Department of Orthodontics by 6wFmxv

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									            RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES
                      BANGALORE, KARNATAKA




PROFORMA FOR REGISTRATION OF SUBJECTS FOR DISSERTATION




1.   NAME OF THE CANDIDATE DR. PRACHI S PHADNIS
     AND ADDRESS (in block
     letters)              DEPARTMENT OF ORTHODONTICS &
                           DENTOFACIAL ORTHOPAEDICS,
                           DR.   SYAMALA    REDDY   DENTAL
                           COLLEGE , HOSPITAL & RESEARCH
                           CENTRE,
                           MARATHAHALLI, BANGALORE- 560037
2.   NAME OF THE INSTITUTION   DR.  SYAMALA    REDDY   DENTAL
                               COLLEGE & HOSPITAL & RESEARCH
                               CENTRE,
                               MARATHAHALLI, BANGALORE- 560037
3.   COURSE OF STUDY AND MASTER OF DENTAL SURGERY IN
     SUBJECT              ORTHODONTICS AND DENTOFACIAL
                          ORTHOPAEDICS
4.   DATE OF ADMISSION TO 11TH APRIL 2008
     THE COURSE

5.   TITLE OF THE TOPIC          CORRELATION OF MAXILLARY
                                 CANINE ERUPTION AND SKELETAL
                                 MATURITY     IN    DIFFERENT
                                 VERTICAL            SKELETAL
                                 RELATIONSHIPS IN THE INDIAN
                                 POPULATION
6.   BRIEF RESUME OF INTENDED WORK:



     6.1 Need for the study:

     The frequency of impaction of the maxillary canines ranges from 0.8% to 3.6%.
     Lack of eruption of these teeth often requires a combined surgical and orthodontic
     therapeutic approach, and it may be associated with unfavorable sequelae such as
     resorption of the roots of the adjacent lateral incisors. The literature indicates
     average ages of about 12 years for girls and 13 for boys for maxillary canine
     emergence. Individual variability of eruption is great, and, more importantly, there
     is a weak correlation between chronologic age and biologic processes related to
     tooth development and eruption. Therefore, it is difficult to define canine delayed
     eruption or impaction on the basis of the subject’s age or dentition stage. Biologic
     indicators of skeletal maturity are available as alternative methods to chronologic
     age for a more reliable assessment of dentoskeletal developmental events in
     growing subjects. It is reported that all canines and premolars are usually erupted
     by the end of the pubertal growth spurt as assessed with the hand-wrist method
     The timing of certain recommended procedures,such as extraction of a deciduous
     canine aimed at promoting the spontaneous eruption of a potentially impacting
     permanent canine, is decided on the basis of dental age. Our aim in this study is to
     assess the relationship between the eruption of the permanent maxillary canines
     and the stages of cervical vertebrae maturation (CVM) in different vertical skeletal
     relationships to give orthodontists an alternative method for the definition of the
     expected time of canine eruption in the late mixed dentition.
6.2 REVIEW OF LITERATURE


                    1
1.     The study        was done to assess the relationship between the stage of
maturation of the maxillary and mandibular canines and the lower premolars and
second molars and known skeletal indicators of the pubertal growth spurt were
investigated. Data were obtained from the records of 197 children (159 white and
38 black) taken from the files of an orthodontic practice and the Orthodontic
Department of the School of Dentistry, University of the Witwatersrand. The
findings of this study indicate that the completion of root formation of the
mandibular canine tooth prior to apical closure may be used clinically as a
maturity indicator of the pubertal growth spurt with a similar degree of confidence
as some of the other indicators described on the hand-wrist radiograph among
children of Caucasoid origin .




2.     In this study 2,hand wrist radiographs and dental panoramic radiographs of
200 boys and 215 girls were assessed to determine the relationship between the
developmental stages of the mandibular canine and skeletal maturity indicators of
the pubertal growth spurt. The relationship between calcification of the mandibular
canine and skeletal maturity indicators were quite high, ranging from 0.53 to
0.85.Dental calcification stages of the mandibular canine provide readily available
and easily recognized indications of the maturity status of a person.
3.     The purpose of this research3 , was to investigate whether there is a
difference in dental maturation between skeletal open bite and skeletal deep bite
subjects of the same chronological age.The material consisted of 40 lateral
headfilms and 40 panoramic radiographs of 20 male and 20 female white subjects,
with a mean chronological age of 9 years and 2 months (range:7 years 6 months to
10 years 11 months).These subjects were selected on the basis of lower anterior
face height as a percentage of total face height and on the amount of open or deep-
bite from a total sample of 400 subjects. It seemed that skeletal open bite subjects
presented a slight tendency to have an advanced dental maturation, expressed by
dental age, as compared with skeletal deep bite subjects.




4.    The study4 was done to assess the relationship between the         formation/
eruption of maxillary teeth and the skeletal pattern of the maxilla .The sample
consisted of 81 skeletal Class III Japanese children (35 boys and 46 girls) with a
mean age of 8.8 ± 0.6 years (range, 7.3 to 10.0 years). The major findings were as
follows:1. Formation of all maxillary and mandibular teeth did not differ
significantly between the 2 groups. 2. Eruption of the maxillary second molars was
significantly delayed in the maxillary retrusion group compared with the control
group; eruption of the other teeth did not differ between the groups. The results
showed that maxillary skeletal pattern and chronologic age were significant
independent (explanatory) variables for eruption, but only the latter is significant
for the formation of the maxillary second molars.These findings indicate that a
shortened palatal length tends to delay the eruption of the maxillary second molar,
but the skeletal pattern of the maxilla cannot predict the stage of maxillary tooth
formation in skeletal Class III patients.
.

