Class ii composite slot preparation

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Make small Class II tooth preparations! Unfortunately, one of the most-used burs for Class II preparations is a #557. This bur cuts a wide, right-angled slot in the tooth and, because of the cross-striations, makes ultrasonic vibrations in the tooth, potentially causing cracks.

Class II cavity preparation in Primary molars • Complete class 1 using #330 bur • Extend occlusal outline to marginal ridge • Switch to #245 Bur - 3 mm length • Sweep bur buccolingually in a pendulum motion and in a gingival direction. • Break contacts and check with explorer • Axial wall should follow external contour • Width of isthmus 1/3 of occlusal table • Proximal box widest at gingival margin • Rounded axiopulpal line angle • No bevel at the gingival margins Fundamentals of cavity Preparation Pins and slots 5. Dovetail 6. Acid etching (for resin composite restorations) 45. Retention form. 1. Box form. 2. Convergence to occlusal surface (small undercut) A. B. 46. 3. Retention Form Dovetail. 47. Principles of cavity preparation 3. Retention form. Retentive groove . Pins. 48. 49. 50. Retention Slot & Pin. 51. Principles of Cavity Preparation 4. Convenience form • Convenience form : shape/ form of cavity that provide adequate observation & accessibility • ease of operation in ... Contact area carious lesion Proximal view Vertical section - Columbia CTL CLASS II CAVITY PREPARATION CHARACTERISTICS OF AN IDEAL CLASS II Contact area carious lesion Proximal view Vertical section - Buccal view Class II carious lesions are diagnosed using bitewing radiographs. In reading a bitewing radiograph, it is important to know that a proximal lesion that appears to be 2/3 or more through enamel toward the DEJ has actually penetrated the DEJ. It is also important to remember that even if caries have slightly penetrated DEJ, they can still be remineralized ... Composite preparation - SlideShare We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

1. Box-only (slot) Class II Preparation A slot preparation resembles the proximal portion of a conventional preparation without any involvement of the central groove98.Cavity preparation devices: effect on microleakage of Class V resin-based composite restorations.

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Changing concepts in Class I and II cavity preparation

Introducing the Clark Class II Composite Restoration In comparison to amalgam restorations, Class I and Class II composites show significantly higher failureMost of the features of the traditional cavity preparations such as parallel walls, resistance and4: Diagrams of the Clark Class II (a), the slot preparation created by Simonson and others (b)... Understanding The Difference Between Class III and Class… In theory, the Class II Slot Machine falls into the part that permits ‘electronic, computer or other technological aids‘ used in conjunction with a bingo game. Class II machines are in many ways indistinguishable from their Class III cousins. In fact, many of the same popular titles you’d see in a...

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The occlusal cavosurface margins were at right angles to the cusp ridges. This right angle margin allows for a bulk of composite resin at the high-stress-bearing occlusal margin that will prevent fracture of the composite resin. Also, beveling the gingival margin of a class 2 composite resin preparation should be avoided, even if it ends on enamel. Steps Of Cavity Preparation - SlideShare Steps Of Cavity Preparation 1. STEPS OF CAVITY PREPARATION MADE BY: ABHINAV FINAL YEAR 2010-2011 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 .