Evaluation of the effectiveness of the Removable Mandibular Retractor with Slow Maxillary Expansion compared to the Bone-anchored Intermaxillary Traction with Rapid Maxillary Expansion in the Correction of Skeletal class III malocclusion associated with maxillary constriction in growing patients between 12 - 15 years.: A Randomized Controlled Trial

niversiti Sains Malaysia0 个研究点目标入组 42 人开始时间: 2022年2月18日最近更新: 2024年6月3日

适应症

试验速览

暂无简介。

•Inclusion criteria
•(1) Angle’s class III malocclusion
•(2) Anterior crossbite on two teeth or more or an edge-to-edge bite with or without an anterior shift of the mandible during the closure
•(3) Skeletal class III relationship judged clinically and confirmed radiographically (– 4 < ANB < + 1)
•(4) Normal inclination of the lower incisors with an incisor mandibular plane angle (IMPA) not exceeding 100° and not less than 85°
•(5) An indication for maxillary expansion (maxillary constriction)
•(6) Growing patients between 12 and 15 years.
•(7) Permanent dentition
•(8) No craniofacial syndromes or cleft lip and/or palate abnormalities
•(9) Absence of supernumerary teeth or missing teeth except for the third molars
•(10) No previous orthodontic treatment.
•(11) Malaysian patients.

•Exclusion criteria
•(1) Skeletal class III relationship caused predominantly by maxillary deficiency (SNA angle should have been less than 78 with a normal SNB angle)
•(2) Severe skeletal class III resulting primarily from mandibular prognathism (ANB less than – 4° with no functional shift on closure)
•(3) Patients with diseases that prevent the application of mini-implants (e.g., osteoporosis – treated with cortisone and its derivatives- treated with radiation)
•(4) A convergence between the roots of the canine and first premolar assessed radiographically
•(5) Facial asymmetry (more than 2 mm of deviation of the mandibular midline from the facial midline)
•(6) MM angle greater than 35° or SN-MP angle greater than 40°.
•(7) One of the parents is not Malaysian.

发起方

niversiti Sains Malaysia