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桩冠的优点是:形态和牙色比较谐调,美观、固位好,异物感少等。但因塑料变色,硬度较差,或因(牙合)力过大,早接触或刷牙不当,外伤,可能磨损出现横沟、牙冠与冠桩分离,冠桩变形折断而患者要求再修复。自1979年4月至1985年4月我科对340例前牙桩冠与冠桩分离,冠面出现横沟及冠桩折断和牙冠变色等的再修复均获得较为满意的效果,介绍如下: 1.桩冠冠桩折断的修复:前牙桩冠冠桩折断共104例,共原因多由于深覆(牙合),超(牙合),外伤,(牙合)力与(牙合)关系及操作技术不当所致,其次
The advantages of pile crown are: form and tooth color more harmonious, beautiful, good retention, less foreign body sensation. However, due to plastic discoloration, poor hardness, or due to (occlusal) force is too large, early contact or brushing improper, trauma, there may be horizontal groove transverse wear, crown and crown separation, crown deformation and fracture patients require repair. From April 1979 to April 1985, our department of 340 cases of anterior teeth post crown and crown separation, the crown appeared transverse groove and crowns broken and crown discoloration and other re-repair were satisfactory results are described below : 1. Crown crown pile fracture repair: anterior crown pile crown fracture a total of 104 cases, a total of more due to deep overbite, occlusal, trauma, (occlusal) force and (occlusion ) Relationship and improper operation of technology, followed