RAJIVGANDHIUNIVERSITY OF HEALTH SCIENCES BANGALORE, KARNATAKA ANNEXURE – II
PROFORMA FOR REGISTRATION OF SUBJECTS FOR DISSERTATION
1. / NAMEOF THE CANDIDATE & ADDRESS (IN BLOCK LETTERS) / DR. MOHAMMAD UROOJ AHMEDPOST GRADUATE STUDENT, DEPARTMENT OF ORTHODONTICS AND DENTOFACIAL ORHTOPAEDICS.
AL-BADAR RURAL DENTALCOLLEGE & HOSPITAL, GULBARGA
2 / NAME OF THE INSTITUTION / AL-BADAR RURAL DENTALCOLLEGE & HOSPITAL, GULBARGA
3. / COURSE OF STUDY AND SUBJECT / MASTER OF DENTAL SURGERY IN ORTHODONTICS AND DENTOFACIAL ORTHOPAEDICS.
4. / DATE OF ADMISSION TO THE COURSE / 21 st APRIL 2009
5. / TITLE OF THE TOPIC / “TO EVALUATE THE ACCURACY OF MOYERS MIXED DENTITION ANALYSIS IN KARNATAKAPOPULATION”.AN INVITRO STUDY
6. BRIEF RESUME OF THE INTENDED WORKS
6.1 Need for the study:-
Mixed dentition space analysis forms a critical aspect of early orthodontic treatment. An accurate mixed dentition space analysis is one of the important criteria in determining whether the treatment plan may involve serial extraction, guidance of eruption, space maintenance, space regaining or just periodic observation of the patients. Many studies have been done on Moyers mixed dentition space analysis for different population. It has been concluded that it has certain limitations such as-
a.Moyers mixed dentition space analysis is not statistically applicable for all the populations.
b.Moyers mixed dentition space analysis is the same irrespective of the sex, but studies have shown different values for both males and females.
The purpose of this study is to know the accuracy of Moyers mixed dentition analysis for Karnataka population.
6.2 Review of Literature
This study was performed to determine the applicability of the Moyers' probability tables for use on black subjects and to formulate new relevant tables if necessary. Data was collected from a series of 100 randomly selected study models of black patients. The sample was equally subdivided by gender and all subjects had Angle Class I molar relationships with only minor malocclusions such as minor crowding, rotations, or diastemas. All teeth including the first molars were measured. These data were then utilized in regression equations for both maxillary and mandibular arches, to enable the prediction of the mesiodistal widths of the canines and two premolars. The equations and predicted values were compared with those of the Moyers' probability tables, and
significant differences (p <0.05) were found (except for the prediction of maxillary canines and premolars in females at the 85 and 95 percentile probability level). New probability tables for black subjects were formulated.1
This study was conducted to test the reliability of Moyers mixed dentition space analysis in school children of Belgaum district.150 school children within the age group of 13 to 16 were selected. Mesiodistal dimensions of permanent mandibular incisors, maxillary and mandibular canines and premolars were measured using a digital caliper. The results revealed that Moyers prediction were not accurate when applied to the Belgaum school children. 2
This study produced simple linear regression equation to be used for mixed dentition space analysis for Thailand population. Measurements were made on the dental casts of 215 boys and 215 girls. It was found that males had significantly larger teeth than females as represented by the summation of mandibular incisors, canine, and premolars width. Measurements were made by using a Mituotoyo digimatic caliper 207 series. Results shows that Moyers probability tables are not suitable for predicting the summed widths of unerupted canine and premolars in Thai subjects. 3
This study was conducted to produce odontometric data, correlation coefficient between the combined mesiodistal width of permanent mandibular incisors and the canine and premolars for each quadrant and prediction tables with the regression equation, specifically for Senegalese children. Sixty (60) Senegalese were selected and mesiodistal measurements of permanent teeth were done with calipers. The results showed that the proposed value follows the Moyers chart at 50% confidence levels. That is, the Moyers charts do not accurately predict the mesiodistal diameter in Senegalese children. 4
They conducted the studies to determine the applicability of Moyers and Tanaka-Johnston Predictions for Indonesian Javanese children.248 Javanese children of which 143 males and 142 females of aged between 11 to 14 were selected. The mesiodistal crown diameter was measured with calipers with an accuracy of 0.05mm (Mitutoyo YS-33.yamaura Co., Japan).This study confirmed that the use of Moyer’s and Tanaka-Johnston prediction methods for mixed dentition analysis among Indonesian Javanese children was unsuitable.5
The purpose of this study was to find the correlation coefficients between the mesiodistal widths of permanent mandibular incisors and the permanent canine and premolars.90 patients of 12 -20 years old of which 45 females and 45 males were selected. Mesiodistal tooth widths were measures using a sliding caliper with a vernier scale (Dentaurum,pforzheim,Germany) with an accuracy of 0.1mm.Regression equations were compared with Moyer’s and Tanaka-Johnston probability charts. The results showed that the Moyer’s and Tanaka-Johnston method are not accurate when used in Iranian Population.6
Objectives of the study:
1)To test the reliability of Moyers mixed dentition space analysis in Karnataka population.
