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KMID : 0358819850120020227
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Journal of Korean Society of Plastic and Reconstructive Surgeons
1985 Volume.12 No. 2 p.227 ~ p.231
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TREATMENT OF BIMAXILLARY PROTRUSION
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Kim Chin-Hwan
Lee Taik-Jong
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Abstract
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Bimaxillary protrusion implies protrusion of the mandibular incisor teeth associated whith maxillary protrusion.
Abnormal growth of the craniofacial structures may produce bimaxillary dental protrusion with severe dental and facial disharmony.
In this condition, both the maxillary and mandibular incisor teeth are significantly more procumbent on their bony bases than are normal teeth. Bimaxillary protrusion is a relative designation, as the dentoalveolar prominence results from overdevelopment of the maxillary and mandibular arches or from underdevelopment of the other skeletal components.
Lip incompeteucy, "receding chin effect"and loss of labiomental curve are frequently observed in these patients.
The majority of the adult bimaxillary dental protrusions can be treated by orthodontics in 24 to 30 months by extracting 4 first premolars and moving the anterior teeth posteriorly.
But satisfactory facial harmony and balance can be restored by surgical-ortho-dontic procedures when improvement in facial harmony cannot be achieved through orthodontic therapy alone or when an adult patient is unwilling to accept the required appliande therapy.
Moreover, orthognatic surgery has an advantage over orthodontic because the former moves the basal bone with the dental component, whereas the latter limits itself to the dentoalveolar segment only.
A combination of surgery performed with orthodontics was successful in treating a pateint who had bimaxillary dental protrusion.
Functionally balanced occlusion with facial balance and harmony was achieved by intraoral surgery in the anterior part of the jaws and orthodontic treatment
Hereby, we present a case of bimacillary protrusion in young female who has been treated successfully by premolar setback osteotomy.
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KEYWORD
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