The procedure for the removal of the carious lesion is the same as that of a class i. Amalgam matrix for class ii and class v preparations. After achieving profound anesthesia, isolation with rubber dam is recommended. Failures of amalgam restorations fracture of the isthmus of a class ii due to insufficient bulk of amalgam marginal failure in proximal box area due to excessive flare of the cavosurface margin recurrent caries failure to extend preparation adequately 17. Dec 01, 2012 design principles for class ii preparations december 1, 2012 by peter walford, dds, fcardp. The primary function of the matrix is to restore anatomic proximal contours and contact areas. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Management of class i and class ii amalgam restorations. Replacement of an old amalgam and restoration of class ii cavities. Conservative preparation designs for class ii amalgam restorations. The first step is the development of the ideal cavity preparation. The advantages of amalgam restorations include resistance to wear, tolerance to a wide range of clinical placement conditions, and. Durability of amalgam in the restoration of class ii. Download as ppt, pdf, txt or read online from scribd.
Class ii restorations using composite resins present a number of technical problems, including the creation of a tight interproximal contact points. Class ii amalgam cavity preparation and restoration youtube. For a more comprehensive understanding of dental caries management, further training and collaboration is strongly encouraged. The rush of technology and the advancement of new concepts have produced a more conservative preparation. Reasons for the replacement of defective amalgam restorations are secondary decay. The most common reasons for replacing amalgam restorations are secondary caries and tooth restoration fractures 70%.
The search plan of the electronic databases included. Preoperative view showing the old amalgam and composite restorations to be replaced. Find powerpoint presentations and slides using the power of, find free presentations research about class 2 amalgam restoration ppt. Sep 24, 2014 restorative material thickness affects the ability of a material to resist fracture. Management of class i and class ii amalgam restorations with. This guide will discuss two forms of restoration, conservative class i restoration, and extensive class i restoration. The advantages of amalgam restorations include resistance to wear, tolerance to a wide range of clinical placement conditions, and excellent loadbearing properties.
In an ideal class ii amalgam preparation in a primary molar, the buccal and lingual walls of the occlusal surface diverge. However, after 30 years, posterior composite preparations have not been formulated into a definitive textbook. The universal tofflemire matrix system is used in class ii restorations. Micro leakage decrease with aging of the amalgam restoration. Pdf the dimensions of everyday classii cavity preparations for. Amalgam must be mixed according to the manufacturers instructions. Amalgam is a restorative material especially suitable for classes i and ii restorations in teeth that encounter heavy chewing forces. Clinical evaluation of reasons for replacement of amalgam. Early failure of class ii resin composite versus class ii. Introduction, cavity prep and retention shows the armamentarium and procedure to prepare the cavity and cut retention in the preparation. A dental restoration or dental filling is a treatment to restore the function, integrity, and morphology of missing tooth structure resulting from caries or external trauma as well as to the replacement of such structure supported by dental implants. Commentary the most common reasons for replacing amalgam restorations are secondary caries and tooth restoration fractures 70%.
Condensation of the amalgam restoration principle objectives during amalgam. Jan 28, 20 amalgam is a restorative material especially suitable for classes i and ii restorations in teeth that encounter heavy chewing forces. It is indicated for carious lesions that are small and away from the pulp more than 1 mm distance. It began with the first abdication of emperor napoleon i and the return of the bourbon king, louis xviii, but was interrupted 1815 by napoleons return the hundred days hundred days, name given to the period after the return of the deposed french emperor, napoleon i, from elba. Thus, the greatest impact on the patients and national dental services expenditures would be to increase the clinical service time of this amalgam restoration type. The evolution of the contemporary cavity preparation sciencedirect.
A class ii amalgam preparation on a primary tooth does not require a gingival bevel because the enamel rods in the area incline gingivally. View and download powerpoint presentations on class 2 amalgam restoration ppt. The minimum amalgam restoration longevity was considered to be 18 months in the present study, since this is the period amalgam, as an appropriate restorative material, should withstand 1. Amalgam restoration bds lecture notes pdf download. The present study, consequently, focus on the clinical performance and causes for the replacement of the class 2 amalgam restoration. Just click on the link below to download bds lecture notes on amalgam restoration in pdf format.
Design principles for class ii preparations december 1, 2012 by peter walford, dds, fcardp. For a cast gold restoration, a gingival bevel is used instead of a shoulder because a bevel 1. After class v gi restoration removal of a thin flush of gi is done by. Using the information from remake request slips in a dental schools predoctoral clinic, we examined the shortterm survival of class ii resin composite restorations versus class ii dental amalgam restorations. Hi guys, i am sharing bds lecture notes on amalgam restoration in pdf format. They are of two broad typesdirect and indirectand are further classified by location and size. A class ii amalgam preparation on a primary tooth does not. Amalgam restoration definition of amalgam restoration by. Initial laboratory screening tests established that the greatest difference in re sistance to bulk fracture of a class ii amalgam restoration was between a cavity. Replacement reasons and service time of classii amalgam.
