TY - JOUR
T1 - Fractures of hydroxyapatite-coated blade implants connected with natural teeth. A histological study using SEM, light microscopy, and an image processing system
AU - Takeshita, Fumitaka
AU - Matsushita, Yasuyuki
AU - Ayukawa, Yasunori
AU - Suetsugu, Tsuneo
PY - 1996/1/1
Y1 - 1996/1/1
N2 - 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.
AB - 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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U2 - 10.1902/jop.1996.67.2.86
DO - 10.1902/jop.1996.67.2.86
M3 - Article
C2 - 8667141
AN - SCOPUS:0030076087
VL - 67
SP - 86
EP - 92
JO - Journal of Periodontology
JF - Journal of Periodontology
SN - 0022-3492
IS - 2
ER -