scholarly journals Bolton tooth size analysis in a sample of Sudanese adults

2021 ◽  
Vol 24 (2) ◽  
Author(s):  
Raja AbdAlgadir Mustafa ◽  
Amal Hussein Abuaffan
Keyword(s):  
Gender Differences ◽  
University Students ◽  
Size Analysis ◽  
Tooth Size ◽  
Normal Occlusion ◽  
Significant Difference ◽  
Males And Females ◽  
Overall Ratio ◽  
Mandibular Teeth ◽  
Digital Caliper

Introduction: A correct proportion between the upper and lower teeth is critical to achieving proper occlusal interdigitation, ideal overjet, and good molar intercuspation at the end of orthodontic treatment. Objectives: To determine the anterior and overall Bolton’s ratio in the Sudanese population, investigate gender differences in tooth size ratios, and to compare these results with Bolton’s original ratio norm. Material and Methods: The sample consisted of dental casts of 104 Sudanese University students with normal occlusion (52 females, 52 males), aged between 16-26 years randomly selected from AL- Neelain University. An electronic digital caliper was used to measure the mesiodistal tooth size of the maxillary and mandibular teeth anterior to the second molars. These measurements were then used to obtain Bolton’s ratio. Mean, range, and standard deviation of the anterior and overall ratios were computed for each subject. T-Tests were used to compare gender differences and to investigate differences between the results of this study and Bolton’s original ratio. Results: Anterior and overall Bolton ratios for males were 78.43±2.44 and 93.901±9.8 and for females were 78.29±2.6 and 91.67±3.3 percent, respectively. There were no statistically significant differences between males and females for the anterior and overall ratios P>0.05. The anterior and overall Bolton’s ratios among Sudanese University students were 78.37 ± 2.54, and 92.79± 7.43 percent, respectively. statistically significant difference between this study and Bolton’s study were found in both anterior and overall ratio P<0.05. Conclusion: Bolton’s mean ratios may not be applicable to Sudanese. Keywords Bolton’s ratio; Sudanese population; tooth-size.

Intermaxillary tooth size discrepancies among different malocclusion classes: a comparative study

2002 ◽  
Vol 26 (4) ◽  
pp. 383-387 ◽  
Author(s):  
Eman Alkofide ◽  
Hayder Hashim
Keyword(s):  
Size Analysis ◽  
Tooth Size ◽  
Class Iii ◽  
Mean Values ◽  
Normal Occlusion ◽  
Significant Difference ◽  
Important Diagnostic Tool ◽  
Males And Females ◽  
Anterior Ratio ◽  
Overall Ratio

The purpose of this study is to determine whether a difference exists in intermaxillary tooth size among different malocclusion groups in Saudi patients. The study consisted of 240 pretreatment orthodontic casts (Sixty cases in each malocclusion class, in addition to normal occlusion). The results of the study shows no significant difference in the incidence of tooth size discrepancies for the overall ratio and anterior ratio between the different malocclusion groups, except for the anterior ratio in class III malocclusion. Further, no statistical significant difference was observed between males and females. When the mean values of the present study were compared to that of Bolton's, a significant difference was found in all the malocclusion classes.We can conclude from this study that Bolton tooth size analysis is an important diagnostic tool, and should be taken into consideration before initiation of orthodontic treatment.

scholarly journals Comparison and testing the reliability of two non-radiographic techniques of mixed dentition space analysis in Nepalese population

2017 ◽  
Vol 13 (4) ◽  
pp. 410-415
Author(s):  
Rajeev Kumar Mishra ◽  
Vashant Devagiri
Keyword(s):  
Regression Equation ◽  
T Test ◽  
Mixed Dentition ◽  
Tooth Size ◽  
Significant Difference ◽  
Males And Females ◽  
The Difference ◽  
Predicted Values ◽  
Digital Caliper ◽  
Mixed Dentition Analysis

