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作者利用近两年来发展的一种紫外线聚合树脂(Nuva-Fil),把丙烯酸桥体和真牙粘合,然后测定破坏这样一种固定桥的完整性所需要力量的大小。作者制做了24个上颌中切牙至尖牙的试验桥,基牙用浮石和橡皮怀擦干净,和桥体连接的区域用50%磷酸腐蚀2分钟,然后彻底洗净并干燥,涂一薄层活化剂Nuva-Seal,唇舌侧各用紫外线聚合30秒钟。选一个合适的Bioblend塑胶牙,并使之和缺隙相适应。桥体用557钻磨一个机械固位沟,把活化的Nuva-Fil放进固位沟,放入预先安
Using a Nuva-Fil, an ultraviolet polymeric resin developed over the past two years, the authors bonded the acrylic bridges to the true teeth and then determined the amount of force required to break the integrity of such a fixed bridge. The author made 24 maxillary central incisor to canine test bridge, abutment with pumice and eraser wipe clean, and the bridge connected area with 50% phosphoric acid corrosion for 2 minutes, and then thoroughly washed and dried, coated with a Nuva-Seal, a thin layer of activator, was used to polymerize with ultraviolet light for 30 seconds each. Pick a suitable Bioblend plastic tooth and adapt it to the gap. Bridge with 557 drill a mechanical retention groove, the activated Nuva-Fil into the retention groove, into the pre-safety