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在某些症例,可用酸蚀法固定义齿来代替常规的固定义齿或活动义齿。据报导树脂桥体或天然牙桥体可用复合树脂材料粘在基牙上,而毋须做基牙的机械预备。由于操作技术及义齿在口内部位的不同,固定义齿的寿命差异很大,可以从数天到不定期。Guyton等提出人类切牙区的咬(牙合)力为24～55磅。据报导酸蚀法前牙固定义齿的固位力平均为48.6磅。本文对增强固定义齿固位力的三种设计方法进行了评价。材料和方法:制做18个上颌中切牙到尖牙的固定义齿。将所拔除的牙齿放置在长方形的硅酮模型上,使两牙之间间隔6毫米,
In some cases, the denture can be fixed by acid etching instead of the conventional fixed or movable denture. It has been reported that resin bridges or natural bridges can be bonded to the abutments with a composite resin material without the need for mechanical preparation of the abutments. Due to different operating techniques and dentures in the mouth position, the life of fixed dentures vary widely, from a few days to irregular. Guyton et al. Proposed a bite force of 24 to 55 pounds in a human incisor area. The retention force of the anterior teeth denture on anastomosed teeth reportedly averaged 48.6 pounds. In this paper, three design methods to enhance the retention of fixed denture were evaluated. Materials and Methods: Make 18 maxillary central incisors to canine fixed dentures. Place the extracted tooth on the rectangular silicone model so that the distance between the two teeth is 6 mm,