Background & Objectives: Mesio-distal tooth size-arch length discrepancy is one of the major sources of malocclusion. Accurate prediction of space required for unerupted tooth can help in early interception of developing malocclusion. Various methods has been proposed for prediction of mesio-distal  tooth size however accuracy of such methods  in population groups other than that on which these methods are based remains questionable. The aims and objectives   of this study were  to test the reliability of Moyer’s and Tanaka Johnston mixed dentition analysis in Nepalese  population, to construct prediction  tables for Nepalese  population if these methods were found  not reliable.Materials & Methods: Study models of 77 subjects (31 males,46 females) fulfilling the inclusion criteria were retrieved from department archive.  Tooth dimensions were measured using electronic digital caliper. Moyer’s and Tanaka and Jhonston methods were applied to predict   the   mesio- distal tooth size   of canines and premolars. The predicted values were compared with the actual mesio-distal mesio-distal size. A regression equation based on actual canine and premolar mesio-distal dimensions and sum of mandibular permanent incisors was also developed.Results: Independent t-test showed that there was no significant difference between mesio-distal tooth size in males and females. Paired t-test showed that there was no difference in mesio-distal tooth  size between right and left sides of the arch. Tanaka – Johnston analysis overestimated the  mesio-distal size in both males and females. Moyer’s method at 75% overestimated the mesio-distal size  in male and female and the difference were statistically significant  while at 50% it underestimated the tooth  size in females.Conclusion: Moyer’s and Tanaka and Jhonston method of mesio-distal size prediction are inaccurate when applied in Nepalese population. A new regression equation to predict the size of tooth has been presented.

scholarly journals Bolton Ratio of Different Angle’s Classifications in a School Children Sample of Erbil City

2020 ◽  
Vol 10 (2) ◽  
pp. 87-97
Author(s):  
Amanj R. Ibrahim ◽  
Zana Q. Omer ◽  
Hasan S. Hasan ◽  
Walaa M. Saleem Almola
Keyword(s):  
Numerical Data ◽  
Class Ii ◽  
Class Iii ◽  
Normal Occlusion ◽  
Significant Difference ◽  
Distal Surface ◽  
Males And Females ◽  
The Mean ◽  
Anterior Ratio ◽  
Overall Ratio

Aims of this study were to determine both the Bolton anterior and overall ratios in a representative sample of Erbil schoolchildren of Normal occlusion and Cl I, Cl II div I, div II, and Cl III malocclusion, also to find if there are any gender differences. Numerical data were obtained, comprised of 320 samples study casts of students with a mean age of 13–15 years selected from different schools in Erbil City. The casts were divided into 5 groups according to the type of malocclusion: Normal (n = 64), Cl I (n = 64), Class II div I (n = 64), Class II div II (n = 64), and Class III subjects (n = 64). The measurement of the greatest mesiodistal width of the teeth was performed using digital Vernier directly on the study casts, from the distal surface of the left first molar to the distal surface of the right first molar. The overall and anterior ratios between the maxillary and mandibular teeth were computed and evaluated using Bolton’s method. The results revealed that the mean anterior ratio (78.863) was higher and statistically signifi cantly different from anterior Bolton’s (77.2) and also the mean overall ratio was not statistically signifi cant different from Bolton’s ratio (91.3) (P = 0.239), with respect to the overall and anterior ratios among all the groups, statistically significant differences were found. Differences between genders were analyzed using a t-test. The results showed that there were no signifi cant differences between males and females. There were non-significant differences between the findings of the present study and those of Bolton’s study for overall ratio and anterior ratio, but among all five classifications, there was a significant difference of Erbil population not similar to Bolton ratio and there was no significant difference between males and females.

A Study on Bolton Anterior Tooth Size Discrepancies among Different Malocclusion Groups

2013 ◽  
Vol 1 (2) ◽  
pp. 1-4
Author(s):  
AW Ali ◽  
MZ Hossain
Keyword(s):  
Cross Sectional Study ◽  
Normal Group ◽  
Anterior Tooth ◽  
Tooth Size ◽  
Class Iii ◽  
Cross Sectional ◽  
Normal Occlusion ◽  
Significant Difference ◽  
The Mean ◽  
Bangladeshi Population

