2026-06-29T03:12:53Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1036382025-03-18T12:57:21Zcom_20.500.14352_14col_20.500.14352_15

Influence of the use of transepithelial abutments vs. titanium base abutments on microgap formation at the dental implant–abutment interface: an in vitro study Cascos, Rocio Celemín Viñuela, María Del Pilar Alicia Mory Rubiños, Nataly Gómez Polo, Cristina Ortega, Rocio Agustín Panadero, Rubén Gómez Polo, Miguel Ángel This in vitro study aimed to assess the presence of microgaps at the implant-abutment interface in monolithic zirconia partial implant-supported fixed prostheses on transepithelial abutments versus Ti-base abutments.Methods: Sixty conical connection dental implants were divided into two groups (n = 30). The control group consisted of three-unit bridge monolithic zirconia connected to two implants by a transepithelial abutment. The test group consisted of monolithic zirconia three-unit restoration connected to two implants directly by a titanium base (Ti-base) abutment. The sample was subjected to thermocycling (10,000 cycles at 5 degrees C to 55 degrees C, dwelling time 50 s) and chewing simulation (300,000 cycles, under 200 N at frequencies of 2 Hz, at a 30 degrees angle). The microgap was evaluated at six points (mesiobuccal, buccal, distobuccal, mesiolingual, lingual, and distolingual) of each implant-abutment interface by using a scanning electron microscope (SEM). The data were analyzed using the Mann-Whitney U tests (p > 0.05).Results: The SEM analysis showed a smaller microgap at the implant-abutment interface in the control group (0.270 mu m) than in the test group (3.902 mu m). Statistically significant differences were observed between both groups (p < 0.05).Conclusions: The use or not of transepithelial abutments affects the microgap size. The transepithelial abutments group presented lower microgap values at the interface with the implant than the Ti-base group in monolithic zirconia partial implant-supported fixed prostheses. However, both groups had microgap values within the clinically acceptable range. 2024-04-29T14:01:40Z 2024-04-29T14:01:40Z 2024-04-29T14:01:40Z 2023-10-01 journal article https://hdl.handle.net/20.500.14352/103638 XXXX-XXXX 10.3390/ma16196532 1996-1944 eng Cascos R, Celemín-Viñuela A, Mory-Rubiños N, Gómez-Polo C, Ortega R, Agustín-Panadero R, Gómez-Polo M. Influence of the Use of Transepithelial Abutments vs. Titanium Base Abutments on Microgap Formation at the Dental Implant–Abutment Interface: An In Vitro Study. Materials. 2023; 16(19):6532 http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 International MDPI