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Arch Dimensions (arch + dimension)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

A randomised prospective clinical trial into the effect of infant orthopaedics on maxillary arch dimensions in unilateral cleft lip and palate (Dutchcleft)

EUROPEAN JOURNAL OF ORAL SCIENCES, Issue 5 2001
Charlotte Prahl
Aim of the study was to evaluate the effect of infant orthopaedics (IO) on maxillary dimensions in infants with unilateral cleft lip and palate (UCLP). The study design was a prospective two-arm randomised controlled trial in parallel with three participating academic Cleft Palate Centres. Treatment was assigned by means of a computerised balanced allocation method. One group (IO+) wore passive maxillary plates during the first year of life, the other group (IO,) did not. Maxillary casts, made at birth, and at 15, 24, 48, 78 wk were digitised three-dimensionally. Before lip closure alveolar, midpalatal and posterior cleft width reduced significantly more in IO(+) than in IO(,). After lip closure, the alveolar cleft width reduced significantly more in IO(,). Until soft palate closure the slope of the palatal vault flattened significantly by IO. It is concluded that IO only has a temporary effect on maxillary arch dimensions that does not last beyond surgical soft palate closure. Therefore, infant orthopaedics as a tool to improve maxillary arch form could be abandoned. However, other outcome variables like facial and dental appearance, speech outcome, and cost-effectiveness need to be investigated further in order to assess the comprehensive effect of infant orthopaedics. [source]

Dental arch morphological and dimensional characteristics in Jordanian children and young adults with ,-thalassaemia major

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 2 2005
A. AL-WAHADNI
Summary. Objective. , The aim of this study was to examine the arch dimensions of Jordanian patients with ,-thalassaemia major in comparison with an unaffected control group. Methods. , The sample consisted of 24 patients who suffered from ,-thalassaemia major (mean age = 13·9 ± 3·1 years) and an unaffected control group (mean age = 13·5 ± 2·9 years) matched for dental age, sex, and incisor and molar relationships. The unaffected control group was randomly selected from four public schools in the Governate of Irbid-Jordan. Alginate impressions were taken of the maxillary and mandibular dental arches of all participants. All measurements of the arch dimensions were made on the casts using an electronic digital sliding calliper. Results. , In the mandibular arch, when compared with the patients with thalassaemia, the unaffected control group subjects showed a (statistically) significantly larger incisor width, larger arch depth, and larger left and right anterior arch lengths (1·18, 2·58, and 1·85 and 1·12 mm, respectively). In the maxillary arch, there was a statistically significant difference in the mean incisor width (± 2·16 mm), arch depth (± 3·14 mm), inter-molar width (± 1·21 mm) and in the left anterior arch length (± 1·97 mm). The canine widths, premolar widths, left and right posterior arch length, and curve of Spee of both arches showed no statistically significant differences between the two groups. Conclusion. , When compared to unaffected subjects, patients with ,-thalassaemia major exhibited: a narrower maxilla; a shorter maxilla and mandible; and smaller incisor widths for the maxillary and mandibular arches. [source]

Maxillary arch width in unoperated adult bilateral cleft lip and alveolus and complete bilateral cleft lip and palate

ORTHODONTICS & CRANIOFACIAL RESEARCH, Issue 2 2010
BS Latief
To cite this article: Latief BS, Lekkas C, Kuijpers MAR: Maxillary arch width in unoperated adult bilateral cleft lip and alveolus and complete bilateral cleft lip and palate Orthod Craniofac Res 2010;13:82,88 Structured Abstract Authors,,, Latief BS, Lekkas C, Kuijpers MAR Objectives,,, To study maxillary arch width in adult patients with bilateral cleft lip and alveolus (BCLA) or with complete bilateral cleft lip and palate (BCLP), who have not had any surgery. Setting and Sampling Population,,, Eighteen patients with BCLA, 13 patients with BCLP, and 24 controls from remote areas of Indonesia collected over 10 years. Materials and Methods,,, Dental casts were digitized three-dimensionally using an industrial coordinate measuring machine (CCM) (Zeiss Numerex; Carl Zeiss®, Stuttgart, Germany). Transversal distance between molars was measured on the tip of the distobuccal cusp and the tip of the mesiobuccal cusp, and for premolars and canines, the tip of the buccal cusps was recorded. Means and standard deviations were calculated for all variables. t -Test was used to determine whether the mean values of the cleft groups showed significant differences from each other and from the controls. Level of significance was set at p < 0.05. Results,,, Transversal arch dimensions in the BCLA group were comparable to the controls except at the canine level. Intercanine distance, which is close to the alveolar cleft, was 4.3 mm (SE 1.4) smaller in the BCLA group (p = 0.002). In the BCLP group, a comparable pattern was found. At the canine level, mean transversal width was 7.2 mm (SE 1.9) smaller compared to the control group, but no significant differences were found in the other transversal dimensions. Conclusions,,, Small differences are found in transversal dimensions in patients with BCLA and BCLP compared to a control group. Differences are most outspoken in the area near the cleft. [source]