Presentation is loading. Please wait.

Presentation is loading. Please wait.

Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 45 Dental Cements Copyright 2003, Elsevier Science (USA). All rights reserved. No.

Similar presentations


Presentation on theme: "Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 45 Dental Cements Copyright 2003, Elsevier Science (USA). All rights reserved. No."— Presentation transcript:

1 Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 45 Dental Cements 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 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.

3 Copyright 2003, Elsevier Science (USA). All rights reserved. Classification of Cements Type I: Luting agents that include permanent and temporary cements. Type II: Restorative applications. Type III: Liner or base applications. Type I: Luting agents that include permanent and temporary cements. Type II: Restorative applications. Type III: Liner or base applications.

4 Copyright 2003, Elsevier Science (USA). All rights reserved. Luting Agent A material that acts as an adhesive to hold together the casting to the tooth structure. Luting agents are designed to be either permanent or temporary.

5 Copyright 2003, Elsevier Science (USA). All rights reserved. Permanent Cement For the long term cementation of cast restorations such as inlays, crowns, bridges, laminate veneers, and orthodontic fixed appliances.

6 Copyright 2003, Elsevier Science (USA). All rights reserved. Temporary Cement Temporary cements are used when the restoration will have to be removed. Most commonly, temporary cement is selected for the placement of provisional coverage.

7 Copyright 2003, Elsevier Science (USA). All rights reserved. Variables Affecting Cements Mixing time Make sure to follow the manufactures directions for the mixing time, working time, and delivery time. Humidity If the clinical area is warm or humid, premature exposure of the cement to these environments can create a loss of water from the liquid or an addition of moisture to the powder. Mixing time Make sure to follow the manufactures directions for the mixing time, working time, and delivery time. Humidity If the clinical area is warm or humid, premature exposure of the cement to these environments can create a loss of water from the liquid or an addition of moisture to the powder.

8 Copyright 2003, Elsevier Science (USA). All rights reserved. Variables Affecting Cements contd Powder to liquid ratio Incorporating too much or too little powder will alter the consistency. Temperature Some types of cements put off an exothermic reaction. Powder to liquid ratio Incorporating too much or too little powder will alter the consistency. Temperature Some types of cements put off an exothermic reaction.

9 Copyright 2003, Elsevier Science (USA). All rights reserved. Mixing Dental Cements Before mixing, read and carefully follow the manufacturer's directions for the brand being mixed. Determine the use and then measure the powder and liquid according to the manufacturer's instructions. Place the powder toward one end of the glass slab or paper pad and the liquid toward the opposite end (the space between allows room for mixing). Before mixing, read and carefully follow the manufacturer's directions for the brand being mixed. Determine the use and then measure the powder and liquid according to the manufacturer's instructions. Place the powder toward one end of the glass slab or paper pad and the liquid toward the opposite end (the space between allows room for mixing).

10 Copyright 2003, Elsevier Science (USA). All rights reserved. Mixing Dental Cements contd Divide the powder into increments. When increment sizes vary, the smaller increments are used first. Incorporate each powder increment into the liquid and then mix thoroughly. Divide the powder into increments. When increment sizes vary, the smaller increments are used first. Incorporate each powder increment into the liquid and then mix thoroughly.

11 Copyright 2003, Elsevier Science (USA). All rights reserved. Types of Cements Zinc-oxide eugenol Zinc phosphate Polycarboxylate Glass ionomer Composite resin Zinc-oxide eugenol Zinc phosphate Polycarboxylate Glass ionomer Composite resin

12 Copyright 2003, Elsevier Science (USA). All rights reserved. Zinc Oxide Eugenol Chemical Makeup Liquid: Eugenol, H 2 O, acetic acid, zinc acetate, and calcium chloride. Powder: Zinc oxide, magnesium oxide, and silica. Chemical Makeup Liquid: Eugenol, H 2 O, acetic acid, zinc acetate, and calcium chloride. Powder: Zinc oxide, magnesium oxide, and silica.

