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- Title
In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition.
- Authors
Kihara, Masafumi; Ogino, Yoichiro; Matsushita, Yasuyuki; Morita, Takehiro; Sawae, Yoshinori; Ayukawa, Yasunori; Koyano, Kiyoshi; Caputi, Sergio
- Abstract
The purpose of this study was to investigate the effects of implant position and loading position on biomechanical behaviors using implant-supported removable partial denture (ISRPD) models in a simulated Kennedy class Ⅱ partially edentulous mandible. Three types of Kennedy class Ⅱ mandibular acrylic resin models (a conventional RPD without support by an implant—CRPD; models with an implant placed at first molar (#46)—MP-ISRPD— and second molar (#47)—DP-ISRPD) were used to measure vertical displacement of the RPD, mesio-distal displacement of the abutment tooth, and bending moment of the abutment tooth and implant under one-point loading. The variables at three respective loading points (#45, #46 and #47) were compared statistically. Vertical displacement was suppressed in ISRPDs compared to the CRPD, and significant effects were identified under loading at the implant position. The largest meiso-distal displacement was observed in MP-ISRPD under #47 loading. Bending moments of the abutment tooth and implant were significantly higher in MP-ISRPD than in DP-ISPRD. In MP-ISRPD, a higher bending moment of the abutment tooth under #45 and #47 loading was detected, although the bending moment in DP-ISRPD was almost zero. The results of this study suggested that MP-ISRPD shows the specific biomechanical behaviors, although DP-ISRPD might provide biomechanical benefits under all one-point loading conditions.
- Subjects
BENDING moment; DENTAL implants; DENTAL abutments; MOLARS; MANDIBULAR prosthesis; BRIDGES (Dentistry); REMOVABLE partial dentures; ACRYLIC resins
- Publication
Materials (1996-1944), 2021, Vol 14, Issue 9, p2145
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma14092145