Premium
Increased Stress Concentration in Prosthesis, Adhesive Cement, and Periodontal Tissue with Zirconia RBFDPs by the Reduced Alveolar Bone Height
Author(s) -
Sukumoda Erika,
Nemoto Reina,
Nozaki Kosuke,
Omori Satoshi,
Noda Michiko,
Sato Miho,
Takita Mina,
Miura Hiroyuki
Publication year - 2021
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.13293
Subject(s) - dental alveolus , periodontal fiber , dentistry , prosthesis , materials science , crown (dentistry) , abutment , incisor , maxillary central incisor , alveolar process , orthodontics , medicine , surgery , structural engineering , engineering
Purpose To investigate the risk of debonding of resin‐bonded fixed dental prosthesis frameworks and the effects on the periodontal tissue in patients with reduced alveolar bone levels. Materials and methods The abutment teeth were the upper central incisor and the canine. Resin‐bonded fixed dental prosthesis framework fabricated using zirconia was set to models with five different alveolar bone levels. A 200‐N load (the maximum clenching force of the anterior teeth) was applied to the center of the pontic to analyze the internal stress on the framework, adhesive cement, and periodontal tissue using finite element analysis. Results The mean maximum principal stress generated in the framework was 25.33 and 29.35 MPa in the models with the normal and the lowest alveolar bone level, respectively. Regarding shear stress on the adhesive cement, stress concentration was observed on the connector side in all models, and it increased on the cervical side of the central incisor as the alveolar bone level decreased. In addition, the mean maximum and minimum principal strains generated on the periodontal ligament of the central incisor and canine tended to increase as alveolar bone loss progressed. Furthermore, the mean maximum principal stress on the cortical bone was the greatest in the model with the most significant bone loss at 5.10 MPa. Conclusions This study suggested that the risk of debonding and periodontal tissue damage might be higher when resin‐bonded fixed dental prosthesis frameworks were used in patients with reduced alveolar bone levels compared to those in a healthy state.