5.     The aim of the study5 was to assess the relationship between the eruption of
the permanent maxillary canines and skeletal maturity in subjects with different
skeletal relationships in the sagittal and vertical planes. A sample of 152 subjects
(63 boys, 89 girls) with erupting permanent maxillary canines were analyzed.
The prevalence rate for hyperdivergent subjects showing eruption of the
permanent maxillary canine in the prepeak group (37.2%) was significantly higher
than in the reference orthodontic population (21%). The eruption of the permanent
maxillary canine can occur at any stage in skeletal maturation before the end the
pubertal growth spurt (CS1-CS4), with hyperdivergent subjects more frequently
having prepubertal canine eruption.




6.3 OBJECTIVE OF THE STUDY

1. To evaluate the physiologic eruption of the maxillary permanent canine in
relation to the skeletal maturity evaluated with the cervical vertebrae maturation
(CVM) method.



2. To analyze the .timing of canine eruption       in relation to different vertical
skeletal relationships.
7.   MATERIALS AND METHODS

     7.1 Source of Data:

     Patients visiting the Department of Orthodontics & Pedodontics at

     Dr Syamala Reddy Dental College, Hospital & Research Centre , Bangalore




     7.2 Method of collection of data(including sampling procedure, if any):

         A sample of 130 subjects visiting the Department of Orthodontics &
            Pedodontics       at Dr Syamala Reddy Dental College, Hospital          &
            Research Centre , Bangalore with at least 1 permanent maxillary canine
            during the final phase of intraoral eruption will be analyzed

         Lateral cephalograms will be        taken at the same time as the intraoral
            photographs, and panoramic radiographs for all subjects.

         Other inclusionary criteria will be Indian origin ,no previous orthodontic
            treatment, no multiple tooth agenesis, no craniofacial anomalies, no
            traumatic injuries or massive caries of the dentition, and no pathologic
            obstacles to the eruption pathway of the maxillary canines (eg, odontomas,
            cysts, supernumeraries).

         On each lateral cephalogram, the CVM stage will be assessed according to
            the method of Baccetti et al. Skeletal relationships in the vertical planes
            will be    evaluated with cephalometric analysis that will include the
            SN/mandibular plane (SN/MP) angle.

         Subjects will be       classified as hyperdivergent, normodivergent, and
            hypodivergent .
   

    The subjects will be divided into prepeak (before the pubertal growth spurt,
         cervical stage [CS1 and CS2), peak (during the pubertal growth spurt, CS3
         and CS4), and postpeak (after the pubertal growth spurt,CS5 and CS6)
         groups.

    Skeletal relationships in the         vertical planes will be evaluated, and
         relationships to timing of canine eruption will be tested statistically.

    The obtained results will be tabulated, analyzed and concluded.




7.3 Does the study require any investigation or intervention to be conducted
on patients or other Humans or Animals? If so, please describe briefly.

        Yes, lateral cephalograms and panoramic radiographs will be taken for all
          the subjects.



7.4 Has ethical clearance been obtained from your institution in case of 7.3?

                               yes
8.   List of references:

        1. Chertkow ;Tooth mineralization as an indicator of the pubertal growth
              spurt . Am J Orthod Dentofacial Orthop, 1980, Jan (79-91)



        2. Coutinho, Buschang and Miranda; Mandibular canine calcification

             stages and skeletal maturity. Am J Orthod Dentofacial Orthop, 1993, Sep

        (262-268).



       3.      Guilherme R. P. Janson, Décio Rodrigues Martins, Orivaldo

             Tavano and Eduardo A. Dainesi; Dental maturation in subjects

            with extreme vertical facial types. European Journal of Orthodontics

            1998;20 ; (73–78).



        4.     Naoto Suda, Shigetoshi Hiyama, and Takayuki Kuroda;Relationship

             between formation/eruption of maxillary teeth and skeletal pattern of

             maxilla .Am J Orthod Dentofacial Orthop 2002;121(46-52).



        5.    Tiziano Baccetti,a Lorenzo Franchi,a Simona De Lisa,b and Veronica

             Giuntinib(2008);Eruption of the maxillary canines in relation to skeletal

         maturity.Am J Orthod Dentofacial Orthop 2008;133(748-51)
9.    Signature of the candidate:




                                    DR. PRACHI S PHADNIS

10.   Remarks of guide:


11.   Name and designation of :

      (in block letters)

      11.1 Guide:                   DR.   PRASHANTH      KAMATH
                                    PROFESSOR      AND       HEAD
                                    DEPARTMENT                 OF
                                    ORTHODONTICS              AND
                                    DENTOFACIAL ORTHOPAEDICS

                                    Dr. SYAMALA REDDY DENTAL
                                    COLLEGE,    HOSPITAL      AND
                                    RESEARCH               CENTRE,
                                    BANGALORE



      11.2 Signature:


      11.3 Co- guide (if any):      DR. PAVITHRA U.S

                                    PROFESSOR

                                    DEPARTMENT                 OF
                                    ORTHODONTICS              AND
                                    DENTOFACIAL ORTHOPAEDICS
                                    Dr. SYAMALA REDDY DENTAL
                                    COLLEGE,    HOSPITAL      AND
                                    RESEARCH               CENTRE,
                                         BANGALORE




      11.4 Signature:




      11.5 Head of the Department:       DR   PRASHANTH       KAMATH
                                         PROFESSOR      AND     HEAD
                                         DEPARTMENT               OF
                                         ORTHODONTICS            AND
                                         DENTOFACIAL ORTHOPAEDICS
                                         Dr. SYAMALA REDDY DENTAL
                                         COLLEGE,    HOSPITAL    AND
                                         RESEARCH             CENTRE,
                                         BANGALORE

      11.6 Signature:


12.   12.1 Remarks of the Chairman and
      Principal

      12.2 Signature:

								
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