:With special reference to Plaster of Paris Implants of Experimental Bone Cavity in the Mandible of Dogs

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概要

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• A study was made to evaluate the effects of plaster of paris in treating infrabony periodontal defects in humans. Seventy-six mongrel adult dogs were used in this study. With a trephine bur and other instruments, standardized bone cavities were prepared under the bifurcation area of buccal side of the mandibular first molar in each dog. Standardized plaster disk was inserted into the bone cavity of the mandibular right side of each dog, and blood was allowed to accumulate in the cavity of the left side as the control. Post operative standardized dental radiographs were taken every week to 27 weeks with a special apparatus which is developed by the author and consists of a film holder, a x-ray beam collimating wire, and original extension cone. Standardized radiographs were observed post-operative changes of bone cavity and were analyzed with aPhoto Pattern Analyzer anda X-Y Recorder. Histopathological observations were made in experimental six groups which were divided into 1, 2, 3, 4, 9, 18 weeks after operation and the control group.The results obtained were as follows;1. The standardized intraoral radiographic technique was proved to be accurate and repeatable more than usual radiographic technique.2. By standardized intraoral radiographic technique, x-ray picture bone cavity in experimental sites could not be appeared earlier about 2 weeks than that of control ones.3. Experimental sites could not be recorded density and pattern of the bone cavity on standardized radiographs earlier 1 week than that of control ones which were analyzed to an aluminum wedge standard using a Photo Pattern Analyzer and a X-Y Recorder.4. Histopathological findings showed that a new bone formation was begining in bottom of the bone cavity and bone proliferation in experimental sites were more rapid growth than that of the control ones.5. The plaster of paris did not seemed to hinder the progress of healing of the bone cavity after the implantation.

• 特定非営利活動法人 日本歯周病学会の論文

特定非営利活動法人 日本歯周病学会 | 論文

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