目的：观察前牙、双尖牙慢性根尖周病变骨质破坏时，植入天然型无机骨(NNB)的修复与愈合效果。
Objective: to observe the restoration and healing effects of implantation of natural non organic bone (NNB) in chronic periapical bone destruction of anterior teeth or bicuspid teeth.
目的观察天然型无机骨骨缺损内与骨膜下植入后在成骨能力、愈合过程上的差异。
Objective To observe the differences of the osteogenetic ability and the healing process between the natural non-organic bone (NNB) in subperiosteal implantation and in bone defect implantation.
目的观察天然型无机骨骨缺损内与骨膜下植入后在成骨能力、愈合过程上的差异。
Objective To observe the differences of the osteogenetic ability and the healing process between the natural non-organic bone (NNB) in subperiosteal implantation and in bone defect implantation.
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