パントグラフの誘導要素が顆路に及ぼす影響
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概要
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A study was made on the effect on condylar path of the guide plane of the clutch and of raising occlusal vertical dimension by mounting the clutch when a pantograph is used. For this purpose, an intraoral guiding devices which allowed free adjustment of the degree of raising occlusal vertical dimension and of guide inclination were used. Improvements were also made on the pantograph so that (1) the posterior recording table itself could be attached or detached at will and (2) condylar point and the stylus position would agree. Examination was made on the degree of occlusal vertical dimension raised by attaching a Denar pantograph and the inclination of protrusive condylar path obtained by using the experimental devices. The results were as follows : 1. With use of the clutch of a Denar pantograph, the occlusal vertical dimension raised was a minimum of 7mm and a maximum of 11mm with an average of 8.1±1.3mm. 2. Inclination of protrusive condylar path obtained by tooth guidance was a minimum of 26.3°and a maximum of 54.2°with an average of 37.2±7.3°. 3. When occlusal vertical dimension was kept constant, no effect was made on the guide plane which guides the mandible to 10, 30, or 50°. 4. When inclination of the guide plane was set at 10°, the inclination of protrusive condylar path at high occlusal vertical dimension was 29.5±8.2°and that at low occlusal vertical dimension was 32.7±7.9°. There was a tendency for the protrusive condylar path to be gentler with higher occlusal vertical dimension. This tendency was the same when the inclination of the guide plane was set at 30°or 50°. 5. When a comparison was made of inclination of protrusive condylar path during tooth guidance and that during the use of the clutch, the latter was gentler with statistical significance. At this time, there was a tendency for the inclination to be gentler with raising of occlusal vertical dimension. 6. In using a pantograph, care must of course be given to the setting of guide inclination. However, more important is that raising of occlusal vertical dimension must be kept to a minimum.
- 九州歯科学会の論文
- 1986-02-25
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- パントグラフの誘導要素が顆路に及ぼす影響 : 主論文の要旨
- パントグラフの誘導要素が顆路に及ぼす影響