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Published on: January 21, 2020
[Rapid canine distalization through distraction of the periodontal ligament after reducing interseptal bone
Wen-sheng Ma1, Fu-sheng Dong, Gui-yun Ren
1Department of Oral and Maxillofacial Surgery, School of Stomatology, Hebei Medical University, Shijiazhuang 050017, China.
Objective:
To investigate the effect of rapid canine distalization through distraction of the periodontal ligament after reducing interseptal bone resistance.
Methods:
Twenty canines in 11 patients who needed first premolar extractions were involved. A tooth-borne, custom-made distractor was bonded right after the first premolar extraction and the interseptal bone resistance reduction. Three days post-operatively, the distractor was activated 0.1 mm three times a day. Orthodontic models, panoramic radiographs, periapical radiographs, electrical vitality test were assessed pre- and post distraction procedure and 3 months after the completion of the procedure.
Results:
The distraction procedure was completed in 18 to 35 days [mean (25.6 +/- 4.7) days], with the distal displacement of the canines ranging from 3.53 to 8.29 mm [mean (5.56 +/- 1.32) mm]. The canines showed a mean of 12.20 degrees distal tipping and 18.53 degrees rotation. The anchorage teeth showed an average of (0.76 +/- 0.75) mm mesial movement. The mesial contact point of incisors showed a mean of (0.67 +/- 0.55) mm lingual movement. There was no significant root resorption or long-time change on pulp vitality after distraction.
Conclusions:
The canine distalization through distraction of the periodontal ligament after reducing interseptal bone resistance was an effective approach to move canines rapidly.
