In this paper, the custom abutment with various gingival morphology was designed by CAD software. The finite element analysis (FEA) and orthogonal experiments design L25 (56) were performed to investigate the influence of main design parameters of custom abutment on biomechanical property of implant system, including gingival height (GH), abutment angle (A), lingual height (LH), buccal height (BH), mesial height (MH) and distal height (DH). Results indicated that GH and A are the most important factors affecting the biomechanical performance of implant system, and LH, BH, MH and DH have less effect than others. The influence of custom abutment design parameters on biomechanical performance of implant system can be analyzed explicitly by the orthogonal experiment method, which offers a new method for estimating the mechanical characteristics of custom abutment.
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