{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T04:40:46Z","timestamp":1784695246847,"version":"3.55.0"},"reference-count":38,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2022,6,19]],"date-time":"2022-06-19T00:00:00Z","timestamp":1655596800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>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\u00ae abutment with nylon retention insert (NY), Novaloc\u00ae abutment with PEEK retention insert (PK), Locator\u00ae abutment with PVS retention insert (RL), and Novaloc\u00ae 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 &lt; 0.05) at 6 and 12 months for the RL group (p &lt; 0.05) after artificial aging. The RN group exhibited a constant retentive force (p &gt; 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.<\/jats:p>","DOI":"10.3390\/molecules27123925","type":"journal-article","created":{"date-parts":[[2022,6,19]],"date-time":"2022-06-19T10:14:52Z","timestamp":1655633692000},"page":"3925","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Effect of Various Retentive Element Materials on Retention of Mandibular Implant-Retained Overdentures"],"prefix":"10.3390","volume":"27","author":[{"given":"Atitiya","family":"Chindarungruangrat","sequence":"first","affiliation":[{"name":"Residency Training Program, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2427-2890","authenticated-orcid":false,"given":"Trinuch","family":"Eiampongpaiboon","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9338-0836","authenticated-orcid":false,"given":"Bundhit","family":"Jirajariyavej","sequence":"additional","affiliation":[{"name":"Bundhit Jirajariyavej, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1016\/j.sdj.2014.10.001","article-title":"An ageing population poses dental challenges","volume":"35","author":"Thomson","year":"2014","journal-title":"Singapore Dent. 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