Anterior Ratio Research Articles

Anterior Tooth Discrepancy in Different Bangladeshi Malocclusion Group at BSMMU

Anterior tooth discrepancy, an important clinical orthodontic tool to manage malocclusions, may vary on different race, ethnicity and gender. Therefore this study on anterior tooth discrepancy of Bangladeshi malocclusion groups were formulated to calculate and set up a standard norm, and to evaluate the gender discrepancy. A cross sectional type study was done among 207 pretreated dental casts (60 male, 147 female) of malocclusion patient at the Department of Orthodontics, Faculty of Dentistry, BSMMU, Bangladesh. Bolton anterior ratio were measured and compared statistically (in the Angle’s group of malocclusion). No significant anterior discrepancy was observed between Bangladeshi male and female groups. A similar value for anterior discrepancy was observed in neighboring countries.J Bangladesh Coll Phys Surg 2015; 33(4): 191-194

Intermaxillary tooth size discrepancy in a Pakistani population: A stereomicroscope versus digital caliper.

Objective:Comprehensive diagnosis and treatment planning are essential in a successful orthodontic practice. The purpose of this study is to determine and compare intermaxillary tooth size discrepancy (IMTSD) using traditional digital caliper (DC) measurement on plaster dental models and stereomicroscopic digital dental models (SM).Materials and Methods:The samples were randomly selected from different states of Pakistan. Total 7168 variables were measured on plaster dental casts (128) and SM digital dental models (128) according to the selection criteria. For IMTSD, the 6 variable measured as for anterior tooth size (maxilla, mandibular), overall tooth size (maxilla, mandibular), Bolton's anterior ratios (BAR), and Bolton's overall ratios (BOR). The independent t-test and ANOVA were used for statistical analyses.Results:Significant sexual disparities in the sum of anterior tooth size and overall tooth size via DC and SM methods. No significant sexual disparities for BAR and BOR. No statistically significant differences were found in BAR and BOR between DC and SM. No significant differences were found on IMTSD ratio among different arch length and arch perimeters groups.Conclusions:Norms were developed based on DC and SM for IMTSD. Sexual disparities were observed in the sum of teeth size. However, no significant differences in BAR and BOR for IMTSD between the two methods.

Measurments of Bolton’s Tooth Width Ratios in Karnataka Population: A Preliminary Study

Aim: This study was conducted to establish the Bolton’s ratios’ norms ((The mean Overall Ratio (OR) and Anterior Ratio (AR) norms)) in 100 Karnataka subjects and to compare it with the overall ratio and anterior ratio of the Bolton’s analysis which would be an aid in diagnosis and treatment planning of orthodontic cases. It will also help in determining functional and esthetic outcome of the case. Methodology: Epidemiological survey was carried out for 100 subjects (50 males and 50 females), 14-25 years of age. The study groups were from Karnataka state in India. Every individual was assessed for occlusal traits and good quality impressions were taken for 100 selective individuals. Mesiodistal tooth dimensions were measured from right first permanent molar to left first permanent molar in maxillary and mandibular arches. Measurements were taken using digital vernier caliper. Anterior and overall ratio were calculated for each model. Data was statistically analysed by using statistical package for social sciences (SPSS) software.

Does the maxillary anterior ratio in Korean adults follow the Golden Proportion?

PURPOSEThe purpose of this study was to determine the effect of changes in the horizontal plane angle on the mesiodistal width ratios of the maxillary anterior teeth during the acquisition of frontal view photographs, derive these ratios for Korean adults on the basis of the data obtained, and analyze them using the Golden Proportion as a reference.MATERIALS AND METHODSIn experiment I, 30 plaster casts were mounted on an articulator and positioned on the angle-measuring device with a center setting of 0°. The device was rotated to 10° in 1° increments in a counterclockwise direction. At each angle, photographs were obtained and analyzed. Experiment II was based on 60 patients who visited the Department of Prosthodontics at Kyungpook National University Dental Hospital from February 2012 to February 2015. The patients were divided into three groups [Male (M), Female (F), Total (M + F)]. Frontal views were obtained for all groups and analyzed.RESULTSFrom 1° to 10°, the relative mesiodistal width ratios for the maxillary anterior teeth showed no significant differences from those at 0°. In all three groups, the relative width ratio of the maxillary central incisor was smaller than that specified in the Golden Proportion; the opposite was true for the canine.CONCLUSIONOur results suggest that the mesiodistal width ratios of the maxillary anterior teeth do not follow the Golden Proportion in Korean adults, and that a change in the horizontal plane angle from 1° to 10° during frontal photography does not affect these ratios.

