口腔の遺伝研究 : III 親子間における口腔諸形質の遺伝

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Hereditary traits in the head, face and mouth of parents and children were studied as to the resemblance, the average percent deviation, the correlation coefficient together with effects of environment upon the hereditary manifestations. The results obtained were summarized as follows. 1 Incisors : Resemblance in the incisal occlusion type was more clearly demonstrated between father and son (F : S) than between mother and daughter (M : D). As to resemblance in the incisal overbite, however, no remarkable difference was found between every combinations of parents and children. 2 Length and width of dental arch : Hereditary influence was more conspicuous between M : D and between father and daughter (F : D) than between mother and son (M : S) and F : S. 3 Dental arch index : Difference in resemblance was small between each combinations. 4 Length of dental arch ; Resemblance was more conspicuous between father and children (F : C) than between mother and children (M : C). 5 Palate height ; Resemblance between parents and children was more conspicuous in the posterior palatal height than in the anterior one, which was more distinct between M : C than between F : C. Other hereditary traits in this region behaved likewise. 6 Palatal height index ; Resemblance between M : S and F : S was stronger than between F : D and M : D. 7 Median palatine suture ; Hereditary effect on the length was more clearly demonstrated in between F : C than in between M : C. Resemblance in the suture forms was stronger in between F : S and M : S than in between F : D and M : D. 8 Palatal arch ; Hereditary influence on the height was stronger in between M : C than in between F : C. Resemblance of palatal arch types was stronger in between F : S and M : D than in between F : D and M : S. 9 Number of Plicae palatinae transversae ; Resemblance between M : C was stronger than between F : C. 10 Dental arch types ; Resemblance was stronger between F : S and M : D than between F : D and M : S. 11 Circular length of dental arch ; Hereditary influence was greater between F : D and M : D than between F : S and M : S. 12 Breadth of incisor crown ; Resemblance was stronger between F : D and M : D than between F : D and M : D than between F : S and M : D. 13 Number of lower molar cusps ; No remarkable difference in resemblance was found between each combination. 14 Dislocated tooth ; Separated median line ; Resemblance between F : S and M : D was slightly stronger than between F : D and M : S. 15 Torsioned tooth ; Conical tooth ; Dwarf tooth ; Geminated tooth ; Carabelli's cusp : Prostostylid ; No remarkable difference was present between each combination. 16 Incisor occlusion types ; Resemblance between F : S and M : D was slightly stronger than between F : D and M : S. 17 Cranio-facial region ; Resemblance between F : S and M : D was stronger than between F : D and M : S. 18 Lips ; Resemblance between F : D and M : D was slightly stronger than between F : S and M : S. 19 Hair types ; Difference in resemblance was not found between each combination. 20 Number of eye lids ; Resemblance between F : S and M : D was slightly stronger than between F : D and M ; S. 21 Number and position of whirl of head hair ; Resemblance between F : D and M : D was slightly stronger than between F : S and M : S. 22 Position of thumbs when right and left hands were clasped ; Resemblance between F : S and M : S was slightly stronger than between F : D and M : D. 23 These rememblances between parents and children in cranio-facial region, lips, dental arch, palate and teeth did not occur uniformly, i.e, some traits resembled between same sex combinations while other traits resembled between different sex combinations. The effects of heredity and environment exerted upon these traits were not also simple. Resemblance between parent and children wes weaker than resemblance between twins.
1957-03-31

口腔の遺伝研究 : III 親子間における口腔諸形質の遺伝

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