上顎中切歯の歯隨腔形態のX線学的研究

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The purpose of this study is to estimate the form of pulp cavities of rupper central incisors using roematgenograms. Materials were fifty extracted upper certtral incisors. First, roentgetaograms of tlaese materials were taken from labio-lingual and mesio-distal directionas. Then ten deuutists read and traced the form of pulp cavities as shown by the roentgcnograms, after which the percentage of readability was determined. Furthermore, the incisors were then cut in order to trace the actual form of pulp cavities and these tracings were compared with those made by the dentists as based on the roentgeuaograms. It was shown by this study that the tracings of pulp chamber at the dental cervix based on the rccentgeuaograms taken from the labio-lingtual direction and the tracings at the horn of pulpchamber based on the roentgenograms taken from the mesio-distal direction closely approximated the tracings of the cut materials. It was also found that readability of these points was 100% for all ten dentists. Based on these results, the two above merationed points were designated as the datum points to be used when estimating the form of pulp cavities. Furthermore, the form of pulp cavities of the cut teeth was concidered in order to determine the angle of the mesial and distal projection of the horn of pulp chamber against the datum plane of the dental cervix. In the above manner, a possible method of estimating the form of pulp cavities of upper central incisors usintg two roentgenograms was investigated.
日本補綴歯科学会の論文
1989-02-01

上顎中切歯の歯隨腔形態のX線学的研究

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