[Shape of the dental arch and dental occlusion in children aged 0-4 years].
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Child, Preschool↗
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[Anatomical studies on the Japanese deciduous dental arch of four and five-year-old children. 1. Size of the dental arch (author's transl)].
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Child, Preschool↗
The shape of the dental arch.
The shape of the dental arcade was measured in a cross-sectional study of 2,040 sets of maxillary and mandibular study casts of Caucasoids, Mongoloids, and Negroids between 4 and 20 years of age. Three methods of dental arcade analysis were used: dental arch area, dental arch index, and length of the arc of the dental arcade. Each of these computational techniques showed that a different growth pattern was shared by the three ethic groups, and important factor to be taken into consideration in orthodontic treatment.
Adolescent↗
[Anatomical studies on the Japanese deciduous dental arch of four-year-old children and five-year-old children. 2. Difference of the size of the dental arch by the various interdental-space positional patterns (author's transl)].
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Child, Preschool↗
A longitudinal study of dental arch growth.
Changes in dental arch size and form were assessed by means of univariate and multivariate analysis in a longitudinal study of children between 2 and 10 years of age. The multivariate analysis served to assess the arches as a biologic whole rather than as a series of independent dimensions. Dental arches do not seem to undergo a steady rate of change up to the age of 10 years. In the arches anterior to the first permanent molars, peaks of growth occur between 2 and 3 years and 7 and 8 years in the maxilla, and between 2 and 3 years and 5 and 6 years in the mandible. In the arches, including the first permanent molars, peaks of growth occur between 6 and 8 years in the maxilla and between 9 and 10 years in the mandible.
Age Factors↗
The Aymara of Western Bolivia. II. Maxillofacial and dental arch variation.
Maxillofacial and dental arch dimensions of the Bolivian Aymara population are age and sex dependent. Interpopulational comparisons reveal these dimensions to differ from those seen in Aleuts, Australian aborigines, and Swedes, but to be similar to those of the indigenous Taiwanese. Finally, these dimensions are not the same in Aymara of unmixed ancestry, and Mestizos residing in the same villages.
Adolescent↗
A study of the taxonomic significance of the dental arch.
Sixteen dimensions were measured from the maxillary and mandibular dental arches of different ethnic groups of man, apes and monkeys. Multivariate analysis showed that discrimination was possible among the ethnic groups of man on the one hand and between the ape and monkey samples on the other. Nevertheless, the actual degree of discrimination between the primate samples depended upon whether the maxillary or mandibular arch dimensions were analysed. Furthermore, subsequent inclusion of the dental arch dimensions of fossil hominoid samples into the analysis confirmed the taxonomic significance of the dental arch, although its importance must await the acquisition of the more non-human primate data.
Animals↗
Non-human primate dental arch form.
Multivariate statistical analysis, based upon a number of dimensions, showed significant contrasts in dental arch form between four primate groups, which was difficult to identify from subjective visual inspection. Furthermore, analysis of dental arch size was shown to differ from dental arch shape, although whether this reflected predominantly genetic or environmental factors, requires further research.
Anatomy, Comparative↗
[Anterior length of the dental arch and its relationship with other dental measurements (author's transl)].
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Anthropometry↗
The management of dental arch deformity in cleft lip and palate.
Dental arch deformities develop in the embryo and fetus and are severe at birth. The clinician's responsibility to the patient is to guide the natural mechanisms of growth and compensation so that many aspects of the deformities will be alleviated. Scar tissue is an undesirable sequela to surgery, and should ideally not be adjacent to actively growing areas of the maxilla. There are three methods of managing arch deformities: by prevention, by interception, and by correction. The plastic surgeon modifies the deformity and thereby establishes the framework within which the orthodontist and prosthodontist may accomplish fairly minor alterations.
Adolescent↗
Lip and tongue pressures related to dental arch and oral cavity size in Australian aborigines.
