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CONTROVERSIES IN CEPHALOMETRICS

CONTROVERSIES IN CEPHALOMETRICS

  • Wylie et al compared five analyses in ten individuals who underwent various surgical corrections.Pre treatment cephalometric radiographs of the ten patients were selected to illustrate different dentofacial deformities , each of which was corrected with a different surgical procedure.
  • The pretreatment cephalometric radiographs were blindly assessed by one investigator¬† who used the criteria for each of five popular analyses.
  • The results of the analyses ( diagnoses ) were then compared to one another and to the actual surgery performed.
    • While the primary errors are biologically induced , the secondary errors are entirely mathematically defined, since they are related to the primary errors.
    • Errors in tracing superimposition can be compounded by the method of superimposition used in interpreting the findings.
    • A study conducted by Ghafari et al demonstrated differences in interpretation of facial changes by comparing four traditional cephalometric methods of superimposition.( best fit on anterior cranial base anatomy,sella-nasion,registration point with bolton nasion planes parallel and basion- nasion plane.

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