Aetiology of malocclusion of the teeth
Article Abstract:
Malocclusion is the abnormal positioning of teeth of the upper and lower jaws, resulting in imperfect contact. It may result from injury or disease, such as tooth decay or periodontal disease, involving the gums and other tissues supporting the teeth. Malocclusion may involve only a few teeth or a group of teeth. Normal occlusion involves overlapping of the upper incisors, or four front teeth in the upper jaw, by one third of their length with the lower incisors when biting down. In addition, the upper premolar and molar, the grinding back teeth, should make contact outside and behind the corresponding teeth in the lower jaw. Normally, the mandible, or lower jaw bone, grows forward relative to the maxilla, the upper jaw bone. The factors that cause malocclusion include an excess or absence of teeth; abnormalities in the form or positioning of teeth; disturbances in jaw growth; disorders in the relation of the dental arch (the arch formed between the teeth) and jaw portion containing the tooth socket; and crowding of the teeth. Abnormalities in the dental arch relationship may result from genetic factors, breathing through the mouth, or congenital malformations. Crowding of teeth is the most common cause of malocclusion and results from disproportion between the size of the teeth and the bone supporting the teeth. Various mechanisms that result in crowding of the teeth are described. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Archives of Disease in Childhood
Subject: Health
ISSN: 0003-9888
Year: 1991
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Landmines: dragon's teeth
Article Abstract:
Landmines cost abut $5 but each week 150 people die or are maimed by them and the cost and suffering is immeasurable. After a cease fire, the presence of mines slows the peace process and the return to normalcy. The care of mine victims is described. Most are injured in rural areas and aid is far.
Publication Name: World Health
Subject: Health
ISSN: 0043-8502
Year: 1995
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Whiter teeth
Article Abstract:
Porcelain laminate veneers and porcelain caps are being used to make teeth whiter. A bleaching procedure at a dentist's office followed by in-home bleaching is an alternative.
Publication Name: Joe Weider's Muscle & Fitness
Subject: Health
ISSN: 0744-5105
Year: 1992
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