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可摘局部义齿大连接体的铸造精度对于义齿的支持、固位、稳定效果十分关键。而支架蜡型在铸造前的放置时间是在影响铸件适合性的诸多因素中容易被忽视的问题之一。由于牙医与技工工作量不一致,工作地点相距不等,复诊时间安排等原因造成蜡型存放期可能是1d到数周不等。作者旨在研究蜡型在铸造前存放1d、1周、1月等不同时期对于铸件在模型上的适合精度的影响。 材料和方法将牙缺失为Kennedy Ⅱ类1分类的模型复制42个磷酸盐耐火模型,并分为2组;Ⅰ组按中心开放的前后腭板连接体设计制作蜡型;Ⅱ组按中
Removable partial denture Dalian connector casting accuracy denture support, retention, the effect of stability is very crucial. The placement time of the stent wax before casting is one of the problems easily overlooked in many factors affecting the suitability of the casting. Due to the workload of dentists and mechanics are inconsistent, ranging from duty stations, referral schedule and other causes of wax-type storage period may be 1d to several weeks. The purpose of this study was to investigate the effect of waxing on the fit accuracy of castings on the model during different storage periods, such as 1d, 1 week, January before casting. MATERIALS AND METHODS Forty-two phosphate refractory models were duplicated in a model of Kennedy Class II-1 loss of tooth loss and divided into two groups: group I was designed to produce a wax pattern based on anterior and posterior palatal plate connectors with center open;