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(二)下颌连接杆与上颌连接杆比较下颌连接杆较长而狭。因为受到口底的高度、舌系带的位置或下颌隆突的影响,限制了可利用的空间。所以在设计下颌连接杆时既要考虑到连接杆的强度又不能使体积太大,否则病人不易接受。下颌连接杆另一特点是,连接杆和软组织之间常规必需有缓冲,缓冲量的大小取决于下列因素:①下颌连接体的类型。②义齿的支持形式。牙支持式义齿中缓冲量可以小一些,而末端游离缺损的局部义
(B) mandibular connecting rod and the maxillary connecting rod mandibular connecting rod longer and narrow. Due to the height of the mouth, the location of the tongue lacing or the impact of the mandibular protrusion, the available space is limited. Therefore, in the design of the mandibular connecting rod, it is necessary to take into account the strength of the connecting rod can not make the volume too large, otherwise the patient is not easy to accept. Another characteristic of the mandibular connecting rod is that there must be a buffer between the connecting rod and the soft tissue. The amount of the buffer depends on the following factors: ① The type of the mandibular connecting body. ② denture support form. Denture-supported dentures may have a smaller amount of cushioning and a localized loss of distal free-standing denture