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在临床工作中,常可遇到短根牙、弯根牙、外伤牙折断或龋坏至龈下导致牙根过短。这些都给桩冠修复带来一定困难。若单纯用成品桩或弯制桩作桩冠修复,则固定条件差,抗力作用也不强。桩冠修复后容易脱落。即使作铸造基底桩冠修复,有的由于冠桩根内段过短,固位也不理想。为此,笔者自1984年以来,利用成品桩或弯制桩塑料桩冠加螺纹固位钉修复。这种修复方法,既增加了桩冠的固位,又增强了抗力作用,取得满意的效果。现介绍于下。
In clinical work, often encountered short roots, root bending, traumatic teeth broken or carious to subgingival root cause short roots. These have given the crown restoration some difficulties. If simply using finished pile or bending pile for crown repair, the fixed conditions are poor, the resistance is not strong. Post crown easy to fall off after repair. Even for the casting base post crown repair, and some due to the crown piles within the short section, retention is not satisfactory. To this end, the author since 1984, the use of finished pile or bending pile plastic pile crown plus screw retention nail repair. This method of repair not only increases the retention of the crown, but also enhances the resistance and achieves satisfactory results. Now introduced in the next.