Sørensen Helle Budtz, Artmann Lone, Larsen Helle Juul, Kjaer Inger
Municipal Dental Service of Arhus, Arhus, Denmark.
Int J Paediatr Dent. 2009 Mar;19(2):108-14. doi: 10.1111/j.1365-263X.2008.00948.x. Epub 2008 Nov 3.
The aetiology of palatally and labially located ectopic maxillary canines is multifactorial. Accordingly, early prediction of this eruptional disturbance is in most cases not possible.
The purpose of this study was to analyse dental deviations in cases with either palatal or labial ectopic canines.
Panoramic and intra-oral radiographs from 50 patients with palatally located (38 females and 12 males) and 19 patients with labially located ectopic canines (11 females and 8 males), aged 10 years, 2 months-18 years, 1 month, were analysed. Dental deviations registered were crown and root malformations, agenesis, and eruption deviations. Registrations were performed in the maxillary incisor field and in the dentition in general.
The study documented that palatally as well as labially located ectopic canines can occur in dentitions without other dental deviations. Dental deviations occurred in approximately two-thirds of all cases, more often in females and in cases with palatally located canines. More than half of the females with palatally located canines had deviations in the maxillary incisors and in the dentition in general.
Dental deviations may be considered a risk factor for maxillary canine ectopia. Early identification of patients at risk and appropriate interceptive treatment may reduce ectopic eruption of maxillary canines.
腭侧和唇侧异位上颌尖牙的病因是多因素的。因此，在大多数情况下，无法对这种萌出障碍进行早期预测。
本研究的目的是分析腭侧或唇侧异位尖牙病例中的牙齿偏差。
分析了50例腭侧异位尖牙患者（38名女性和12名男性）和19例唇侧异位尖牙患者（11名女性和8名男性）的全景片和口内片，患者年龄为10岁2个月至18岁1个月。记录的牙齿偏差包括牙冠和牙根畸形、牙缺失以及萌出偏差。记录在上颌切牙区域和整个牙列中进行。
该研究表明，腭侧和唇侧异位尖牙可出现在没有其他牙齿偏差的牙列中。大约三分之二的病例出现牙齿偏差，在女性以及腭侧异位尖牙的病例中更常见。超过一半的腭侧异位尖牙女性患者在上颌切牙和整个牙列中存在偏差。
牙齿偏差可被视为上颌尖牙异位的一个危险因素。早期识别有风险的患者并进行适当的阻断性治疗可能会减少上颌尖牙的异位萌出。
