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KMID : 0362819940140010001
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Journal of the Korean Academy of Implant Dentistry
1994 Volume.14 No. 1 p.1 ~ p.20
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A STUDY ON THE BONE FORMATION OF OPEN TYPE AND CLOSED TYPE IMPLANTS
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Kim Jeong-Ho
Yang Jae-Ho
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Abstract
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A tw o-stage procedure is ideal for getting a successful osseointegration. B ut if a one-stage procedure can achieve a sim ilar osseointegration, the one-stage procedure has several advantages. The purpose of this study was to observe the initial bone formation and bone remodeling of open type (nonsubmerged) and closed type (submerged) titanium implants. E ig h t IT I hollow-screws and eight Branemark fixtures were divided into two groups (submerged and nonsubmerged) and were installed on the lower jaws of four mongrel dogs. The anim als were sacrificed three m onths later and bone sections with implants were processed for light microscopic and fluorescent microscopic observation. The results were as follows: 1. There was no significant difference in bone-to-implant contact between submerged and nonsubmerged implants. 2. Smooth surface titanium im plants showed more bone-to-implant contact than that of titanium plasma coated im plants histologically. 3. Under fluorescent microscopy, the active bone remodeling and new bone form ation were observed in the interface zone. 4. Under fluorescent microscopy, submerged and nonsubmerged implants had no difference in bone remodeling pattern, and intra membranous bone form ation was more prominent. 5. The connective tissue fibers orienting perpendicularly toward im plant surface were oberved in the neck of implants.
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KEYWORD
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ITI implant, one-stage procedure, submerged implants, nonsubmerged implants, osseointegration
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