2)To determine the sexual dimorphism with respect to Moyers mixed dentition analysis.
3)To compare the ethnic differences between Karnataka population and Caucasians.
7. MATERIALS AND METHODS-
- Source of data-
Plaster models of 60 patients (30 male and 30 female) between 13-16
years of age selected randomly among Karnataka population.
- Method of collection of data- (including sampling procedure, if any)
The primary selection criteria
- Subjects should have ancestors belonging to Karnataka.
- All teeth must be present and fully erupted from 2nd molar to 2nd molar
- Absences of congenital anomalies in the tooth morphology should be present.
- Intact dentition with no proximal caries or restoration or age related attrition.
5. Subjects with no previous history of orthodontic treatment
METHOD OF STUDY-
Impression will be made of the selected subjects, orthodontic study models will be prepared and analyzed for Moyers mixed dentition space analysis using Digital Vernier Caliper measuring 0.01 mm.. The mesiodistal width of permanent mandibular incisors and maxillary and mandibular canine and premolars will be measured.
The values obtained will be statistically analyzed for descriptive statistics, including means, standard deviations and minimum and maximum values will be calculated.
7.3 Does the Study require any investigations or interventions to be conducted on patients or other human or animals? If so, please describe briefly.
Not Applicable
7.4 Has ethical clearance been obtained from your institution in case of 7.3?
Not Applicable
LIST OF REFERENCES:
1. Schirmer UR, WiltshireWA. Orthodontic probability tables for black patients of African descent: Mixed dentition analysis. Am J Orthod Dentofacial Orthop 1997;112:545-51
2. Durgekar SG, Naik V. Evaluation of Moyers mixed dentition analysis in school children. Indian J Dent Res 2009;20:26-30
3. Jaroontham J, Godfrey K. Mixed dentition space analysis in a Thai population. Eur J Orthod 2000; 22:127-34.
4. Diagne falou, Diop khady, Ngom ibrahima pape, Mbow khadim. Mixed dentition analysis in a Senegalese population: elaboration of prediction tables. Am J Orthod Dentofacial Orthop 2003:124:178-83.
5. Kuswandari S, Nishino M, Arita K and Abe Y. Mixed dentition space analysis for Indonesian Javanese children.Pediatric Dental Journal 16(1):74-83, 2006.
6. Meibodi S E,Meybodi A R F,Rahebi S,Eslamian L .The lower incisors as a predictor for the size of unerupted canine and premolars in the Iranian ethnicity. Orthodontic waves 68 (2009) 112-115.
9. / SIGNATURE OF THE CANDIDATE10. / REMARK OF THE GUIDE / THIS STUDY IS HELPFUL IN ANALYSING THE APPLICABILITY OF MOYERS`S MIXED DENTITION ANALYSIS FOR KARNATAKA POPULATION.
11.
12. / 11.1 NAME & DESIGNATION OF GUIDE
11.2 SIGNATURE
11.3 CO-GUIDE (IF ANY)
11.4 SIGNATURE
11.5 HEAD OF THE DEPARTMENT
11.6 SIGNATURE
REMARK OF CHAIRMAN AND PRINCIPAL
12.1` SIGNATURE / Dr. ANITA KARANDIKAR PROFESSOR & HEAD OF THE DEPARTMENT OF ORTHODONTICS & DENTOFACIAL ORTHOPAEDICS AL-BADAR RURAL DENTAL COLLEGE & HOSPITAL, GULBARGA
Dr. ANITA KARANDIKAR PROFESSOR & HEAD OF THE DEPARTMENT OF ORTHODONTICS & DENTOFACIAL ORTHOPAEDICS AL-BADAR RURAL DENTAL COLLEGE & HOSPITAL, GULBARGA
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