HEMIMANDIBULAR HYPERPLASIA PDF

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 patient’s parents declined postoperative orthodontic therapy to correct the deep bite. The etiologic factors that cause facial asymmetries and their underlying mechanisms are not yet completely understood.

Condylar hyperplasia

The pathophysiological bases of the abnormal growth are discussed. Indian J Oral Sci ;6: Fig 1d Patient’s dental occlusion 12 years after condylectomy obtained without pre- or postsurgical orthodontic treatment. Condylar hyperplasia mandibular hyperplasia is over-enlargement of the mandible bone in the skull.

Computed tomography-2 Click here to view. Fig 1c The preoperative panoramic radiograph reveals a discrepancy in size and morphology between the right and left condyles, enlargement of the right condyle, and elongation of the right ascending ramus. How to cite this article: The Journal of Craniofacial Surgery. The maxilla usually follows the mandible and grows downward on the affected side. Fig 2d Patient’s preoperative dental occlusion showing an oblique occlusal plane, a right open bite, and a centered dental midline.

Separation and characterization of the hyperplsaia elements”. Related articles Hemimandibular elongation hemimandibular hyperplasia facial asymmetry. The latter involves only the condyle, which is radiographically homogeneously enlarged, but the horizontal ramus is not increased in height and the mandibular canal is not displaced. It is a condition without a definitive etiology.

Fig 2a Patient’s preoperative hemimancibular view. Hemimandibular elongation, hemimandibular hyperplasia, facial asymmetry. 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.

A rare case of hemimandibular hyperplasia. The stimulus for the abnormal growth either lies within the fibrocartilaginous layer or is produced by it.

We are convinced that there exist pure and mixed forms of both growth anomalies because we have observed several such clinical hemimandibularr.

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OPG Click here to view. 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.

Hemimandibular hyperplasia–hemimandibular elongation.

Different histological patterns within the condylar growth zone hemimandobular seen in the two anomalies. Hemimandibular hyperplasia was clearly described by Obwegeser and Makek 2 and must be distinguished from solitary and exclusive hemimsndibular of the condyle. Idiopathic noncondylar hemimandibular hyperplasia. Fig 1f Patient’s frontal view 12 years after the operation.

A panoramic radiograph revealed a discrepancy in size and morphology between the right and left condyles, enlargement of the right condyle, and elongation of the right ascending ramus, as well as an enlargement of the skeletal base of the right hemimandible hemimandibbular all its dimensions, together with a downward growth.

International Journal of Clinical and Experimental Medicine. Fig 1g Panoramic radiograph 12 years after the condylectomy demonstrates readaptation of the right condyle in the fossa. We consider the operative results to be fairly satisfactory. Few reports are available regarding the long-term follow-up of patients affected by HH who have undergone early high condylectomy. Acquired asymmetries occur as a result of traumas, infections, functional shifts and tumors.

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Maxillomandibular fixation was performed for 10 days, and a 6-month period of physical therapy was done to rehabilitate the TMJ. However, in young patients we support heemimandibular “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. In addition, in view of potential complications arising hemimandibklar condylectomy, none of the patients had undergone condylectomy as part of the surgical treatment.

Sitemap What’s New Feedback Disclaimer. Hemimandibular hyperplasia treated by early high condylectomy: 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.

In this study, the authors classified the patients into hemimandibualr and atypical types of HH on the basis of clinical and radiologic observations in an effort to achieve a simplified and efficient surgical management on the basis of the severity of deformity. A valid diagnostic procedure is 99mTC scintigraphy, which could demonstrate increased bone activity.

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Clinical and radiographic experience as well as histological findings leave no doubt that the term “condylar hyperplasia” refers only to hyperplasia of the condyle alone and hypeplasia therefore not be used to mean the two hemimandibular anomalies as is the case in the literature today.

Generally, the abnormal growth of the mandible ceases at the same time as the completion of general growth. Bone scanning, a tracer method based on the injection of phosphates labeled with a radionuclide, is a noninvasive technique to evaluate whether the condylar growth is still active.

The condyle seems to be an essential element for normal mandibular growth and development. Fig 1b Patient’s hfmimandibular dental occlusion showing a Class II division 2 malocclusion deep bitebut the dental hyperppasia is centered.

Normally, the dental midline is deviated toward the unaffected side but may also be centered, depending on the vector and speed of growth. Orthognathic surgery can be performed once the active condylar growth has finished in some cases.

Many treatment options exist for this type of condition. Condylar hyperplasia has an unknown cause. 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.

The authors present their experience on the basis of this proposed classification and treatment algorithm with functional and aesthetic outcomes as the end points of this study.

In fact, if surgery is delayed until the end of growth, the surgeon will be unable to take advantage of the spontaneous remodeling of the tissues obtained during growth with a single condylectomy. Developmental asymmetries include agenesis, hypoplasia, hyperplasia, atrophy, hypertrophy and malpositions of the facial bony structures.