- 期刊
上顎左上犬齒及第一小臼齒完全錯位矯正－病例報告
Orthodontic Correction of Complete Transposition over Upper Left Maxillary Canine and First Premolar: Case Report
摘要
牙齒錯位是一件少見的牙齒萌發方面的先天性異常、約佔所有人口中的0.4% 1,2、通常牽涉到兩顆以上的恆牙。對於矯正治療方面而言是屬於較為困難的情形。大多數成人矯正牙齒錯位的時候多會選擇將錯位的牙齒保留在錯位的地方、但若早期發現有時候可以在不傷害到錯位牙齒的情況下、矯正其牙齒錯位的問題。判斷的關鍵在於犬齒的牙冠是否仍在小臼齒或側門齒牙根的較高位處。5若可以成功矯正、對於病人齒列的外觀、使用上的功能性都有較好的結果。但惟需特別注意的是矯正後可能伴隨著在犬齒區出現程度不一的牙齦萎縮。本病例為一11歲6個月女性於臨床診斷中發現乳犬齒殘留以及上顎左側犬齒與第一小臼齒完全錯位的不良咬合、因其犬齒尚未萌發、故手術暴露犬齒牙冠後、於高位使用彎折後的局部矯正線牽引犬齒來達到牙齒錯位矯正配合使用OPA-K矯正器的全口固定矯正裝置、經2年4個月治療完成。
關鍵字
無資料並列摘要
Tooth Transpoition” is a rare congenital anomalies in the aspect of tooth eruption .Transposition is a positional anomaly of the teeth which is described as the positional interchange of two adjacent teeth. The prevalence of tooth transposition has been described based on epidemiologic studies of various populations and races. In a sample of 800 Scottish orthodontic patients, transposition was found in 0.38%. The prevalence of 0.4% reported for a population in India. In Swedish, the prevalance was reported by 0.26%. Many studies was made in other country, their prevalance range from 0.13% to 0.51%. This case is a 11 years 6 months old girl who receive orthodontic treatment to correct the complete transposition upper left canine and first premolar. She care the poor appearance over left first premolar a lot due to demineralization. To obtain better occlusal relationship and better esthetic appearance, we choose to correct the transposed teeth.