Restorative and Esthetic DentistryPresentation Transcript
Restorative and Esthetic Dentistry Chapter 48 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 0-7216-9770-4
Restorative and esthetic dentistry is the treatment of the general dental needs of a patient.
Specific conditions that initiate a need for restorative dentistry are:
Initial or recurring decay.
Replacement of failed restorations.
Abrasion or the wearing away of tooth structure.
Erosion of tooth structure.
Specific conditions that initiate a need for esthetic treatment are:
Discoloration due to extrinsic or intrinsic staining.
Anomalies due to developmental disturbances.
Abnormal spacing between teeth.
Principles of Cavity Preparation
Initial cavity preparation
Develop the outline form and initial depth.
Establish primary resistance form .
Establish primary retention form .
Provide a convenience form .
Final cavity preparation
Remove any remaining enamel in the preparation, infected dentin, or old restorative material.
Apply additional resistance and retention locks, grooves, and coves to provide strength in the maintenance of the restoration.
Place dental materials that may include lining agents, bases, and desensitizing or bonding agents for pulpal protection and better retention.
Principles of Cavity Preparation cont’d
Table 48-1: Terminology in Understanding Cavity Preparation
Patient Preparation for Restorative Procedures
Inform the patient of the procedure to be performed and what to expect during the treatment.
Position the patient correctly for the dentist and the type of procedure.
Explain each step as the procedure progresses.
Responsibilities of the Chairside Assistant
Know the procedure and be able to anticipate the dentist's needs.
Prepare the setup for the procedures.
Provide moisture control and better visualization by means of high‑velocity suction and air‑water syringe.
Transfer dental instruments and accessories.
Mix and transfer dental materials.
Maintain patient comfort and appropriate exposure control precautions.
Components of a Restorative Procedure
Dentist evaluates the tooth to be restored.
Dentist obtains local anesthesia.
Assistant readies the type of moisture control to be used during the procedure.
Dentist prepares the tooth for the restoration.
Dentist determines the type of dental materials to be used.
Assistant mixes and transfers the dental materials.
Dentist burnishes, carves, or finishes the dental material.
Dentist checks the occlusion of the restoration.
Dentist finishes and polishes the restoration.
Class I Restorations
A class I lesion affects the pit and fissures of the teeth.
Surfaces involved are:
Occlusal surfaces of premolars and molars.
Occlusal two thirds of the facial surfaces of mandibular molars.
Occlusal third of the lingual surfaces of the maxillary molars.
Lingual surfaces of maxillary incisors, most frequently in the pit near the cingulum.
Fig. 48-5, A-D Class I restoration.
Class II Restorations
A class II lesion is an extension of the class I lesion into the proximal surfaces of premolars and molars.
Areas for class II decay involve:
Two-surface restoration of a posterior tooth.
Three-surface restoration of a posterior tooth.
Four- or more surface restoration of a posterior tooth.
Fig. 48-7, A-C Class II restorations.
Class III and IV Restorations
A class III lesion affects the interproximal surface of incisors and canines.
A class IV lesion involves a larger surface area, which includes the incisal edge and the interproximal surface of incisors and canines.
Fig. 48-8 Class III restoration.
Fig. 48-9 Class IV restoration.
Class V Restorations
A class V restoration is classified as a smooth surface restoration. These decayed lesions occur at:
The gingival third of the facial or lingual surfaces of any tooth.
The root of a tooth, near the cementoenamel junction.
Placed when decay has extended into the cusp of a tooth and undermined the enamel and dentin.
The general understanding when using retention pins is that one pin is placed for each missing cusp.
Restoration that is placed for a short term.
Factors for placing an intermediate restoration is:
The health of the tooth.
Waiting to receive a permanent restoration.
Direct Bonded Veneers
A veneer is a thin layer of tooth‑colored material applied to the facial surface of a prepared tooth.
A veneer is used to improve the appearance of teeth that are:
Discolored with intrinsic stains.
Darkened after endodontic treatment.
Commonly known as vital bleaching, tooth whitening is a noninvasive method of lightening dark or discolored teeth.
Indications for Using a Tooth Whitener
Indications for procedure:
Extrinsic stains from foods, cigarette smoking, coffee, or tea.
Intrinsic stains, such as mild tetracycline stains and mild fluorosis.
Either carbamide peroxide or hydrogen peroxide.
With one or a mixture of propylene glycol, glycerin, and water.
Material is placed in a thermoplastic custom tray that the patient wears for a designated period.
For the 10% to 16% carbamide peroxide gels, the wear schedule would be for 1 hour, twice a day for the first week and once a day for the second week.
For the 20% to 22% mixture, 1 hour a day for a 2-week period.
For the hydrogen peroxide 15 to 30 minutes, 2 or 3 times a day for a 2-week period.
Possible Complications to Tooth Whitening
Patient may experience sensitivity to heat and cold after removal of tray and material. The use of sensitive-type toothpaste is recommended.
Gingival tissue exposed to any excess gel may be caused by improper tray fit, allowing the material to ooze onto the gingiva. The patient is recommended to not overfill the tray with material and to remove any excess after seating the tray.
Dental Assistant's Role in Tooth-Whitening Procedure
Aid in the recording of the medical and dental history.
Assist in making the shade selection.
Take intraoral photographs before and after the procedure.
Take and pour up the preliminary impression for the custom tray.
Fabricate and trim the tray.
Provide postoperative instructions on the use of the material.
Assist in weekly or biweekly clinical visits.
Patient Instructions for Tooth-Whitening Procedure
Brush and floss before tray placement.
Place gel in tray in an equal limited amount.
Instruct the patient not to have any food or drink when wearing the tray.
Instruct the patient to wear the tray for the recommended time.
If the patient experiences any problems during this time, discontinue use and discuss with the dentist.
Thin, flexible strips coated with an adhesive hydrogen peroxide whitening gel.
The patient peels off the backing like a Band-Aid and presses the strip to the facial anterior teeth, making sure that the upper edge of the strip is at the gingival margin. The remaining portion of the strip is folded onto the lingual surface.