Aim: To investigate the correlation between anterior tooth size discrepancies among Angle's Class l, ll, lll malocclusions and corresponding normal occlusion, as well as their prevalence in Bangladeshi population. This study would act as a reference for diagnosis, treatment planning and assessment of prognosis in some orthodontic cases. Methods: This cross sectional study was conducted in the Department of Orthodontics & Dentofacial Orthopedics, Dhaka Dental College & Hospital. A total number of 200 subjects were selected in Angle's Class l, ll, lll and corresponding normal group. Each group had 50 subjects with males and females. A chi-square test was performed to statistically compare the prevalence of anterior tooth size discrepancies among Angle's Class l, ll, lll malocclusions and corresponding normal occlusion and two genders. Analysis of variance was used to compare the mean Bolton anterior tooth size ratios as a function of angle classification and gender. Statistical differences were determined at the 95% confidence level (p< 0.05). Results: No significant difference was observed in the mean Bolton anterior ratio between normal group and class-I malocclusion group (p = 0.343). Significant differences were observed between Class-II malocclusion and normal group (p=0.001), and also between Class-III malocclusion and normal group (p = 0.001). Individuals with Angle Class lll and Class ll malocclusions showed significantly greater prevalence of tooth size discrepancy than Class l malocclusion and corresponding normal group. Conclusion: The great diversity and ethnic mix of Bangladeshi population should alert our orthodontist to use Bolton analysis as an important diagnostic tool and become aware of the moderate variations that may be present and treated. It may somehow guide planning of this type of study in future. DOI: http://dx.doi.org/10.3329/bjodfo.v1i2.15982 Ban J Orthod & Dentofac Orthop, April 2011; Vol-1, No.2, 1-4

scholarly journals The Level of Psychological Security among Sample of Nizwa University students in the Sultanate of Oman: مستوى الأمن النفسي لدى عينة من طلبة جامعة نزوى في سلطنة عمان

2019 ◽  
Vol 3 (30) ◽  
Author(s):  
Mohammed Nasser Said Al-Sawafi
Keyword(s):  
University Students ◽  
Sultanate Of Oman ◽  
Significant Difference ◽  
Descriptive Approach ◽  
Males And Females ◽  
High Level ◽  
The University

    This study aimed to find out the level of Psychological Security of Nizwa University students and to find out the differences in level of Psychological Security according to gender (males/ females), the sample included (238) males and females. In order to achieve the objectives of the study, the descriptive approach was used. The researcher used the Maslow scale for the sense of Psychological Security and interpolation by Dawani and Dirani (1983) in the Abdullah’s study (1996) after verifying its validity and stability. The study sample (238) students from Nizwa University in the Sultanate of Oman were randomly chosen. The findings of the study could be summarized as the following: there is a high level of Psychological Security with Nizwa University students according to the comprehensive Psychological Security scale with a median (2.24) feeling with Psychological Security compares to threat with average (2.29) and feeling love to hatred with average (2.25) feeling with loyalty to loneliness with average (2.19), there is a significant difference at the level of α=0.05 between males and females in favour of the males. In light of the results, a number of recommendations and proposals were submitted to enhance the level of psychological security among students of the University of Nizwa, and the general Omani and Arab universities.    

scholarly journals Accuracy of Four Tooth Size Prediction Methods on Malay Population

2012 ◽  
Vol 2012 ◽  
pp. 1-4
Author(s):  
Belal Khaled Mahmoud ◽  
Saifeddin Hamed I. Abu Asab ◽  
Haslina Taib
Keyword(s):  
Prediction Methods ◽  
Tooth Size ◽  
Prediction Equations ◽  
Statistical Significant Difference ◽  
Crown Width ◽  
Dental Pathology ◽  
Southern Chinese ◽  
Significant Difference ◽  
Malay Population ◽  
Digital Caliper