13 Copyright 2003, Elsevier Science (USA). All rights reserved. Types of Zinc-Oxide Eugenol Type I Lacks strength and long term durability and is used for temporary cementation of provisional coverage. Type II Has reinforcing agents added and is used for the permanent cementation of cast restorations or appliances. Type I Lacks strength and long term durability and is used for temporary cementation of provisional coverage. Type II Has reinforcing agents added and is used for the permanent cementation of cast restorations or appliances.

14 Copyright 2003, Elsevier Science (USA). All rights reserved. Supply of Zinc-Oxide Eugenol Liquid/Powder Mixed on an oil resistant paper pad. Mixing time ranges from 30 to 60 seconds. Setting time in the mouth ranges from 3 to 5 minutes. Paste Supplied as a two paste system as temporary cement. Pastes are dispensed in equal lengths on a paper pad and mixed. Liquid/Powder Mixed on an oil resistant paper pad. Mixing time ranges from 30 to 60 seconds. Setting time in the mouth ranges from 3 to 5 minutes. Paste Supplied as a two paste system as temporary cement. Pastes are dispensed in equal lengths on a paper pad and mixed.

15 Copyright 2003, Elsevier Science (USA). All rights reserved. Zinc Phosphate Chemical Makeup Liquid: Phosphoric acid, aluminum phosphate, and water. Powder: Zinc oxide, magnesium oxide, and silica. Chemical Makeup Liquid: Phosphoric acid, aluminum phosphate, and water. Powder: Zinc oxide, magnesium oxide, and silica.

16 Copyright 2003, Elsevier Science (USA). All rights reserved. Types of Zinc Phosphate Type I (fine grain) Used for the permanent cementation of cast restorations such as crowns, inlays, onlays, and bridges. This material creates the very thin film layer that is necessary for accurate seating of castings. Type II (medium grain) Recommended for use as an insulating base for deep cavity preparations. Type I (fine grain) Used for the permanent cementation of cast restorations such as crowns, inlays, onlays, and bridges. This material creates the very thin film layer that is necessary for accurate seating of castings. Type II (medium grain) Recommended for use as an insulating base for deep cavity preparations.

17 Copyright 2003, Elsevier Science (USA). All rights reserved. Supply of Zinc Phosphate Powder/liquid Powder is divided into increments that vary in size. It is critical that the powder be added to the liquid in very small increments. Cement must be spatulated slowly over a wide area of a cool, dry, thick glass slab to dissipate the heat. Powder/liquid Powder is divided into increments that vary in size. It is critical that the powder be added to the liquid in very small increments. Cement must be spatulated slowly over a wide area of a cool, dry, thick glass slab to dissipate the heat.

18 Copyright 2003, Elsevier Science (USA). All rights reserved. Polycarboxylate Cements Chemical Makeup Liquid: Polyacrylic acid, itaconic acid, maleic acid, tartaric acid, and water Powder: Zinc oxide Chemical Makeup Liquid: Polyacrylic acid, itaconic acid, maleic acid, tartaric acid, and water Powder: Zinc oxide

19 Copyright 2003, Elsevier Science (USA). All rights reserved. Use of Polycarboxylate Used as a permanent cement for cast restorations, stainless steel crowns, and orthodontic bands. Used as a nonirritating base under both composite or amalgam restorations. Used as an intermediate restoration. Used as a permanent cement for cast restorations, stainless steel crowns, and orthodontic bands. Used as a nonirritating base under both composite or amalgam restorations. Used as an intermediate restoration.

20 Copyright 2003, Elsevier Science (USA). All rights reserved. Supply of Polycarboxylate Powder/liquid Liquid may be measured by using either the plastic squeeze bottle or the calibrated syringe type liquid dispenser. Liquid has a limited shelf life because it thickens as its water evaporates. Mixed on a nonabsorbent paper pad. Powder/liquid Liquid may be measured by using either the plastic squeeze bottle or the calibrated syringe type liquid dispenser. Liquid has a limited shelf life because it thickens as its water evaporates. Mixed on a nonabsorbent paper pad.

