Assessment of Retraction and Intrusion in Class II Division 1 case with and without Corticotomy Procedures – An In Vivo Study
Keywords:
Class II malocclusion; Corticotomy; Modified Burstone Three-piece intrusion arch.Abstract
Background: Time duration is an important concern for the adult who seeks orthodontic treatment. As there is an increased chance of hyalinization and periodontal complications, this makes treatment challenging for them. It necessitates the use of lighter forces, a shorter time, and more precise tooth movements. To overcome these time limitations, various surgical techniques have been developed. One of the earliest surgical possible techniques is orthodontic treatment combined with corticotomy. So, this study was undertaken to evaluate the rate of retraction and intrusion with and without corticotomy in Angle’s Class II division 1 malocclusion patient.
Material and Method: 20 patients with Angles Class II Division 1 malocclusion, aged (18-30) years were selected. They were divided into 2 groups (10 each)- experimental who receive corticotomy procedures and a control group. The rate of retraction and intrusion was measured radiographically.
Result: Rate of retraction in control group (0.8 ± 0.13 mm/month) and in experimental group (1.1 ± 0.13 mm/month).Pre and post-observation mean amount of intrusion for the control group was (27.8 ± 1.48 mm and 26 ± 1.33 mm), whereas for the experimental group was (27.7 ± 2.26 mm and 25.5 ± 2.32 mm) respectively.
Conclusion: Patients with corticotomy showed 1.1 mm/month of the rate of retraction and 2.2 ± 0.42 mm of intrusion of incisors, which was statistically highly significant to the control group with a retraction rate of 0.8 mm/month and intrusion 1.8 ± 0.71 mm
