The effects of modified maxillary protraction on the soft tissue profile of patients with maxillary hypoplasia during the later period of pubertal peak
10.3969/j.issn.1001-3733.2024.03.010
- VernacularTitle:改良上颌前方牵引对生长发育高峰后期上颌发育不足患者软组织侧貌的影响
- Author:
Sunxin ZHOU
1
;
Na HUO
;
Shuaichen LI
;
Tianqi LI
;
Xiangbo MENG
;
Hengxin WANG
;
Tong ZHANG
Author Information
1. 100853 北京,解放军总医院第一医学中心口腔科,解放军医学院
- Keywords:
Maxillary protraction;
Maxillary hypoplasia;
Soft tissue profile;
Cephalometric analysis
- From:
Journal of Practical Stomatology
2024;40(3):365-370
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the effects of modified maxillary protraction therapy on the changes in facial soft tissue in patients with maxillary hypoplasia using cephalometric measurements.Methods:26 cases(16 males and 10 females)of Class Ⅲ skeletal malocclu-sion with maxillary hypoplasia during the later period of pubertal peak(CVM Ⅴ to Ⅵ)were included.Treatment was carried out using modified palatal anchorage with a combination of a modified bite-jumping appliance and bilateral maxillary anterior traction.Cephalo-metric measurements were taken before and after treatment using lateral cephalograms,the changes in facial soft tissue-related parame-ters were compared.Results:(1)After treatment,the measurements of soft tissue landmarks in the midfacial region showed a signifi-cant increase(P＜0.05),with the average anterior movement exceeding 3 mm for the nasal tip,subnasale,soft tissue A point and upper lip protrusion point.(2)The changes in the G-Sn-Pos,Ns-Prn-Pos,and S-Ns-Sn were highly significant(P＜0.01),with an average increase in the G-Sn-Pos of 3.23°±3.74°,a decrease in Ns-Prn-Pos of 2.56°±4.99°,and an average increase in S-Ns-Sn of 2.63° ±3.39°.(3)Changes in soft tissue tension and facial height proportion after treatment were not statistically significant(P＞0.05).Con-clusion:The use of a modified pad type intraoral appliance in conjunction with bilateral maxillary anterior traction can effectively pro-mote the improvement of mid facial soft tissue profile in patients with maxillary underdevelopment during the peak growth and develop-ment period,and coordinate the relationship between nasal,lip and chin soft tissue.