Balloon vertebroplasty reinforced by injectable calcium sulfate cement versus posterolateral fusion for treatment of thoracolumbar burst fractures

Objective To compare the clinical curative effects of balloon vertebroplasty reinforced by injectable calcium sulfate cement (CSC) and posterolateral fusion after short-segment pedicle screw fixation through the fractured vertebra in treatment of thoracolumbar burst fractures. Methods From June 2011 to December 2013, 44 patients with single thoracolumbar burst fracture were admitted by our department. They were 30 men and 14 women, from 20 to 60 years of age (average, 42.5 years). Of them, 22 were treated by short-segment pedicle screw fixation through the fractured vertebra followed by transpedicular balloon reduction of the endplate and CSC injection (PKP group), the others underwent posterolateral fusion in addition to short-segment pedicle screw fixation through the fractured vertebra (fusion group) . The 2 groups were compared at preoperation, one week postoperation and the last follow-up in terms of visual analogue scale (VAS), Oswestry disability index (ODI), anterior height ratio of the injured vertebra, middle height ratio of the injured vertebra, the vertebral wedge angle and the sagittal cobb angle. Results The patients were followed up for an average of 24 months (range, from 18 to 46 months) . All the measure indexes at one week postoperation and the last follow-up were significantly improved than those at preoperation in all the patients (P 0.05). There was no significant between-group difference in the VAS score or ODI at either one week postoperation or the last follow-up (P > 0.05). At one week postoperation, the middle height ratio of the injured vertebra and the vertebral wedge angle in the PKP group were significantly better than in the fusion group ( P < 0.05). At the last follow-up, the PKP group showed a significantly less loss than the fusion group regarding the corrections of anterior height ratio of the injured vertebra, middle height ratio of the injured vertebra, the vertebral wedge angle and the sagittal cobb angle (P < 0.05). Conclusions In treatment of thoracolumbar burst fractures, compared with posterolateral fusion, balloon vertebroplasty reinforced by injectable CSC can better restore the shape of injured vertebral body and stability of the anterior and middle columns in the early period, and can also reduce losses of corrections. Key words: Spinal fractures; Fracture fixation, internal; Calcium sulfate; Cement

Association between Bolton discrepancy and Angle malocclusions.

This study aimed to assess and compare the overall and anterior ratios of tooth size discrepancies in all Angle malocclusion groups. The following null hypothesis (H0) was tested: no difference between tooth size discrepancies (overall and anterior) would be observed among Angle malocclusion groups. The sample comprised of 711 pre-orthodontic treatment study casts of Brazilian patients with a mean age of 17.42 years selected from private practices in Brazil. The casts were divided into 3 groups according to the type of malocclusion: Class I (n = 321), Class II (n = 324), and Class III patients (n = 66). The measurement of the greatest mesiodistal width of the teeth was performed using a centesimal precision digital caliper 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 evaluated using Bolton's method. The following statistical tests were applied: chi-square, independent t-test, and one-way ANOVA. Results showed that all Angle malocclusions groups exhibited a ratio compatible with those recommended by Bolton. With respect to the overall and anterior ratios among the malocclusion groups, no statistically significant differences were found. The null hypothesis was accepted because the results showed no differences in the overall and anterior ratios of tooth size discrepancies among different Angle malocclusion groups.

Characteristics of Pre-Descemet Membrane Corneal Dystrophy by Three Different Imaging Modalities—In Vivo Confocal Microscopy, Anterior Segment Optical Coherence Tomography, and Scheimpflug Corneal Densitometry Analysis

