Management of class i and class ii amalgam restorations. Amalgam cavity preparation class 1 free download as powerpoint presentation. The first step is the development of the ideal cavity preparation. Class i cavity preparation for amalgam compatibility mode. Tutorial on class i cavity preparation amalgam restoration. The quality of routine class li cavity preparations for amalgam. A clinical followup was conducted on 7 class i and ii conservative amalgam and composite restorations with varying pulp protection protocols. This preparation, which involves accessing caries by the facial approach, followed the instrumentation sequence used for class iii preparations. These classes are based on the surfaces they involve. Pdf class i cavity preparation for amalgam compatibility mode. When the caries rate is high, the amalgam is chosen over more expensive filling materials. This post will look at these features and why they are relevant generally for class 1 cavities. The outline form for the class i occlusal amalgam tooth preparation should. As an emergency measure, you can even cut off and flatten the tip of a straight probe to be used as amalgam condenser.
Cavity preparation definition of cavity preparation by. Amalgam restorations advantages strong, durable, economical. Dental amalgam is a liquid mercury and metal alloy mixture used in dentistry to fill cavities caused by tooth decay. If an enamel margin was left unsupported during cavity preparation for amalgam. Rodda, modern class ii amalgam cavity preparations new zealand dent j 68. Blacks classification of cavity ppt presentation summary.
Amalgam cavity preparation class 1 tooth enamel dentin scribd. The marginal contour of amalgam condensed into the cavity preparation and packed approximately 1 mm past the cavosurface margin was compared with amalgam margins of restorations which were packed to. Amalgam fillings must engage undercuts within the cavity preparation so they will not dislodge. Extracted human maxillary anterior and mandibular canine teeth were placed in this model in a standardized position for root resection, retrograde cavity preparation and filling with amalgam. The rush of technology and the advancement of new concepts have produced a more conservative preparation. Pdf class i cavity preparation for amalgam compatibility. If the carious lesion is present only in proximal surface and not involve the occlusal surface, the class ii. Amalgam cavity preparation class 1 tooth enamel dentin. The dimensions of the everyday class li cavity preparations for amalgam. Postoperative hypersensitivity and its relationship to.
Find powerpoint presentations and slides using the power of, find free presentations research about class 1 cavity preparation for amalgam ppt. The outline form for a class i amalgam preparation is. The procedure for the removal of the carious lesion is the same as that of a class i. Class ii defects affecting one or both proximal surfaces. Condensation of amalgam condensor stamen is the best one power driven condensation. Displaying principles of class 2 cavity preparation powerpoint presentations g. Patients with localized deficiencies of amalgam restorations that were clinically judged to be suitable for repair or refinishing according to usphs criteria table 1, patients with more than 20 teeth, restorations in functional occlusion with an opposing natural tooth and at least one proximal contact area with an adjacent tooth, patients older than 18 years old. What are the steps for a cavity amalgam preparation for a class i. This study investigated postoperative hypersensitivity at 1, 4, and weeks following resinbased composite rbc restorations of occlusal caries and its relationship with prepreparation baseline sensitivity and preparationrelated variables, including dentin caries activity, cavity dimension and volume, and lesion radiographic visibility.
Premolars with class 2 silver amalgam restorations m h elsherif m n halhoul a a kamar a nour eldin summary. Cavity preparations university of toronto faculty of dentistry. Amalgam class i amalgam preps cavity form flashcards. No snhg reaction product is formed as occurs in the lowcopper amalgam reaction. Operative dentistry principles of cavity preparation for amalgam. Operative dentistry mcqs for world class professionals. Postoperative sensitivity of class i, ii amalgam and. Posterior composite restorations were introduced in the late 1960s and early 1970s. Anterior cavity preparation class iii, class iv and class v almost all class iii and class iv restorations are appropriately restored with composite. 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. Reasons for failure and replacement of class i and class. The most common cause of failure was bulk fracture of amalgam70% followed by recurrent caries16. Smooth surface carious lesions located on the gingivalcervical third of labialbuccal and more rarely the lingual surfaces of all teeth. Conventional class ii preparation gv black guidelines the conventional design resembles a class ii preparation for amalgam with some modification, and is indicated for teeth with proximal lesions and more extensive caries involv ement of the occlusal fissures.
