The aims of this study are to test the reliability of the Moyers mixed dentition analysis and by 7doJ10

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									RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES, BANGALORE
                     KARNATAKA




  M.D.S ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS




      SYNOPSIS FOR REGISTRATION OF DISSERTATION




                   MARATHA MANDAL’S

            NATHAJIRAO G. HALGEKAR INSTITUTE

          OF DENTAL SCIENCES & RESEARCH CENTRE

                 BAUXITE ROAD, BELGAUM




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        RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES, KARNATAKA, BANGALORE


                                           ANNEXURE-II

                PROFORMA FOR REGISTRATION OF SUBJECTS FOR DISSERTATION




1   Name          of     the DR. VIJAYASHREE.U.H

    candidate            and D/O.H.H.ULIVEPPA “MRUTHYUNJAY NILAY”

    address                  PLOT NO122 VIDHYA NAGAR ,NR.SAYHADRI NAGAR

                             BAUXITE ROAD , BELGAUM-590018



2   Name          of     the MARATHA MANDAL’S

    institution              NATHAJIRAO G. HALGEKAR INSTITUTE OF DENTAL SCIENCES &

                             RESEARCH CENTRE, BELGAUM-590010


                             MASTER OF DENTAL SURGERY
3   Course of the study
                             (ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS)
    and subject



4   Date of admission        31/05/2011
                             “RELIABILITY OF MOYERS AND TANAKA JOHNSTON MIXED DENTITION
                             ANALYSIS IN BELGAUM POPULATION”
5   Title of the topic




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6   Brief resume of intended work

    6.1. Need for the study:

                  Space analysis in mixed dentition is an important aspect of orthodontic diagnosis and

       treatment planning. Maintaining space allows many patients to obtain good occlusion and proper

       growth and facial development. Determining tooth size in mixed dentition requires accurately

       predicting the mesiodistal widths of unerupted permanent premolars and canines6.

                   The accuracy of Moyers proportionality tables and Tanaka and Johnston             equations are

       fairly good when applied to children from northern European descents from which data were originally

       obtained. Because racial difference in mesiodistal tooth width is said to exist it is logical to doubt their

       applicability in Belgaum population.

                   The aims of this study are to test the reliability of the Moyers mixed dentition analysis and

       Tanaka Johnston equations in Belgaum population, so as to aid in treatment planning for the

       orthodontists in this region.




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6.2. Review of literature

    Falou diagne , khady diop-ba , pape ibrahima ngom &khadim mbow(2003)1 conducted a cross-

    sectional study on senegalese population consisting of 50 senegalese students (25 men ,25 women ,

    mean age 23.7 years) selected from the deparment of dentistry , faculty of medicine & dentistry,

    university cheikh anta diop , dakar , Senegal. Data were obtained from dental cast measurements of

    mesiodistal diameter of all Mandibular & maxillary canines & premolars & Mandibular incisors were

    made by a single investigator with Vernier gauge calipers. The Conclusions given were: Statistically

    significant sexual dimorphism in tooth sizes exists in Senegalese population. The Tanaka Johnston

    prediction equations & Moyers charts (50%) do not accurately predict the mesiodistal diameters of

    unerupted canines & premolars in Senegalese children. The discrepancies observed could be the result

    of racial diversity in Senegalese group.

    C Flores-mir ,E Bernabe ,C Camus, MA Carhuayo, PW Major (2003)2conducted a cross-sectional

    study on prediction of mesiodistal canine and premolar tooth width in a sample of peruvian adolescents

    consisting of 248 dental casts which were measured using a sliding caliper with Vernier scale rounded

    to 0.1mm .Conclusions given were Tanaka Johnston regressions equations were not precise, except for

    the upper arch in male sample. For females, the Moyers 95th percentile in the upper arch and the 65th

    percentile in the lower arch predicted the sum precisely. For males, the Moyers 65th percentile for the

    lower arch predicted the sum precisely, but none of the Moyers percentiles provided precise prediction

    in the upper arch



    E.S J.Abu Alhaija & M.A.Qudeimat (2006)3 conducted a cross-sectional mixed dentition space

   analysis in jordanian population comparing moyers and tanaka johnston. Sample consisting of 130 male

   & 96 female Jordanian subjects (age range is 14-16 years) with complete permanent dentition were

   randomly selected.

