Differences in Dental Arch Dimensions in a Sample of Kurdish Population among Different Occlusal Categories (original) (raw)
Related papers
Tooth size discrepancies and arch parameters among different malocclusions in a Jordanian sample
The Angle orthodontist, 2006
The objectives of this study were to determine the mean mesiodistal tooth width of the dentition, Bolton anterior and overall ratios, arch length, and arch width in the different malocclusions in a Jordanian sample. The mesiodistal tooth width, arch width, and length were measured on a total of 140 orthodontic models of school students aged 13-15 years of different occlusal relationships (Class I, Class II division 1, Class II division 2, and Class III malocclusions). Anterior and overall Bolton ratios were calculated. The mean and standard deviation were calculated. Student's t-test and analysis of variance were used for the statistical analysis. The results show that (1) females have smaller teeth than males; (2) Class III malocclusion showed larger teeth than the rest of the other occlusal categories; (3) no statistically significant differences were found in Bolton ratios between the different malocclusions; (4) Class II division 1 showed the narrowest maxillary arch compare...
2020
The current study aimed to find a prediction equation to estimate the arch perimeter (AP) depending on various arch dimensions including intercanine width (ICW), intermolar width (IMW), interpremolar width (IPMW), and arch length (AL) in a sample of the Kurdish population in Sulaimani City. The study sample was 100 pairs of preorthodontic dental casts. Calculations of dental arch dimensions and perimeter were performed by a digital vernier. Statistical analysis was performed via using the SPSS version 25 software. The developed prediction equation for the upper arch was Y = +1.3 × (arch length) + 1 × (intermolar width), whereas the equation for the lower arch was Y = +0.9 × (intermolar width) + 0.92 × (intercanine width). Paired t-test revealed no statistical difference between predicted and real arch perimeters. Two separate prediction equations for upper and lower arches were developed based on the arch length (AL) and intermolar width (IMW) for the maxillary arch, intermolar (IMW...
International Journal of Applied Dental Sciences, 2020
To determine the variations in mandibular arch morphology among different Angles' Classes of malocclusion using canine width to depth ratios. Material and methods: Canine width and depth linear measurements were performed on 93 study models to determine the arch form. Canine width to depth rations were calculated and compare with occlusal patterns and between genders. Results: The most common class was Class I (54.8%), more females (p<0.05) had Class I and II than males. Females significantly (p<0.05) recorded higher canine width: depth ratios, they had tapered and ovoid arch forms (p<0.05), opposite to males who had square arches (p<0.05). In females, tapered and ovoid forms predominated in Classes I and II arches. However, square form was recorded in males with Class III relations. Conclusion: The most common arch form in Class I was the ovoid, tapered form in Class II, and square form in Class III subjects.
Dental arch form and arch dimensions among a group of Egyptian children and adolescents
Bulletin of the National Research Centre
Background Growth and development of the dental arch is considered a continuous and complex biological process. During transition from primary to mixed then to permanent dentition, dental arch form, length and width vary, due to tooth movement and vertical growth of alveolar process. These naturally occurring changes, which happen in untreated individuals, have been used as a comparative standard to assist in diagnosis and treatment planning of children with malocclusion. Therefore, the aim of the current study was to analyze dental arch dimensions in Egyptian children and adolescents with normal occlusion in primary, mixed, and permanent dentitions as well as detection of the most common forms of the dental arches among a group of Egyptian children and adolescents. Results Results showed that lower and upper arch lengths showed increase during transition from mixed to permanent dentition. A small increase in lower anterior arch length was recorded during transition from primary (4....
The European Journal of Orthodontics, 2011
The purpose of this study was to establish normative data for mesiodistal tooth crown dimensions with respect to malocclusions and gender differences in Turkish sample. The subjects were randomly selected and assigned to three malocclusion groups according to Angle's classification. Each group consisted of 100 individuals between the ages of 13 and 18 years with the following distribution: Class I, 42 males and 58 females; Class II, 52 males and 48 females; and Class III, 51 males and 49 females. An electronic digital calliper was used to measure the mesiodistal tooth width from the right second permanent molar to the left second permanent molar on both upper and lower study casts. For statistical evaluation, one-and two-way analyses of variance and post hoc Tukey's honestly significant difference (HSD) tests were performed.
