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PubMedDate not supplied

The association of simple anterior dental crossbite to gingival margin discrepancy.

The purpose of this study was to determine the severity of gingival margin discrepancy affecting the mandibular incisors in children with a single-tooth anterior crossbite. The response of the position of the gingival margin to correction of the crossbite also was investigated. Twenty-two subjects with a single central crossbite and 16 subjects with a single lateral crossbite were identified from two orthodontic practices. Seventeen of the 22 central incisor patients had immediate posttreatment records available; six patients had long-term follow-up records. An insufficient number of posttreatment records were available for the patients with lateral crossbites. The mean clinical crown length of crossbite mandibular incisors, measured on the study models, was compared with mean crown length of contralateral control incisors and the difference in clinical crown length was determined. A gingival margin discrepancy was identified when the gingival margin of the crossbite incisor was at least 1.0 mm apical to the gingival margin of the control incisor. The proportion of subjects with gingival margin discrepancy was significantly higher in subjects with central incisor crossbite (12/22 = 54%) than in those with lateral incisor crossbite (4/16 = 25%), P less than 0.05. While a gingival margin discrepancy persisted for eight of the 17 central incisor crossbites after discontinuing the appliance, 8.9 +/- 4.7 months, the severity of the discrepancy showed a significant reduction from 2.2 +/- 0.5 mm to 1.3 +/- 0.8 mm, P less than 0.05. True recession with exposure of cementum was not observed in any subjects.(ABSTRACT TRUNCATED AT 250 WORDS)

Child↗
PubMed1981

Growth and its relation to orthodontic treatment.

Surgery has become an invaluable adjunct to orthodontic therapy. However, before embarking on surgical procedures, particularly in growing individuals, it is necessary to appraise each case carefully to determine whether the dentofacial dysplasias can be corrected by orthodontic or orthopedic means. It is possible by the use of investigative procedures to determine the extent and severity of malocclusions and any associated dentofacial dysplasias. General growth rates, increments, and directions can be predicted with some degree of accuracy. Likewise, favorable and unfavorable growth patterns can usually be identified. However, there are those cases in which, for reasons unknown, the growth patterns do not follow the usual trends. These cases often do not respond satisfactorily to treatment because of bizarre or unanticipated growth patterns. Science, unfortunately, has not progressed sufficiently so that such patterns can be identified ahead of time. Until the secrets of such growth patterns are uncovered, treatment procedures, response to the therapy, and growth predictions, of necessity, must be based on average growth trends.

Cephalometry↗
PubMedDate not supplied

A modification of the twin block technique for patients with a deep bite.

Twin Block appliances are simple bite blocks which are designed for full time wear. They achieve rapid functional correction of malocclusions by the transmission of favorable occlusal forces to inclined planes which cover the posterior teeth. One of the authors has successfully completed over 600 cases with the Twin Block appliance and has developed certain modifications which aid in the correction of Class II, division 1 deep bite malocclusion.

Humans↗
PubMed1975

Diagnosis and treatment of maxillomandibular dysplasias.

Skeletal dysplasia of the maxilla and/or mandible is responsible for prognathism or retrognathism. The severity of either condition is in direct proportion to the degree of dysplasia noted within each jaw. Mandibular prognathism is real or apparent. Some of the patients described in this article demonstrate this quite clearly when the jaws are analyzed individually and related to each other. A differential diagnosis is essential to determine whether the abnormality is in the maxilla or the mandible, or both. When recognized early in the formative years, it permits the orthodontist to employ guidance and full therapy procedures in a treatment plan that is programmed to include surgical procedures specifically for the skeletal aberration to be corrected. The treatment skills of the orthodontist and his knowledge of growth of the skeletal and dental structures aid in diagnosis and treatment planning in the areas of both orthodontics and surgery. Close cooperation between the orthodontist and the surgeon permits a more definitive resolution of the existing and potential skeletal and dentoalveolar abnormalities.

Adolescent↗
PubMed1990

Scope and limitations of orthognathic surgery.

Modern orthognathic surgical procedures allow correction of bony disproportion in almost any part of the face, but are limited in the fine tuning of tooth position and occlusion. However, carefully planned combined surgical and orthodontic treatment can produce dental and skeletal results of a high standard. If a GDP is presented with a malocclusion beyond the scope of normal orthodontic treatment, then referral to an oral surgery/orthodontic clinic is indicated. This article provides an overview of what the team on such a clinic can achieve.

Adult↗