Definition: A Chemical reaction between a metal and its environment to form metal compound. A Chemical or Electrochemical process through which a metal is attacked by natural agents such as air and water resulting in partial or complete dissolution, deterioration or weakening of any solid substance. A common Example of corrosion is “Rusting of Iron” […]
Dental Caries GV Black Classification of Carious Lesions
Definition: Dental Caries is an irreversible microbial disease of the calcified tissues of the teeth, characterized by de-mineralization of the inorganic portion and destruction of the organic substance of the tooth. Dental Caries is the result of the formation of dental plaque which harbors bacteria which in turn ferment carbohydrates available in daily food producing […]
Tooth Avulsion – Exarticulation of Tooth
Definition: Displacement of tooth totally out of the socket. Some Facts about Avulsion: Ranges from 0.5 -16% of injuries in the permanent dentition 7-13% in the primary dentition Occurs most often in 7-9 yrs of age. Etiology: Fights Sports injuries Falls against hard objects Accidents Most Frequently Affected areas: Max. CI – Most affected. Lower […]
Obtaining the Resistance Form | Resistance Form
Primary Resistance Form Definition: Primary Resistance form is that shape and placement of the cavity walls to best enable both the tooth and restoration to withstand, without fracture the stresses of Masticatory forces delivered principally along the long axis of the tooth. Resistance form is the design of a cavity in such a way that […]
Steralization in Endodontics
Endodontics is an important branch of dentistry which deals with the Diagnosis, Prevention and Treatment of diseases concerned with the hard tissues(Enamel, dentin) and soft tissues(Pulp) of the tooth. So for every Dental Student and Dental Practitioner it is important and necessary to learn the sterilization techniques followed in Endodontics which will directly or indirectly […]
Toilet of the cavity
TOILET OF THE CAVITY: This is the act of freeing the preparation walls and margins from objects that may interfere with proper adaptability and behavior of the restorative material. It comes under Coronal Cavity preparation principles which include other principles like – Outline form, Convenience form, Removal of any remaining caries and old restorative materials […]
Finishing of the Cavity walls
FINISHING OF THE CAVITY WALLS: It is the further development, when indicated, of a specific cavosurface design and degree of smoothness that produces the maximum effectiveness of the restorative material being used. OBJECTIVES: To create the best marginal seal possible between the restorative material and the tooth structure. Afford a smooth marginal junction. Provide maximum […]
PULP PROTECTION in Cavity Preparation
PULP PROTECTION: It is the process of protecting the pulp from external irritants (Thermal, chemical and physical) using materials sucha s Cavity Bases, Liners. This step is very important in teeth with deep dental caries which extend into the dentis close to the pulp. Following proper pulp protection prptocols we can prevent Pulpal infection and […]
Removal of Remaining Carious Dentin or Old Restoration
REMOVAL OF REMAINING CARIOUS DENTIN OR OLD RESTORATIONS: It is the elimination of any infected carious tooth structure or faulty restorations left in the tooth after initial cavity preparation. Caries left in the pulpal/ axial floor is excavated thoroughly making the cavity deeper. 0.75- 1 mm of dentin should cover the pulp. All the infected/ […]
Convenience Form in Cavity Preparation
CONVENIENCE FORM Definition: Convenience form is defined as that form of cavity preparation that allows adequate observation, accessibility and case of operation in preparing and restoring the cavity. Modification in tooth preparation for convenience form: Occlusal step in classII. Labial/lingual access for classIII/classIV. Occlusal divergence of cavity walls in cast restorations. INSTRUMENT MODIFICATION: Contra angling […]
Steps to obtain proper Retention form in Cavity Preparation
RETENTION FORM: Retention form is that form of cavity that best permits the restoration to resist displacement through tipping or lifting forces, especially masticatory loading. PRINCIPAL MEANS OF GAINING RETENTION: Inverted truncated cones or undercuts. Dovetail. Elastic deformation of dentin e.g. gold foil. Friction – which depends on surface area, opposing walls or surfaces involved, […]
Outline Form in cavity preparation
OUTLINE FORM: G .V. Black has described the outline form as being “the form of the area of the tooth surface to be included within the outline or enamel margins of the finished cavity”. It is the placement of cavity margins in the positions they will occupy in the final preparation, except for finishing enamel […]
Cavity Preparation in Dentistry
Definition of Cavity Preparation: The orderly operating procedure required to remove diseased tissue and establish in a tooth the biomechanically acceptable form necessary to receive and retain a restoration. (Boucher’s Clinical Dental Terminology): An operation in which carious material is removed from teeth and biomechanically correct forms are established in the teeth to receive and retain […]
Root Canal Treatment – Indications, Procedure and Cost
Root Canal Treatment: It is a procedure aimed at treating an Infected tooth where the infected pulp tissue is removed from the root canal, and the cleaned root canal system is filled up with a bio-compatible material known as Gutta purcha, then the prepared cavity is filled or restored with a suitable restorative material – […]