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On the measurement of cranial thickness at nasion on cephalographs
Author(s) -
Einy Shmuel,
Smith Patricia,
Becker Adrian
Publication year - 1984
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330650311
Subject(s) - nasion , tangent , line (geometry) , projection (relational algebra) , arc (geometry) , mathematics , geometry , anatomy , biology , algorithm
Cranial bone thickness at nasion is difficult to measure by the conventional method of drawing a line at right angles to the tangent at nasion on the outer table. The difficulty arises from a lack of uniformity of the arc in this region. The proposed use of a constructed line, drawn at 30° to the anterior projection of the Frankfort horizontal plane, provides an accurate, easily reproduceable, and compatible alternative method of measurement.