Study on electrical measurement stress analysis of root attachment overdenture of three different mecha⁃ nisams

Abstract

Objective To analyze the stress difference of alveolar bone around the abutment and alveolar ridge of edentulous of three different kinds of root⁃attachment⁃supported overdenture under different load conditions, in order to provide a reference for the choice of clinical root attachment. Methods The occlusal force of overdenture was simulat⁃ ed by electrical resistance strain measurement in vitro. The stress of the alveolar bone, the central part of the mandibu⁃ lar arch and the first molar correspond to the alveolar ridge were measured. The stress difference of 3 kinds of attach⁃ ment overdenture under different loading conditions were compared and analyzed. Results Under the same loading condition, all three kinds of overdentures had a certain degree of slip of the denture (magnetic attachment denture) or ro⁃ tation (3 kinds of attachment dentures). The abutment neck in different parts of the dental arch and alveolar bone, anteri⁃ or free end edentulous alveolar ridge stress distribution was significantly different. Conclusion ERA attachment over⁃ denture was the most preferable, followed by the magnetic attachment overdenture. Suitable attachment should be select⁃ ed based on specific clinical cases.

Keywords

• Ball⁃cap attachment
• Magnetic attachment
• ERA attachment
• Overdenture
• Electrometric stress analysis