    The mesiodistal width of the four permanent Mandibular incisors, maxillary & Mandibular canines,

   and premolar teeth were measured using a Vernier gauge caliper to the nearest 0.1mm.The actual teeth



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measurements were then compared with the predicted values derived from the Tanaka & Johnston

equations & Moyers probability tables .correlation and linear regression analyses were performed

between the predicted and actual tooth size for Jordanian children and standard regression equations

were developed. The conclusions given were, Tanaka and Johnston prediction method was not accurate

when applied to a Jordanian population & Moyers method for prediction can be used for Jordanian

children at different probability levels for male and female subjects.

Mario legovic , Andrea novosel , Tomislav skrinjaric , Asja legovic ,Barbara mady         and Natasa

ivancic(2006)4 conducted a study on comparison of methods for predicting the size of unerupted

permanent canines and premolars. The aim of this study was to examine the reliability of eight methods

for determining the mesio-distal crown diameters (MDD) of the permanent canines and premolars (C, P

1 , and P 2 ). The study models of 120 children (60 boys and 60 girls) aged from 14 to 18 years treated

in orthodontic clinics were measured using seipel’s method, with calipers accurate to 0.01mm. The

findings of the study were the prediction methods of Moyers (1973) , Droschl et al. (1977) , Tanaka and

Johnston (1974) , Berendonk (1965) , Nawrath (1968) , and Legovi ć and Hautz (1989) tended to over-

estimate the sums of the crown widths of C, P 1 , and P 2 in both arches

 Hosseinzadeh nik. Tahere, Shalchi Majid, Mohandes. Fateme, Kharazi fard, Mohammad

javad(2007)5 conducted a study on predicting the size of unerupted canines and premolars of the

maxillary and mandibular quadrants in an iranian population to examine the accuracy of Moyers

probability tables and the Tanaka and Johnston prediction equations in predicting the size of unerupted

canines and premolars of the maxillary and mandibular quadrants in an Iranian population and to derive

a standard formula for it. sample of 280 subjects, 50 (25 males and 25 females) were selected by

specific inclusion criteria.Conclusions given were Tanaka and Johnston overestimate the actual size for

Iranian teeth widths. Moyers method can be used at 65% probability level for male subjects and at the

75% and 85% level for upper arch and the 50% and 65% level for lower arch in female subjects.

Alok k Jaiswal, Keshab R Paudel, Situ L Shrestha and Sunita Jaiswal (2009)6 conducted a cross-

sectional study prediction of space available for unerupted permanent canine and premolars in a



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nepalese population consisting of 100 Nepalese males and 100 females aged between 17 and 23 years.

Subjects without any previous orthodontic treatment fully erupted permanent teeth and with no denial

anomalies were recruited. Dental study models were taken and measurements of the mesio-distal widths

of teeth were carried out using digital caliper. The measured values were compared with predicted

values derived from Moyers method and Tanaka and Johnston equations. They concluded that the

newly developed regression equations are more accurate for prediction of width of unerupted permanent

teeth in a Nepalese population.




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    6.3. Objectives of the study

       To test the reliability of Moyers and Tanaka Johnston mixed dentition analysis in Belgaum population.




7   Materials and Methods

    7.1. Source of data: school going children of Belgaum city.

       7.2. Method of collection of data: The sample for this study consists of 50 boys & 50 girls (14-16years)

       will be randomly selected from schools in Belgaum city.

       Inclusion criteria are :

       1. Patients should be native of Belgaum

       2. All permanent teeth present in each arch(with exception of third molars)

       3. Mild crowding or spacing is acceptable.

       Exclusion criteria are:

       1. Craniofacial anomalies or previous history of orthodontic treatment.

       2. Proximal caries, restoration or significant attrition.

       1. Taking of impressions:

       Dental impressions will be taken with irreversible hydrocolloid alginate impression material &will be

       poured immediately with dental stone.



       2. The measuring device:

       A vernier caliper will be used to measure the models .The mesiodistal dimensions of the teeth will be

       obtained by measuring the maximum distance between approximate surfaces of teeth.

       3. Teeth measured :

       The teeth measured were the Mandibular permanent central & lateral incisors, the maxillary &

       Mandibular canines, 1st & second premolars. The mesiodistal width of the tooth will be obtained by

       measuring the greatest distance between contact points on proximal surfaces.



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       4.Statistical analysis:

       Descriptive statistics, including mean, standard deviation & maximum values will be calculated.

