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Endodontics

dentin

INTRODUCTION DENTINOGESNESIS TYPES OF DENTIN PROPERTIES OF DENTIN INERVATION OF  DENTIN AGE AND FUNCTIONAL CHANGES CLINICAL CONSIDERATIONS     –  DENTIN SENSITIVITY     –  BONDING OF DENTIN ZONES OF DENTINAL CARIES DEVELOPMENTAL Disturbances CONCLUSION   It begins at the cusp  tips after the odontoblasts have differentiated and begin collagen production As …

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Dentin Bonding Agents

Dentin Bonding Agents

CHEMICAL ADHESION            Primary atomic bonds may be of three different types: 1) Ionic, 2) Covalent, and 3) Metallic. Ionic Bonds These primary bonds are of simple chemical type, resulting from the mutual attraction of positive and negative charges. The classic example being sodium chloride (Na+Cl–). Because the sodium atom …

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Dentascans

dentascans

Dentascans Plain dental radiographs are still the standard for routine dental evaluation. Readily available and relatively inexpensive and have better spatial resolution than CT scan. But in complicated cases where there is variation in root canal morphology Dentascan could be a useful tool Radiographic examination is an essential part of …

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Dental Pulp

Following the differentiation of the IEE into ameloblasts, odontoblast differentiate from the peripheral cells of dental papilla. Well organized capillaries are found at beginning of dentinogenesis. Rim of the enamel organ(IEE & OEE) is the cervical loop. Root formation is carried out by the proliferation of cells at the cervical …

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DENTAL CERAMICS

The most serious obstacle during this  phase in the development of ceramic technology was the temperature at which the pottery could be fired. The conversion of clay from a mass of individual particles loosely held by a water binder to a coherent solid relies on the process called Sintering      …

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dental cements

Dental cements are a classification of dental materials that are continually used in dentistry. The American Dental Association and the International Standards Organization (ISO) have teamed up to classify dental cements according to their properties and their intended uses in dentistry.   Before mixing, read and carefully follow the manufacturer’s …

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dental cements 2nd yr

MANIPULATION:         –  A cool glass slab is used  in order to delay the setting  and allow more  powder to be incorporated before  the matrix formation occurs.         –  The liquid should  be dispensed just before mixing.         –  The powder is added in small increments.                     Recommended ratio is  1.4gm/ …

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DENTAL CASTING ALLOYS-

The wide varieties of complex dental alloy compositions consist of the following: Dental amalgams containing the major elements mercury, silver, tin, and copper. Noble metal alloys in which the major elements are some combination of gold, palladium, silver and important secondary elements including copper, platinum, tin, indium and gallium. Base …

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Dental caries

Aristotle, Hippocrates and Shakespeare have all written on dental caries in their writings. Some theories put forward are the Worm theory, Vital theory etc. L. S. Parmly (1819)-first contributed to current understanding of caries mechanism Emil Magitot experimented using Pasteur findings. He produced artificial carious lesions in extracted teeth.   …

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Dental amalgam15

Introduction History Advantages and disadvantages Classification composition Purpose of each ingredient Manufacturing of alloy Setting reaction Properties Gallium alloys Tarnish: surface discoloration on metal or even slight loss or alteration of  the surface finish or luster. Corrosion: actual detoriation of a metal by reaction with its environment Active corrosion: interface …

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Dental amalgam14

Introduction History Advantages and disadvantages Classification composition Purpose of each ingredient Manufacturing of alloy Setting reaction Properties Gallium alloys   Durable High compressive strength Insoluble in the  fluids of mouth Adaptability to walls of preparation Least time consuming to place Ability to corrode-à decreased  microleakage Ability to take polish

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DENTAL ADHESION

INTRODUCTION. MECHANISMS OF ADHESION. PRINCIPLES OF ADHESION. COMPOSITIONAL AND STRUCTURAL ASPECTS OF ENAMEL AND DENTIN. CHALLENGES IN DENTIN BONDING. THE SMEAR LAYER. INTERNAL AND EXTERNAL DENTIN WETNESS. CERTAIN ADHESIVE TERMINOLOGIES.   FUNDAMENTALS OF ENAMEL AND DENTIN ADHESION. HISTORICAL PERSPECTIVE. SMEAR LAYER TREATMENT. ACID ETCHING OF ENAMEL. ETCHING &/OR CONDITIONING OF …

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denta scans

Access cavity revealed five canals. Dental CT determined the extend of periapical infection associated with the tooth along with loss of cortical plates , thereby helping in determining the treatment plan & prognosis of the tooth   Radiographic examination is an essential part of diagnosis in endodontic. Two dimensional imaging …

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Smear Layer

ensile strength of a cement-dentin interface,   Remove the smear layer by etching with acid.  Use  a resin that would infiltrate through the entire thickness of the smear layer.  To fix smear layer with glutaraldehyde (Hoppenbrouwers ,    Driessens & stadhouders, 1974) or tanning agents such as tannic acid or Ferric chloride …

