Condylar and ramal vertical asymmetry in adolescent patients with cleft lip and palate evaluated with cone-beam computed tomography

Am J Orthod Dentofacial Orthop. 2013 Nov;144(5):691-7. doi: 10.1016/j.ajodo.2013.07.009.

Abstract

Introduction: The aims of this study were to evaluate condylar and ramal mandibular vertical asymmetry in a patient group affected by unilateral (UCLP) and bilateral (BCLP) cleft lip and palate, and to compare the findings with a well-matched control group with normal occlusion.

Methods: The study groups included 20 UCLP patients (12 male, 8 female), 21 BCLP patients (12 male, 9 female), and a control group of 21 subjects with normal occlusion (10 male, 11 female). Measurements of condylar, ramal, and condylar plus ramal heights and asymmetry indexes were examined on cone-beam computed tomography images. One-way analysis of variance was used to determine potential statistical differences among the groups for condylar, ramal, and condylar plus ramal asymmetry index measurements. The post-hoc Tukey HSD test was used to determine individual differences.

Results: No investigated group showed a statistically significant sex difference for any asymmetry index (P >0.05). There was a statistically significant difference between the normal and cleft sides in the ramal height and ramal plus condylar height measurements in the UCLP group (P = 0.004 and P = 0.006, respectively). The Tukey HSD test showed a statistically significant difference between the UCLP and BCLP groups in terms of ramal asymmetry index values (P = 0.018).

Conclusions: The ramal height and ramal plus condylar height measurements were significantly lower in the cleft side in the UCLP patients, and there was a statistically significant difference in ramal asymmetry index values between the patients affected by UCLP and BCLP.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Age Determination by Skeleton
  • Case-Control Studies
  • Cephalometry / methods
  • Cervical Vertebrae / growth & development
  • Child
  • Cleft Lip / diagnostic imaging*
  • Cleft Palate / diagnostic imaging*
  • Cone-Beam Computed Tomography / methods*
  • Facial Asymmetry / diagnostic imaging*
  • Female
  • Humans
  • Male
  • Mandible / diagnostic imaging*
  • Mandibular Condyle / diagnostic imaging*