Cranial symmetry assessment through cone-beam CT images

  • Oswaldo Vasconcellos Vilella Universidade Federal Fluminense
  • Eduardo Kant Rothier Universidade Federal Fluminense
  • Beatriz Souza Vilella Universidade Federal Fluminense
Keywords: Cephalometry, skull, facial asymmetry, tomography.


Objective: The aim of the present study was to compare the right and the left sides of symmetrical individuals´ skull through images generated by cone-beam computed tomography (cbct).
Methods: The sample consisted of 35 scans from the 3d-i-cat (imaging sciences international inc., hatfield, usa) of 13 male and 22 female individuals, aged between 8 and 64, who showed acceptable facial symmetry. The images were entered into the invivodental 5.0 software (anatomage, san jose, usa) and positioned analogously to the patient´s head posture to get a lateral cephalometric radiography. Go-me, go-cd, s-cd, co-gn, and co-a linear distances (mm);, fma, and gogn. sn angles (degrees), as well as five condyle-glenoid fossa linear distances (mm) were the bilateral variables analyzed.
Results: Statistically significant difference between the right and the left sides was only verified when s-cd (mm) was assessed.
Conclusion: therefore, there is no need to obtain bilateral values of these variables (except s-cd) to assess the skull of individuals with no evident asymmetries. In relation to s-cd variable, the difficulty to mark the sella point (s) in a 3-dimensional study created inexistent discrepancies between the right and the left condyles position.

Author Biographies

Oswaldo Vasconcellos Vilella, Universidade Federal Fluminense
Associate Professor, Department of Orthodontics
Eduardo Kant Rothier, Universidade Federal Fluminense
Master Course Student, Department of Orthodontics
Beatriz Souza Vilella, Universidade Federal Fluminense
Adjunct Professor, Department of Orthodontics


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Original Article