Fractures of hydroxyapatite-coated blade implants connected with natural teeth. A histological study using SEM, light microscopy, and an image processing system.
J Periodontol
; 67(2): 86-92, 1996 Feb.
Article
em En
| MEDLINE
| ID: mdl-8667141
ABSTRACT
A clinical study was conducted of 59 patients treated with 78 hydroxyapatite (HA)-coated blade implants from August 1986. Five implants in 5 patients were broken at the neck portion, and one implant in one patient was removed from the jaw bone. The histological findings around a broken implant which was removed from the mandible are presented. These sections showed good adaptation of the bone to the implant without a fibrous layer. Histomorphometric evaluation of bone-to-implant contact showed 73.5%. The scanning electron microscopy image of the fractured surface revealed a fatigue fracture. The suspected cause of the fracture was stress concentration at the cervix portion, because of excessive mobility or deleterious change of abutment teeth. Consequently, the osseointegration/biointegration implants should not be connected with natural teeth.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dente
/
Implantação de Lâmina
/
Planejamento de Prótese Dentária
/
Durapatita
Tipo de estudo:
Diagnostic_studies
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Periodontol
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Japão