and Sobel, this study uses descriptive and inferential analysis. Influence test results show that employer branding increases employee retention and performance, and employee retention increases employee performance. The results of path analysis and Sobel test of the mediator's role show that the direct effect of employer branding on employee retention after being controlled by employee retention as a mediator is not significant. Employee retention acts as a full mediator for employer branding's effect on employee performance, according to the mediator test. 2) Companies can improve employee performance by improving employee retention via career opportunities, awards, and employee relationships.

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Shuayb, Ruba, and Mohamed Abokrais. "Effect of Different Degrees of lingual Implant Inclination on the Retention of Locator Retained Mandibular Implant Overdenture. An In-Vitro Study." Libyan Journal of Medical Research 18, no. 1 (January 1, 2024): 205–13. http://dx.doi.org/10.54361/ljmr18-1.20.

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Purpose: This study was condacted to evaluate and compare different degrees of lingual implant inclination on retention of locator attachments used for two implant retained mandibular overdentures .Materials and Methods: Four acrylic resin models representing acompletely edentulous mandibular ridges were used. Each model received two implants inserted at canine area bilaterally with different degree of lingual inclination. Group I (control Group) 00, Group II (100), Group III (200), and Group IV (300). The residual ridge and the retromlar regions for each acrylic resin model were covered by auto-polymerized silicon material to simulate the oral mucosa. Four experimental acrylic metal reinforced overdenture were fabricated and connected to the implants using Locator attachments, Universal Testing Machine was used for measuring initial and final retentive force, The Results: Locator transparent, 00 inclination and anterior dislodging recorded the highest retentive forces, while Locator blue 100 inclination and vertical dislodging recorded the lowest retention values. Conclusions: For majority of groups, inserts, dislodging forces, initial retention recorded significant higher values than final retention.

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Zhang, Gang, Dejian Wang, and Yuanchun Yu. "Investigation into the Effects of Straw Retention and Nitrogen Reduction on CH4 and N2O Emissions from Paddy Fields in the Lower Yangtze River Region, China." Sustainability 12, no. 4 (February 24, 2020): 1683. http://dx.doi.org/10.3390/su12041683.

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Straw retention is a widely used method in rice planting areas throughout China. However, the combined influences of straw retention and nitrogen (N) fertilizer application on greenhouse gas (GHG) fluxes from paddy fields merits significant attention. In this work, we conducted a field experiment in the lower Yangtze River region of China to study the effects of straw retention modes and N fertilizer rates on rice yield, methane (CH4) and nitrous oxide (N2O) emission fluxes, global warming potential (GWP), and greenhouse gas intensity (GHGI) during the rice season. The experiments included six treatments: the recommended N fertilizer—240 kg N·ha−1 with (1) no straw, (2) wheat straw, (3) rice straw, and (4) both wheat and rice straw retentions; in a yearly rice–wheat cropping system (N1, WN1, RN1, and WRN1, respectively); as well as both wheat and rice straw retentions with (5) no N fertilizer and (6) 300 kg N·ha−1 conventional N fertilizer (WRN0, WRN2). The results showed that CH4 emissions were mainly concentrated in the tillering fertilizer stage and accounted for 54.2%–87.5% of the total emissions during the rice season, and N2O emissions were primarily concentrated in the panicle fertilizer stage and accounted for 46.7%–51.4% total emissions. CH4 was responsible for 87.5%–98.5% of the total CH4 and N2O GWP during the rice season, and was the main GHG contributor in the paddy field. Although straw retention reduced N2O emissions from paddy field, it significantly increased CH4 emissions, which resulted in a significant net increase in the total GWP. Compared with the N1 treatment, the total GWP of WN1, WRN1, and RN1 increased by 3.45, 3.73, and 1.62 times, respectively; and the GHGI increased by 3.00, 2.96, and 1.52 times, respectively, so the rice straw retention mode had the smallest GWP and GHGI. Under double-season’s straw retentions, N fertilizer application increased both CH4 and N2O emissions, and the WRN1 treatment not only maintained high rice yield but also significantly reduced the GWP and GHGI by 16.5% and 30.1% (p < 0.05), respectively, relative to the WRN2 treatment. Results from this study suggest that adopting the “rice straw retention + recommended N fertilizer” mode (RN1) in the rice–wheat rotation system prevalent in the lower Yangtze River region will aid in mitigating the contribution of straw retention to the greenhouse effect.

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Keenan, P. "Indirect retention." British Dental Journal 200, no. 3 (February 2006): 153. http://dx.doi.org/10.1038/sj.bdj.4813250.

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Hernandez, David Hernández, Ricardo Bernardez Tesouro, and David Castro-Diaz. "Urinary retention." Urologia Journal 80, no. 4 (October 2013): 257–64. http://dx.doi.org/10.5301/ru.2013.11688.

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Uff, C. E. "Urinary retention." BMJ 338, apr29 1 (April 29, 2009): b1727. http://dx.doi.org/10.1136/bmj.b1727.

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Katz, Barbara. "Physician Retention." Emergency Medicine News 30, no. 1 (January 2008): 24. http://dx.doi.org/10.1097/01.eem.0000307646.75125.be.

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Katz, Barbara. "Physician Retention." Emergency Medicine News 30, no. 2 (February 2008): 26. http://dx.doi.org/10.1097/01.eem.0000312016.10260.b7.

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Katz, Barbara. "Physician Retention." Emergency Medicine News 30, no. 3 (March 2008): 32. http://dx.doi.org/10.1097/01.eem.0000313920.01362.86.

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Katz, Barbara. "Physician Retention." Emergency Medicine News 30, no. 4 (April 2008): 27. http://dx.doi.org/10.1097/01.eem.0000316472.52023.64.

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Katz, Barbara. "Physician Retention." Emergency Medicine News 30, no. 5 (May 2008): 29–30. http://dx.doi.org/10.1097/01.eem.0000319604.01828.20.

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Katz, Barbara. "Physician Retention." Emergency Medicine News 30, no. 6 (June 2008): 27. http://dx.doi.org/10.1097/01.eem.0000324845.65663.b9.

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Carter, Tony. "Managing Retention." Journal of Hospital Marketing & Public Relations 18, no. 1 (February 7, 2008): 89–112. http://dx.doi.org/10.1300/j375v18n01_08.

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Hamm, Rebecca, and Mark J. Speakman. "Urinary Retention." Surgery (Oxford) 20, no. 11 (November 2002): 273–75. http://dx.doi.org/10.1383/surg.20.11.273.14540.

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