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本文旨在研究牙齿的咬合功能与年龄的增长对于牙骨质内的穿通纤维的影响。 材料与方法 选取有咬合功能的人恒牙、无咬合功能的埋伏牙与无对(牙合)的牙齿共80颗。将其牙根的中央部位牙骨质制成切片,电子显微镜观察其超微结构及形态学方面的测量。 结果 ①有咬合功能牙齿的穿通纤维在牙骨质表层和釉牙骨质界处呈斜向走行,纤维间互相平行而有规律排列。牙骨质表层40μm范围内的穿通纤维直径,
The purpose of this paper is to study the effect of occlusal function and age on the penetration of cement in cementum. MATERIALS AND METHODS: Selected permanent teeth with bite function, 80 teeth without occlusal function and no teeth with occlusion. The central part of the root of the tooth made of bone cement, electron microscopy to observe its ultrastructure and morphology measurements. Results ① The penetrating fibers with occlusal function showed an oblique direction at the surface of cementum and enamel cementum, and the fibers were parallel and regularly arranged. Through-fiber diameter in the range of 40 μm of the cementum surface,