Comparison of the arch forms and dimensions in various malocclusions of the Turkish population
Open Journal of Stomatology, 2011
Objectives: The aim of this study is to determine the distribution of morphological differences in the clinical mandibular arch forms seen in Angle Class I, II and III malocclusions in Turkish population and to examine the effect of gender on arch dimension parameters. Material and methods: This study has been conducted on pretreatment mandibular study models of 600 individuals (362 girls, 238 boys) aged between 14 and 19. On the photocopies derived from these models, 4 linear and 2 proportional measurements have been made. The samples have been evaluated as square, ovoid and tapered (OrthoForm-3M Unitek) arch form templates. Results: The most frequent arch form encountered among all the groups was the tapered one (62.5%) followed by the ovoid (27.3%) and the square one (10.2%). Gender difference influences on morphological structure was apparent. Generally, compared with girls, arch width and depth were found to be more in boys. Conclusions: The most frequent arch form seen in Angle malocclusion groups was the tapered one, followed by the less frequent ovoid and square ones.
Longitudinal Changes in Dental Arch Circumference in Sulaimani City
European Scientific Journal, 2013
Background: Evaluation of dental arches is of great importance for definitive diagnosis and optimal craniofacial treatment. The circumference or perimeter is the most important dimension of the dental arch and it changes according to age and gender. This issue hasn't been conducted yet in sulaimani city; Aims: aim of the present study was to assess the dimensional changes in the dental arches occurring during the transitional period from mixed to permanent dentition in individuals with normal dentition. Methods: A group of fifty children with normal dentition aged 8-9 years were selected according to specific criteria in sulaimani city in kurdistan of iraq, dental arch dimensions were measured. Five years later, a second examination and measurement was performed to record the changes in dental arches. The data was analyzed by using statistical package for social sciences (SPSS, version 15) program for obtaining the descriptive statistics including the mean, and standard deviation, also the inferential statistics (t-test) was applied to test the significance difference between the dimensions. Results: The study showed an increase in the arch perimeter of the maxilla in the transition from mixed to permanent dentition for both males and females whereas in the lower arch it was the reverse. The arch perimeter differences between maxillary and mandibular arches show high significancy in both mixed and permanent dentitions P(0.00), P(0.00). There was asymmetry in the ach length between right and left side for both mixed and permanent dentition and most of the measurements of the permanent dentition showed high significant differences between right and left sides. There was a significant difference P(0.00) in maxillary and mandibular left and right incisor-canine distance (I-C) between males and females.
Comparison of tooth size discrepancies among different malocclusion groups
The European Journal of Orthodontics, 2006
This retrospective investigation was designed to compare tooth size discrepancies among subjects with different skeletal malocclusions in an orthodontic population. The study employed the pretreatment models of 200 patients (100 males, 100 females, aged from 14 to 20 years) selected from the records of the Orthodontic Department, Shiraz Dental School. The subjects were from four malocclusion groups, Class I, Class II division 1, Class II division 2, and Class III, with the corresponding skeletal characteristics. Each group comprised 50 healthy individuals (25 males, 25 females). The mesio-distal dimensions of teeth were measured using digital electronic callipers (accurate to 0.01 mm) and the Bolton indices were determined. The data were statistically analysed using analysis of variance and Duncan's multiple range test, with the level of signifi cance set at P < 0.05.
2018
Aim & Objectives: to compare the intercanine, intermolar and alveolar width among Class I, Class II div 1, Class II div 2 and Class III malocclusion for arch widths, the width of the maxillary and mandibular arches, gender dimorphism within groups, and gender comparisons in central India population. Methods: a cross-sectional study was comprised of patients pre-treatment study casts of 60 Class I, 40 class II div 1, 30 class II div 2 and 30 class III malocclusions. An electronic digital Vernier caliper with fine tips measuring within 0.01 mm (Aerospace) is used in this study to measure the parameters on the maxillary and mandibular study models. All subjects resided in central India with no history of orthodontic treatment. An analysis of variance test was used to compare the different malocclusion groups and genders. Result: Among the all comparison groups class I malocclusion group showed maximum maxillary inter canine, inter molar and alveolar width while class III group showed m...
Al-Rafidain Dental Journal, 2021
Aims: The study aimed to evaluate the overall and anterior Bolton's ratio between females and males of the Kurdistan population, and then compare it to Bolton's original ratio. Materials and methods: This crosssectional study consisted of 160 orthodontic models (80 males, 80 females) that randomly selected from the Kurdistan Iraq population for patients seeking orthodontic treatment, ranging in age from 16 to 34 years. After evaluating the width of each tooth separately using digital caliper, anterior and total ratios were calculated by a formula presented by Bolton. Results: The study's overall Bolton's ratio was significantly higher for both females and males at 92.54 and 91.73, respectively, when compared to that of Bolton's original value of 91.3; the anterior Bolton's ratio was also significantly higher at 79.97 for males & 79.22 for females, when compared to that of Bolton's original value of 77.2. The high significant difference was observed between the current study and Bolton's ratios, with p-value of 0.01, whereas no significant gender differences in any malocclusion group have been found. Conclusions: No gender effect on Bolton's ratios among all Angle's classification types.