21 Copyright 2003, Elsevier Science (USA). All rights reserved. Glass Ionomer Chemical Makeup Liquid: Itaconic acid, tartaric acid, maleic acid, and water. Powder: Zinc oxide, aluminum oxide, and calcium. Chemical Makeup Liquid: Itaconic acid, tartaric acid, maleic acid, and water. Powder: Zinc oxide, aluminum oxide, and calcium.

22 Copyright 2003, Elsevier Science (USA). All rights reserved. Types of Glass Ionomer Type I For the cementation of metal restorations and direct bonded orthodontic brackets. Type II Designed for restoring areas of erosion near the gingiva. Type III Used as liners and dentin bonding agents. Type I For the cementation of metal restorations and direct bonded orthodontic brackets. Type II Designed for restoring areas of erosion near the gingiva. Type III Used as liners and dentin bonding agents.

23 Copyright 2003, Elsevier Science (USA). All rights reserved. Benefits of Glass Ionomer Powder is an acid soluble calcium. The slow release of fluoride from this powder aids in inhibiting recurrent decay. Causes less trauma or shock to the pulp than many other types of cements. Low solubility in the mouth. Adheres to a slightly moist tooth surface. Has a very thin film thickness, which is excellent for seating ease. Powder is an acid soluble calcium. The slow release of fluoride from this powder aids in inhibiting recurrent decay. Causes less trauma or shock to the pulp than many other types of cements. Low solubility in the mouth. Adheres to a slightly moist tooth surface. Has a very thin film thickness, which is excellent for seating ease.

24 Copyright 2003, Elsevier Science (USA). All rights reserved. Supply of Glass Ionomer Powder/liquid Mixed manually on a paper pad or a cool, dry glass slab. Glass slab increases the working time of the cement. Premeasured capsules Triturated and expressed through a dispenser. Powder/liquid Mixed manually on a paper pad or a cool, dry glass slab. Glass slab increases the working time of the cement. Premeasured capsules Triturated and expressed through a dispenser.

25 Copyright 2003, Elsevier Science (USA). All rights reserved. Composite Resin Chemical Makeup Physical properties are comparable to those of composite resins. Low film thickness. Insoluble in the mouth. Chemical Makeup Physical properties are comparable to those of composite resins. Low film thickness. Insoluble in the mouth.

26 Copyright 2003, Elsevier Science (USA). All rights reserved. Uses of Composite Resin Cementation of ceramic or resin inlays and onlays. Cementation of ceramic veneers. Cementation of orthodontic bands. Direct bonding of orthodontic brackets. Cementation of all metal castings. Cementation of ceramic or resin inlays and onlays. Cementation of ceramic veneers. Cementation of orthodontic bands. Direct bonding of orthodontic brackets. Cementation of all metal castings.

27 Copyright 2003, Elsevier Science (USA). All rights reserved. Supply of Composite Resin Powder and liquid mix Syringe-type applicator Base and catalyst Light cure/dual cure system Recommended portions of either application are dispensed onto a paper pad and mixed rapidly with a spatula. Powder and liquid mix Syringe-type applicator Base and catalyst Light cure/dual cure system Recommended portions of either application are dispensed onto a paper pad and mixed rapidly with a spatula.

28 Copyright 2003, Elsevier Science (USA). All rights reserved. Cement Removal Operator preparedness and knowledge Instruments selected for the procedure: Explorer, mouth mirror, black spoon. Use of a fulcrum. Use of dental floss in and around the embrasure areas. Operator preparedness and knowledge Instruments selected for the procedure: Explorer, mouth mirror, black spoon. Use of a fulcrum. Use of dental floss in and around the embrasure areas.


Download ppt "Copyright 2003, Elsevier Science (USA). All rights reserved. Chapter 45 Dental Cements Copyright 2003, Elsevier Science (USA). All rights reserved. No."

Similar presentations


Ads by Google