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Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 44 Dental Liners, Bases and Bonding Systems Copyright 2003, Elsevier Science (USA).

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Presentation on theme: "Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 44 Dental Liners, Bases and Bonding Systems Copyright 2003, Elsevier Science (USA)."— Presentation transcript:

1 Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 44 Dental Liners, Bases and Bonding Systems Copyright 2003, Elsevier Science (USA). All rights reserved. No part of this product may be reproduced or transmitted in any form or by any means, electronic or mechanical, including input into or storage in any information system, without permission in writing from the publisher. PowerPoint ® presentation slides may be displayed and may be reproduced in print form for instructional purposes only, provided a proper copyright notice appears on the last page of each print-out. Produced in the United States of America ISBN

2 Copyright 2003, Elsevier Science (USA). All rights reserved. Introduction Dental liner, bases, and bonding systems are in a classification of dental materials that provide additional protection for the health and well-being of a tooth being restored.

3 Copyright 2003, Elsevier Science (USA). All rights reserved.  The design of the cavity preparation gives strength within the tooth and helps determine how the tooth will hold the restoration in place. Prepared Tooth Structures

4 Copyright 2003, Elsevier Science (USA). All rights reserved. Types of stimulusExamples of stimulus PhysicalThermal, electrical MechanicalHandpiece, traumatic occlusion ChemicalAcid from dental materials BiologicBacteria from saliva Types of stimulusExamples of stimulus PhysicalThermal, electrical MechanicalHandpiece, traumatic occlusion ChemicalAcid from dental materials BiologicBacteria from saliva Pulpal Responses

5 Copyright 2003, Elsevier Science (USA). All rights reserved.  Dental liners provide a thin barrier that protects the pulpal tissue from irritation caused by physical, mechanical, chemical and biologic element. Dental Liners

6 Copyright 2003, Elsevier Science (USA). All rights reserved.  Indications for use Protects the pulp from chemical irritation by its sealing ability. Stimulates the production of reparative or secondary dentin. Compatible with all types of restorative materials.  Indications for use Protects the pulp from chemical irritation by its sealing ability. Stimulates the production of reparative or secondary dentin. Compatible with all types of restorative materials. Calcium Hydroxide

7 Copyright 2003, Elsevier Science (USA). All rights reserved.  Application process Placed only on dentin. Placed directly over the deepest portion of the preparation.  Application process Placed only on dentin. Placed directly over the deepest portion of the preparation. Calcium Hydroxide  cont’d

8 Copyright 2003, Elsevier Science (USA). All rights reserved. Fig Location for placement of calcium hydroxide.

9 Copyright 2003, Elsevier Science (USA). All rights reserved.  Indications for use* Seal the dentinal tubules. Reduce leakage around a restoration. Act as a barrier to protect the tooth from highly acidic cements such as zinc phosphate. * This material is contraindicated in its use under composite resins and glass ionomer restorations.  Indications for use* Seal the dentinal tubules. Reduce leakage around a restoration. Act as a barrier to protect the tooth from highly acidic cements such as zinc phosphate. * This material is contraindicated in its use under composite resins and glass ionomer restorations. Varnishes

10 Copyright 2003, Elsevier Science (USA). All rights reserved.  Application process Applied with either a small disposable applicator or a cotton pellet. Thin coating of the varnish on the walls, floor, and margin of the cavity preparation. Apply a second coat.  Application process Applied with either a small disposable applicator or a cotton pellet. Thin coating of the varnish on the walls, floor, and margin of the cavity preparation. Apply a second coat. Varnishes  cont’d

11 Copyright 2003, Elsevier Science (USA). All rights reserved. Fig Location for placement of cavity varnish.

12 Copyright 2003, Elsevier Science (USA). All rights reserved.  Indications for use Treat or prevent hypersensitivity. Used instead of a varnish. Seal the dentinal tubules. Ideal for use under all indirect restorations.  Indications for use Treat or prevent hypersensitivity. Used instead of a varnish. Seal the dentinal tubules. Ideal for use under all indirect restorations. Dentin Sealer

13 Copyright 2003, Elsevier Science (USA). All rights reserved.  Application Process Material used sparingly. Do not allow to contact soft tissues (HEMA and glutaraldehyde). Apply the dentin sealer with the cotton- tipped applicator. Apply over all areas of the exposed dentin.  Application Process Material used sparingly. Do not allow to contact soft tissues (HEMA and glutaraldehyde). Apply the dentin sealer with the cotton- tipped applicator. Apply over all areas of the exposed dentin. Dentin Sealer  cont’d

14 Copyright 2003, Elsevier Science (USA). All rights reserved.  Dental bases provide pulpal protection. Protective base: Protect the pulp before the restoration is placed. Insulating base: Protect the tooth from thermal shock. Sedative base: Soothe a pulp that has been damaged by decay or irritated by mechanical means.  Dental bases provide pulpal protection. Protective base: Protect the pulp before the restoration is placed. Insulating base: Protect the tooth from thermal shock. Sedative base: Soothe a pulp that has been damaged by decay or irritated by mechanical means. Dental Bases

15 Copyright 2003, Elsevier Science (USA). All rights reserved.  Zinc oxide eugenol  Zinc phosphate  Polycarboxylate  Glass ionomer  Zinc oxide eugenol  Zinc phosphate  Polycarboxylate  Glass ionomer Types of Base Materials

16 Copyright 2003, Elsevier Science (USA). All rights reserved. Fig Location for placement of a base.

17 Copyright 2003, Elsevier Science (USA). All rights reserved.  Dental bonding improves retention by creating a micromechanical retention between the tooth structure and the restoration. Dental Bonding

18 Copyright 2003, Elsevier Science (USA). All rights reserved.  Enamel bonding is placed directly onto the intact enamel surface.  Examples of Enamel Bonding Sealants Bonded orthodontic brackets Resin ‑ bonded bridges Bonded veneers  Enamel bonding is placed directly onto the intact enamel surface.  Examples of Enamel Bonding Sealants Bonded orthodontic brackets Resin ‑ bonded bridges Bonded veneers Enamel Bonding

19 Copyright 2003, Elsevier Science (USA). All rights reserved.  Dentin bonding is placed on prepared dentin in order to bond.  Smear layer Thin layer of debris “Nature's bandage”  Dentin bonding is placed on prepared dentin in order to bond.  Smear layer Thin layer of debris “Nature's bandage” Dentin Bonding

20 Copyright 2003, Elsevier Science (USA). All rights reserved.  Etching Systems remove the smear layer in preparation for bonding.  Supplied as: Liquid/Gel Maleic acid Phosphoric acid  Etching Systems remove the smear layer in preparation for bonding.  Supplied as: Liquid/Gel Maleic acid Phosphoric acid Etching Systems

21 Copyright 2003, Elsevier Science (USA). All rights reserved.  Etchant is applied to remove the smear layer.  Plaque or debris is removed before the bonding process.  Avoid overdrying etched teeth.  Too much primer is better than too little.  Bonding solution covers all surfaces.  Contamination with saliva requires the entire procedure to be redone.  Allow time for bonding material to mature before completing the restoration.  Etchant is applied to remove the smear layer.  Plaque or debris is removed before the bonding process.  Avoid overdrying etched teeth.  Too much primer is better than too little.  Bonding solution covers all surfaces.  Contamination with saliva requires the entire procedure to be redone.  Allow time for bonding material to mature before completing the restoration. Clinical Application of the Etchant and Bonding Systems

22 Copyright 2003, Elsevier Science (USA). All rights reserved. Table 44-2: Supplementary Dental Materials and their Application in Order of Use


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