To evaluate the characteristics of pre-Descemet membrane corneal dystrophy by 3 different imaging modalities: in vivo confocal microscopy (IVCM), anterior segment optical coherence tomography (ASOCT), and Scheimpflug corneal densitometry analysis. A 32-year-old male patient with pre-Descemet membrane corneal dystrophy was subjected to imaging by IVCM, ASOCT, and Scheimpflug tomography. Slit-lamp biomicroscopy showed the presence of tiny pleomorphic opacities in the posterior stroma, immediately anterior to Descemet membrane bilaterally. On IVCM, pleomorphic, hyperreflective punctate particles were seen both intracellularly and extracellularly in the anterior and mid stroma with increased reflectivity of some keratocytes that, however, were of normal size. These changes increased in severity from the anterior to mid stroma. The posterior stroma had grossly enlarged hyperreflective keratocytes with prominent processes. The hyperreflective particles were also seen scattered on the endothelium. ASOCT revealed a well-delineated homogenous band of increased reflectivity of approximately 70 μm width in the posterior stroma of both eyes with a normal-appearing anterior and mid stroma. Corneal densitometry measured by Scheimpflug optical analysis revealed a higher amount of backscattered light from the posterior stroma with a posterior to anterior ratio of 0.8. In pre-Descemet membrane corneal dystrophy, although the structural changes seem to be limited to the posterior stroma as seen clinically and on ASOCT, IVCM demonstrates that the pathology is more extensive involving the entire corneal stroma and endothelium.

Minimally invasive transforaminal posterolateral approach for lumbar fractures of AO type A3 compli-cated with neurological deficits

Objective To investigate the clinical efficacy of minimally invasive transforaminal pos-terolateral approach (MI-TPLA) for lumbar fractures of AO type A3 complicated with neurological deficits. Methods From January 2010 to January 2013, 17 patients with lumbar fracture of AO type A3 complicated with neurological deficits were treated with neural tissue decompression through MI-TPLA, bone grafting within the injured vertebra and percutaneous pedicle screw fixation. They were 11 males and 6 females, 21 to 63 years of age (average, 45.7 years). Fracture occurred at L1 in 7 cases, at L2 in 6, at L3 in 3, and at L4 in one. According to Frankel grading system, the neurological status was evaluated as grade A in one case, as grade B in 2 cases, as grade C in 9, and as grade D in 5. Intraoperative blood loss, operation time and complications were recorded. Lumbar cobb angle and anterior height of injured vertebra were observed on lateral X-ray films. The ratio of canal median sagittal diameter occupied and the ratio of cross-section area occupied were measured and calculated at the maximally stenosed level on axial CT. Results All oper-ations were successfully completed. The operation time was 156.7 min (from 120 to 200 min), and the intra-operative blood loss was 280.9 mL (from 100 to 450 mL). All the patients were followed up for 24 months. The cobb angle reduced significantly from preoperative 26.8°±3.6° to postoperative 2.6°±1.7° (P<0.05). The anterior height ratio of injured vertebra restored significantly from preoperative 56.3% ±14.6% to postoper-ative 93.7% ±6.0% (P<0.05). The ratio of canal median sagittal diameter occupied and the ratio of cross-section area occupied significantly improved from preoperative 52.8% ±4.4% and 52.3% ±7.6% to postoperative 96.3% ±2.3% and 82.9% ±12.1% , respectively (P<0.05). At the final follow-up, im-provement in Frankel grade was observed in all the patients, with grade B in one case, grade C in one, grade D in 7 cases and grade E in 8. Conclusion MI-TPLA is less invasive, safe and effective for lumbar fractures of AO type A3 complicated with neurological deficits. Key words: Lumber vertebrae; Fractures, bone; Surgical procedures, minimally invasive; Neurological deficits

Bolton tooth size ratio among Sudanese Population sample: A preliminary study.

Background:The study of the mesiodistal size, the morphology of teeth and dental arch may play an important role in clinical dentistry, as well as other sciences such as Forensic Dentistry and Anthropology.Aims:The aims of the present study were to establish tooth-size ratio in Sudanese sample with Class I normal occlusion, to compare the tooth-size ratio between the present study and Bolton's study and between genders.Materials and Methods:The sample consisted of dental casts of 60 subjects (30 males and 30 females). Bolton formula was used to compute the overall and anterior ratio. The correlation coefficient between the anterior ratio and overall ratio was tested, and Student's t-test was used to compare tooth-size ratios between males and females, and between the present study and Bolton's result.Results:The results of the overall and anterior ratio was relatively similar to the mean values reported by Bolton, and there were no statistically significant differences between the mean values of the anterior ratio and the overall ratio between males and females. The correlation coefficient was (r = 0.79).Conclusions:The result obtained was similar to the Caucasian race. However, the reality indicates that the Sudanese population consisted of different racial groups; therefore, the firm conclusion is difficult to draw. Since this sample is not representative for the Sudanese population, hence, a further study with a large sample collected from the different parts of the Sudan is required.