Objective. To examine the accuracy of Moyers 50%, Tanaka and Johnston, Ling and Wong and Jaroontham and Godfrey methods in predicting the mesio-distal crown width of the permanent canines and premolars () in Malay population. Materials and Methods. The study models of 240 Malay children (120 males and 120 females) aged 14 to 18 years, all free of any signs of dental pathology or anomalies, were measured using a digital caliper accurate to 0.01 mm. The predicted widths () in both arches derived from the tested prediction equations were compared with the actual measured widths. Results. Moyers and Tanaka and Johnston methods showed significant difference between the actual and predicted widths of () for both sexes. Ling and Wong method also showed statistically significant difference for males, however, there was no significant difference for females. Jaroontham and Godfrey method showed statistical significant difference for females, but the male values did not show any significant difference. Conclusion. For male Malay, the method proposed by Jaroontham and Godfrey for male Thai proved to be highly accurate. For female Malay, the method proposed by Ling and Wong for southern Chinese females proved to be highly accurate.

Comparison of Maxillary Central Inclination, Crown Angulation and Tooth Size Variation in Aesthetic and Non-aesthetic Smiles, A Cross Sectional Study

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Tarulatha Revanappa Shyagali ◽  
Rachita Singh ◽  
Anil Tiwari ◽  
Abhishek Gupta
Keyword(s):  
Size Variation ◽  
Cross Sectional Study ◽  
Tooth Size ◽  
Central Incisor ◽  
Cross Sectional ◽  
Maxillary Central Incisor ◽  
Normal Occlusion ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
The Aesthetic

Background: An attractive smile is often attributed to incisor alignment and proclined or retroclined incisors could contribute to a less aesthetic smile. Objectives: This study was aimed to evaluate the maxillary central incisor crown inclination, crown angulation and tooth size variation in aesthetic and unattractive smiles. Methods: This study was conducted among 100 females (equally divided into aesthetic and unaesthetic smile groups), aged between15 - 25 years, with Angle’s Class I normal occlusion and balanced profiles. Variations in maxillary central incisor crown inclination and angulation were measured on lateral cephalograms, photographs and the study models of the subjects. Variations in tooth morphology were also evaluated by measuring crown height and width in both groups. Mann-Whitney U test was performed to evaluate the difference between the aesthetic and unaesthetic smiles. P < 0.05 was considered as significant. Results: This study showed that incisor angulation was significantly higher in the unaesthetic group compared to the aesthetic group (P < 0.001). However, there was no statistically significant difference for the incisor inclination relative to the Palatal Plane between the aesthetic and unaesthetic smile groups (P = 0.086). In addition, there were significant differences between the aesthetic and the non-aesthetic groups regarding the central incisor height (P < 0.05). Conclusions: The findings of this study indicate that the possible variations in aesthetics are related to the ethnic elements that are associated with differences in crown angulations, as well as tooth size.

scholarly journals THE RELIABILITY OF THE BOLTON RATIO WHEN APPLIED TO THE INDONESIAN POPULATION

2017 ◽  
Vol 10 (10) ◽  
pp. 176
Author(s):  
Joko Kusnoto
Keyword(s):  
T Test ◽  
Tooth Size ◽  
Crown Width ◽  
Indonesian Population ◽  
Significant Difference ◽  
The Mean ◽  
Anterior Ratio ◽  
Overall Ratio ◽  
Student’S T ◽  
Student’S T Test

  Objective: The objective of this study is to determine whether Bolton ratio can be applied clinically to the Indonesian population and to determine a more suitable Bolton ratio for the Indonesian population.Methods: This study was conducted on 120 readily available study models of treated cases comprising 37 males and 83 females. Two investigators separately measured the mesiodistal crown width of maxillary and mandibular tooth on each study model using sliding calipers. According to Bolton’s method, the overall and anterior ratios from each sample were calculated and the mean was generated. Using Student’s t-test with a 95% confidence interval, the investigators compared whether there is a significant difference between the ratio from Bolton’s samples and the ratio from the Indonesian samples.Results: The result of this study showed that, for Indonesian samples, the overall ratio is 89.7±2.05, while the anterior ratio is 76.4±2.76. Student’s t-test showed that there is a statistically significant difference (p<0.05) between the results of this study and that of Bolton’s study for both the anterior and overall ratios.Conclusion: It can be concluded that there is a difference between Indonesian population and Caucasian population in tooth size and Bolton ratio value. Therefore, original Bolton ratio value cannot be used as an accurate diagnostic tool for Indonesian population.

