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三、牙体制备: 牙体制备的目的,主要形成有足够的修复体间隙,并获得良好的固位形态。在牙体制备过程中,要保护牙髓,操作轻快,减少病员的痛苦。因而在牙体制备之前,必须仔细地检查牙体和牙周情况,以及(牙合)关系等,采用何种类型的金属烤瓷修复体,并制定具体的制作计划。现将金属烤瓷修复体的牙体制备特点介绍如下: 1.牙体制备基本原则: (1)牙体制备的厚度:前牙的切端和后牙的(牙合)面牙体制备厚度为2毫米。唇(颊)
Third, the preparation of the tooth: the purpose of tooth preparation, the main formation of adequate repair clearance, and get a good retention form. In the tooth preparation process, to protect the dental pulp, light operation, reduce the suffering of patients. Therefore, before tooth preparation, it is necessary to carefully examine the dental and periodontal conditions, and (occlusal) relationship, what kind of metal porcelain restoration, and to develop a specific production plan. Now the characteristics of the preparation of metal porcelain restoration tooth body introduced as follows: 1. The basic principles of tooth preparation: (1) the thickness of the tooth preparation: the incisor of the anterior teeth and posterior teeth (occlusal) face tooth preparation thickness 2 mm. Lip (cheek)