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deep caries

Affected & Infected Dentin:    In operative procedures, it is convenient to       term dentin as either.. Affected dentin: is softened, demineralized dentin that is not yet invaded by bacteria à inner carious dentin ( does not requires removal ). OR Infected dentin: à outer carious dentin & Bacterial plaqueà is …

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deep caries managementboo

. Vital pulp therapy aims to treat reversible pulpal injury and maintain pulp vitality and function. It includes two therapeutic approaches: indirect pulp capping in cases of deep dentinal cavities and direct pulp capping/pulpotomy in cases of pulp exposures. Successful outcome for vital pulp therapy is very dependent on the …

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COOLed composites

Hybrid layer remained intact Thermal expansion of cooled inserts Curing rate & degree of cure ↓ when setting reaction occurs at lower temperature Pregel period could be longer Shrinkage vectors Thermal effect of curing light Under the condition of this study, Small prepolymerized composite inserts     have improved resin – …

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CONTACTS AND CONTOURS SEMINAR

Brauer JC, Richard RC 1964 illustrated the serious complication arising from improper location and degree of facial and lingual convexities. Mortan L. Perel 1971, studied the effect of  over contouring and under contouring on surrounding marginal gingiva. He concluded that, under contouring of various types did not produce any circumscribed …

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COMPOSITES IN DENTISTRY

Mid 1980s:Hybrid composites were developed.The first generation of Indirect lab processed microfil composite resin system was introduced. 1987:Second generation of Lab processed resin was developed. 1991:Mega filled composites with glass ceramic inserts coated with silane were introduced. 1992:Introduction of  fiber-reinforced composites which were composed of woven glass or polythene fibers. …

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Cleaning & Shaping using Rotary instuments

INTRODUCTION ROTARY SHAPING GUIDELINES CROWN DOWN TECHNIQUE CORONAL 2/3  ROTARY SHAPING TECHNIQUE APICAL 1/3 ROTARY SHAPING TECHNIQUE ROTARY SHAPING INSTRUMENTS CLEANING AND SHAPING WITH DIFFERENT ROTARY INSTRUMENTS CONCLUSION   Rotary Shaping instruments are replacing the conventional hand file systems to enhance  shaping ability of the canal , reduce clinical mishaps …

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clean n shape final

Endodontic treatment is divided into 3 main phases Bio mechanical preparation Disinfection Obturation The first step for effective BMP is straight line access Next step is exploration of the canal, extirpation of remaining pulp tissues and gross debridement of necrotic tissues Followed by proper instrumentation, irrigation and debridement and disinfection …

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CARIOLOGY1

INTRODUCTION DEFINITION CLASSIFICATION ETIOLOGY OF DENTAL CARIES—EARLY THEORIES                                                               CURRENT CONCEPTS CLINICAL FEATURES OF CARIES CARIES AS A SPECIFIC MICROBIAL INFECTION CONCEPT OF CRITICAL  pH NUTRITION,DIET AND DENTAL CARIES EFFECT OF DEMOGRAPHIC FACTORS ON DENTAL CARIES ROLE OF SALIVA ON DENTAL CARIES   TEETH ARE TOOLS that have evolved to …

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CARIES DIAGNOSIS

INTRODUCTION DEFINITION ASSESSMENT TOOLS CONVENTIONAL METHODS OF DIAGNOSIS RECENT METHODS OF CARIES DETECTION CARIES RISK ASSESSMENT MODERN CONCEPTS OF CARIES   MEASUREMENT POTENTIAL NEW DIAGNOSTIC MODALITIES CONCLUSION   Visual methods: Detection of white spot, discoloration / frank cavitations Without aids, unreliable Magnification loupes- Head worn prism loupes (X 4.5) or …

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Blunderbuss Canal

Apexification. Custom GP roll. Radicular rehabilitation using resin posts –  monobloc concept. Placement of barrier materials like MTA, Tricalcium phosphate in conjunction with customized post system or backfill technique (Obtura, Flowable resin).   Presence of periapical pathology – periapical abscess – destruction of Hertwigs epithelial root sheath. Repeated sinus tract …

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Advances in obturation system

Advances in obturation systems         System B technique         Therma fil technique         UltraFil 3D         Obtura  technique         Simplefil technique         Successfil technique  Resin based obturation techiniques          Resilon system          Endo rez technique          Fiber fil technique          EZ Fil Obturation system Method of use : Obturation is …

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access opening

B. Distal view of the same tooth demonstrating details not apparent in the radiograph: 1. presence of a lingual “shoulder” at the point where the chamber and canal join 2. broad labiolingual extent of the pulp 3. 29-degree lingual-axial angulation of the tooth The operator must recognize that a. the …

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Wound Healing

Infection Pigmentation Implantation Deficient scar Hypertropied scar & Keloid Excessive contraction Neoplasia Incisional hernia Dry Socket/Alveolitis Sicca Dolorosa/Alveolitis Osteitis/Acute Alveolar Osteomyelitis/Alveolagia Most common Focal osteomyelitis- disintegration of clot 95% in lower premolars & molars Within 1st few days… Extremely painful Palliative medicine & allow healing Tetracycline hydrochloride… Pack socket with …

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