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Three-dimensional finite element analysis on stress distribution of the mandibular implant-supported cantilever prostheses depending on the designs / 대한치과보철학회지
The Journal of Korean Academy of Prosthodontics ; : 70-81, 2009.
Artículo en Coreano | WPRIM | ID: wpr-44649
ABSTRACT
STATEMENT OF

PROBLEM:

The position and length of cantilever influence on the stress distribution of implants, superstructure and bone. In edentulous mandible, implant-supported cantilever prostheses that based 4 or 6 implants between mental foramens has been attempted. Excessive bite force loaded at cantilever prosthesis causes bone resorption and breakage of superstructure prosthesis around posterior implants. To complement the cantilever length of conventional prosthesis, In 1992, (McCartney) introduced "cantilever - rest - implant" and Malo reported "All-on-Four" in 2003.

PURPOSE:

Analyze and compare the stress distribution of conventional cantilever prostheses with rest implant and Allon-Four(TM) implant prostheses. MATERIAL AND

METHOD:

The external loads (300 N vertically, 75 N horizontally) are applied to first molar area. The stress value, stress distribution and aspect of stress dispersion are analyzed by three-dimensional finite element analysis program, ANSYS ver. 10.0.

RESULTS:

1. The rest implant and "All-on-Four" implant system are superior to conventional cantilever prostheses to reduce stress on the bone and the superstructure around implants. 2. The rest implant was of the greatest advantage to stress distribution on bone, implant and superstructure. 3. With same number of implants, distally tilted implants are preferred to conventional cantilever prostheses for reducing the length of cantilever.
Asunto(s)

Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Prótesis e Implantes / Fuerza de la Mordida / Resorción Ósea / Proteínas del Sistema Complemento / Análisis de Elementos Finitos / Imidazoles / Mandíbula / Diente Molar / Nitrocompuestos Idioma: Coreano Revista: The Journal of Korean Academy of Prosthodontics Año: 2009 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Prótesis e Implantes / Fuerza de la Mordida / Resorción Ósea / Proteínas del Sistema Complemento / Análisis de Elementos Finitos / Imidazoles / Mandíbula / Diente Molar / Nitrocompuestos Idioma: Coreano Revista: The Journal of Korean Academy of Prosthodontics Año: 2009 Tipo del documento: Artículo