Mereani Samer, Alotaibi Amjad, Bokhari Ahmed
King Faisal Hospital, Makkah 24236, Saudi Arabia.
Ministry of Health, P.O. Box: 43488, Al-Madinah 41311, Saudi Arabia.
Case Rep Dent. 2022 Apr 29;2022:9973333. doi: 10.1155/2022/9973333. eCollection 2022.
A change in the location of two permanent teeth within the same quadrant of the dental arch is known as tooth transposition. This article illustrates the nonextraction treatment of a bilaterally complete transposition between maxillary canines and first premolars, using fixed mechanics. Upper and lower preadjusted, edgewise, fixed appliances with MBT prescription (0.022 × 0.028 slot size brackets) were used for the treatment. After providing room for the canine teeth, the piggyback technique was used to bring the right canine to the arch in the position of the first premolar. In the final phase of treatment, both the upper and lower arches had 0.019 × 0.025 stainless steel wire with Class II elastic 4 oz on the right and left sides.
It showed that the maxillary first premolars and canines were favorably aligned into transposed position. The upper right and left premolars occluded with the lower canines in Class I relationship and good intercuspation as well as skeletal and molar Class I relationships were maintained with a pleasant facial profile.
The early diagnosis plays a significant role as much as considering esthetics and function factors in deciding which treatment strategy should be followed. The key to a successful and stable result is substantial treatment planning and careful orthodontic management.
同一牙弓象限内两颗恒牙位置的改变称为牙齿易位。本文阐述了采用固定矫治技术对上颌尖牙与第一前磨牙双侧完全易位进行非拔牙矫治的情况。治疗采用上下预调整的、带方丝弓的、符合MBT处方（槽沟尺寸为0.022×0.028英寸的托槽）的固定矫治器。在为尖牙提供间隙后，采用“背驮”技术将右侧尖牙牵引至牙弓中第一前磨牙的位置。在治疗的最后阶段，上下牙弓均使用0.019×0.025英寸的不锈钢丝，左右两侧均挂4盎司的II类牵引橡皮圈。
结果显示上颌第一前磨牙和尖牙顺利排列至易位后的位置。右上颌和左上颌前磨牙与下颌尖牙呈I类关系咬合，牙尖交错良好，同时维持了骨骼和磨牙I类关系，面部外形美观。
早期诊断以及在决定采用何种治疗策略时考虑美学和功能因素都起着重要作用。获得成功且稳定疗效的关键在于充分的治疗计划和细致的正畸治疗管理。
