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  • i

    RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES, BANGALORE,

    KARNATAKA.

    COMPARISON OF THE CLINICAL EVALUATION OF THE MARGINAL

    ACCURACY OF THE CAST RESTORATION WITH

    STEREOMICROSCOPY

    Dissertation submitted in partial fulfillment of the

    requirement for the degree of

    MASTER OF DENTAL SURGERY

    IN PROSTHODONTICS, CROWN & BRIDGE

    APRIL 2009 Dr. ABHISHEK RASTOGI

  • ii

    DEPARTMENT OF PROSTHODONTICS, CROWN & BRIDGE

    P.M. NADAGOUDA MEMORIAL DENTAL COLLEGE & HOSPITAL,

    BAGALKOT 587 101, KARNATAKA.

    COMPARISON OF THE CLINICAL EVALUATION OF THE MARGINAL

    ACCURACY OF THE CAST RESTORATION WITH

    STEREOMICROSCOPY

    By

    DR. ABHISHEK RASTOGI

    Dissertation Submitted to the

    Rajiv Gandhi University of Health Sciences, Bangalore, Karnataka

    In partial fulfillment of the requirements for the degree of

    MASTER OF DENTAL SURGERY

    In

    PROSTHODONTICS

    Under the Guidance of

    Dr. VIKAS KAMBLE

    DEPARTMENT Of PROSTHODONTICS, CROWN & BRIDGE P. M. N. M. DENTAL COLLEGE AND HOSPITAL

    Year: 2009

    RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES,

  • iii

    BANGALORE

    RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES,

    BANGALORE

    DECLARATION BY THE CANDIDATE

    I here by declare that this dissertation entitled Comparison of the clinical

    evaluation of the marginal accuracy of the cast restoration with

    stereomicroscopy is a bonafide and genuine research work carried out by me under

    the guidance of Dr Vikas Kamble M.D.S, Associate Professor, Department of

    Prosthodontics, P.M.N.M Dental College & Hospital, Bagalkot.

    Date: Signature of the Candidate

    Place: Bagalkot Dr. Abhishek Rastogi

  • iv

    CERTIFICATE BY THE GUIDE

    This is to certify that the dissertation entitled Comparison of the clinical evaluation

    of the marginal accuracy of the cast restoration with stereomicroscopy is a

    bonafide research work done by Dr. Abhishek Rastogi in partial fulfillment of the

    requirement for the degree of Master of Dental Surgery.

    Date: Dr. Vikas Kamble M.D.S, Place: Bagalkot Guide,

    Associate Professor,

    Department of Prosthodontics

    P.M.N.M Dental College & Hospital,

    Bagalkot 587101

  • v

    ENDORSEMENT BY THE HEAD OF THE DEPARTMENT,

    PRINCIPAL/ HEAD OF THE INSTITUTION

    This is to certify that the dissertation entitled Comparison of the clinical evaluation

    of the marginal accuracy of the cast restoration with stereomicroscopy is a bonafide

    research work done by Dr. Abhishek Rastogi under the guidance of Dr.Vikas

    Kamble M.D.S, Associate Professor, Department of Prosthodontics, P.M.N.M Dental

    College & Hospital, Bagalkot.

    Dr. VIKAS KAMBLE M.D.S Dr. SHRINIVAS S VANAKI M.D.S Associate Professor and Head, Principal,

    Department of Prosthodontics, P.M.N.M Dental College &

    P.M.N.M Dental College & Hospital, Hospital,Bagalkot-587101

    Bagalkot-587101 Date:

    Place: Bagalkot

  • vi

    COPY RIGHT

    Declaration by the Candidate

    I here by declare that Rajiv Gandhi University of Health Sciences, Karnataka

    shall have rights to preserve, use and disseminate this dissertation in print or

    electronic format for academic / research purpose.

    Date:

    Place: Bagalkot Dr. Abhishek Rastogi

    Rajiv Gandhi University of Health Sciences, Karnataka

  • vii

    Dedicated

    To

    My Beloved Parents

    Whose Countless Sacrifices Made My

    Dreams A

    Reality

    VVaakkrraattuunnddaa MMaahhaakkaayyaa SSuurryyaakkoottii SSaammaapprraabbhhaa,, NNiirrvviiggnnaamm KKuurruummeeddeevvaa SSaarrvvaakkaarryyeesshhuu SSaarrvvaaddaa

  • viii

    ACKNOWLEDGEMENT

    This thesis represents the assistance and efforts of many individuals, the

    contributions of whom I acknowledge and to whom I give my thanks.