Comparison of tooth size discrepancy in Angle′s class I and class II malocclusion in Rajasthani population

Aim: The purpose of this study was to compare the tooth size discrepancy according to Bolton ratios and norms between class I and class II malocclusion groups in Rajasthani population. Materials and Methods: A quantitative study was carried out at all dental colleges of Rajasthani. Cross-sectional data were gathered from the study casts of patients undergoing orthodontic treatment at all dental colleges of Rajasthan. 105 out of 150 study casts were filtered based upon the inclusion and exclusion criteria. The mesiodistal widths of all maxillary and mandibular teeth from right first molar to left first molar were calibrated with the use of a manual caliper. The readings were then used to compute the anterior and total Bolton ratios. Results: Significantly higher mean anterior tooth ratios were found for class II ( P Conclusion: Class II patients showed a tendency toward higher mesiodistal widths of teeth in the mandibular anterior region

Seventh key of occlusion: Diagnostic significance in different angle′s class I, II and III malocclusions

Introduction: As significant tooth size discrepancies prevent an ideal occlusion being produced at the end of orthodontic treatment, absence of a tooth size discrepancy is the seventh key for an ideal occlusion. Present study aimed to assess diagnostic reliability of Bolton's ratio for different Angle's malocclusion. Materials and Methods: The study models of 144 patients were divided in three groups based on malocclusion.The mesiodistal tooth width from permanent first molar to first molar were measured on the orthodontic study models. The readings were obtained using a digital vernier caliper to the nearest 0.01mm, with the blades of the caliper held perpendicular to the long axis of the tooth. Results: ANOVA showed no significant difference between all groups except between anterior ratio of Class II group. The mean ratio for the Class III sample was significantly greater than Class I and Class II subjects ( P Class I > Class II with significant difference between the Class I and Class II groups. Conclusion: Subjects with Class III group had a significantly greater prevalence of tooth size discrepancies than Class I and Class II group. Statistically significant difference was seen in the anterior ratio between the males and females of Class II malocclusion and no significant difference between other groups.

An evaluation of tooth size discrepancies among different malocclusion groups in North Indians

Objective: A study was conducted to evaluate tooth size discrepancies among different malocclusion groups. Materials and Methods: This study consisted of 160 North Indian subjects, 50 normal occlusion group and 110 subjects with varying degree of malocclusion, that is, Angle's Class I (40), Class II Division 1 (40) and Class III (30) malocclusion, respectively. Tooth size measurements were performed on the study models by using a digital Caliper with a liquid crystal display digital output to the nearest 0.01 mm, and various inter-arch ratios were analyzed. Statistical Analysis: One-way analysis of variance was used to analyze the difference in groups followed by Tukey post hoc test. Chi-square test was performed to demonstrate the prevalence of tooth size discrepancies among three malocclusion groups. Results: Significant differences were found for inter-arch ratios between the groups. Conclusions: Anterior, overall, and posterior ratios were higher in Class III followed by Class I and Class II Division 1 malocclusion, respectively. Anterior and overall tooth size discrepancy was found to be 20% and 17.2%, respectively, in the malocclusion sample.

Effects of diagonal shoulder training in a closed kinematic chain for secondary impingement syndrome: a case study.

[Purpose] This study examined the effects of diagonal shoulder training on an individual with secondary impingement due to scapular dyskinesis. [Subject] A 54 year-old female with secondary impingement participated in this study. [Methods] The patient performed diagonal shoulder training in 4-point kneeling, 3 times per day for 20 minutes over a period of 6 weeks. Evaluations of shoulder pain, range of motion, upper trapezius/lower serratus anterior ratio, and impingement were performed before training and at 2, 4, and 6 weeks. [Results] The patient’s parameters improved gradually. All parameters returned to normal ranges at 4 weeks. [Conclusion] Diagonal shoulder training is effective for improving dysfunction in individuals with secondary impingement. In addition, this training should be applied for more than 4 weeks.

