1、活动义齿(活动牙)：活动义齿是利用剩余天然牙或粘膜作为支持，通过卡环固定在剩余天然牙上，同时，利用基托使义齿保持适当的位置行使咀嚼功能，可以自行摘戴的一种修复体，缺失单个牙，多个牙，或全口牙都可采用。现在活牙的基托有塑料托和金属钢托，排的牙齿是塑料牙。
1, removable partial denture (active tooth): denture is the use of remaining natural teeth or mucous membrane as support, fixed on the remaining natural teeth, clasp through at the same time, the use of the proper position of base denture masticatory function, can automatically pick to wear a prosthetic, missing single tooth, a tooth, or full dentition can be used. Now, there are plastic supports and metal supports on the base of the living teeth, and the teeth are plastic teeth. The
2、固定义齿(固定牙)：固定义齿有金属烤瓷牙，金属钢牙，种植牙，都是临床比较广泛应用而又受人们欢迎的一种牙齿缺失的修复体。金属钢牙是用合金材料铸造而成的全冠，它覆盖全部牙冠，对牙冠的保护严密，硬度高，固位力好。由于金属颜色与牙齿不一致，不宜做前牙修复，而适宜后牙修复。最广泛采用的是金属烤瓷牙，它适用于前牙、后牙，可以用于单冠，固定桥修复。烤瓷牙的优点是：强度高，能恢复形态与功能，耐磨性好，色泽美观逼真，表面光滑，不变形，不变色，所以，现在比较广泛应用。
2, fixed partial denture (Gu Dingya): fixed denture with metal porcelain teeth, metal steel teeth, dental implant restoration, is a widely used clinical tooth loss and popular. Is the tooth crown with metal alloy material casting, it covers all the protection of the crown, crown tight, high hardness, good retention. Because the color of the metal is inconsistent with the teeth, it is not suitable to repair the anterior teeth, but suitable for the restoration of the posterior teeth. The most widely used is porcelain fused to metal (PFM). It is suitable for anterior teeth and posterior teeth. It can be used for restoration of single crown and fixed bridge. The advantages of porcelain teeth are: high strength, able to restore shape and function, good wear resistance, beautiful and realistic color, smooth surface, no deformation, no discoloration, so it is now widely used.
依照牙齿缺失的部位，牙齿缺损的形态等采用不同的方法。
According to the location of the missing teeth, the shape of the tooth defect and so on, different methods are adopted. The
（1） 双端固定桥：桥的两端都有固定体，固定体与桥体之间为不动连接。如缺失1只牙齿要镶3只牙，例如：左下5的牙齿缺失，左下4和6的牙齿为固定体与第5的假牙连接成为固定桥，粘固以后是粘固在4和6的牙齿上，4和6这两个牙起了一个桥梁的作用。缺失了多个牙齿也可用同样的方法。
(1) double end fixed bridge: both ends of the bridge have fixed body, and the fixed body and the bridge body are not connected. If 1 teeth are missing, 3 teeth should be inserted, for example, 5 of the lower left teeth are missing, 4 of the lower left teeth and 6 of the teeth are fixed, and fifth of the dentures are connected to become fixed bridges. After cementation, the teeth are glued to 4 and 6 of the teeth, and 4 and 6 of these two teeth play the role of a bridge. Missing multiple teeth can also be done in the same way. The
（2）套冠：就是在牙体外制作一个与制备过的患牙相吻合的套冠粘固在患牙上。例如：牙齿龋病，龋洞越来越大，在治疗时不能一次完成补牙，要作根管治疗后才能补牙，充填材料又难以获得足够的固力位时容易脱落，选择套冠。或前牙缺损，色泽补美观，可备好牙后作烤瓷套冠。
(2) crown: it is made in the teeth in vitro with a prepared tooth with the fit of the crown adhering to the affected teeth. For example: dental caries, caries is more and more big, not in the treatment of a complete filling, to root canal therapy before filling, filling material is difficult to obtain sufficient force is easy to fall off, select the crown. Or anterior tooth defect, color patch appearance, can be prepared after dental porcelain jacket crown. The
（3）桩冠：如外伤碰撞或咬过硬食物造成牙体缺损，经过根管治疗后，用金属桩插入根管内以获得固位的一种全冠修复体，是治疗残根残冠较理想的修复体，但必须先照X光片检查牙根是否可以保存才能用此方法。
(3): post collision or biting hard food such as trauma tooth defect caused after root canal therapy, with a metal pile inserted into the canal in order to obtain the retention of a full crown restoration, is the ideal treatment for residual root and crown, but must first check whether the root X rays to use this method can save. The
（4）种植牙：是利用人工种植材料制成各种形状的骨内种植本，植入到颌骨内或牙槽窝内作为基牙，在其上制作固定桥。此种种植体可以恢复单个牙缺失，也可与另一端的天然牙联合制作固定桥。
(4) dental implant: it is made from artificial planting materials and made into various kinds of bone implants. The implants are implanted into the jaws or alveolar sockets as abutments, and fixed bridges are made on them. This implant can restore the loss of a single tooth, and can also be fixed with a natural tooth at the other end of the bridge. The