Journal article

The reliability of the Frankfort Horizontal in roentgenographic cephalometry


Authors listPancherz, H; Gokbuget, K

Publication year1996

Pages367-372

JournalEuropean Journal of Orthodontics

Volume number18

Issue number4

ISSN0141-5387

eISSN1460-2210

PublisherOxford University Press


Abstract
This longitudinal investigation was undertaken to assess the reliability of the Frankfort Horizontal line (FH) when using either anatomical Porion (Po-a) or machine Porion (Po-m) as reference landmarks. Lateral head films (22 pairs) from subjects at the ages of 11 and 14 years were analysed twice. The results revealed that: (i) the registration error of Po-a was larger than of Po-m; (ii) for Po-a the registration error from the 11 year head films was approximately twice as large as from the 14 year head films; (iii) Po-m was, on average, located similar to 9 mm below and 2 mm anterior to Po-a; (iv) during the 3 years of observation, Po-m changed its position downward markedly more than Po-a; (v) due to the diverging location of machine Porion (Po-m) in relation to true Porion (Po-a) and the large change of Po-m with time, the FH was affected considerably. It was concluded that machine Porion was unsuitable for the construction of the FH, A misjudgement of the reference line may result in diagnostic misinterpretations and lead to false conclusions in longitudinal studies, e.g. when the outcome of a particular treatment procedure is evaluated.



Citation Styles

Harvard Citation stylePancherz, H. and Gokbuget, K. (1996) The reliability of the Frankfort Horizontal in roentgenographic cephalometry, European Journal of Orthodontics, 18(4), pp. 367-372

APA Citation stylePancherz, H., & Gokbuget, K. (1996). The reliability of the Frankfort Horizontal in roentgenographic cephalometry. European Journal of Orthodontics. 18(4), 367-372.



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