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26 Cards in this Set
- Front
- Back
What 4 general aspects are the classification of caries based on? |
1) Anatomical site, progression, and sequence, 2) Extent of tissue involvement and chronology, 3) Number of surfaces and complete removal of decay, 4) Restored surfaces and GV Black’s classifications
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Which 4 specific aspects are used to classify CAVITY PREPARATIONS?
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1) Number of surfaces, 2) complete removal of decay, 3) restored surfaces, 4) GV Black’s classifications
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How did GV Black classify CAVITY PREPARATIONS (3)?
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1) Locations in permanent teeth, 2) Number of surfaces prepared, 3) Tooth surfaces involved in preparation
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Anatomical site
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Whether the carie is occlusal (pits and fissures), Smooth surface (proximal and cervical), or Root carie
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IMPORTANT: Describe caries progression in occlusal caries. Why is this important?
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Progresses like 2 cones base-to-base, where the tip of a cone is at pit/fissure (other tip is below DEJ) and where the bases meet is at the DEJ (Caries spread when they reach the DEJ, then narrow as they reach closer to the pulp); *If caries have not reached the DEJ, it is easier to approximate how far spread out the caries are; If it reaches the DEJ, the extent of spread is larger and harder to estimate, so we must make our preparation bigger
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Describe caries progression in smooth surface caries
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Progresses like 2 cones tip-to-base, where caries spread at enamel then narrow as they go toward the DEJ, then spread again at the DEJ and narrow as they travel toward the pulp
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Where on the smooth surface do caries usually appear?
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Near the gingiva or UNDER the proximal contacts
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How can you diagnose proximal caries?
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ONLY VIA XRAY (not visible to naked eye)
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When do we intervene with operative procedures?
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ONLY WHEN CAVITATION OCCURS
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Cavitation
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Loss of DENTIN, which undermines the enamel; Caries BEYOND the DEJ are considered cavitated (*If carie is still in enamel only or is just at the DEJ but not past it, tooth is not cavitated yet)
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Classification of caries based on progression (3)
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1) Acute, 2) Chronic, 3) Arrested
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Arrested caries
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Dental caries that become stationary or static and don’t show any tendency for further progression
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Classification based on sequence (2)
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Initial/primary decay vs Recurrent/secondary decay
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Classification based on extent of lesion (3)
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1) Incipient (small lesions), 2) Cavitation, 3) Occult
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Occult lesion
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RARE; No changes to enamel except a little demineralization but XRay reveals a cavity in the dentin (*Think: it is a cavity starting from the inside)
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Classification based on tissue involvement (5)
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1) Initial caries, 2) Superficial caries, 3) Moderate caries, 4) Deep caries, 5) Deep complicated caries
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Classification based on chronology (3)
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1) Childhood, 2) Adolescence, 3) Adult
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Classification based on number of surfaces affected (3)
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1) SIMPLE – one tooth surface; 2) COMPOUND – two surfaces; 3) COMPLEX – more than 2 surfaces
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Classification based on surfaces to be restored (6)
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1) Occlusal, 2) Mesial, 3) Distal, 4) Facial, 5) Buccal, 6) Lingual ; *Various combinations are also possible such as MOD for mesio-occluso-distal surfaces
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Which classification has the most widespread clinical utilization for classifying CAVITY PREPARATIONS?
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Based on surfaces to be restored
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Class I
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CAVITIES IN PITS AND FISSURES OF TEETH – Occlusal surface of posterior teeth, facial/lingual surfaces (esp. lingual surface of anterior teeth)
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Class II
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Smooth surface caries on proximal surfaces of POSTERIOR TEETH (Can be compound or complex; Compound is mesial OR distal plus occlusal surface; Complex would involve BOTH mesial and distal plus occlusal surfaces
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Class III
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Smooth surface caries on proximal surfaces of ANTERIOR TEETH; Can be compound like Class III BUT NOT COMPLEX (DOES NOT INVOLVE INCISAL EDGE)
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Class IV
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proximal lesions also involve the incisal edge (ANTERIOR TEETH); * Usually due to trauma/getting hit
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Class V
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Smooth surface lesions that are on the facial or lingual surface of ANTERIOR AND POSTERIOR TEETH in the gingival third; May involve cementum and/or dentin
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Class VI
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Lesions are not necessarily carious; Caused by wear defects on the INCISAL EDGE of anterior teeth or CUSP TIPS of posterior teeth |