The effects of a corticotomy on space closure by molar protraction using TSADs in patients with missing mandibular first molars

Introduction The purpose of this study was to evaluate the effects of a triangular‐shaped corticotomy on the protraction of second and third molars in patients with missing mandibular first molars. Subjects and Methods The corticotomy and non‐corticotomy groups consisted of sixteen first molars in f...

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Published in:Orthodontics & craniofacial research 2022-05, Vol.25 (2), p.159-167
Main Authors: Park, Jae Hyun, Kim, Kyung Wook, Lee, Nam‐Ki, Ku, Ja Hyeong, Kim, Jaehyun, Kook, Yoon‐Ah, Chou, Alex Hung Kuo, Kim, Yoonji
Format: Article
Language:English
Subjects:
Bicuspid - surgery
Dental roots
Dentition
Humans
inter‐radicular distance
Mandible
Mandible - surgery
missing mandibular first molars
Molar - surgery
molar protraction
Molar, Third - surgery
Molars
Patients
Premolars
Radiography, Panoramic
Teeth
temporary skeletal anchorage devices
triangular‐shaped corticotomy
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Summary:Introduction The purpose of this study was to evaluate the effects of a triangular‐shaped corticotomy on the protraction of second and third molars in patients with missing mandibular first molars. Subjects and Methods The corticotomy and non‐corticotomy groups consisted of sixteen first molars in fifteen patients (28.6 ± 9.4 years) and nineteen first molars in fifteen patients (26.6 ± 8.4 years), respectively. A triangular‐shaped corticotomy was performed between the second premolar and molar. Temporary skeletal anchorage devices (TSADs) were placed between the first and second premolars in both groups. Mandibular dentition variables were measured on the pre and post‐treatment panoramic radiographs and lateral cephalograms. Analysis of covariance was performed. Results The corticotomy group exhibited 2.8 mm more inter‐radicular correction between the second molar to second premolar roots (P 
ISSN:1601-6335
1601-6343
DOI:10.1111/ocr.12519