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Fractures of Hydroxyapatite‐Coated Blade Implants Connected With Natural Teeth. A Histological Study Using SEM, Light Microscopy, and an Image Processing System
Author(s) -
Takeshita Fumitaka,
Matsushita Yasuyuki,
Ayukawa Yasunori,
Suetsugu Tsuneo
Publication year - 1996
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1902/jop.1996.67.2.86
Subject(s) - osseointegration , implant , dentistry , abutment , materials science , mandible (arthropod mouthpart) , scanning electron microscope , medicine , orthodontics , composite material , surgery , biology , civil engineering , botany , engineering , genus
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. J Periodontol 1996;67:86–92 .