Sharp and elongated at the dentinoenamel junction round and elongated in the dentin round and short in the dentin sharp and elongated in the dentin. Download class ii cavity preparation muhadharaty ppt for free. A modified class ii cavity preparation for glass ionomer restorative materials. Sturdevant jr, taylor df, leonard rh, straka wf, roberson tm. Waterlase is indicated for class ivi cavity preps, making it a fantastic alternative to traditional tools like drills, scalpels and needles. The gingival cavosurface bevel is a very important step to be performed in class ii cavity preparations for amalgam to remove the undermined enamel rods along the gingival cavosurface margin. Replacement of an old amalgam and restoration of class ii cavities. Find powerpoint presentations and slides using the power of, find free presentations research about class 2 cavity preparation in deciduous teeth ppt. Blacks classification of dental caries is the standard method used in identification of carious lesions according to its location on the tooth surface. The outline form for the class i occlusal amalgam tooth preparation should include only the. Outline is determined by extent of caries, already present restoration with secondary caries. Class ii cavity preparation for extended carious lesion. Displaying powerpoint presentation on class ii cavity preparation muhadharaty available to view or download.
Introduction, cavity prep and retention lec 4 class v amalgam. Instrumentation for class ii, design 8 the occlusoproximal cavity preparation and capping of cusps, short of pulp chamber and root canal preparation, is done in same way as described for designs 1 and 6. The rush of technology and the advancement of new concepts have produced a more conservative preparation. The morphology of the classii resin preparations varied considerably, indicating a lack of precise descriptions in the dental literature. Fiveyear study of class ii restorations in permanent teeth using. This is a topic summary based on varun pandulas blog post and sturdevants art and science of operative dentistry, 5th edition. Tunnel preparations with larger occlusal openings had less residual caries. Lec last class ii indirect gold inlay cavity preparation mandibular left second bicuspid in visidont is prepared for the class ii gold inlay. The outline form for the class i occlusal amalgam tooth preparation should. Apr 30, 2014 class ii cavity preparation for amalgam and variations introduction. Practically, because tooth cavity preparation follows the course of the carious lesion, it has been adopted as g.
This video is meant to help my classmates pass their practical for my school. However, certain fundamentals are common to all class ii silver amalgam cavity preparations. Process of angling, beveling and smoothing cavity walls. Cavity wall terminology and cavity preparations flashcards. A classification system for variations in cavity design and finish has been developed for application on models of teeth with class ii cavities for amalgam restorations. Blacks classification system defines five classes of cavity the sixth class was added later. Protecting the most vulnerable class ii interface class ii total. In general, the tooth preparation for a class iii direct composite restoration involves 1 obtaining access to the defect caries, fracture, noncarious defect, 2 removing faulty structures caries, defective dentin and enamel, defective restoration, base material, and 3 creating the convenience form for the restoration fig. Tooth preparation for class ii amalgam restorations and its modifications 2. Black developed a cavity classification system way back in 1908, and its still in use today.
Since the advent of restorative dentistry, management and treatment of. Modified cavity preparation for class ii amalgam restorations. Class ii defects affecting one or both proximal surfaces. During matrix placement for a class ii cavity preparation, a. Primary preparation of class ii cavities with oscillating. Class ii cavity preparation muhadharaty xpowerpoint.
Based on anatomical location of carious lesion, greene vardiman black g. Oct 12, 2015 this is a video that we made for a class about mod class ii cavity preparations. Later an additional class, class vi was also added. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Class ii cavity preparation introduction a class ii carious lesion develops apical to the contact area on the proximal surfaces of posterior teeth. The above amalgam replacement illustrates a standard class ii posterior composite restoration. Class ii cavities are on the sides and chewing surfaces of your. Design principles for class ii preparations oral health group. Class ii cavity preparation for amalgam and variations. Cracks are mainly due to the combination of two factors, the invasive preparation needed before placing an amalgam which weakens the tooth structure and the. Changing concepts in class i and ii cavity preparation.
Traditional class ii amalgam preparations fall short of minimally invasive principles and are not usually optimal for the initial management of an approximal lesion. If the carious lesion is present only in proximal surface and not involve the occlusal surface, the class ii cavity should include all pits. The survival of resin modified glass ionomer and stainless. Patient dropout after 5 years resulted in the loss of 161 restorations, evenly distributed for restorative material and type of tooth involved. Jan 17, 2011 class ii cavity preparation for dental amalgam. Amalgam cavity preparation class 1 free download as powerpoint presentation.