Although the oral cavity and dental arches of the Australian aborigine are large, studies of lingual and labial pressures indicate that the tongue is neither unusually large nor strong. The Australian aborigine's pharyngeal cavity is smaller in height and depth than that of the American; just the opposite is true for the oral cavity. To the extent that environmental factors are important at all, the resting pressure of the lips, not tongue pressure during swallowing, is probably the significant determinant of dental arch dimensions.
Adolescent↗
Observations on two cases of change in the dental arch and occlusion during the period of changing dentition.
The object of this study was to know what changes take place on the dental arch during the changing dentition. For this purpose, two excellent cases were observed from six to twelve years of age, and the following results were obtained from its observation. Enlargement of dental arch was observed till the shedding of the deciduous second molar. In the anterior segment, not only the increment of the arch width but also the labial inclination and/or movement of the permanent incisors was noted in conjunction with the eruption of these teeth. These tendencies were slightly observed during the eruption of the permanent canine. In the buccal segment, the space for the permanent buccal teeth increased during the time of eruption of the permanent canine and first premolar, and this increase made it possible for these teeth to align normally.
Child↗
A computer program for the analysis of dental arch form using the cubic spline function.
This paper presents the details and logic of a FORTRAN computer program which fits a cubic interpolatory spline to a set of data points digitized from an exact size photographic reproduction of a dental model. It also measures the length of the arc and computes a set of normals to the curve to be used in evaluating the error in the fit of the spline. The program is used in studies of dental arch form and is useful in evaluating changes in the form of the arches due to orthodontic treatment. The measurement of the arc length provides an adequate assessment of space available in the dental arch, which is of importance to the orthodontist.
Cephalometry↗
[Growth in the width and length of the dental arch in children with unilateral cleft lip and cleft palate].
A study of casts of the dentitions of children with cheilognathopalatoschisis made over an extended period emphasizes that the development and the growth of the maxillary dental arch in width and length are considerably reduced as compared to children without clefts. Consequently, therapeutical measures must be taken to maintain the length and width of the maxillary dental arch.
Adolescent↗
Growth in width of the dental arches after partial extirpation of the mid-palatal suture in man.
During the last 27 years 35 children with choanal atresia were operated by a method which entails a resection of the posterior 2/3 of the mid-palatal suture. In order to evaluate the consequences of this resection the width of the dental arches was measured in 320 individuals including 55 operated and unoperated patients with choanal atresia. Extirpation of the mid-palatal suture during growth resulted in a frequency of cross-bite of 52% and a significant reduction of the width of the upper dental arch and the maxilla. The findings may indicate that the growth in this specific suture is highly autonomous. Growth appeared to proceed far beyond childhood.
Adolescent↗
[Plea against lengthening a shortened dental arch].
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Dental Arch↗
[The shape of the ideal arcogrammetric dental arch].
On 48 arcograms of 24 cases with ideal occlusion polynomes of the form y = bo + b1x + b2x2 + b3x3 ... + b8x8 were established by the method of least squares. By means of a stepwise polynomal regression the coefficients up to the 8th degree were tested on significance. Finally polynomes of 4th degree were chosen to describe the anterior dental arch from 6 mesial to mesial 6 of the arcogram. Resulting error expressed as mean of the residuals of values observed--values calculated was 0.08 +/- approximately 0.6 mm (mean +/- 1 SD).
Dental Arch↗
A comparative study of tooth and dental arch dimensions in Jewish children of different ethnic descent. I. Kurds and Yemenites.
Dental casts of 99 Kurdish and 98 Yemenite Jewish children evenly distributed between the sexes, aged 12 years, were measured for mesiodistal and buccolingual tooth dimensions, and arch depth and width. Dental dimensions showed significant differences between the two groups in certain permanent teeth in mesiodistal length, while in the buccolingual diameter the differences did not reach statistical significance. Dental arch form in Kurdish children was more rounded due to significantly bigger arch width, while arch depth was not significantly different from Yemenites. Intragroup sex differences were found in both groups with reference to arch dimensions, while in the dental parameters they were more strongly expressed in Kurdish children.
Child↗