Sonnesen Liselotte, Kjaer Inger
Department of Orthodontics, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.
Am J Orthod Dentofacial Orthop. 2008 Feb;133(2):188.e15-20. doi: 10.1016/j.ajodo.2007.07.018.
Cervical column morphology was examined in adult patients with skeletal Class II malocclusion and horizontal maxillary overjet; the findings were compared with cervical column morphology in an adult control group with neutral occlusion and normal craniofacial morphology. This has not previously been investigated.
The overjet group consisted of 34 patients: 28 women (ages, 18-42 years) and 6 men (ages, 18-38 years). Their horizontal overjets ranged from 5.47 to 15.29 mm. The control group consisted of 21 subjects: 15 women (ages, 23-40 years) and 6 men (ages, 25-44 years). A visual assessment of the cervical column was made, and craniofacial dimensions were measured on each subject's profile radiograph.
In the overjet group, 52.9% had fusion of the cervical column, and 5.9% had posterior arch deficiency. Fusions occurred significantly more often in the overjet group compared with the control group (P <.01). Associations were found between fusions of the cervical column and mandibular retrognathia (P <.05), large cranial base angle (P <.05), and large horizontal overjet (P <.05).
The results could provide a new method to phenotypically subdivide skeletal maxillary overjets. This is important for the diagnosis and the correct treatment of these patients.
对患有骨性II类错牙合和水平上颌前突的成年患者的颈椎形态进行了检查；并将结果与具有中性牙合和正常颅面形态的成年对照组的颈椎形态进行了比较。此前尚未对此进行过研究。
前突组由34名患者组成：28名女性（年龄18 - 42岁）和6名男性（年龄18 - 38岁）。他们的水平前突范围为5.47至15.29毫米。对照组由21名受试者组成：15名女性（年龄23 - 40岁）和6名男性（年龄25 - 44岁）。对颈椎进行了视觉评估，并在每位受试者的侧位X线片上测量了颅面尺寸。
在前突组中，52.9%的患者存在颈椎融合，5.9%的患者存在后弓缺损。与对照组相比，前突组中融合的发生率显著更高（P <.01）。发现颈椎融合与下颌后缩（P <.05）、大颅底角（P <.05）和大水平前突（P <.05）之间存在关联。
这些结果可为从表型上对骨性上颌前突进行细分提供一种新方法。这对于这些患者的诊断和正确治疗具有重要意义。