Class iii, iv, and v direct composite and glass ionomer. Preparation design is seldom detailed in these studies, yet it is describable, measurable, amenable to scientific exploration, and simple enough to develop consensus. The newest waterlase has been shown to cut hard tissue as rapidly as a high speed drill without anesthetic in most cases. As such, major success and high levels of patient satisfaction can be achieved in daily routine. Primary preparation of class ii cavities with oscillating systems. Anterior cavity preparation class iii, class iv and class v almost all class iii and class iv restorations are appropriately restored with composite. Start studying cavity wall terminology and cavity preparations.
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. Blacks classification of tooth preparations cavity. View and download powerpoint presentations on class 2 cavity preparation in deciduous teeth ppt. Blacks preparations were totally accepted by the profession. Extention of the preparation incisally, gingivally, mesially and distally untill the. From the time g v black, father of operative dentistry outlined the principles of cavity preparation, and stressed on extension for prevention, dentistry has taken long strides.
During matrix placement for a class ii cavity preparation. The first step is the development of the ideal cavity preparation. Class 2 cavity preparation in deciduous teeth ppt xpowerpoint. Since the advent of restorative dentistry, management and treatment of posterior proximal caries lesion has posed great. Conservative tooth preparation is recommended to protect the pulp, preserve the strength of the tooth, and reduce deterioration of the amalgam restoration. These cavity classifications are used when recording on the patients chart the type of caries found on the. The class ii silver amalgam cavity preparation consists of.
Apr 30, 2014 class ii cavity preparation for extended carious lesion. Pdf cavity designs for class ii amalgam restorations. Dec 01, 2012 preparation design is seldom detailed in these studies, yet it is describable, measurable, amenable to scientific exploration, and simple enough to develop consensus. Contact area carious lesion proximal view vertical section. Class ii defects affecting one or both proximal surfaces of. Conservative preparation designs for class ii amalgam restorations. Black originally devised five classifications, but a sixth was later added. The evolution of the contemporary cavity preparation. Blacks classification of tooth prepcavities as well. The procedure for the removal of the carious lesion is the same as that of a class i. This article explores the clinical and scientific evidence for preparation axioms for simple to extensive class ii direct composites.
Cavity design and dimensions of tunnel preparations versus. Conservative preparation designs for class ii amalgam. Pdf the quality of routine class ii cavity preparations. Black classified tooth preparations into five different classes. Cavity preparation definition of cavity preparation by.
Then place a radiopaque cavity liner cosmedents renamel demark on the tooth so that you can easily identify your composite on an xray. Initial tooth preparation is defined as establishing the outline form by extension of the external walls to sound tooth structure while maintaining a specified, limited depth usually just inside the dentinoenamel junction dej and providing resistance and retention forms. Class i cavities are in the pits and fissures cracks in your teeth. Class ii silver amalgam preparations will vary with the morphology, anatomy and extent of carious involvement of the individual tooth being restored.
Class ii cavity preparation for amalgam when the lesion present in the proximal surface of premolars and molars, this requires class ii cavity preparation, which is either mo or do or mod. Class i refers to pit and fissure lesions, whereas all other classes are smooth surface lesions. Mcqs on principles of cavity preparation world of dentistry. Twentyfive per cent of the tunnel preparations had residual caries, as opposed to 7% in the classii composite preparations. Class i, ii, and vi amalgam restorations pocket dentistry. Sharp and elongated at the dentinoenamel junction round and elongated in the dentin round and short in the dentin.
The class ii solution represents a safe and rapid complete system, true to the motto class ii everything from a single source. This is a video that we made for a class about mod class ii cavity preparations. It is defined as the mechanical and surgical alteration of a defective, injured or diseased tooth in order to best receive a restorative material which will re establish a healthy state for the tooth including aesthetic corrections where. Retentive grooves in the proximal box of a class ii amalgam cavity should be.
A prepared cavity is best protected from moisture by. Seminar tooth prep class ii amal tooth enamel dentin. The first step in this technique is to remove the old amalgam from the tooth. Amalgam cavity preparation class 1 tooth enamel dentin. Class ii cavity preparation for amalgam and variations introduction. Pdf the quality of routine class ii cavity preparations for amalgam. Most class v restorations that are in esthetic prominent areas are also appropriately restored with composite, in addition to esthetics, these materials with adequate. Pdf the quality of routine class ii cavity preparations for. It is high time we fully realised the importance of preserving healthy tooth structure. Quality of class ii cavity preparations performed by. Introduction, cavity prep and retention shows the armamentarium and procedure to prepare the cavity and cut retention in the preparation. The 23yearold male patient came to our practice for a routine examination. Lec last class ii indirect gold inlay cavity preparation. During matrix placement for a class ii cavity preparation, a wedge is placed to 1.