The use of miniature implants as orthodontic anchorage in dogs

概要

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In the past decade, there have been many attempts to use implants as anchorage devices. Unfortunately, previous reports limit the use of these implants for anchorage because of their large size. Clinically, in cases such as intrusion of molars are necessary, small implants placed between the roots of teeth would be a great benefit for the orthodontist. The objective of this study was to histomorphometrically (static) analyze the use of miniature implants. A total of 20 miniature implants (1.0×5.0mm ; 8 loaded and 12 control) were placed in the mandible and maxilla of 2 male dogs. The implants were allowed to heal for 16 weeks followed by 8 weeks of 200 g orthodontic force application. The results indicate that clinical rigidity (osseointegration) was achieved by 85% of the miniature implants. Preliminary analysis revealed that the amount of bone contact at the implant-bone interface from microradiographic analysis resulted less rate than those from brightfield microscopic analysis. There were no significant difference between control and force-applied groups. Orthodontic tooth movement occurred in two directions (mesio-distal and intrusion). We concluded that miniature implants successfully resisted the orthodontic load and could be placed in various locations within the alveolar process in both jaws.
日本矯正歯科学会の論文