The initial tissue change to the immediate orthodontic force following buccal horzontal subapical osteotomy of maxilla.
- Author:
Kwang Jin HONG
1
;
Byoung Keun AHN
Author Information
1. Department of Dentistry, College of Medicine, Hallym University, Korea.
- Publication Type:Original Article
- Keywords:
buccal horizontal subapical osteotomy;
hyalinized zone;
direct bone resorption;
orthognathic surgery
- MeSH:
Animals;
Bicuspid;
Cats;
Hyalin;
Maxilla*;
Orthognathic Surgery;
Osteoclasts;
Osteotomy*;
Root Resorption
- From:Korean Journal of Orthodontics
1995;25(1):101-110
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to observe the tissue response to the orthodontic force applied immediately after buccal horizontal subapical osteotomy of maxilla. Five mongrel cats weighing about 2.5 Kg were used for this experiment. The left upper canine and premolar of each cat served as a experimental side and the right ones as a control side. On the experimental side, a 100gm orthodontic force was applied between the upper canine and premolar immediately after the osteotomy. On the control side, the same orthodontic force was applied without the osteotomy. After 7days, the experimental animals were sacrificed. The results were as follows: 1. In the pressure zones of the experimental group, significant increase of osteoclasts and direct resorption along the alveolar bone surface was observed as compared with those of the control group. 2. In the pressure zones of the experimental group, a less extensive hyalinized zone was observed than those of the control group. 3. In the pressure zones of both group, no root resorption was found. 4. In the tension zones of the experimental group, new bone deposition increased along the alveolar bone surface as compared with those of the control group. In conclusion, the results suggest the possibility that early orthodontic treatment after orthognathic surgery may have some benefits if the stability of the repositioned segment at surgery is secured.
