Kokich V G, Shapiro P A, Oswald R, Koskinen-Moffett L, Clarren S K
Am J Orthod. 1985 Oct;88(4):303-7. doi: 10.1016/0002-9416(85)90129-0.
It has been recognized that using the maxillary teeth to deliver extraoral force to the maxilla not only results in sutural remodeling but also periodontal remodeling and tooth movement. In patients with severe maxillomandibular malrelationships, the potential for tooth movement often limits the amount and duration of extraoral force and, consequently, affects the success of treatment. This case report describes a technique to intentionally ankylose deciduous teeth in a patient with severe maxillary retrusion. The ankylosed teeth were used as abutments to deliver an anteriorly directed intermittent extraoral force. After 12 months of treatment, the anterior crossbite was nearly corrected. At that point the ankylosed teeth loosened because of root resorption and the treatment was terminated. Cephalometric superimposition demonstrated that the occlusal correction was the result of anterior maxillary movement with little mandibular growth and no movement of the ankylosed teeth. The results suggest that intentionally ankylosed teeth may be used as abutments for extraoral traction in patients with a severe disturbance in maxillary growth.
人们已经认识到，利用上颌牙齿对上颌施加口外力不仅会导致缝合线重塑，还会引起牙周重塑和牙齿移动。在严重上颌下颌关系不调的患者中，牙齿移动的可能性常常限制口外力的大小和持续时间，从而影响治疗的成功率。本病例报告描述了一种在严重上颌后缩患者中故意使乳牙粘连的技术。粘连的牙齿被用作基牙，以施加向前的间歇性口外力。经过12个月的治疗，前牙反合几乎得到矫正。此时，由于牙根吸收，粘连的牙齿松动，治疗终止。头影测量叠加显示，咬合矫正的结果是上颌前部移动，下颌生长很少，粘连的牙齿没有移动。结果表明，在严重上颌生长紊乱的患者中，故意粘连的牙齿可作为口外牵引的基牙。
