冠部牙体组织的大面积缺损,不论其为外伤性破折,或是病理性龋蚀,都给治疗和修复带来困难。充填治疗不易达到固位形与抗力形,金嵌体系贵金属临床很少应用。铬镍18-8不锈钢铸造,在技术和设备上有一定要求。并且冠部牙体组织缺损大,因固位困难而影响修复效果,致使该类病牙临床拔除亦属不少。十几年来,我们采用了内层为银嵌体,外为镍铬合金片锤造金属全冠焊接而成的修复体——嵌体冠,对后牙牙体组织较大面积缺损进行修 Large areas of the dental crown defects, whether it is traumatic rupture, or pathological caries, all to the treatment and repair difficulties. Filling treatment is difficult to achieve retention shape and resistance shape, the gold embedded system is rarely used in clinical precious metals. Chromium 18-8 stainless steel casting, there are certain requirements in technology and equipment. And the crown of large dental defects, due to difficult retention and affect the repair effect, resulting in the clinical extraction of such diseases is also a lot of clinical. More than a decade, we used the inner layer of silver inlay, the outer is made of nickel-chromium alloy hammer made of metal crown welding prosthesis - inlay crowns, large area of ​​the back teeth tooth tissue repair