Influence of maxillary advancement surgery on skeletal and soft-tissue changes in the nose — a retrospective cone-beam computed tomography study

Head & Face Medicine

Heike M. Korbmacher-Steiner²  Wolfgang M. Kater¹  Rolf Davids¹  Michael Schauseil²  Bernhard Kirsten¹  Andreas F. Hellak² 

[1] Private Practice, Bad Homburg, Germany;Department of Orthodontics, University Hospital, Georg-Voigt-Strasse 3, Marburg 35039, Germany

关键词: Three-dimensional analysis;    CBCT superimposition;    Retrognathia;    Orthognathic surgery;    Nasal changes;   

Others  :  1219619
DOI  :  10.1186/s13005-015-0080-y

 received in 2014-10-21, accepted in 2015-06-30,  发布年份 2015

【 摘 要 】

Objectives

Surgical correction of skeletal maxillary retroposition is often associated with changes in the morphology of the nose. Unwanted alar flaring of the nose is observed in many cases. The aim of the present study was therefore to investigate the influence of surgical advancement of the maxilla on changes in the soft-tissue morphology of the nose. Having a coefficient that allows prediction of change in the nasal width in Caucasian patients after surgery would be helpful for treatment planning.

Materials and methods

All 33 patients included in this retrospective study were of Caucasian descent and had skeletal Class III with maxillary retrognathia. They were all treated with maxillary advancement using a combination of orthodontic and maxillofacial surgery methods. Two cone-beam computed tomography (CBCT) datasets were available for all of the study's participants (16 female, 17 male; age 24.3 ± 10.4 years): the first CBCT imaging was obtained before the planned procedure (T0) and the second 14.1 ± 6.4 months postoperatively (T1). Morphological changes were recorded three-dimensionally using computer-aided methods (Mimics (Materialise NV, Leuven/Belgium), Geomagic (Geomagics, Morrisville/USA)). Statistical analysis was carried out using SPSS 21 for Mac.

Results

The mean sagittal advancement of the maxilla was 5.58 mm. The width of the nose at the alar base (Alb) changed by a mean of + 2.59 mm (±1.26 mm) and at the ala (Al) by a mean of + 3.17 mm (±1.32 mm). Both of these changes were statistically highly significant (P = 0.000). The increase in the width of the nose corresponded to approximately half of the maxillary advancement distance in over 80 % of the patients. The nasolabial angle declined by an average of −6.65° (±7.71°).

Conclusions

Maxillary advancement correlates with a distinct morphological change in nasal width. This should be taken into account in the treatment approach and in the information provided to patients.

【 授权许可】

   
2015 Hellak et al.

【 图 表 】

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