Marginal quality of class ii composite restorations placed in bulk compared to an incremental technique. Of the two types of aforementioned cavities class ii was found to be the most commonly failed restoration, which accounts for 66. Clinical evaluation of reasons for replacement of amalgam restorations in patients referring to a dental school in iran. This study evaluates whether improvements in the physical properties of dental amalgam affect the use of class ii preparations without an occlusal dovetail.
Class ii cavity preparation introduction a class ii carious lesion develops apical to the contact area on the proximal surfaces of posterior teeth. The importance of the contact point in class ii restorations. Amalgam is used for the restoration of many carious or fractured posterior teeth and in the replacement of failed restorations. Just click on the link below to download bds lecture notes on amalgam restoration in pdf. Amalgam matrix for class ii and class v preparations connected at the proximal box. Restorative dentistry class ii total practice solution. Introduction to amalgam restorations pocket dentistry. Restoration, in french history, the period from 1814 to 1830. Class ii preparation and amalgam restoration rcdp youtube. A conservative technique revisited supports the possibility of remineralization.
Amalgam restoration article about amalgam restoration by. The literature was searched using ovid medline and embase from 1966 to 2006. Choose from 386 different sets of amalgam restoration flashcards on quizlet. Learn amalgam restoration with free interactive flashcards.
Department of health and human services food and drug. Clinical evaluation of interpfoximal retention grooves in class ii. Occasionally, a class iii amalgam restoration may be done if isolation problems exist. Class ii amalgam cavity preparation and restoration done by second year dental students for a class project in 2 rds class. Tooth preparation for class ii amalgam restorations and its modifications. Amalgam preparations reached consensus more than a century ago. Nuha alkanhal gadeer alotaibi haya alsuairy nouf alfawaz 2 rds. Pdf cavity designs for class ii amalgam restorations. Pdf the quality of routine class ii cavity preparations. Contact area carious lesion proximal view vertical section.
In an ideal class ii amalgam preparation in a primary. Feb 15, 2018 hi guys, i am sharing bds lecture notes on amalgam restoration in pdf format. Dec 29, 2017 class ii amalgam cavity preparation and restoration done by second year dental students for a class project in 2 rds class. Pdf analyses of longterm clinical behavior of classii amalgam. Pin amalgam restoration free download as powerpoint presentation. Amalgam cavity preparation class 1 free download as powerpoint presentation. Likewise, in rare clinical situations, class v amalgam restorations may be indicated in anterior areas where esthetics is not an important.
In the student clinic, resin composite is used in approximately 58 percent of class ii restorations placed, and dental amalgam is used in the remaining 42 percent. Tooth preparation for class ii amalgam restorations and its modifications 2. Class ii lesions, with margins located in enamel, on patients with low caries risk. Amalgam restoration an overview sciencedirect topics. Design principles for class ii preparations oral health. The patient has been anesthetized with one carpule of 2% xylocaine with 1. An evaluation of the fracture resistance of class 2 amalgam restorations with different cavity designs on maxillary premolars kundoor shashank, dayanand gopalrao chole, banthu ranga department of conservative and endodontics, pdu dental college, kegaon, solapur, maharashtra, india. Class ii amalgam restoration instructions by dr ywom duration. Amalgam cavity preparation class 1 tooth enamel dentin.
Raghad baidas rah alrefaie rasha alrasheed rana aldakheel. Class ii preparation and amalgam restoration rcdp nora omeir. Condense the class v amalgam restoration and then quickly finish it. Introduction amalgam although a brittle material, has been adequately serving as a restorative material since 175 years, understanding of its properties and judgment of the preparation design are the vital factors controlling its use. It is the least techniques sensitive of all current direct restorations. Amalgam class 2 cavity preparation to remember wedge heavily and protect adjacent teeth start from round smallest bur and then go to cylinder and from high to low speed you need to be from 3 to 3. An evaluation of the fracture resistance of class 2. Introduction a sound restoration cannot begin with a flawed preparation. The quality of routine class ii cavity preparations for amalgam. Should we repair or replace defective amalgam restorations. As there is advancement in the composite resinbased technology, the restorative treatment for amalgam restoration is usually the primary choice for various dental practices 5154.
Class ii amalgam restorations finishing and polishing of amalgam dr. Because the resource is a concise demonstration of the technique of class i amalgam restoration, other important related subjects dental caries and dental materials could not be covered in detail. Introduction, cavity prep and retention lec 4 class v amalgam. The patient has been anesthetized with one carpule of 2 % xylocaine with 1. Replacement of dental restorations has been the traditional treatment for defective restorations. Management of class i and class ii amalgam restorations with localized defects. Class ii silver amalgam preparations will vary with the morphology, anatomy and extent of carious involvement of the individual tooth being. Replacement reasons and service time of classii amalgam restorations in relation to cavity design. Patients pregnancy seems to strongly influence in case of amalgam restoration due to the safety concerns regarding the same.
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