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本研究通过时光敏复合树脂粘贴４０例离体切牙釉质表面的抗剪切力学试验，测定出４组不同粘接面积标本的剪切粘接力。结果表明：随粘接面积增加，剪切粘接力加大。经计算机回归分析，得出剪切粘接力（ｆ）与牙釉质面积（ｓ）的关系为ｆ＝１０．５５６３＋０．７５６ｓ。为防止Ⅳ类洞光敏复合树脂充填体脱落，应使剪切粘接力大于或等于能力（Ｆ）。由此，本研究根据Ｈａｂｅ＇ｓ上下颌前牙力平均值推出临界粘接面积（Ｓ０）及计算公式。据此公式可得出性别不同、牙位不同，在一定力下用光敏复合树脂修复Ⅳ类洞时所需要的粘接面积也不一样。
In the present study, the shear adhesion of 40 enamel surfaces of incisor incisors was observed by means of time-sensitive composite resin, and the shear adhesion of 4 enamel specimens with different adhesive areas was measured. The results show that as the bonding area increases, the shear bond strength increases. Computer regression analysis showed that the relationship between shear adhesion (f) and enamel area (s) was f = 10.5563 + 0.756s. In order to prevent the fallout of the photo-composite resin filler of the type Ⅳ cavity, the shear adhesive force should be greater than or equal to the capability (F). Therefore, this study based on Habe's maxillary mandibular anterior mean force launched critical adhesion area (S0) and formula. According to this formula can be drawn different gender, different teeth, with a certain force with photosensitive composite resin repair class Ⅳ hole bonding area required is not the same.