RT Journal Article
T1 Microgap Formation in Conical Implant-Abutment Connections Under Oblique Loading: Influence of Cone Angle Mismatch Through Finite Element Analysis
A1 Gantier Takano, Marlene Kasumi
A1 Xing, Yiyun
A1 Ye, Ning
A1 Aparicio, Conrado
A1 Navarro Cuéllar, Carlos
A1 Barbosa Cruz Meira, Josete
A1 Siu Lun Fok, Alex
AB ObjectivesThis study evaluated different designs of the conical implant-abutment connection (IAC) and their resistance to microgap formation under oblique loads as specified by the ISO standard for testing dental implants. Also evaluated was the effect of deviations from the ISO specifications on the outcomes.MethodsFinite element analysis was conducted to compare the microgap formation and stress distribution among three conical IAC designs (A, B, and C) in two loading configurations: one compliant with ISO 14801 and one with a modified load adaptor (non-ISO). The different IAC designs varied in the taper, diameter, and cone height. The cone angle mismatch (Cam) between the implant and abutment was considered. A torque of 20 Ncm and oblique loads (up to 400 N) were simulated.ResultsThe stresses produced by the screw-tightening torque varied among the different IAC designs. The contact height was approximately 0.3 mm for Designs A and B, and less than 0.03 mm for Design C. Under oblique loads, Design A maintained IAC sealing without gap formation up to 400 N. With the ISO adaptor, gaps appeared in Design B at 300 N and in Design C at 90 N. The non-ISO adaptor resulted in gap formation at 160 N for Design B and at 50 N for Design C.ConclusionsThe IAC design and cone angle mismatch significantly influenced microgap formation, with some designs showing zero gaps even when the oblique load reached 400 N. The non-ISO adaptor increased gap formation in IACs B and C.
PB Wiley
SN 1523-0899
YR 2025
FD 2025-01-22
LK https://hdl.handle.net/20.500.14352/115733
UL https://hdl.handle.net/20.500.14352/115733
LA eng
NO Gantier-Takano, M.K., Xing, Y., Ye, N., Aparicio, C., Navarro Cuéllar, C., Meira, J.B.C. and Fok, A.S.L. (2025), Microgap Formation in Conical Implant-Abutment Connections Under Oblique Loading: Influence of Cone Angle Mismatch Through Finite Element Analysis. Clin Implant Dent Relat Res, 27: e13436. https://doi.org/10.1111/cid.13436
NO Mozo-Grau SA
DS Docta Complutense
RD 12 abr 2025