用3月～4月龄的40只猫,拔除下颌右侧第2及第3乳前磨牙,牙槽窝分别用羟基磷灰石,磷酸三钙,自体松质骨填塞,对照未填塞材料。结果显示非吸收性的羟基磷灰石妨碍牙齿萌出,使发育的牙冠变形。但磷酸三钙对牙齿的萌出和发育影响甚小。应注意不在萌出牙的上方或将有活跃正畸移动的区域应用羟基磷灰石。 With 40 cats from March to 4 months old, the second and third premolar molars on the right side of the mandible were removed. The alveolar fossa were filled with hydroxyapatite, tricalcium phosphate and autologous cancellous bone, respectively. The results show that non-absorbable hydroxyapatite prevents tooth eruption and deform the developing crown. However, tricalcium phosphate has little effect on the eruption and development of teeth. Care should be taken not to apply hydroxyapatite to the region above the eruption or to have active orthodontic movement.