Zimmer Bernd, Seifi-Shirvandeh Nasrin
Private Orthodontic Practice, Kassel, Germany.
J Orofac Orthop. 2007 May;68(3):232-44. doi: 10.1007/s00056-007-0651-z.
It was the aim of this investigation to establish whether orthodontic treatment of traumatic deep bites can restore trauma-related gingival recessions in adults.
Forty-one incisor sites with trauma-related recession (group Tr) and 54 trauma-free sites (group NonTr) were diagnosed in the upper palatal or lower buccal regions in twelve adult patients (mean age 38.3 +/- 8.1 years). The 48 antagonistic sites on the buccal aspects of the upper incisors (Ubuc) and 47 sites on the lingual aspects of the lower incisors (L-ling) were also evaluated. Changes in clinical crown lengths achieved during treatment were measured on dental casts, and length changes in recessions were measured on screen projections of magnified intraoral photographs.
The clinical crown lengths (mean: -1.13 +/- 0.97 mm) and recession depths (mean: -2.05 +/- 0.93 mm) decreased significantly (p < 0.001) in the trauma group (Tr). We also observed significant shortening (p < 0.05) of clinical crown lengths in the buccal sites of upper incisors (U-buc) (mean: -0.16 +/- 0.46 mm). All other changes were insignificant.
Orthodontic treatment of traumatic deep bites involving removal of gingival trauma and intrusion of incisor teeth shows great potential in reducing the length of clinical crowns and depth of gingival recessions. In trauma-free buccal sites of upper incisors, intrusion therapy may also improve the gingival marginal contour.
本研究的目的是确定成人创伤性深覆合的正畸治疗能否恢复与创伤相关的牙龈退缩。
在12名成年患者（平均年龄38.3±8.1岁）的上颌腭侧或下颌颊侧区域诊断出41个与创伤相关的切牙部位（Tr组）和54个无创伤部位（NonTr组）。还对上颌切牙颊侧的48个对抗部位（Ubuc）和下颌切牙舌侧的47个部位（L-ling）进行了评估。在石膏模型上测量治疗期间临床冠长度的变化，并在放大的口内照片的屏幕投影上测量退缩的长度变化。
创伤组（Tr）的临床冠长度（平均值：-1.13±0.97mm）和退缩深度（平均值：-2.05±0.93mm）显著降低（p<0.001）。我们还观察到上颌切牙颊侧部位（U-buc）的临床冠长度显著缩短（p<0.05）（平均值：-0.16±0.46mm）。所有其他变化均无统计学意义。
涉及消除牙龈创伤和切牙内收的创伤性深覆合的正畸治疗在减少临床冠长度和牙龈退缩深度方面显示出巨大潜力。在上颌切牙无创伤的颊侧部位，内收治疗也可能改善牙龈边缘轮廓。
