Feb 24, 2011

Effects of sagittal maxillary growth hypoplasia severity on mandibular asymmetry in unilateral cleft lip and palate subjects

The Angle Orthodontist
Ashok Kumar JenaAshok Kumar Utreja

Abstract

To test the hypothesis that sagittal maxillary growth hypoplasia has no effect on mandibular asymmetry among subjects with complete unilateral cleft lip and palate (UCLP). A total of 86 subjects (normal noncleft, 42; UCLP, 44) in the age range of 15 to 25 years were chosen. Normal noncleft subjects were included in Group I. Based on the severity of sagittal maxillary growth hypoplasia, subjects with UCLP were divided into two groups. Subjects with UCLP in whom the SNM angle was ≥71 degrees and the M-point to Nasion perpendicular distance was ≤-10 mm were included in Group II. Group III consisted of subjects with UCLP in whom the SNM angle was <71 degrees and the M-point to Nasion perpendicular distance was >-10 mm. The mandibular asymmetry index (condylar, ramal, and condylar+ramal), gonial angle, and depth of the antigonial notch of three groups of subjects were examined on orthopantomograms (OPGs). Among Group II subjects in whom sagittal maxillary growth was near normal, ramal and condylar+ramal heights were significantly less on the cleft side than on the normal side (P < .01). Condylar, ramal, and condylar+ramal asymmetry indices were significantly greater among Group II subjects. Mandibular asymmetry indices among Group I...Continue Reading

  • References17
  • Citations3

References

  • References17
  • Citations3

Citations

Mentioned in this Paper

Mandible
Nasion
Notch
Maxilla
Maxillary Diseases
Hypoplasia
Cleft Palate, Isolated
Panoramic Radiography
Craniometry
Structure of Pituitary Fossa

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