NGHIÊN CỨU HIỆU QUẢ ĐIỀU TRỊ KHÔNG PHẪU THUẬT SAI HÌNH XƯƠNG HẠNG III PHỨC TẠP BẰNG PHƯƠNG PHÁP MEAW CẢI TIẾN

Abstract

Objectives: Evaluate the effectiveness of innovated MEAW technique in the non-surgical treatment of severe skeletal class III patients. Methods: Clinical Quasi-exprimental study was carried out on 31 severe skeletal class III patients treated with innovated MEAW technique. Research data included: extra and intra oral photos, study models, lateral and frontal cephalometric xrays. The photos were scored by 2 groups of observers (lay persons and professionals) using NRS scale, the study models were analysed and scored following the ABO standards, cephalometric analysis of Ricketts, Arnett and Sato were used to evaluate the cranio-facial characteristics. The data before and after treatment were compared statistically. Results: The study showed the effectiveness of the innovated MEAW technique in the treatment of severe skeletal class III cases: improve facial aesthetic from ugly-acceptable to normal-harmonious level, reestablish good occlusion according to ABO standards, reduce the bone base disharmony by creating a backward and clockwise rotation of the mandible and by causing the changes of maxillary bone base through cranio-facial dynamics and orthodontic mechanics aimed at A point, move forward the upper incisors, upright and move backward the lower incisors, improve the protrusion of the lips and chin to the True vertical line, balance the horizontal occlusal plane to reduce the mandibular lateral deviation.