Maxillary Dental Arch Dimensions Research Articles

The Relation among Teeth and Maxillary Dental Arch Dimensions with Anterior Teeth Angulation and Inclination.

Objectives This study aimed at finding out whether anterior teeth angulation and inclination have a relationship with the maxillary teeth and dental arch dimensions. Methods Fifty study models with normal occlusion were selected from the archive of the Department of Orthodontics at Baghdad Dental Faculty. Maxillary dental arch width and length at different points were determined in addition to measuring anterior teeth angulation, inclination, crown thickness, overjet, overbite, and Bolton's ratios. The unpaired t-test and Pearson's correlation coefficient test were used for data analysis. Results No statistical gender differences were reported in all measurements except the dental arch widths and length where males had significantly higher mean values. Only the maxillary incisor's inclination showed a direct weak significant correlation with the total arch length. Conclusions The inclination of upper incisors had a minimal effect on increasing dental arch length.

Association between snoring and deciduous dental development and soft tissue profile in 3-year-old children

The aim was to study the association between snoring and development of occlusion, maxillary dental arch, and soft tissue profile in children with newly completed deciduous dentition. Thirty-two (18 female, 14 male) parent-reported snorers (snoring ≥3 nights/week) and 19 (14 female, 6 male) nonsnorers were recruited. Breathing preference (nose or mouth) was assessed at the mean age of 27months by otorhinolaryngologist. At the mean age of 33months, an orthodontic examination was performed, including sagittal relationship of second deciduous molars, overjet, overbite, and occurrence of crowding and lateral crossbite. Bite index was obtained to measure maxillary dental arch dimensions (intercanine and intermolar width, arch length). A profile photograph was obtained to measure facial convexity. No significant differences were found between nonsnorers and snorers in any of the studied occlusal characteristics or in measurements of maxillary dental arch dimensions. Snorers were found to have a more convex profile than nonsnorers. Occurrence of mouth breathing was more common among snorers. Parent-reported snoring (≥3 nights/week) does not seem to be associated with an adverse effect on the early development of deciduous dentition, but snoring children seem to have more convex profile than nonsnorers. Snoring is a mild sign of sleep-disordered breathing, and in the present study its short time lapse may not have had adequate functional impact on occlusion.

Do gender and age influence hard palate dimensions? A systematic review.

Analyze the influence of gender and age on hard palate dimensions and verify the reference parameters available in the literature. Two reviewers independently performed a search at the Cochrane Library, PubMed-Medline and Web of Knowledge databases using descriptors according to the syntax rules of each database. Observational or experimental human studies evaluating the dimensions of the hard palate or maxillary dental arch, with at least one transverse, vertical or sagittal plane measurement, in normal occlusions or class I malocclusions, and comparisons of the dimensions between genders and/or ages. Descriptive analysis with the following subdivisions: design, sample, evaluation instruments, measurements in millimeters, and statistical analysis. Quality of the included studies was verified by the Newcastle - Ottawa Quality scale. Eighteen studies were selected and 11 presented results for hard palate or maxillary dental arch dimensions according to gender, six in age and gender and one in age only. The dimensions were larger in males and progressive increase in the measurements was observed from birth to the permanent dentition period.

Association between 3D palatal morphology and upper arch dimensions in buccally displaced maxillary canines early in mixed dentition.

To evaluate the association between maxillary dental arch transverse dimensions, palatal depths, palatal area and volume with buccally displaced canine (BDC) in mixed dentition subjects when compared to non-BDC subjects using laser scanner 3D technology. Sixty Caucasian subjects, 8-11 years of age (mean, 9.26 ± 1.48 years), were included. In each group (BDC and non-BDC) 30 children were matched. Digital dental casts were obtained using a 3 Shape D700 laser scanner. Intercanine and intermolar widths (cusp and gingival levels), anterior and posterior palatal depth (cusp level), palatal surface area and volume were measured. An independent sample Student's t-test and an ANOVA were undertaken with significance level set as P < 0.05. Intercanine widths at the cusp (1.76 mm; P = 0.020) and the gingival level (1.6 mm; P = 0.006), palatal area (133 mm2; P = 0.021) and volume (790 mm3; P = 0.046) were significantly lower in the BDC compared to the control group. A smaller part of the subjects was in late mixed dentition phase. To overcome this limitation a matched control group was used. Some subjects did not have some teeth because of the transition phase which might have had an influence on the dental measurements. However, these subjects were not excluded to avoid introducing a bias. 3D evaluation of the maxillary arch and palate highlighted significant differences between BDC and non-BDC mixed dentition subjects. Maxillary dental arch dimensions and palate morphology may allow early identification and prevention of maxillary canine impaction.

Maxillary Dental Arch Dimensions in a Sample of Iraqi Children at the Mixed Dentition Stage

The purpose of this study was to estimate the maxillary arch dimensions in a selected sample of Iraqi children from Baghdad city at the mixed dentition stage, aged 8 – 9 years. Measurements were picked out from 50 study models for the whole selected sample using Auto sketch computerizing program, then The data collected were subjected to a statistical analysis. The results show that the mean values of maxillary arch dimensions of Iraqi children represent a median between North American and Indian samples. The mean values for both maxillary arch lengths and widths for the children of the present study shows lower values than that estimated from previous Iraqi studies done on older age groups, the findings of this study can be used as a basis for future Iraqi studies in other cities of Iraq rather than the capital for the same age group.

