STENCILDENT

  EPIDEMIOLOGY OF ORAL CANCER  INTRODUCTION: One of the major threats to public health in the developed world-cancer 2nd most common cause of death According to world health report :9.6 million death in 2018 its estimated that new cases will rise by 50% in the next 20 years . Cancer is defined by 4 characteristic trait: Clonality Autonomy Anaplasia Metastasis  International classification of disease (ICD) WHO (9TH version) Oral cancer is classified under rubrics  Lip-140 Tongue-141 Gingiva-143 Floor of mouth-144 Other parts of mouth-145  CANCER REGISTRATION IN INDIA: National cancer registry program(NCRP)was commenced by Indian council of medical research  3 (PBCRPS )  Population based cancer registries : Bangalore  Chennai  Mumbai 3 Hospital based cancer registries : Chandigarh, Dibrugarh, Thiruvanthapuram  Commenced from January 1 in 1982  Currently there are 36 (PBCRS) and 236 (HBCR) under NCRP. ETIOLOGY AND RISK FACTOR : Tobacco and alcohol -2020 WHO fact sheet :1.3 billion tobacco

 PRINCIPLES OF TOOTH PREPARATION DEFINITION : Tooth preparation is defined as the process of removal of diseased and or healthy enamel ,dentin and cementum to shape a tooth to receive a restoration (GPT8). BIOLOGIC : 1)PREVENTION OF DAMAGE  Adjacent teeth Soft tissue Pulp  2)CONSERVATION OF TOOTH STRUCTURE  3)MARGIN INTEGRITY Placement  Geometry  Adaptation  MECHANICAL : 1)RETENTION FORM  Magnitude of dislodging forces Geometry of preparation Path of insertion Roughness of fitting surface of casting  Materials being cemented Type of luting agent  2)RESISTANCE FORM Magnitude of dislodging forces Geometry of preparation Type of luting agent  3)STRUCTURAL DURABILITY  Occlusal reduction Functional cusp bevel Axial reduction  AESTHETIC : 1)Partial veneer restoration 2)Metal ceramic restoration 3)All ceramic restoration  AIM OF THIS POST : Hello my dear stencildent viewers hope you glanced through the principles of tooth preparation this is just a introductory post the upcoming post will be