Unbound MEDLINE

Hemimandibular hyperplasia: a rare case of vertical facial asymmetry. A case report.

Abstract

BACKGROUND
Hemimandibular hyperplasia (HH), also known as hemimandibular hypertrophy, is characterised by excessive unilateral three-dimensional growth of the mandible after birth. Vertical elongation of the mandible on one side becomes clinically evident as a rare form of vertical facial asymmetry. Aberrant growth of the facial skeleton affects the developing dentition and dental compensation is usually unable to maintain optimal occlusal relationships. The resulting malocclusion is best managed surgically to address the various facial, skeletal and dental problems that confront clinicians.
AIM
To present a case of hemimandibular hyperplasia treated using a combined surgical-orthodontic approach.
METHODS
Combined surgical-orthodontic treatment was accomplished in four phases: 1) presurgical orthodontic, 2) surgical, 3) post-surgical orthodontic and 4) orthodontic retention. Comprehensive records (including photographs, study models and radiographs) were taken at the pre-treatment, pre-surgery and debanding stages of treatment.
RESULTS
A significant improvement in facial symmetry and a positive occlusal outcome were achieved. A more balanced gingival display has improved the patient's smile aesthetics.
CONCLUSION
Hemimandibular hyperplasia is a rare condition causing vertical facial asymmetry and a resulting malocclusion. A combined surgical-orthodontic approach is able to accomplish sound facial, skeletal and dental treatment outcomes.

Authors

Bennett SC, Goonewardene MS

Source

Australian orthodontic journal 28:1 2012 May pg 86-93

MeSH

Cephalometry
Facial Asymmetry
Female
Humans
Hyperplasia
Jaw Abnormalities
Malocclusion
Mandible
Mandibular Condyle
Osteotomy, Sagittal Split Ramus
Young Adult

Pub Type(s)

Case Reports
Journal Article

Language

eng

PubMed ID

22866599