The investigation of the stress distribution in abutment teeth for connected crowns

Abstract

Background/purpose With the advancement of an over aging society, the average number of remaining teeth has increased. However, these remaining teeth do not always have sufficient alveolar bone support, and sometimes fabricated connected crowns are applied. This study evaluated the influence of crown material, crown thickness, and alveolar bone resorption on the stress distribution within the abutment teeth of connected crowns. Materials and methods Using structural analysis software, a premolar crown model was fabricated. Three kinds of crown materials, two types of crown thickness, two types of post and core systems, and two levels of alveolar bone were assumed and evaluated for the stress distribution within the abutment teeth. Results The higher material properties crown was, the more stress was concentrated at the marginal area. The composite resin core showed larger stress values around the marginal area, and the metal core showed larger stress values at the tip of the post. Alveolar bone resorption progressed, the marginal area stress value increased. Conclusion The low elastic modulus crown material polyetheretherketone (PEEK) prevented stress concentrations at the marginal area of the crown and dentine, even with alveolar bone resorption. However, the amount of bone resorption has a great influence on the stress distribution around the tip of the post compared to the type of crown material.

PEEK in Fixed Dental Prostheses: Application and Adhesion Improvement

“…Recent FEA modelling for implants with insufficient alveolar bone support has examined connected crowns, which can alleviate the stress concentrations at the margin of the crown and tooth [45]. Notably, PEEK is recommended as a long-term provisional crown material in cases where other auxiliary treatments are planned.…”

Effect of laser engraving on shear bond strength of polyetheretherketone to indirect composite and denture-base resins

“…Additionally, PEEK has garnered increasing interest in the biomedical field owing to its excellent biocompatibility, human bone-like elasticity, low plaque affinity, and minimal allergy-causing potential. 4 , 5 , 6 Furthermore, due to its other desirable properties, such as radiation transparency, PEEK is emerging as a promising substitute for metallic biomedical materials, particularly in dental applications. 7 , 8 Prior research has demonstrated that PEEK has been utilized in dental restorations, including crowns, implant abutments, and removable denture frameworks (such as clasps).…”