Biomechanical responses of endodontically treated tooth implant-supported prosthesis.
BACKGROUND
This study was designed to investigate the biomechanical interactions in endodontically treated tooth implant-supported prosthesis with variations in implant system and load type by using the nonlinear finite element (FE) approach.


METHODS
The computed tomography (CT), micro-CT image process, and computer-aided design systems were integrated to construct the FE models containing 1-, 2-, and 3-piece implants splinted to the second premolar. Realistic interface conditions within the implant system were simulated by using frictional contact elements, and mechanical responses in terms of von Mises stress were computed for all models.


RESULTS
The simulated results indicated that splinting an endodontically treated tooth to a neighbor implant decreased stress values in dentin and post but increased stress of implant and bone. The oblique occlusal forces increased the stress values relative to those of axial analogs. A splinted system with a 2-piece implant increased stress on the bone and decreased stress on the prosthesis compared with that of the 1-piece implant.


CONCLUSIONS
Splints with 1-piece implant prosthesis, without eccentric occlusal contacts, have better mechanical responses than those of 2- or 3-piece implants when connected to an endodontically treated tooth restored with post core and crown.
Wang
Jen-Chyan
JC
Department of Prosthodontics, School of Dentistry, Kaohsiung Medical University, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
Huang
Shao-Fu
SF
Lin
Chun-Li
CL
D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000502:physiology; D001696:Biomechanical Phenomena; D002102:Cadaver; D017076:Computer-Aided Design; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis / Q000379:methods; D020342:Finite Element Analysis; D006801:Humans; D008297:Male; D010516:Periodontal Splints; D019553:Tooth, Nonvital; D055114:X-Ray Microtomography
D015921:Dental Implants