| The effects of myotonic dystrophy and Duchenne muscular dystrophy on the orofacial muscles and dentofacial morphology. | |
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MedLine Citation:
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PMID: 10066119 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This article takes a closer view of two of the less rare myopathies, myotonic dystrophy (MyD) and Duchenne muscular dystrophy (DMD). A high prevalence of malocclusions was found among the patients affected by these diseases. The development of the malocclusions in MyD patients seems to be strongly related to the vertical aberration of their craniofacial growth due to the involvement of the masticator, muscles in association with the possibly less affected suprahyoid musculature. Thus, a new situation is established around the teeth transversely. The lowered tongue is not in a position to counterbalance the forces developed during the lowering of the mandible by the stretched facial musculature. This may affect the teeth transversely, decreasing the width of the palate and causing posterior crossbite. The lowered position of the mandible, in combination with the decreased biting forces, may permit an overeruption of the posterior teeth, with increased palatal vault height and development of anterior open bite. The development of the malocclusions in DMD patients also seems to be strongly related to the involvement of the orofacial muscles by the disease. However, the posterior crossbite is not developed owing to the narrow maxillary arch, as is the case in MyD patients. On the contrary, the posterior crossbite in DMD is due to the transversal expansion of the mandibular arch, possibly because of the decreased tonus of the masseter muscle near the molars, in combination with the enlarged hypotonic tongue and the predominance of the less affected orbicularis oris muscle. |
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Authors:
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S Kiliaridis; C Katsaros |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Acta odontologica Scandinavica Volume: 56 ISSN: 0001-6357 ISO Abbreviation: Acta Odontol. Scand. Publication Date: 1998 Dec |
Date Detail:
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Created Date: 1999-04-28 Completed Date: 1999-04-28 Revised Date: 2005-11-16 |
Medline Journal Info:
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Nlm Unique ID: 0370344 Medline TA: Acta Odontol Scand Country: NORWAY |
Other Details:
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Languages: eng Pagination: 369-74 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics, Faculty of Odontology, Göteborg University, Sweden. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biomechanics Bite Force Dental Arch / pathology Facial Bones / pathology* Facial Muscles / pathology* Humans Malocclusion / etiology Mandible / pathology Masticatory Muscles / pathology Maxilla / pathology Maxillofacial Development / physiology Muscle Tonus / physiology Muscular Dystrophies / complications, pathology*, physiopathology Myotonic Dystrophy / complications, pathology*, physiopathology Neck Muscles / pathology Palate / pathology Prevalence Tongue / pathology Tooth / pathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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