Journal Article

Change in cranio-cervical angulation following orthognathic surgery

Deena Savjani, David Wertheim and Raymond Edler

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 27, issue 3, pages 268-273
Published in print June 2005 | ISSN: 0141-5387
Published online June 2005 | e-ISSN: 1460-2210 | DOI:
Change in cranio-cervical angulation following orthognathic surgery

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Changes in natural head posture (NHP) were investigated in 33 patients (10 males, 23 females) with an age range of 16–40 years (median 21 years) following orthognathic surgery to change vertical face height. The reproducibility of the radiographer's technique of taking radiographs in NHP was investigated using a photographic method and found to be acceptable. The patients were divided into two groups: group 1, patients who had more than 3 mm of vertical change in anterior total face height (ATFH) and group 2, those who had less than 3 mm vertical change.

For group 1 there was a significant relationship between ATFH change and cranio-cervical angulation (NSL/OPT) change (r = 0.532, P = 0.023), compared with group 2 (r = −0.247, P = 0.376). A similar relationship was revealed between lower anterior face height (LAFH)/ATFH ratio and NSL/OPT, where the correlation was also higher in group 1 (r = −0.635, P = 0.005) compared with group 2 (r = −0.182, P = 0.515). The correlation between cranio-vertical angulation (NSL/VER) and ATFH was not significant for group 1 (r = 0.406) or group 2 (r = 0.239) patients. Additionally, NSL/VER and LAFH/ATFH correlation for the two groups was not significant (r = −0.392 and −0.338, respectively).

There appears to be a relationship between the reduction in vertical face height following orthognathic surgery and neck posture (as indicated by NSL/OPT). As no significant relationship was found between the reduction in face height and head posture (as indicated by NSL/VER) this suggests that neck posture, rather than head posture, had changed.

Journal Article.  0 words. 

Subjects: Restorative Dentistry and Orthodontics

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