scholarly journals Analysis of Interarch Tooth Size Relationship in Nepalese Subjects with Normal Occlusion and Malocclusions

2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Rajeev Kumar Mishra ◽  
Dashrath Kafle ◽  
Rahul Gupta
Keyword(s):  
Study Groups ◽  
Class Ii ◽  
Class I ◽  
Tooth Size ◽  
Class Ii Malocclusion ◽  
Normal Occlusion ◽  
Size Discrepancy ◽  
Clinically Significant ◽  
Anterior Ratio ◽  
Overall Ratio

Introduction. A proportional relationship between the maxillary and mandibular teeth size is required for achieving good finish with proper overjet and overbite postorthodontic treatment. The aims and objectives of this study were to determine the anterior and overall Bolton’s ratio in Nepalese population, to compare Bolton’s ratio between subjects with normal occlusion, Class I malocclusion, and Class II malocclusion, to compare these results with Bolton’s norm, and to determine the frequency of clinically significant (beyond 2 SD) tooth size discrepancy compared to Bolton’s norm. Materials and Methods. The study models of the subjects with normal occlusion and Angle’s Class I malocclusion and Class II malocclusion and fulfilling the inclusion criteria were retrieved from department archives. An electronic digital caliper was used to measure mesiodistal tooth size of the maxillary and mandibular teeth anterior to the second molars. The study sample of 120 study models consisted of the normal occlusion group (n = 31), Class I malocclusion group (n = 47), and Class II malocclusion group (n = 42). These measurements were then used to obtain Bolton’s ratio in three groups of subjects. Bolton’s ratio of study groups was compared with each other and with Bolton’s original ratio. Results. The differences in tooth size ratio of the study groups were not significant statistically, when the groups were compared on the basis of malocclusion or gender. Statistically significant differences were exclusively observed between the study groups and Bolton’s original sample for the anterior ratio. The frequency of the clinically significant tooth size ratio discrepancy was lower for the overall ratio (9.1%) compared to the anterior ratio (22.5%). Conclusions. Bolton’s analysis on the Nepalese population sample shows that there was no significant difference observed on the anterior and overall tooth size ratios when these were compared based on Angle’s malocclusion classes or gender. The clinically significant anterior tooth size discrepancy was more prevalent than that of the overall ratio.

scholarly journals Applicability of bolton’s tooth size ratios among mediterranean, japanese and japanese-brazilian populations

2017 ◽  
Vol 15 (4) ◽  
pp. 269 ◽  
Author(s):  
Karine Laskos Sakoda ◽  
Arnaldo Pinzan ◽  
Guilherme Janson ◽  
Sérgio Elias Neves Cury
Keyword(s):  
T Test ◽  
Brazilian Population ◽  
Tooth Size ◽  
Normal Occlusion ◽  
Different Populations ◽  
Untreated Individuals ◽  
Dental Cast ◽  
Japanese Ancestry ◽  
Digital Caliper ◽  
Brazilian Populations

Objective: The aim of this study was to determine if Bolton’s tooth size ratios can be applied to Mediterranean, Japanese and Japanese-Brazilian populations. Materials and methods: The sample comprised 90 pairs of dental casts of untreated individuals with normal occlusion, divided into 3 groups according to ethnical characteristics: White (30 Mediterranean descendant subjects, with a mean age of 13.64 years), Japanese (30 subjects with Japanese ancestry, with a mean age of 15.63 years)  and Japanese-Brazilian (30 Japanese-Brazilian subjects, with a mean age of 13.96 years). A digital caliper was used to measure the maxillary and mandibular mesiodistal widths from first molar to first molar on each dental cast. The anterior and overall tooth size ratios were calculated. T test was applied for comparisons between Bolton standards and the ethnical groups for anterior and overall ratios. Results: Only the Japanese-Brazilian group showed significantly greater ratios than Bolton standards. Conclusion: It was concluded that Bolton’s ratios are not applicable to the Japanese-Brazilian population. Therefore, it is suggested that Bolton’s ratios may not be suitable for different populations.

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