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題 名 | A Segmented T Spring for Canine Retraction--Case Report=局部T型彈力線的犬齒後拉--病例報告 |
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作 者 | 張心涪; 謝雯慧; 陳羿貞; 姚宗珍; 陳坤智; | 書刊名 | 中華牙醫學雜誌 |
卷 期 | 20:2 2001.06[民90.06] |
頁 次 | 頁131-139 |
分類號 | 416.97 |
關鍵詞 | 犬齒異位; 局部T字型後拉彈力線; Canine malposition; Segmented T-loop retraction spring; |
語 文 | 英文(English) |
中文摘要 | 有關上顎犬齒異位萌發的病例,在臨床診察中實為多見。而治療方法也因牙齒錯位的嚴重程度及異常咬合的結果有所不同對於犬齒後拉矯正法的考量,不外乎兩種途徑;滑動機制和拉縮環線機制無論使用哪一種方法,都必須謹慎處理可能的後患。本次病例報告描述以局部 T 字型拉縮環線,有效地運用於一位 11 歲的女孩,上顎左側異位萌發犬齒後拉的過程。治療時間,藉由調整局部後拉彈力線的不同部位,不僅能夠在不同的治療階段釋放出適當而較持續性的力量,同時對於牙齒移動時,三度空間的控制,也有不錯的效果。除此之外,應用連續弧線作牙齒位移時,因為產生於位移牙齒與鄰接牙齒之間的作用力與反作用力,所造成的不良影響,也因局部後拉彈力線是獨立於主要弧線外,而降低對鄰接牙的副作用。同時,後牙錨定準備,在本病例則是以上顎連續矯正主線及跨顎弧線作錨定的加強。治療結果顯示異位齒的控制情形良好,且無明顯的牙齦退縮及錨定喪失。移除矯正支架後,立即以局部舌側黏著式維持器來預防復發。 |
英文摘要 | Ectopic eruption of maxillary canines is not uncommon. Many treatment possibilities have been considered for this problem. However, treatment methods vary greatly with the severity of tooth malposition and consequent malocclusion. Two approaches have been developed for canine retraction: Sliding mechanisms and loop mechanisms. Regradless of which technique is used, the possible sequelae must be handled with great care. In the presented case of an 11-year-old girl with upper left ectopic canine, we described the effective adjustment of a segmented T-loop retraction spring in different demand to deliver a relatively continuous light force of suitable duration, in conjunction with a continuous heavy arch wire and tyranspalatal bar as a reinforced anchor unit to reposition an ectopic canine in 23 weeks. The results hsowed a considerably well control of ectopic tooth without marked gingival recession and anchorage loss. A lingual bonded retainer was placed as soon as dedonding and debanding to prevent future relapse. |
本系統中英文摘要資訊取自各篇刊載內容。