Resh George D
Int J Orthod Milwaukee. 2005 Spring;16(1):29-34.
Early diagnoses and prevention of maxillary cuspid impactions can save much time when treating patients orthodontically. Effective recognition and interception requires initial diagnosis at the dental age of about eight years. When a cuspid bulge is absent, diagnosis with oriented lateral and frontal radiographs is advocated and has been shown to aid in the positive recognition of lingually positioned unerupted maxillary cuspids at risk for impaction. Recommended treatment is early removal of maxillary deciduous cuspids and perhaps deciduous first premolars. Lateral and frontal radiographs should be taken at six-month intervals to follow the intra-bony eruptive movement of the permanent cuspids until they have entered the oral cavity. Failure to diagnose and intercept the potentially impacted cuspid often leads to serious malpositions that require extensive mechanical therapy for proper alignment and good function.
早期诊断和预防上颌尖牙阻生在对患者进行正畸治疗时可节省大量时间。有效的识别和干预需要在大约8岁的牙龄时进行初步诊断。当没有尖牙隆起时，提倡使用定向侧位和正位X线片进行诊断，并且已证明这有助于对上颌舌侧未萌出且有阻生风险的尖牙进行阳性识别。推荐的治疗方法是早期拔除上颌乳尖牙，或许还需拔除乳第一前磨牙。应每隔6个月拍摄侧位和正位X线片，以跟踪恒牙尖牙在骨内的萌出移动，直到它们进入口腔。未能诊断和干预潜在阻生的尖牙通常会导致严重的错位，这需要进行广泛的机械治疗以实现正确排齐和良好功能。
