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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The condyle seems to be an essential element for normal mandibular growth and development. Maxillomandibular fixation was performed for 10 days, and a 6-month period hemimandibbular physical therapy was done to rehabilitate the TMJ. Indian J Oral Sci ;6: Obwegeser HL, Luder H.

Several theories exist in literature which related to the cause of condylar hyperplasia. Condylar hyperplasia can be considered to be the end result of primary cartilage formation and secondary bone replacement.

A secondary surgical procedure should be carried out to recontour the lower border of the right hemimandible with a genioplasty, but the patient is satisfied with his body image and does not want to hyperplasix more surgery.

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One theory states that an event of a trauma leading to increase in number of hyperplasua mechanism and hormones in that area may lead to increase in growth of mandible on that side.

Fig 1f Patient’s frontal view 12 years after the operation.

The most commonly used radionuclide is 99m technetium 99mTCbecause it emits KeV gamma hemmimandibular, which is sufficiently penetrating to escape the body in needed quantity, is readily detected, and has a 6-hour half-life. Orthopantomograms of HH patients reveal pathognomic findings. If the anomaly occurs before puberty, the maxilla follows the downward growth of the mandible, and the teeth of the affected side usually remain in occlusion but on a lower level than the teeth of the normal side, with a consequent tilting of the occlusal plane in the transverse dimension.


Fig 2f Posteroanterior cephalogram showing the skeletal symmetry after orthognathic surgery. It is important to observe that in this case, as in others described in the literature, 8,9 the pathosis also involves the maxilla with maxillary monolateral vertical growth, including the maxillary sinus.

Annals of Maxillofacial Surgery. Twelve years later, there has been no recurrence, and the patient has a good dental occlusion Figs 1d and 1e and facial appearance Fig 1f.

Eve, May 15th, 1. This hperplasia 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. In humans, mandibular bone has two condyles which are known as growth centers of the mandible.

Retrieved from ” https: The cells are large, the cytoplasm is vesicular, and there is abundant newly produced cartilage matrix between cells. Hemimandibular hyperplasia is a developmental asymmetry characterized by three-dimensional enlargement of half of the mandible.

An open bite and a crossbite might be present on the affected side, while in HH a crossbite is almost never present. It is reported that skeletal asymmetry is found even in the most pleasing and apparently symmetrical faces. Hemimandibulzr procedure called condylectomy can also be done which involves removing part of the growing condyle to arrest any active growth.


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

Hemimandibular hyperplasia: classification and treatment algorithm revisited.

A rare case of hemimandibular hyperplasia. Normally, the dental occlusion is a Class II division 2 malocclusion deep bite with the mandibular midline centered. Computed tomography-2 Click here to view. Minor asymmetries of the human skeleton are common in the general population and usually have no esthetic or functional hemimandibulaf.

A valid diagnostic procedure is 99mTC scintigraphy, which could demonstrate increased bone activity. Few reports are available regarding the long-term follow-up of patients affected by HH who have undergone early high condylectomy. The malformation results in the clinical presentation of ipsilateral enlargement of the mandible and tilted occlusal plane, associated with a deviated chin to the contralateral side.

Accordingly, surgical treatments are designed respectively on the basis of the authors’ classification and treatment algorithm. The point of this surgery to wait as long as the condyle is growing and only do surgery when the condyle stops growing, so the chances of any worsening of facial asymmetry lessens.