Single-crystal sapphire endosseous dental implant loaded with functional stress--clinical and histological evaluation of peri-implant tissues.
Peri-implant tissues of the single-crystal sapphire implant connected with neighbouring teeth by a metal bridge-work were examined clinically, radiographically, and histologically in ten monkeys. Professional tooth cleaning was performed during the study. At 3-12 months after insertion, most of the implants were firmly connected to the surrounding tissues and peri-implant gingiva was regarded as healthy, based on various periodontal parameter scores. Destructive changes of the peri-implant bone were not found radiographically. Histologically, peri-implant gingiva was revealed to show similar structure to that of the gingiva around natural teeth. Direct bone-implant interface was observed at 3 months after insertion, while a thin loose fibrous connective tissue layer was present between bone and implant at 6 and 12 months. Such different interrelationship between bone and implant might be attributable to the difference in distribution of functional stress.
Hashimoto
M
M
Department of Removable Prosthodontics, Hiroshima University School of Dentistry, Japan.
Akagawa
Y
Y
Nikai
H
H
Tsuru
H
H
D000535:Aluminum; D000537:Aluminum Oxide; D000539:Alveolar Process / Q000033:anatomy & histology* / Q000502:physiology; D000818:Animals; D003238:Connective Tissue / Q000033:anatomy & histology; D003461:Crystallography; D003758:Dental Implantation, Endosseous / Q000295:instrumentation*; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D004846:Epithelial Attachment / Q000033:anatomy & histology; D005260:Female; D005881:Gingiva / Q000033:anatomy & histology* / Q000502:physiology; D008251:Macaca; D008409:Mastication; D010512:Periodontal Index
C050798:cerestore; D000535:Aluminum; D000537:Aluminum Oxide