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后牙是牙列中担负咀嚼功能的主要牙齿，当龋齿或其它牙体的疾病造成牙冠邻面严重缺损时，近中壁或远中壁被破坏，常规修复往往达不到满意的治疗效果．作者采用市售０．９ｍｍ不锈钢丝，并将其锤成扁形或选用０．２ｍｍ钢片，制作 等５种形状的连接体．根据邻面缺损牙的缺损程度和邻牙相应面是否缺损以及缺损的部位选用不同的连接体．作者根据银汞合金硬固后能与不透钢发生化学结合［１］，且受力变形一致、不产生相对滑动、以及在口腔常温内两种材料膨胀系数很小的这些特点，设计了连接体用于牙体的邻 面严重缺损，旨在解决后牙邻面严重缺损充填存在的问题．
Posterior teeth are the main teeth in the dentition to chew, when the dental caries or other dental diseases caused by serious defects in the adjacent surface of the crown, the proximal wall or distal wall is destroyed, the conventional repair often fail to achieve satisfactory therapeutic effect . The author uses a commercially available 0.9mm stainless steel wire, and hammer it into a flat shape or use 0.2mm steel sheet, making 5 kinds of connectors. According to the defect of the defect on the adjacent surface and the corresponding surface of the adjacent tooth, the defect and the site of the defect are selected with different connectors. Based on the fact that the amalgam can be chemically bonded to the non-permeable steel after it is hardened [1] and the stress-strain is consistent and the relative slip does not occur and the expansion coefficients of the two materials in the oral cavity are very small, the connection is designed The body is used for the serious defect of the adjacent face of the tooth and is intended to solve the problem of the filling of the serious defect of the adjacent face of the posterior teeth.