This video will show how to prepare class i cavity for amalgam restoration step by step. Class i and v amalgam tooth preps flashcards quizlet. Amalgam also requires a minimum depth of a millimeter and a half in order to form its crystalline structure while composite fillings have no minimum depth. Cavity preparation is the mechanical alternation of defective, injured or diseased tooth in order to best receive a restorative material that will reestablish a. Pdf the quality of routine class ii cavity preparations. Tutorial on class i cavity preparation amalgam restoration youtube. This fiveyear prospective clinical trial evaluated amalgam restorations with localized defects that were treated by means of repair or refurbishing. Maha almohaimid nura alhedeithi rand alsaif shahad alghanem wassan almanie. Class 2 cavity preparations and restoration performance.
This video will show how to prepare class i cavity for amalgam. Study of the occlusion, together with the remaining tooth contour and position of the adjacent tooth, before starting a cavity preparation, guides the placement of occlusal contacts and marginal ridge height in your restoration. Three different designs of retrograde cavities were evaluated. Tin reacts with copper to form several cusn reaction products. In a cavity preparation cavosurface margin will be junction between. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Contact area carious lesion proximal view vertical section. Class i amalgam restoration amalgam is used for the restoration of many carious and fractured. Unfortunately, we are discovering today that those cavity shapes weaken the posterior dentition and lead to fracturing in even the most conservative applications5,6 fig. Conservative tooth preparation is recommended to protect the pulp, preserve the strength of the tooth, and reduce deterioration of the amalgam restoration. View and download powerpoint presentations on class 1 cavity preparation for amalgam ppt. Key concepts of amalgam cavity design dentalnotebook.
Types of restorations dentistry columbia university. Fiftytwo patients 50% female and 50% male, mean age 28. Adaptation of dental amalgam to the cavosurface margin of. The class ii silver amalgam cavity preparation consists of. A total of 73 teeth with failed amalgam restoration comprising of 35 class i and 38 class ii amalgam restoration was evaluated. For various instruments used during procedure of cavity i preparation. Determination of cavity borders outlines and extention for prevention. Class 1 cavity preparation for amalgam ppt xpowerpoint.
Principles of class 2 cavity preparation ppt xpowerpoint. Class ii cavity preparation introduction a class ii carious lesion develops apical to the contact area on the proximal surfaces of posterior teeth. The adaptation of a range of amalgam alloys to the cavosurface margin of class i cavity preparations was examined for two condensation techniques. Simple lesions as it mostly involves one surface of a tooth. Make sure you have amalgam pluggers with very small working points so that you dont have to widen the cavity to provide convenience form.
Pdf operative dentistry principles of cavity preparation. Cavity preparation designs vary according to extent of damage and the type of. The quality of routine class ii cavity preparations for amalgam article pdf available in acta odontologica scandinavica 471. Farhad hadavi, dmd, ms 1 steps in carving amalgam class 2 cavity 20042005 word to the wise. 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 use with dental amalgam in 1982.
Silver reacts in the same manner as a lowcopper amalgam, forming a gamma1 aghg product. Pdf cavity designs for class ii amalgam restorations. Amalgam cavity preparation class i preclinical operative dentistry dc, du. Lama alkahlan alanoud alsufayan rawan almobarraz rawan alsaif. Lowcopper amalgam commonly consists of mercury 50%, silver 2232%, tin 14%, zinc 8% and other trace metals dental amalgams were first documented in a tang dynasty medical text written by su gong in 659, and appeared in germany in 1528.
Amalgam is a material that is commonly used for restorations. The outline form for a class i amalgam preparation is determined by all of the following except the extent to which the enamel has been involved by the carious process. Pediatric restorative dentistry types of restorations types. Changing concepts in class i and ii cavity preparation. Amalgam cavity preparation class i preclinical operative dentistry dc, du 2. Definition of cavity preparation cavity preparation is the mechanical alternation of a tooth to receive a restorative material, which will return the tooth to proper anatomical form, function, and esthetics. The evolution of the contemporary cavity preparation.
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