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Endodontics

Amalgam

Introduction History Classification Generations Types Amalgamation Advantages &disadvantages Setting reactions Properties Manipulation Condensation & mulling Mercury toxicity Failures Bonded amalgam Amalgam waste management Recent advances Conclusion Blacks amalgam was mixture of 72.5% silver and 27.5% tin amalgamated with mercury.  This formula significantly improved dimensional stability of amalgam. In early 1900’s …

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AMALGAM MODIFIED

INTRODUCTION   “Amalgam” derived from Greek word “Emolient” which means paste.   Amalgam is an alloy of 2 or more metals in which one of the constituents is essentially Hg.   Dental amalgam is an alloy of Hg, Ag, Cu & Sn which may contain Zn, Pd & other elements …

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Alloys

Background: Take advantage of the superior mechanical properties of metals compared with ceramics (impact resistance) Create strong bond between bone and metallic implant Hip replacements could benefit Current procedure uses a cement to bond metal shaft to bone Problem: Cement degrades over time and metal shaft loosens Result:  More surgery …

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All Ceramics

Leucite reinforced porcelainfeldspathic composition glass filled with crystalline leucite 50.6%wt increased strength, optec HSPdoes not re quire a core when used to fabricate all-ceramic restorations, as is necessary with aluminous PJC’STo reduce mismatch between co-efficient of thermal expansion, potassium ions in leucite have been exchanged for rubidium or cesium ions …

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AGE CHANGES IN ORAL TISSUES

Ageing is defined as a process of morphological and physiological disintegration as distinguished from infant, childhood and adolescence which are typified by processes of integration and co-ordination…Carranza. A disintegration of the balanced control and organisation that charecterises the young adult.   Most frequent oral motor disturbance in older persons is …

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Advances in Obturation system

Resilon research ltd,LLC. Resilon (Trade name “Epiphany”- Manufactured By Pentron ) – This is the most promising material for replacement of Gutta Percha. The Epiphany obturation system has been shown to resist leakage significantly better than gutta percha based obturation. Resilon was introduced to bond with methacrylate sealers and produce …

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Adhesives

The opinions expressed in this presentation are those of the author and do not necessarily reflect the official position of the US Air Force or the Department of Defense (DOD). Devices or materials appearing in this presentation are used as examples of currently available products/technologies and do not imply an …

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Access opening

Definition: Endodontic coronal preparation which enables unobstructed acccess to canal orifices ,straight line access to apical foramen,complete control over  instrumentation and accomodating obturation technique.   [Picture]: access-cavity-preparation-12-638.jpg Bur  is placed  occlusal to cingulum perpendicular to palatal surface. Ledges are formed called triangle 1 and 2 of dentin. Triangle 2 removed …

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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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Access Cavity part 2

Failure to identify and excavate all caries and to remove unsupported, weak tooth structure or faulty restoration.   Failure to establish proper access to the pulp chamber.   Failure to identify the angle of the crown to the root and the angle of the tooth in the dental arch.   …

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Access Cavity

IMPORTANT  GUIDELINES FOR PROPER ACCESS  CAVITY PREPARATION Complete removal of caries Correct location of the preparation Complete removal of the roof of the pulp chamber Orifices should be made clearly visible and easily reachable Over drilling should be avoided Principles of endodontic cavity preparation Any discussion of cavity preparation must …

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