CANINE SUBSTITUTION FOR UPPER CENTRAL INCISOR IN A CASE OF UPPER ANTERIOR TEETH IMPACTION

上顎多顆前牙同時發生阻生和錯位在臨床上並不尋常且對於牙科醫療行為具有相當大的挑戰。前牙埋伏齒若能早期診斷並拔除便可提升其美觀和咬合功能。這個案例報告描述一位18歲女性患者仍存有上顎左右乳犬齒並同時具有兩側犬齒和右側正中門齒皆為彎曲唇側阻生齒。患者兩側乳犬齒、右側正中門齒和左側犬齒被拔除，其右側犬齒則取代成正中門齒、兩側第一小臼齒取代成犬齒。右側犬齒經過手術暴露並使用雙弓線技術引導至正中門齒的位置。經過三十個月的治療，右側犬齒成功取代成正中門齒。治療後咬合功能良好，患者對於微笑曲線的重建相當滿意。此病例報告闡述關於犬齒的替代治療原則、生物力學設計和美觀考量。

關鍵字

彎曲阻生齒；犬齒替代；犬齒錯位；雙弓線技術

並列摘要

Concurrent impaction and transposition of the maxillary anterior teeth is unusual and may present a great challenge to dental practice. Early diagnosis and elimination of impacted anterior teeth helps provide esthetic and functional outcomes. This case report describes an 18-year-old female whose teeth 13, 11 and 23 (FDI tooth numbering) had dilacerated labial impaction. Teeth 53 and 63 were retained primary teeth. The patient was treated with extraction of teeth 53, 11, 23 and 63, and substitution of teeth 13 for 11, 14 for 13, and 24 for 23. Surgical exposure of tooth 13 was done to tract the impaction with double archwire technique into position 11. After 30 months of treatment, tooth 13 was successfully substituted for 11. Final occlusion was good, a pleasing smile arc was established and the patient was satisfied. This paper discusses principles of treating impaction, treatment mechanics and esthetic concerns relating to canine substitution.

並列關鍵字

Dilacerated impaction ； Canine substitution ； Canine transposition ； Double archwire technique

國際替代計量

CANINE SUBSTITUTION FOR UPPER CENTRAL INCISOR IN A CASE OF UPPER ANTERIOR TEETH IMPACTION

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