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In-vitro development of a temporal abutment screw to protect osseointegration in immediate loaded implants
The Journal of Advanced Prosthodontics ; : 160-165, 2015.
Artigo em Inglês | WPRIM | ID: wpr-144368
ABSTRACT

PURPOSE:

In this study, a temporal abutment fixation screw, designed to fracture in a controlled way upon application of an occlusal force sufficient to produce critical micromotion was developed. The purpose of the screw was to protect the osseointegration of immediate loaded single implants. MATERIALS AND

METHODS:

Seven different screw prototypes were examined by fixing titanium abutments to 112 Mozo-Grau external hexagon implants (MG Osseous(R); Mozo-Grau, S.A., Valladolid, Spain). Fracture strength was tested at 30degrees in two subgroups per screw one under dynamic loading and the other without prior dynamic loading. Dynamic loading was performed in a single-axis chewing simulator using 150,000 load cycles at 50 N. After normal distribution of obtained data was verified by Kolmogorov-Smirnov test, fracture resistance between samples submitted and not submitted to dynamic loading was compared by the use of Student's t-test. Comparison of fracture resistance among different screw designs was performed by the use of one-way analysis of variance. Confidence interval was set at 95%.

RESULTS:

Fractures occurred in all screws, allowing easy retrieval. Screw Prototypes 2, 5 and 6 failed during dynamic loading and exhibited statistically significant differences from the other prototypes.

CONCLUSION:

Prototypes 2, 5 and 6 may offer a useful protective mechanism during occlusal overload in immediate loaded implants.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Titânio / Força de Mordida / Osseointegração / Implantes Dentários para Um Único Dente / Carga Imediata em Implante Dentário / Mastigação Idioma: Inglês Revista: The Journal of Advanced Prosthodontics Ano de publicação: 2015 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Titânio / Força de Mordida / Osseointegração / Implantes Dentários para Um Único Dente / Carga Imediata em Implante Dentário / Mastigação Idioma: Inglês Revista: The Journal of Advanced Prosthodontics Ano de publicação: 2015 Tipo de documento: Artigo