Laterognathia (hemi-mandibular elongation) The characteristic of hemi mandibular hyperplasia is facial asymmetry (oversized lower face on one side). Hemimandibular hyperplasia (HH) is a developmental asymmetry characterized by three-dimensional enla. Hemimandibular hyperplasia is a developmental asymmetry characterized by three-dimensional enlargement of half of the mandible.6 The hyperplastic side.

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Hyperplassia valid diagnostic procedure is 99mTC scintigraphy, which could demonstrate increased bone activity. Fig 2b The preoperative panoramic radiograph shows the great discrepancy in size and morphology between the right and left condyles, along with an enlargement of the skeletal basis of the right hemimandible in all its dimensions.

Hemimandibular hyperplasia: classification and treatment algorithm revisited.

Diagnosis of asymmetry can be done through many different methods. In such a case, orthognathic surgery would be much more extensive, usually involving the maxilla, the mandible, the chin, the lower border of the mandible, and, sometimes, the condyle as well Figs 2e to 2h.

Journal of Maxillofacial Surgery. Hemimandibular elongation, hemimandibular hyperplasia, facial asymmetry. Orthodontic and surgical treatment of hemimandibular hyperplasia. The latter involves only the condyle, which is radiographically homogeneously enlarged, but the horizontal ramus is not heimandibular in height and the mandibular canal is not displaced. We present a brief review of the literature to make a differentiation between condylar hyperplasia and hemimandibular hyperplasia and to stress the importance of early condylectomy to correct this hyperpasia.

Hemimandibular hyperplasia HH is a developmental asymmetry characterized by three-dimensional enlargement of one half of the mandible.

OPG Click here to view. Annals of Maxillofacial Surgery. Minor asymmetries of the human skeleton are common in the general population and usually have no esthetic or functional significance. Janaki K, Valavan N P. PA cephalometry, panoramic radiograph, and nuclear imaging are some of the techniques that can be used for diagnosis.


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Facial profile Click here to view. A diverse experience with 18 patients”. Fig 2d Patient’s preoperative dental occlusion showing an oblique occlusal plane, a right open bite, and a centered dental midline. The fibrocartilaginous layer is distributed hemimandibullar a diffuse but regular manner all over the condylar head.

The dental occlusion showed a Class II division 2 malocclusion deep biteand the dental midline was centered Fig 1b. An open bite and a crossbite might be present on the affected side, while in HH a crossbite is almost never present. There are two basically different malformations of one side of the mandible which we call hemimandibular hyperplasia and hemimandibular elongation respectively. Fig 2c Posteroanterior cephalogram of the patient showing the inferior displacement of the mandibular angle and the ipsilateral compensatory maxillary growth.

By using this site, you agree to the Terms of Use and Privacy Policy. Histologically, the hyperactive growth includes the whole fibrocartilaginous layer. Facial profile – right side Click here to view. In the case of young patients with HH, this procedure should be performed as soon as possible to prevent the development of an oblique occlusal plane and ipsilateral compensatory maxillary growth 9—12 and to improve symmetry by the spontaneous remodeling processes in the facial structures.

Reciprocal clicking was heard during the movement of the right TMJ. From Wikipedia, the free encyclopedia. Eve, May 15th, 1 Hemimandibular hyperplasia HH is a rare malformation of non-neoplastic origin characterized by a 3-dimensional enlargement of one side of the mandible, ie, the enlargement of the condyle, the condylar neck, and the ascending and horizontal rami.

From a histologic point of view, the affected condyle is covered by a very broad layer of fibrocartilage. The most common form of condylar hyperplasia is unilateral condylar hyperplasia where one condyle overgrows the other condyle leading to facial asymmetry.

This is not observed externally because dentoalveolar structures and the facial soft tissues show compensatory changes to minimize the underlying asymmetry; however, moderate and severe asymmetries are easily noticed by the human eye. Fig 1e Patient’s lateral movement 12 years after surgery. Hemimandibular hyperplasia is a hypeplasia asymmetry characterized by three-dimensional enlargement of half of the mandible.


Hugo Obwegesr hypeprlasia Makek classified condylar hyperplasia into three categories, listed in the table below.

Report of case In Aprila year-old boy was referred to the Department of Maxillofacial Surgery, University Hospital of Parma, complaining of temporomandibular joint TMJ discomfort and subluxation of the right condyle for almost 10 months.

How to cite this URL: InDelaire explained the role of the condyle as a functional rectifier and not the dominant element that controls and directs the growth of the jaw. Normally, hhyperplasia dental occlusion is a Henimandibular II division 2 malocclusion deep bite with the mandibular midline centered.

Hemimandibular hyperplasia was clearly described by Obwegeser and Makek 2 and must be distinguished from solitary and exclusive hyperplasia of the condyle.

A rare case of hemimandibular hyperplasia Janaki K, Valavan N P – Indian J Oral Sci

How to cite this article: Journal of Oral and Maxillofacial Surgery. Computed tomography-2 Click here to view. However, in young patients we support a “wait and see” approach until the end of facial growth in all cases where condylar growth is not so rapid and the facial aspect is still good. Developmental asymmetries include agenesis, hypoplasia, hyperplasia, atrophy, hypertrophy and malpositions of the facial bony structures.

Retrieved from ” https: Many treatment options exist for this type of condition. In the literature, various surgical treatments have been proposed condylectomy, condylar shave, orthognathic surgery, etcdepending on the patient’s age, the presence of active or inactive condylar growth, and the severity of facial appearance.