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根吸收是由于牙周韧带内的多核破骨细胞活动造成的。正常情况下,成骨细胞和破骨细胞的活性处于一种动力学平衡状态,从而维持牙根和周围骨组织的生理健康。如果这种平衡破坏,牙骨质和牙本质被除去,就会造成根外吸收。根外吸收可发生于根面的任何部位,这一点与根内吸收不同,后者吸收始于邻近牙髓组织的部位。以下主要讨论的是多发性根外吸收发生的原因。生理吸收:吸收主要发生于乳牙,而且常常是在恒牙萌出以前。从 X 线片上很容易识别,吸收的牙根与
Root absorption is due to the activity of multinucleated osteoclasts within the periodontal ligament. Normally, the activity of osteoblasts and osteoclasts is in a state of kinetic equilibrium that maintains the physiological health of the root and surrounding bone tissue. If this balance breaks down, the cementum and dentin are removed, which can cause extracorporeal absorption. Extracorporeal absorption occurs at any part of the root surface, unlike absorption within the root, which absorbs from the site adjacent to pulp tissue. The following is the main discussion of multiple extra-corporeal absorption occurs. Physiological absorption: Absorption occurs mainly in deciduous teeth and is often preceded by eruption of permanent teeth. From the X-ray film is very easy to identify, absorb the roots and