Barlow S T, Moore M B, Sherriff M, Ireland A J, Sandy J R
Royal Devon and Exeter Hospital, Exeter, UK.
Eur J Orthod. 2009 Aug;31(4):362-6. doi: 10.1093/ejo/cjn130. Epub 2009 Mar 16.
The aim of this study was to assess the severity of any underlying malocclusion in subjects presenting for treatment of a palatally impacted canine (PIC) using a modification of the Dental Health Component (DHC) of the Index of Treatment Need (MIOTN), which does not factor in the impacted canine. The pre-treatment study models of 54 subjects who had previously undergone surgical exposure of a PIC, followed by fixed appliance orthodontic alignment, were scored independently by two examiners on two occasions using the MIOTN system. Unweighted kappa statistics revealed good intraoperator agreement for the two examiners and a moderate level of interexaminer agreement. Forty-six and 41 per cent of the sample still scored either an MIOTN grade 4 or 5 (i.e. a great or very great need of orthodontic treatment). However, 20 and 25 per cent of the subjects were graded with a MIOTN score of 1 or 2, indicating little or no need for treatment when the PIC was not taken into consideration. This finding emphasizes the importance of early diagnosis of an impacted canine and the need to institute interceptive measures where necessary, as up to 25 per cent of patients might otherwise require no other orthodontic treatment.
本研究的目的是使用治疗需求指数（MIOTN）的口腔健康成分（DHC）的一种改良方法，评估前来治疗腭侧阻生犬齿（PIC）的受试者潜在错牙合畸形的严重程度，该改良方法未将阻生犬齿纳入考量。54名曾接受PIC外科暴露，随后采用固定矫治器进行正畸排齐的受试者的治疗前研究模型，由两名检查者分两次使用MIOTN系统独立评分。非加权kappa统计显示，两名检查者的检查者内一致性良好，检查者间一致性为中等水平。样本中分别有46%和41%的受试者仍被评为MIOTN 4级或5级（即非常需要或极其需要正畸治疗）。然而，20%和25%的受试者被评为MIOTN评分为1或2，这表明在不考虑PIC的情况下，几乎不需要或不需要治疗。这一发现强调了早期诊断阻生犬齿的重要性以及在必要时采取阻断性措施的必要性，因为否则高达25%的患者可能不需要其他正畸治疗。
