The author has studied the plaster impressions of the dental arches and palates which made of 100 Fisherwomen biometrically and determined their parameters and the following conclusions have been drawn.
1) The most common types of upper and lower dental arches of a fisherwomen are that of rounded square, and it comprises 65.0 percent of all cases.
2) The five kinds of the types of the sagittal vault of the palate of a fisherwomen showed the frequency of occurrences in sequences:
The convex type, the s-shaped type, the strongly curved s-shaped type, slightly s-shaped type.
3) The five kinds of the types of the transversye, vaults of the palate of a fisherwomen showed the frequency of occurrences as follows;
The V-shaped type is the highest, the slightly rounded trapezoid type is the second, the slightly rounded type is the third, and the W-shaped type is the lowest.
4) The width of the dental arch of a fisherwomen were as follows;
Maxillary Mandibular
dental arch dental arch
Bi-central incisor width 18.32 mm 12.75 mm
Bi-lateral incisor width 31.15 mm 23.45 mm
Bi-canine width 42.15 mm 34.95 mm
Bi-first premolar width 49.78 mm 44.05 mm
Bi-second premolar width 57.15 mm 51.25 mm
Bi-first molar width 64.15 mm 60.15 mm
Bi-second molar width 68.18 mm 66.29 mm
5) The length of the dental arch of a fisherwomen were as follows;
Mandibular Maxillary
dental arch dental arch
Protuberance of labial surface of central
incisor-canine length 15.24 mm 11.43 mm
Protuberance of labial surface of central
incisor-first premolar length 23.16 mm 17. 26 mm
Protuberance of labial surface of central
incisor-second premolar length 29.43 mm 35.05 mm
Protuberance of labial surface of central
incisor-first molar length 40.48 mm 35.05 mm
Protuberance of labial surface of central
incisor second molar length 43.35 mm 44.95 mm
6) The height of the palate of a fisherwomen were as follows,
Part of canine 6.24 mm
Part of first premolar 13.46 mm
Part of second premolar 19.95 mm
Part of first molar 23.46 mm
Part of second molar 22.76 mm
7)The dental arch of a fisherwomen was greater than of the normality of the dental arch.
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