The Root Length Changes after Protraction of Mandibular Molars Combined with Corticotomy Assisted by Bone Grafting: 5 Year CBCT Follow-Up
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Abstract
The aim of this study was to determine root length changes following mandibular second molar protraction into a first molar space after corticotomy and bone grafting. The protraction of mandibular second molars into atrophic edentulous spaces were conducted in 16 patients with a mean age at initial treatment of 25.69 years old. The corticotomy and bone grafting were completed before second molar tooth movement. The root length changes of the mesial root of the mandibular second molar were measured by cone beam computed tomography (CBCT) at initial treatment (T0), 3 months after space closure (T1), and 5 years post-treatment (T2). The paired t-test was used to analyze the mean difference between time points. The root length significantly decreased at all time points. Average root resorption at T0 to T1, T1 to T2, and T0 to T2 were 0.16, 0.67 and 0.84 mm, respectively. In conclusion, there was minor root length loss after molar protraction into an atrophic edentulous space after a corticotomy and bone grafting. Root resorption after the 5 years follow-up period was statistically higher than the protraction period.
Article Details
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการลงตีพิมพ์ในวิทยาสารทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นถือเป็นลิขสิทธิ์เฉพาะของคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่น หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษร จากคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นก่อนเท่านั้น
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