The effects of maxillary protraction treatment with rapid maxillary expansion for skeletal Class Ⅲ malocclusion

Abstract

Abstract: PURPOSE: This study evaluated the effect of maxillary protraction with rapid maxillary expansion (RME) for adolescent skeletal Class Ⅲ malocclusion cases. The anatomical cranial structures were used to superimpose and establish the reference grid. METHODS: Twenty cases of adolescent skeletal Class Ⅲ malocclusion treated by maxillary protraction were included as the treatment group, another 20 cases of adolescent skeletal Class Ⅲ malocclusion without treatment were used as the control group. Cephalometric analysis according to the reference grid superimposed by the anatomical cranial structures was carried out before and after treatment. The data were statistically analyzed using SPSS 13.0 software package. RESULTS: There was significant increase in maxillary length（Ptm-ANS）(P<0.01).SNA and the maxillary position (A-N) differences were statistically significant (P<0.05) while there was no significant change in maxillary sagittal position (S-Ptm). CONCLUSIONS: It is a feasible approach to assess changes of the hard tissue after orthopedic therapy using the reference grid superimposed by anatomical cranial structures.

Key words: Maxillary protraction, Anatomical cranial structures, Skeletal Class malocclusion

CLC Number:

R783.5

ZHANG Yi-wen, SHEN Gang. The effects of maxillary protraction treatment with rapid maxillary expansion for skeletal Class Ⅲ malocclusion[J]. Shanghai Journal of Stomatology, 2016, 25(3): 327-333.

References

[1] Saadia M, Torres E. Sagittal changes after maxillary protraction with expansion in Class Ⅲ patients in the primary, mixed, and late mixed dentitions: a longitudinal retrospective study [J]. Am J Orthod Dentofacial Orthop, 2000, 117(6): 669-680.
[2] Major PW, El-Badrawy H. Maxillary protraction for early orthopaedic correction of Class Ⅲ malocclusion [J]. Pediatr Dent, 1993, 15(3): 203-207.
[3] 李明,王春玲,何谨等.前方牵引联合快速扩弓矫治不同年龄骨性Ⅲ类错牙合的硬组织变化[J]. 口腔医学, 2006, 26(4): 244-246.
[4] 傅民魁. 口腔正畸专科教程 [M]. 北京: 人民卫生出版社, 2007: 325.
[5] 邓怡, 余兵, 刘欣. 2种方法治疗替牙期前牙反牙合的疗效对比研究 [J]. 昆明医学院学报, 2009, 30(5): 117-119.
[6] Barrett AA, Baccetti T, McNamara JA Jr. Treament effects of the light-force chincup [J]. Am J Orthod Dentofacial Orthop, 2010, 138(4): 468-476.
[7] UCüncüN, Ucem TT, Yüksel S. A comparision of chincup and maxillary protraction appliances in the treatment of skeletal Class Ⅲ malocclusion [J]. Eur J Orthod, 2000, 22(1): 43-51.
[8] 李建华, 杨璞. 前牵引矫治骨性Ⅲ类错牙合的临床应用 [J].四川医学, 2012, 33(8): 1509-1511.
[9] 许天民, Sheldon, Baumrind. 经典的头影测量角度能否反映颌骨突度的实际变化 [J].中华口腔医学杂志, 2001, 36(4): 269-272.
[10] 钟铭.上颌前方牵引治疗青少年骨性反牙合的临床研究 [J].口腔医学, 2005, 24(2): 75-77.
[11] Yavuz I, Halicioglu K, Ceylan I. Face mask therapy effects in two skeletal maturation groups of female subjects with skeletal Class Ⅲ malocclusions [J]. Angle Orthod, 2009, 79(5): 842-848.
[12] McNamara JA Jr. A method of cephalometric evaluation [J]. Am J Orthod, 1984, 86(6): 449-469.
[13] Proffit WR, Fields HW, Sarver DM. Contemporary orthodontics [M].4th Ed. Louis: C.V.Mosby Co., 2007: 88-90.
[14] 傅民魁,田乃学.口腔X线头影测量理论与实践[M].北京: 人民卫生出版社, 1992.
[15] Houston WJ. The analysis of errors in orthodontic measurements [J]. Am J Orthod, 1983, 83(5): 382-390.
[16] De Coster. The familial line: studied by a new line of reference [J]. Eur J Orthod, 2007,29(Suppl 1): 50-55.
[17] Macri V, Athanasiou AE. Sources of error in lateral cephalometry[C]//Athanasiou AE. Orthodontic cephalometry [M]. London: Mosby-Wolfe, 1995:125-40.
[18] Ghafari J, Engel FE, Laster LL. Cephalometric superimposition on the cranial base: a review and a comparison of four methods [J]. Am J Orthod Dentofacial Orthop, 1987, 91(5): 403-413.
[19] Bjerin R. A Comparison between the Frankfort Horizontal and the Sella turcica-nasion line as reference planes in cephalometric analysis [J]. Acta Odontol Scand,1957, 14(4): 1-12.
[20] Marcotte MR. Head posture and dentofacial proportions [J]. Angle Orthod, 1981, 51(3): 208-213.
[21] Chen L, Chen R, Yang Y, et al. The effects of maxillary protraction and its long-term stability-a clinical trial in Chinese adolescents [J].Eur J Orthod, 2012, 34(1): 88-95
[22] Baccetti T, Mcgill JS, Franchi L, et al. Skeletal effects of early treatment of Class Ⅲ malocclusion with maxillary expansion and face-mask therapy [J]. Am J Orthod Dentofacial Orthop, 1998, 113(3): 333-343.
[23] Cozzani G. Extraoral traction and ClassⅢ treatment [J]. Am J Orthod, 1981, 80(6): 638-650.
[24] Ishii H. Experimental study on the effect of the orthopedic appliance to skeletal Class Ⅲ cases with underdeveloped nasomaxillary complex [J]. Nippon Kyosei Shika Gakkai Zasshi,1979,38(2): 187-209.
[25] McNamara JA Jr. An orthopedic approach to the treatment of Class Ⅲ malocclusion in young patients [J]. J Clin Orthod, 1987, 21(9): 598-608.