青少年標準咬合之測顱軟組織變化分析

本病例為兩側多顆下顎大臼齒拔除後長期未作贋復處理而造成很多後遺症的殘缺齒列病例。除了造成右上第二小臼齒下墜接觸到右下第二小臼齒齒頸部外，兩側上顎大臼齒也下墜貼至下顎齒槽，而下顎兩側小臼齒也產生向遠心側旋轉及飄移(drift)的現象。在下顎兩側游離端牙弓的錨定準備(anchorage preparation)，是矯正治療上的一大考驗。筆者成功的不以金屬植體(implant)或微型骨釘、骨板(miniscrew、miniplate)等做口內錨定，而利用傳統矯正方法將上顎大臼齒壓入(molar intrusion)後，再用矩形不鏽鋼矯正弧線(rectangular stainless steel archwire)做成向遠心端延長並向舌側U型彎曲的游離端螺旋(helices)，在舌側藉拉power chain及頰側以Ni-Ti coil spring推擠向遠心側，將兩側下顎第二小臼齒作遠心移動成為無牙臼齒區之牙橋支台齒(abutment)，並以瓷牙冠及瓷牙橋完成贋復重建。(J.Taiwan Assoc.Orthod.14(2):53-62,2002)

關鍵字

安格氏一級標準咬合；軟組織；測顱分析；青少年

並列摘要

This is a multilated dentition case with several lower molars missing.Right upper second premolar droppeddown to touch the cervical third of right lower second premolar.And bilateral upper molars dropped down totouch lower edentulous ridge.Four lower second premolars rotated and drifted distally.How to intrude upper molars and prepare the anchorage for drifted lower premolars is a difficult problem fororthodontic treatment.There are several intraoral,stationary anchorage,such as implant,miniscrew,miniplate,canbe chosen.This case use conventional orthodontic treatment to intrude upper molars.Combined with compressedcoil spring buccally and used bilateral rectangular stainless steel archwire with extension U turn free helical endinglingually can pull lower second premolars distally and avoid rotation.These two distalized lower second premolarsthen became abutments for fixed prosthetic bridge successfully in these edentulous molar areas.(J.Taiwan Assoc.Orthod.14(2):53-62,2002)

並列關鍵字

Angle Class 1 Standard ； Soft Tissue ； Cephalometric Analysis ； Preadolescent

國際替代計量

青少年標準咬合之測顱軟組織變化分析

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