Predictors of long-term stability of maxillary dental arch dimensions in patients treated with a transpalatal arch followed by fixed appliances.

BackgroundThe aim of this retrospective study was to identify which dental and/or cephalometric variables were predictors of long-term maxillary dental arch stability in patients treated with a transpalatal arch (TPA) during the mixed dentition phase followed by full fixed appliances in the permanent dentition.MethodsThirty-six patients, treated with TPA followed up by full fixed appliances, were divided into stable and relapse groups based on the long-term presence or not of relapse. Intercuspid, interpremolar and intermolar widths, arch length and perimeter, crowding, and upper incisor proclination were evaluated before treatment (T0), post-TPA treatment (T1), post-fixed appliance treatment (T2), and a minimum of 3 years after full fixed appliances’ removal (T3). A binary logistic regression was performed thereafter to evaluate the impact of the dental arch and cephalometric measurements at T1 and the changes between T0 and T1 as predictive variables for relapse at T3.ResultsThe proposed model explained 42.7 % of the variance in treatment stability and correctly classified 72.2 % of the sample. Of the seven predictive variables, only upper anterior crowding (p = 0.029) was statistically significant. For every millimeter of decreased crowding at T1 (after TPA treatment/before starting the fixed orthodontic treatment), there was an increase of 3.57 times in the odds of having stability.ConclusionsThe best predictor of relapse was maxillary crowding before treatment. The odds of relapse increase by 3.6 times for every millimeter of crowding at baseline.

Evaluation of the Occlusion and Maxillary Dental Arch Dimensions in the Mixed Dentitions of Yemeni Population

Determination the dental arch dimensions in human populations is necessary for various fields of dental sciences. This study was designed to evaluate the maxillary dental arch dimensions of Yemeni children aged (10-12) years. The sample was gathered from primary and intermediate school in Sana'a city, Yemen. Clinical examination was performed on 200 subjects (100 males and 100 females) that fulfillment the criteria of this study. The examination was carried out for subjects that have either normal occlusion or class I with anterior dental crowding. Pairs of studying models for the dental arch was constructed and evaluated by special software for digitizing and analyzing the data. This study reported that class I with anterior dental crowding is still high incidence, particularly for females, in Yemeni Population. Therefore, more prevention protocols and dental health educational programs about orthodontics needs are essential in Yemen.

Early alveolar bone grafting has a negative effect on maxillary dental arch dimensions of pre‐school children with complete unilateral cleft lip and palate

To evaluate maxillary dental arch dimensions in pre-school children with a complete unilateral cleft lip and palate (CUCLP) after early alveolar bone grafting. Intercanine and intermolar widths, length of dental arch and mesiopalatal inclination of both maxillary segments were measured directly on the dental casts of 42 children (27 boys and 15 girls; mean age = 5.2 years, SD 0.5; Early-grafted group), 30 children (18 boys and 12 girls; mean age = 5.8 years, SD 0.8; Non-grafted group), and 40 children (25 boys and 15 girls, mean age = 5.8, SD 0.4; non-cleft Control group). Children from Early-grafted and Non-grafted groups had a CUCLP repaired with a one-stage closure of the entire cleft. An alveolar bone grafting was performed in the Early-grafted group between 2 and 4 years (mean = 2.4, SD 0.6). A one-way anova model with post hoc Tukey's multiple comparison procedures were used to identify intergroup differences. The mesiopalatal inclination of the lesser segment in the Early-grafted group was decreased in comparison with the Non-grafted and Control groups. The intercanine width had a tendency to be reduced in the Early-grafted group relative to Non-grafted group. Early bone grafting results in a larger collapse of the lesser segment than bone grafting carried out between 9 and 12 years of age.

Maxillary Dental Arch Dimensions in 6-Year-Old Children with Articulatory Speech Disorders

Aims: To evaluate maxillary dental arch dimensions in 6-year-old children with articulatory speech disorders and to compare their dental arch dimensions with age- and sex-matched controls without speech disorders. Methods: Fifty-two children (15 girls) with errors in the articulation of the sounds /r/, /s/ or /l/ were compared retrospectively with age- and sex-matched controls from dental casts taken at a mean age of 6.4 years (range 5.0–8.4). All children with articulatory speech disorders had been referred to City of Helsinki Health Care, Dental Care Department by a phoniatrician or a speech therapist in order to get oral-motor activators (removable palatal plates) to be used in their speech therapy. A χ²-test and paired Student’s t tests were used in the statistical analyses. Results: The children with articulatory speech disorders had similar maxillary dental arch widths but smaller maxillary dental arch length than the controls. Conclusion: This small series suggests that 6-year-old children with articulatory speech disorders may have decreased maxillary dental arch length.

Analysis of the changes in maxillary dental arch dimensions between Anglo-Saxon and modern times.

Maxillary dental arch dimensions were measured in skulls from Anglo-Saxons, and 16th to 18th century Londoners, 18th century Glasgow skulls, and in skulls of modern Britons from the West Midlands. The data were analyzed by principal coordinate analysis, and the results showed that the skulls from 16th to 18th century London and 18th century Glasgow populations were similar in respect of arch dimensions, but were dissimilar to both Anglo-Saxon and modern West Midland populations.