The effects of ion beam-assisted deposition of hydroxyapatite on the grit-blasted surface of endosseous implants in rabbit tibiae.
OBJECTIVE
This study was undertaken to evaluate ion beam-assisted deposition (IBAD) of hydroxyapatite (HA) on the grit-blasted surface of endosseous dental implants 6 weeks postplacement.


METHODS
A total of 40 implants was placed in the tibiae of 10 New Zealand white rabbits. Twenty implants were grit-blasted only and the other 20 were grit-blasted and coated with HA by the IBAD method. After 6 weeks of healing, the rabbits were sacrificed and removal torque tests, histomorphometry, and morphometric analysis of microtomographic images were performed.


RESULTS
The HA-coated group showed significantly higher removal torque, bone-to-implant contact, and bone volume than the other group.


CONCLUSIONS
In a previous study, the authors suggested that HA coating deposited on a machined surface by the IBAD method showed results comparable to or more favorable than the results obtained with a blasted surface. This study indicated that the HA coating produced by the IBAD method was also very effective on the aluminum oxide-blasted surface, as demonstrated by the early formation of osseointegration. Morphometric analysis by microtomography showed some promise in measuring the osseointegration rate. (More than 50 references.)
Park
Young-Seok
YS
Department of Oral Anatomy, College of Dentistry, Seoul National University, Seoul, Korea.
Yi
Ki-Young
KY
Lee
In-Seop
IS
Han
Chong-Hyun
CH
Jung
Young-Chul
YC
D000818:Animals; D015519:Bone Density; D020099:Coated Materials, Biocompatible; D045662:Dental Etching; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D020878:Device Removal; D017886:Durapatite / Q000494:pharmacology; D005260:Female; D020007:Implants, Experimental; D007477:Ions; D008852:Microradiography; D016348:Osseointegration / Q000187:drug effects; D011817:Rabbits; D013499:Surface Properties; D013977:Tibia; D014025:Titanium; D019415:Torque
D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D007477:Ions; D017886:Durapatite; D014025:Titanium