Sinus floor elevation put in ready-made spacer build up with low crystalline carbonate apatite and without bone graft

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We have succeeded in developing low crystalline carbonate apatite from calcium hydrate without sintering. We searched the effect of particle size of the carbonate apatite on the resorption of the particle and the bone formation. The degree of decrease the particle size was much in small particle than large particle. The amount of bone formation was much in small particle than in large particle. And we used carbonate apatite as rabbit sinus lift materials, exhibited the materials useful for the bone defect with absorbed and replace with bone.