       Paired‘t’ test will be performed to compare differences between right & left sides. Independent‘t’ test

       will be performed to compare the tooth sizes between genders.

    7.3. Does the study require any investigation

    or interventions to be conducted on patients

    or other humans or animals? If so, please                                     Yes

    describe briefly.

                                                           Impressions will be taken with alginate impression

                                                                                material

    7.4. Has ethical clearance been obtained                                      Yes

    from your institution in case of 7.3?

8   References:

    1. Diagne F, Diop-Ba K, Ngom PI, Mbow K. Mixed dentition analysis in Senegalese population:

       elaboration of prediction tables. Am J Orthod Dentofac Orthop 2003; 124:178-183.

    2. C Flores-mir, E Bernabe, C Camus, MA Carhuayo, PW Major. prediction of mesiodistal canine and

       premolar tooth width in a sample of peruvian adolescents.orthod craniofacial res 2003;6:173-176

    3. ESJ Alhaija, MA Qudeimat. Mixed dentition space analysis in a Jordanian population: comparison of

       two methods. Int J Pediatr Dent 2006; 16:104-110.


    4. Mario legovic , Andrea novosel , Tomislavs krinjaric , Asja legovic ,Barbara mady             and Natasa

       ivancic .comparison of methods for predicting the size of unerupted permanent canines and premolars.

       European journal of orthodontics 2006;28:485-490

    5. Hosseinzadeh nik. Tahere, shalchi. Majid, mohandes. Fateme, kharazi fard, mohammad javad

       .predicting the size of unerupted canines and premolars of the maxillary and mandibula quadrants in an

       Iranian population .J Clin Pediatr Dent 2007;32:43-48

    6. Jaiswal K Alok ,Keshab R Paudel ,Situ L Shrestha and jaiswal sunita .Prediction of space available


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for unerupted permanent canine and premolars in a Nepalese population.Journal of orthodontics

2009;36:253-259.




                                          9
9    Signature of candidate

10   Remarks of the guide

11   Name and designation of(in block letter)

     11.1. Guide                       DR. SANJAY .L.NADUWINMANI M.D.S

                                       PROFESSOR,

                                       DEPARTMENT OF ORTHODONTICS

                                       MARATHA MANDAL’S

                                       NATHAJIRAO G. HALGEKAR INSTITUTE

                                          OF DENTAL SCIENCES & RESEARCH

                                          CENTRE, BELGAUM-590010

     11.2. Signature

     11.3 Co-guide

     11.4. Signature

     11.5. Head of the department      DR.VIJAY NAIK M.D.S

                                       PROFESSOR AND HEAD,

                                       DEPARTMENT OF ORTHODONTICS

                                       MARATHA MANDAL’S

                                       NATHAJIRAO G. HALGEKAR INSTITUTE

                                       OF       DENTAL   SCIENCES   &   RESEARCH

                                       CENTRE, BELGAUM-590010

     11.6. Signature

12   12.1. Remarks of the Principal

     12.2. Signature




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          DEPARTMENT OF ORTHODONTICS AND DENTOFACIAL
                         ORTHOPAEDICS
 M AR A T HA M AN D A L ’ S N A T HAJ I R A O G. HA L GE K A R I N S TI TUT E                                 OF
           D E N T A L S C I E NC E & R ES E AR C H C EN TR E , B ELG A U M

   “RELIABILITY OF MOYERS AND TANAKA JOHNSTON MIXED DENTITION ANALYSIS IN
                            BELGAUM POPULATION”
                                       CONSENT FORM

 I, ____________________________________________ aged _________________ have been informed about
 my involvement in the study in the language that I can understand:
   1) I agree to give my personal details like name, age, sex, address, previous dental history and the details
      required for the study to the best of my knowledge.
   2) I will cooperate with the dentist for my intraoral and extraoral examination and intraoral impressions.
   3) I will follow the instruction given by the doctor during the study.
   4) I permit the operator to utilize the information given by me and results obtained from this study for
      presentation and publication.
   5) I will not claim any returns for my cooperation in the study, even if it is being sponsored by any agency.
      I am participating with my own will and wish.
   6) If any reason I am unable to participate in the study, for reasons unknown, I can withdraw from the study.
  I have read, gone through and understood the above information given by the doctor about the study.
  I have entered and signed this application.
Dentist Name          :                                     Patient’s name:

Address        :

Signature of Dentist :                                      Ph. No.         :




Date:
Place:                                                      Subject's Signature




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