Clinical analysis of muscle function intensifier in treatment of 40 patients with maxillary protrusion

doi:10.19439/j.sjos.2018.01.022

Abstract

Abstract: PURPOSE: To investigate the clinical effects of combined muscle functions intensifier and straight wire appliance in the treatment of maxillary protrusion. METHODS: Forty patients with maxillary protrusion were randomly divided into 2 groups (group A and group B). Straight wire appliance and muscle function intensifier were used in group A, while patients in group B received straight wire appliance only. X-ray projection was conducted to measure relative maxillary index (labial inclination of upper or lower incisor, SNB angle, ANB angle, FMA, maxillary plane angle, NA-PA, U1-FH, U1-PP, forward moving distance of U6) before and 6 months after treatment. The efficacy was analyzed and evaluated using SPSS 20.0 software package. RESULTS: After correction, labial inclination of upper or lower incisor, SNB angle, ANB angle, FMA, maxillary plane angle, NA-PA, U1-FH, U1-PP changed significantly in both groups (P<0.05), but patients in group A achieved more incisor adduction and less forward moving distance of U6, with significant difference between the two groups (P<0.05). CONCLUSIONS: Most patients with maxillary protrusion have a bad habit of mouth breathing. Muscle function intensifier is used only at night and can relieve the patient's mouth breathing, speed up the movement of teeth, and reduce the loss of anchorage and ultimately, improve the correction efficiency and clinical effect of patients with maxillary protrusion.

Key words: Muscle function intensifier, Class Ⅱ malocclusion, Maxillary protrusion, Straight wire appliance

CLC Number:

R783.5

XIE Xue-mei, XIE Xing-qian. Clinical analysis of muscle function intensifier in treatment of 40 patients with maxillary protrusion[J]. Shanghai Journal of Stomatology, 2018, 27(1): 96-99.

References

[1] 魏威, 龚仁国, 肖海鹰. 种植支抗非拔牙矫治成人上颌前突畸形的临床研究[J].中国实用医药, 2015, 10(3): 39-40.
[2] 王瑞晨, 李桂珍, 柳春明, 等. 三维头影测量分析法在正颌外科术前测量中的应用[J]. 中国修复重建外科杂志, 2014, 28(7): 873-878.
[3] 刘曙光, 艾伟健, 周会喜, 等. 正颌外科联合正畸治疗骨性Ⅱ类上颌前突畸形[J].广东医学, 2011, 32(22): 2978-2980.
[4] 冯毅. 微型种植体支抗在青少年口腔正畸治疗中的应用[J]. 河北医药, 2013, 35(3): 352-353.
[5] 靳爱萍, 胡晓聪, 黄月燕, 等. 微型种植体支抗在成人口腔正畸中的应用[J]. 美容医学, 2012, 21(6): 1003-1004.
[6] 杨凯, 曾祥龙, 俞梦孙. 口呼吸与鼻呼吸儿童颅面形态差异的研究[J].中华口腔医学杂志, 2002, 37(5): 385-387.
[7] Moyers RE, Riolo ML, Guire KE, et al.Differential diagnosis of ClassⅡmalocclusion. Part1. Facial types associated with ClassⅡmaloc-clusion[J]. Am J Orthod, 1980, 78(5): 477-494.
[8] Mc Namara JA Jr. Components of ClassⅡmalocclusion in children 8-10 years of age[J]. Angle Orthod, 1981, 51(3): 177-202.
[9] Fields HW, Warren DW, Black K, et al.Relationship between vertical dentofacial morphology and respiration in adolescents[J]. Am J Orthod Dentofacial Orthop, 1991, 99(2): 147-154.
[10] Solow B, Siersbaek-Nielsen S, Greve E.Airway adequacy, head posture and craniofacial morphology[J]. Am J Orthod, 1984, 86(3): 214-223.
[11] 傅民魁. 口腔正畸学 [M]. 北京: 人民卫生出版社, 2009: 40.
[12] Leavey A, Zwaigenbaum L, Heavner K, et al.Gestational age at birth and risk of autism spectrum disorders in Alberta, Canada[J]. J Pediatr, 2013, 162(2): 361-368.
[13] Basciftci FA, Uysal T, Büyükerkmen A, et al.The effects of activator treatment on the craniofacial structure of Class II division 1 patients[J]. Eur J Orthod, 2003, 25(1): 87-93.
[14] Doruk C, Sokucu O, Sezere H, et al.Evaluation of nasal airway resistance during rapid maxillary expansion using acoustic rhinometry[J]. Eur J Orthod, 2004, 26(4): 397-401.
[15] McNamara JA Jr, Bookstein FL, Shaughnessy TG. Skeletal and dental changes following functional regulator therapy on class Ⅱ patients[J]. Am J Orthod, 1985, 88(2): 91-110.
[16] Gianelly AA, Brosnan P, Martignoni M.Mandibular length, condyle position and Frankel appliance therapy[J]. Angle Orthod, 1983, 53(2): 131-142.