牙体牙列缺损美容修复牙体预备方法的临床探讨(1)
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【摘要】目的：为适应基层农村患者惧怕磨牙和不愿接受常规牙体预备的要求，探讨一种微小肩台的全冠牙体预备方法，以减少因预备肩台而磨去较多牙体组织和缩短口内操作时间，减轻患者痛苦。方法：从2001年至2010年的10年时间里，共对490例患者的995颗需做全冠固定修复的基牙使用了微小肩台的牙体预备方法，其中铸造金属冠不预备肩台，金属烤瓷冠只在基牙唇颊面预备小肩台，邻舌面只需形成颈缘浅凹即可。结果：经过1年至10年的回访复察，除有4例烤瓷冠边缘略透金属色，3例烤瓷冠边缘局部瓷裂，其余患者的修复体完好无异，牙髓、牙周及根尖周组织未见异常发生，牙体未发生折裂及龋坏，修复体无破坏及松脱。结论：此种方法比常规肩台式牙体预备更多的保留了牙体硬组织，增强了牙体的抗力和增大了修复体的固位力，缩短了牙体预备的时间，减轻了患者对牙体预备的痛苦和恐惧感。
【关键词】全冠修复；牙体预备；肩台
【中图分类号】R758【文献标识码】B【文章编号】1008-6455(2011)04-0078-02
Discussion about the Shoulderless and Local microshoulder Abutment Tooth Preparation of Full Crown Restoration
Liu Jiandong Liu Manli Zhou Jiahong
【Abstract】Objective:In order to adapt the demand that patients who don’t want to destroy their natural tooth tissue by routine method at basic hospital.To discuss the method that shouldless and local microshoulder abutment tooth preparation of full crown for retaining tissue of tooth and shorting the time of tooth preparation.Methods:995 abutment tooth which from 490 cases have been cured by the method of shouldless and local microshoulder abutment tooth preparation by writer in 10 years from 2001 to 2010.Among the cases ,Swaged metal full crown which formed the line concave the crown edge of dental cervix but not any shoulder preparation.PFM which formed the microshoulder on the labial or buccal surface and the line concave at the proximal or lingual surface in the abutment tooth.Results:By revisiting and observing the above—mentioned 490 cases during one to seven years.The restorations of 483 cases are all in good condition and there are no abnormality in pulp、periodontal and periapical tissue besides four cases which the local edge of porcelain veneer crown appear metallochrome lightly and three cases which appear topical stenopaic at the edge of porcelain veneer crown.There are no dental canies and breaking,therestorations have not been destroyed and moved.Conclusion:Compare the method which mentioned with the routine method can retain more tissue of tooth, accentuate the restention and resisting force of abutment tooth,shorten the time of tooth preparation and reduce the possible nuisance to tooth, gingival and paradentium during the course of abutment tooth preparation which allay patients and relief their trepidation to abutment tooth preparation ......
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