The effect of projection errors on cephalometric length measurements
- 1 August 1986
- journal article
- research article
- Published by Oxford University Press (OUP) in European Journal of Orthodontics
- Vol. 8 (3) , 141-148
- https://doi.org/10.1093/ejo/8.3.141
Abstract
The magnitude of projection errors, calculated theoretically on length measurements in cephalometry was studied. Rotation of the object by up to 5° from the proper position, resulted in errors in length measurements that were usually less than one percent. Rotations of more than 5° may increase the error but imply misalignments of the head that should be evident when positioning the patient. The advantage of extremely long focus film distances seems doubtful.Keywords
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