Bolton tooth size ratio and its relation with arch widths, arch length and arch perimeter: A cone beam computed tomography (CBCT) study

Objective. The prime aim of the study was to measure and compare the 3D CBCT Bolton tooth size ratio in relation to the upper and lower arch widths, arch length and arch perimeter. Materials and methods. The data source was CBCT high volumetric data from the archives. Tooth size, arch widths, arch length and arch perimeter were measured in maxilla and mandibular arches. The independent t-test and ANOVA were used for statistical analyses. Results. The female Bolton anterior ratio (BAR) (78.373) and Bolton overall ratio (BOR) (93.231) show a greater tooth size ratio in comparison to male BAR (77.162) and BOR (93.124), respectively. However, no significant difference was found in the sexual comparison of all the measurements. Tooth size ratio in arch width groups also showed no significant difference. Significant discrepancies in the arch length (p < 0.05) groups and overall ratio and in the arch perimeter groups (p < 0.05 and p < 0.01) and anterior ratio were revealed. Conclusions. Tooth size ratios during orthodontic treatment for different arch length and arch perimeter groups need to be evaluated carefully.

Comparison of tooth size discrepancies in patients who have had upper anterior supernumerary teeth and a control group

Context: There have been a number of studies of tooth size discrepancy (TSD) in various populations, but none has investigated TSD in patients who have had upper anterior supernumerary teeth. Aims: The aim of the following study is to investigate TSD in patients who have had upper anterior supernumerary teeth. Settings and Design: This is a cross-sectional, case-control analytical study of an orthodontic sample carried out at Aberdeen Dental Hospital, University of Aberdeen, UK. Subjects and Methods: Mesiodistal dimensions of the permanent teeth on 120 study models of orthodontic patients (40 with upper anterior supernumerary teeth and 80 controls) were measured to determine anterior and overall Bolton ratios as well as the tooth size corrections. Statistical Analysis Used: Chi-square test was used to compare the supernumerary group with the control with regards to the incidence of TSD. Results: The percentage of subjects with anterior and an overall TSD in the supernumerary group was similar to that in the control group, however the supernumerary group had a greater percentage of patients who had smaller anterior and overall ratios more than 2 standard deviations (SDs) of Bolton's mean than the control group and the opposite holds true for those who had higher ratios more than 2 SDs of Bolton's mean ( P P Conclusions: Patients who have had anterior supernumerary teeth have a relative tooth tissue excess in the maxillary arch compared with the control group and thus may require tooth tissue reduction of the maxillary teeth to achieve optimal orthodontic outcome.

Tooth size and arch parameter discrepancies among different malocclusions in young permanent dentition of 13-15-year-old school children of Nalgonda District-South Indian population

Purpose: The objective of this study was to evaluate the presence of tooth material and arch length discrepancies of children in Nalgonda district, Andhra Pradesh, South India, in an age range of 13-15 years. Materials and Methods: Children aged 13-15 years who fulfilled the inclusion and exclusion criteria were selected for a sample of 200 children. A digital caliper was used for measuring the tooth and arch widths. Results: Significant tooth size differences were found between males and females and among different malocclusion groups. In the Class I malocclusion group, the mandibular canines were significantly smaller in females than that in males (P The maxillary central and lateral incisors presented significant variability. No significant sex differences were shown for Bolton's overall ratio and anterior ratio. Treatment planning should always take into consideration the discrepancy of the tooth size ratios and should include compensating esthetic procedures such as composite bonding, prosthetic reconstruction or reproximation.

Comparison of Effects of Tooth Extraction and Air-rotor Stripping Therapy on Tooth-size Discrepancy in Class I Borderline Patients

ABSTRACT Aim The objectives of this study were to investigate the effects of tooth extraction and air-rotor stripping therapy on tooth-size discrepancy, and to compare the changes between two groups. Materials and methods The sample comprised the preand post-treatment dental models of 20 postadolescent class I borderline patients. First group was composed of dental models of 10 patients (mean age of 17.1 ± 2.5 years) treated with four first premolars extraction. Second group included dental models of 10 patients (mean age of 18.8 ± 2.7 years) treated with air-rotor stripping. Treatment effects on Bolton overall and anterior ratios/values were analyzed by paired sample t-test and independent sample t-test was used for intergroup comparisons. Results The change in Bolton overall ratio was found statistically significant for the extraction and insignificant for the air-rotor stripping group. A statistically significant decrease was observed in Bolton anterior ratio for the air-rotor stripping group. Neither four premolars extraction nor air-rotor stripping therapy created statistically significant changes in Bolton overall/anterior values. The changes in Bolton overall ratio/value did not show a statistically significant difference between the groups. Conclusion This study showed that tooth extraction or air-rotor stripping therapy did not have an unfavorable effect on toothsize discrepancy in class I borderline patients. How to cite this article Kaya D, Taner T, Germeç-Çakan D. Comparison of Effects of Tooth Extraction and Air-rotor Stripping Therapy on Tooth-size Discrepancy in Class I Borderline Patients. Int J Experiment Dent Sci 2014;3(1):8-13.

