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Influence of implant-abutment connection mode on stress distribution in peri-implant bone / 中华口腔医学杂志
Chinese Journal of Stomatology ; (12): 50-53, 2008.
Artículo en Chino | WPRIM | ID: wpr-359639
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the influence of butt joint connection and platform switching design of implant-abutment connection on the stress distribution in peri-implant bone.</p><p><b>METHODS</b>Three-dimensional finite element models of implant-supported mandibular first molar with different implant-abutment connections were computed by COSMOSM 2.85. Traditional butt joint connection was used in model A and platform switching design in model B. Loading conditions were a vertical load of 200 N and inclined load of the same magnitude at 45 degrees to the vertical axis of the implant. Stress distribution in peri-implant bone and von Mises stresses at the same point of buccal and lingual implant-bone interfaces in two models were compared.</p><p><b>RESULTS</b>Stresses concentrated in peri-implant cortical bone at the neck of implants on the buccal and lingual sides; maximum von Mises stresses under inclined load were higher than those under vertical load. Maximum von Mises stress in bone was 11.61 MPa in model A and 7.15 MPa in model B under vertical load, and 22.07 MPa in model A and 11.87 MPa in model B under inclined load respectively. Von Mises stresses decreased as the distance from implant-abutment junction increased and the most obvious change occurred at the interface between cortical bone and spongy bone. Von Mises stresses at the same points of buccal and lingual implant-bone interfaces in model A were higher than those in model B.</p><p><b>CONCLUSIONS</b>Compared with butt joint connection, platform switching design improved the stress distribution and decreased the maximum stresses in peri-implant bone around implant cervix.</p>
Asunto(s)
Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Fisiología / Estrés Mecánico / Huesos / Implantes Dentales / Pilares Dentales / Análisis de Elementos Finitos / Implantación Dental / Modelos Biológicos Idioma: Chino Revista: Chinese Journal of Stomatology Año: 2008 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Fisiología / Estrés Mecánico / Huesos / Implantes Dentales / Pilares Dentales / Análisis de Elementos Finitos / Implantación Dental / Modelos Biológicos Idioma: Chino Revista: Chinese Journal of Stomatology Año: 2008 Tipo del documento: Artículo