This study was performed to compare the assessments of certain widely used angles made by conventional tracing with those made by McEwen and Martin's Ortho Grid. For clinical purposes the Ortho Grid is as reliable as the tracing method. Some grid measurements were consistently different from those made by tracing.
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References
1.
GravelyJ. F. and BenziesP.M. (1974) The clinical significance of tracing error in cephalometry, British Journal of Orthodontics, 1, 95–101.
2.
McEwenJ. D. and MartinJ. (1967) The rapid assessment of cephalometric radiographs, Dental Practitioner, 17, 195–198.
