A study on the vertical augmentation of the alveolar ridge by distraction osteogenesis in dogs.
- Author:
Joo Ho LEE
1
;
Ju Hwan LIM
;
In Ho CHO
Author Information
1. Department of Prosthodontics, College of Dentistry, Dankook University, Korea. cho8511@dku.edu
- Publication Type:Original Article
- Keywords:
Distraction Osteogenesis;
Bone formation
- MeSH:
Alveolar Process*;
Animals;
Copper;
Dental Implants;
Dogs*;
Latency Period (Psychology);
Mandible;
Maxilla;
Osteogenesis;
Osteogenesis, Distraction*;
Titanium
- From:The Journal of Korean Academy of Prosthodontics
2007;45(1):107-118
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
STATEMENT OF PROBLEM: Implant-type distractor uses a removable distraction device that has an appearance similar to that of a dental implant and utilizes many of the same techniques for placement as are used for dental implants. MATERIAL AND METHOD: In this study, 48 implant type titanium distractors were inserted into the osteotomized alveolar bone of 12 beagle dogs. After a 7-day latency period, the alveolar bone was augmented by 5mm vertically at a rate of 1.0 mm/day. The dogs were sacrificed after 4weeks, 8weeks and 12 weeks for radiographic, histologic, and histomorphometric analysis. RESULTS: Copper equivalent value showed significant difference between 4 weeks and the other weeks(8, 12 weeks)(p<0.05). But there was no significant difference between maxillary and mandibular groups. In the bone to metal contact analysis, there was a significant difference between 4 weeks and 12 weeks(p<0.05). On the contrary, there was no significant difference between maxilla and mandible. The bone area showed significantly higher values in 12 weeks compared to 4 weeks(p<0.05). Histologically mineralization began at the host bone margins. At 12 weeks, increasing accumulation of Ca++ element was confirmed. CONCLUSION: From the results above, the new bone formation was increased according to consolidation period. Especially there was significant difference between 4 weeks and 12 weeks(p<0.05). Implant type distractors used in this study to augment vertical ridge defect may prove to be a clinically useful treatment option in selected cases.