Interarch Tooth Size Relationship of Indian Population: Does Bolton's Analysis Apply?

ABSTRACT Background Orthodontists have several methods to detect inter arch-tooth size discrepancies in patients presenting for orthodontic treatment. Many methods such as Pont's analysis, Nance and Carey's analysis, Peck and Peck ratio, Bolton's analysis are commonly used methods. A thorough search of literature reveals a paucity of reliable data on the mesiodistal dimensions of the crowns of the permanent dentition of Indian population. Without information about the size of individual tooth and groups of teeth for Indian population, it is difficult for the clinician to make an adequate diagnosis and treatment plan and to carry out a plan of therapy. Aim To determine the size of individual permanent tooth and the sex differences, with tooth size ratios according to Bolton's formula and to evaluate the reliability of Bolton's norms (Anterior/Posterior) in Indian population. Materials and methods One hundred and twenty cases in which an excellent occlusion was naturally existent with the mean age of 22 years (18-27 years) were selected in the study. The casts were prepared after taking alginate impression of maxillary and mandibular arches and pouring them immediately with dental stone. A sliding Digital Vernier calliper used to measure the teeth. The ratios of the mean of mesiodistal dimensions of types of teeth were computed. Results The mean overall ratio for the Indian population is found to be 92.11 with a standard deviation of 2.12. The values ranged from 86.50-97.13 and the median is 92.16. The mean anterior ratio for the Indian population is found to be 78.14 with a standard deviation of 2.59. Conclusion Bolton's original data does not represent Indian population. In our study Greater size variability was found in maxillary teeth as compared with mandibular teeth except mandibular first molar. Our study indicated that populationspecific standards are necessary for clinical assessments. Significant differences were shown for the overall ratio and anterior ratio for both sexes as compared to Bolton's ratio. How to cite this article Subbarao VV, Regalla RR, Santi V, Anita G, Kattimani VS. Interarch Tooth Size Relationship of Indian Populations: Does Bolton's Analysis Apply? J Contemp Dent Pract 2014;15(1):103-107.

Bolton’s Ratios for Indian Population, Can We Follow The Ideal Standards Blindly?

Introduction: Various studies have been conducted which show that interarch tooth size relation differ with population. The aim of this study was to find out Bolton ratio in Indian population. Methods: Measurement were taken from 50 study models of randomly selected males and females with class I molar and canine relationship with ideal overjet and overbite, who had not undergone any orthodontic or cosmetic dental treatment previously. Needle point dividers were used to measure the greatest mesio-distal diameter of all teeth. From the obtained data, the Kolmogrov-Smirnov test, standard error of mean, standard deviation, coefficient of variation, coefficient of correlation were measured and used to assign statistical significance. Results: Increased anterior ratio (79.2284) & decreased overall ratio (90.9464) in selected Indian population were found in relation to Bolton’s ideal ratio. Conclusions: - Differences between original Bolton ratio and obtained ratio for Indians were significant, specific standards for Indians might be needed.

Evaluation of Tooth Size and Dental Arch Ratio in Bengali Population Sample

Introduction: In order to maintain the proper relationship between upper and lower arch, Bolton proposed anterior ratio and overall ratio.&#x0D; Objective: To evaluate and compare the tooth size and arch size discrepancies between normal cases and Class I crowded cases of the Bengali population. To determine Bolton’s overall ratio and anterior ratio in the normal sample , and to identify the possible variation in tooth-arch size ratio in subjects in Bengali population.&#x0D; Materials &amp; Method: A total of 60 maxillary and mandibular pretreatment dental study casts were taken and divided into control group and study group. The descriptive statistics in respect of Bolton’s anterior ratio and overall ratio were calculated. The t-test was done for the statistical difference between the two mean values.&#x0D; Result: Bolton’s ratios in Bengali population sample values were found to be similar to the original data of Caucasian population. Females showed a tendency of smaller teeth than the males.&#x0D; Conclusion: Bolton’s ratios could be consistent to use in the orthodontic diagnosis of Bengali population. It supports the concept that females showed smaller teeth than the males.&#x0D;