    The individual most responsible for the completion of this study is my guide

    Dr.Vikas Kamble, Associate Professor and Head, Department of Prosthodontics,

    P.M.N.M Dental College, Bagalkot. His tireless pursuit for academic excellence and

    professional insight were a source of constant encouragement and inspiration. A

    mere word of thanks is not sufficient to express his unflinching support, keen

    surveillance, inestimable aid and continued inspiration during the preparation of

    this dissertation. He is a person who has a rare combination of being a dedicated

    professional and a caring human being. I will be indebted to him for his

    overwhelming help and kindness.

    It is with supreme sincerity and deep sense of appreciation that I thank my

    esteemed teacher Dr. Raviraj G.Desai Associate Professor, Department of

    Prosthodontics, P.M.N.M Dental college, Bagalkot. He has always given me

    excellent guidance, encouragement and friendly help during the course of my entire

    post graduation and under whose shade I comfortably grew up in department. His

    inspiration and encouragement have molded me to present.

    My heartfelt gratitude to Dr. (Mrs) Veena K. Subbarao former Professor,

    and Head, Department of Prosthodontics, P.M.N.M Dental college, Bagalkot, a

    teacher of inspiring genius and unstinting generosity for her overall guidance,

    encouragement, and suggestions during the course of this study.

    I would also like to thank Dr. Chandu G.S., former Associate Professor for

    his valuable suggestions and assistance throughout my postgraduate course.

    I would like to thank our staff members Dr. Kashinath Arabbi, Dr Reshma

    Kulkarni and Dr Nagraj for their support and kindly help.

  • ix

    I would like to express my thanks to our Principal Dr. Shrinivas S.

    Vanaki, for his support and providing me with adequate facilities for my study.

    Expressions are inadequate to convey my immense gratitude to Dr. S.S.

    Vanaki, Dr. R. S. Puranik and Dr. Shivakumar for allowing me to

    carry out stereomicroscopic evaluation as a part of my research work.

    I also thank our honorable chairman Shri. V. C. Charantimath for

    providing all the necessary facilities and an opportunity to carry out this study.

    My ever encouraging and helping colleagues Dr. D R V Kumar, Dr. Sumit

    Deshpande, Dr. Dayanand Huddar, Dr Piyush Tandon, Dr. Alok Sharma, Dr.

    Nishant Rajwadha, Dr Suresh Nagral, Dr Amandeep Bhullar, Dr Pavan Kulkarni,

    Dr Hitendra Yadav and Dr Suchitra S.R for their support, valuable criticism,

    suggestions and unfailing companionship.

    Among my friends Dr. Lakhmikant, Dr. Sudhakara and Dr Mangesh

    Shenoy requires special thanks for helping me out during my study.

    I owe sincere thanks to Mr. Abdul for his helping me to carry out my lab

    procedures during my study.

    I owe sincere thanks to Mr. S. B. Javali for his statistical help.

    I would like to thank our librarian for his immense support and providing me

    books and journals during my study.

    I convey my deepest gratitude to all other staff members, my post graduate

    colleagues for their help throughout this study.

    My special thanks to my parents and all my family members for their unseen

    sacrifices, constant advice, support and encouragement in every moment of my study.

    Their cheerful encouragement, timely support and cooperation made me to do my

    work better with my maximum enthusiasm.

    Lastly I wish to thank all those who have directly or indirectly contributed

    to the successful completion of this dissertation.

    Dr. Abhishek

  • x

    LIST OF ABBREVIATIONS USED

    o m Microns o SD Standard Deviation

  • xi

    ABSTRACT

    Background and Objectives:

    One of the most important criteria for the clinical success and longevity of cast

    restorations is its marginal adaptation. Marginal discrepancies adversely affect local

    periodontal tissue condition. There are several commonly used techniques to evaluate

    the accuracy of marginal fit of cast restoration prior to clinical acceptance. These

    include the use of dental explorer and Elastomeric disclosing materials.

    Studies have reported 30 microns to be a clinically acceptable gap

    discrepancy. However, there is limited information on sensitivity and specificity of

    commonly practiced clinical evaluations in detecting a marginal discrepancy of this

    magnitude. The indications for the use of die spacers in fabrication of cast restorations

    are well documented in the literature. In this in vitro study, die spacer was

    intentionally not used to create variations in casting fit for the purpose of the study.

    The aim of this study was to assess the effect of preparation design on

    marginal adaptation, as well as to assess sensitivity and specificity of clinical

    evaluation (i.e. explorer and elastomeric disclosing material) of cast restoration

    marginal adaptation when compared to stereomicroscopy.