Department of Prosthodontics, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania;
Rom J Morphol Embryol. 2023 Jul-Sep;64(3):431-436. doi: 10.47162/RJME.64.3.15.
Dental transposition is an anomaly of eruption which is usually seen in the maxilla and rarely in the mandible. The mandibular lateral incisor's transposition with the permanent canine has a prevalence of less than 0.03%. The following case presents an even rarer situation, of a right lateral mandibular incisor that erupted in the place of the first premolar, in transposition with the temporary canine. In the first phase, a series of extractions have been performed, to ensure the necessary free space for moving the lateral incisor closer to its appropriate place, and after that a fixed orthodontic appliance was used. The biomechanics for intra-arch tooth movement was ingenious enough to ensure a perfect alignment of all permanent teeth and a functional Class I canine and molar final occlusion. Early intervention and successful move of the permanent canine in its correct position ensured the functionality of the mandibular movements and a good long-term prognosis.
牙齿错位萌出是一种牙萌出异常，常发生在上颌，下颌罕见。下颌侧切牙与恒尖牙错位萌出的发生率小于 0.03%。以下病例则更为罕见，右侧下颌侧切牙在尖牙的位置错位萌出，取代了第一前磨牙。在第一阶段，进行了一系列拔牙，以确保有足够的自由空间将侧切牙移动到其适当的位置，然后使用固定正畸矫治器。这种用于弓内牙齿移动的生物力学设计非常巧妙，确保了所有恒牙的完美对齐以及功能正常的Ⅰ类尖牙和磨牙最终咬合。早期干预和成功将恒尖牙移动到正确位置，确保了下颌运动的功能和良好的长期预后。
