You Position: Home > Paper
Treatment effects of magnetic Twin-block appliance for class Ⅱ cases
( views:301, downloads:92 )
- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF STOMATOLOGY
- Issue:
- 9
- DOI:
- 10.3760/j.issn:1002-0098.2007.09.003
- Key Word:
- 错(牙合),安氏Ⅱ类;体层摄影术,X线计算机;下颌骨髁状突;Twin-block矫治器
Abstract： 目的 评价并探讨磁力Twin-block矫治器矫治Ⅱ类错(牙合)的临床疗效和矫治机制,为正畸临床提供参考.方法 对13例替牙列晚期或恒牙列早期的安氏Ⅱ类错(牙合)患者进行磁力Twin-block矫治器矫治,矫治前后拍摄头颅侧位X线片.分别于戴矫治器前1周内(T1)、戴Twin-block矫治器后4个月(T2)、矫治结束后1周内(T3)和矫治结束1年后(T4)对患者的双侧颞下颌关节行螺旋CT扫描和多平面图像重建;对Twin-block矫治前后39项头影测量项目进行配对t检验.结果 11例患者T2期髁突矢状位和副矢状位以及大部分患者其他重建平面图像上均显示髁突后上部有生长改建的双轮廓影像;部分患者T2和T3期图像中出现髁突"分叉"的影像.头影测量显示,与矫治前相比,矫治后Co-Gn增加(5.31±2.10)mm,B-vert.pl增加(3.23±1.39) mm,U1-SN减少(4.73±4.39)°,L1-MP增加(4.65±4.42)°,L6-vert.pl和L6-MP分别增加(4.85±1.18)mm和(2.69±1.48)mm.患者Ⅱ类骨面型改善.结论 磁力Twin-block矫治过程中患者髁突后上部发生明显的骨生长改建;该矫治器对处于生长发育期的Ⅱ类错(牙合)患者有显著的矫治作用.
- [1]左艳萍,王洁,丛斌,等.磁力双牙合垫矫治器早期功能矫治骨性Ⅱ类错牙合的临床研究[J].2003,(1).
- [2]J A, McNamara,R J, Hinton,D L, Hoffman.Histologic analysis of temporomandibular joint adaptation to protrusive function in young adult rhesus monkeys (Macaca mulatta).[J].1982,82(4).
- [3]S, Ruf,H, Pancherz.Temporomandibular joint growth adaptation in Herbst treatment: a prospective magnetic resonance imaging and cephalometric roentgenographic study.[J].1998,20(4).
- [4]徐芸,胡江天,李璞.双阻板磁力矫治器矫治早期Angle Ⅲ类错（牙合）[J].1999,(3).
- [5]W J, Clark.The twin block traction technique.[J].1982,4(2).
- [6]H U, Paulsen,A, Karle,M, Bakke,etc.CT-scanning and radiographic analysis of temporomandibular joints and cephalometric analysis in a case of Herbst treatment in late puberty.[J].1995,17(3).
- [7]Sandler PJ,Lund DI.The effects of Twin Blocks: a prospective controlled study.[J].1998,113(1).
- [8]Ruf S,Pancherz H.Temporomandibular joint remodeling in adolescents and young adults during Herbst treatment: A prospective longitudinal magnetic resonance imaging and cephalometric radiographic investigation.[J].1999,115(6).
- [9]Alexander D. Vardimon,Jeanne J. Stutzmann,Thomas M. Graber,etc.Functional orthopedic magnetic appliance (FOMA) II-Modus operandi[J].1989,95(5).
- [10]C M, Mills,K J, McCulloch.Treatment effects of the twin block appliance: a cephalometric study.[J].1998,114(1).