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Impact of implant support on mandibular free‐end base removable partial denture: theoretical study
Author(s) -
Oh Wonsuk,
Oh TaeJu,
Park Jumi
Publication year - 2016
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12534
Subject(s) - removable partial denture , dentistry , implant , orthodontics , medicine , dentures , surgery
Objectives This study investigated the impact of implant support on the development of shear force and bending moment in mandibular free‐end base removable partial dentures ( RPD s). Material and methods Three theoretical test models of unilateral mandibular free‐end base RPD s were constructed to represent the base of tooth replacement, as follows: Model 1: first and second molars (M1 and M2); Model 2: second premolar (P2), M1, and M2; and Model 3: first premolar (P1), P2, M1, and M2. The implant support located either at M1 or M2 sites. The occlusal loading was concentrated at each replacement tooth to calculate the stress resultants developed in the RPD models using the free‐body diagrams of shear force and bending moment. Results There was a trend of reduction in the peak shear force and bending moment when the base was supported by implant. However, the degree of reduction varied with the location of implant support. The moment reduced by 76% in Model 1, 58% in Model 2, and 42% in Model 3, when the implant location shifted from M1 to M2 sites. Conclusions The shear forces and bending moments subjected to mandibular free‐end base RPD s were found to decrease with the addition of implant support. However, the impact of implant support varied with the location of implant in this theoretical study.