Dentofacial Development Research Articles

The Newburgh-Kingston Caries Fluorine Study VII. Correlation of ingested water fluorides to dentofacial development: A preliminary report

An interim analysis is presented of the caries prophylactic effects of ingested water fluoride in children aged 5 to 12 years in Newburgh, as compared with children of the same ages in fluoride-free Kingston. These data show that among the 6- to 9-year-old children in Newburgh there are 55 per cent less DMF teeth per 100 erupted permanent teeth, as compared with the same-aged children in Kingston. Among the 10- to 12-year-old children there is a difference of 43 per cent. In the deciduous dentition, the reduction in def teeth among Newburgh children ranged from 59 per cent in the 5-year-old, to 12 per cent in the 8-year-old children, as compared with those in Kingston. The total dental caries experience for both the permanent and deciduous dentitions show that for each age level from 6 to 12 years the Newburgh children experienced dental decay in approximately two teeth less than the Kingston children. Among the 5- to 7-year-old children there were approximately twice as many with all of their deciduous canines and deciduous molars present and caries-free as were noted in Kingston. The details are presented of the dentofacial growth and development study among 1,000 children aged 6 to 10 years in Newburgh and Kingston.

Effects of maxillary bite plane therapy in orthodontics

This clinical report describes the simultaneous use of functional and fixed appliances to modify the pattern of dentofacial development and align teeth in preparation for prosthodontic habilitation of a growing child with hypohidrotic ectodermal dysplasia. The treatment objective was to create a more favorable starting point for the prosthodontic phase of habilitation by improving the sagittal and vertical skeletal relationships and facial esthetics. This was accomplished through growth modification with functional appliances conducted simultaneously with eruption of maxillary and mandibular molars, dental arch expansion, alignment, and space management using fixed orthodontic appliances. Orthodontic retention was accomplished by means of removable partial dentures. A second phase of orthodontics conducted closer to the age of skeletal maturation will aim at definitive tooth alignment in preparation for dental implant-supported restorations.

General growth acceleration and retardation in relation to dentofacial development

1. 1. A knowledge of the medical history and physical status of the child is of prime importance in establishing a diagnosis and in determining the time when orthodontic intervention should be undertaken and the type of treatment to be instituted. 2. 2. Cephalometric diagnostic criteria and mechanotherapy must be correlated with the factors responsible, not only for the malformations present, but also with those responsible for the general developmental status of the patient. 3. 3. The characteristics of growth and development are presented, and criteria for assessing the status and progress of growth and development are discussed. 4. 4. The factors most responsible for dentofacial growth disturbances are indicated. 5. 5. The various types of dwarfism and gigantism are mentioned.

Temporomandibular muscle contraction patterns in Angle Class II, Division 1 malocclusions: An electromyographic analysis

An electromyographic analysis of the temporomandibular articulation of sixteen cases of Angle Class II, Division 1 dentofacial deformity is presented. A comparison with the electromyographic findings in a similar group of subjects with normal dentofacial development is made. Changes in electrical phenomena in the temporomandibular musculature as a result of orthodontic therapy are also reported.

Criteria for extraction in orthodontic therapy related to dentofacial development

The factors in the dentofacial complex which constitute criteria for extraction in individual patients may be summarized as follows: 1. 1. The labiad-linguad dental arch relationship to the prementon point. 2. 2. The size of the gonion angle. 3. 3. The axial inclination and the relationship of the mandibular incisors to a plane which passes through the prementon point and is perpendicular to the mandibular plane. 4. 4. The type and degree of irregularity and crowding present in the dental arches before orthodontic treatment is undertaken. 5. 5. The presence of constriction of the basal arches in relation to the dental arches. 6. 6. The relative difference in size of the basal arches. 7. 7. The amount and distribution of the soft tissues covering the facial bones.

Normal and Abnormal Dentofacial Development

Normal and Abnormal Dentofacial Development