Questions and Answers
What is normally apparent during a clinical examination?
buccal pits
Buccal pits are most commonly located at the termination of which grooves?
B groove or the DB groove
What is the size of buccal pit caries?
Normally, only a small defect in the pit area; occasionally larger carious areas
Where is the mandibular 1st molar buccal pit located?
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Where is the mandibular 2nd molar buccal pit located?
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Where are the lingual pits located in maxillary anteriors?
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List some locations of pits in teeth.
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What may contribute to pits and grooves and fissures' high susceptibility to caries?
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The depth of the groove and pit _________________.
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The central groove extends from the _____ pit to the ______ pit.
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Sometimes grooves extend onto marginal ridges.
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The termination of pits and fissures may vary from a _____________ _____________ to __________________ _______________ of enamel.
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What results from complete coalescence of the enamel developmental lobes?
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What cleanses grooves and fossae involved in masticatory action?
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What is the most susceptible site for caries initiation?
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What does imperfect coalescence of the developmental enamel lobes result in?
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How does dentin caries initially spread?
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What two types of bacteria are harbored in pits and fissures?
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What does the relative proportion of MS determine?
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What usually follows the appearance of MS in pits and fissures?
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What may be the most important event in a tooth's resistance to caries in susceptible patients?
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How do buccal pit caries appear in radiographs when small?
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What does the outline form of buccal pit cavity prep ideally include?
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What shapes may the outline form be? (Select all that apply)
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What does the shape of the pit restoration depend on?
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What burs may be used in this prep? (Select all that apply)
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Width of round and oval prep should be _____________.
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Height of round and oval prep should be _____________.
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Width of triangular prep is ____________.
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Height of triangular prep is ____________.
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The angulation of the mesial and distal wall is ____________ to the enamel rods.
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The walls should create a __________ degree cavosurface angle to the curving surface.
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Depth of prep should be ______________.
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What is the axial wall prep shape?
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The M-D walls should converge slightly to parallel the enamel rods.
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What should happen to the O-G walls?
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What does the axial wall ideal prep shape prevent?
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Is there a need for line angles to be placed in buccal pit prep?
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How is retention form developed in this prep?
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When would you need retentive grooves?
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Cavosurface margins should be:
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Are all buccal pits amalgam restorations?
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What is the first step in the restoration procedure?
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When carving you should ensure to:
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Study Notes
Buccal Pit Amalgam Preparation and Restoration
- Buccal pits are typically identified during a clinical examination.
- Common locations for buccal pits are at the termination of the B groove or DB groove.
- Caries in buccal pits usually presents as small defects, although severe cases may affect the entire groove.
- In mandibular first molars, the B groove separates the MB and DB cusps, often ending in a deep pit.
- The B groove of mandibular second molars may also terminate in a pit on the middle of the buccal surface.
- Maxillary anterior teeth often feature lingual pits.
- Pits can occur in mandibular molars, anterior teeth, and the Cusp of Carabelli.
- The Cusp of Carabelli typically presents as a lingual pit; focus on prepping the pit rather than the groove to conserve tooth structure.
- Pits and grooves are susceptible to caries due to their varied morphologies.
- The depth of grooves and pits varies significantly.
- The central groove connects the mesial and distal pits.
- Grooves may extend onto marginal ridges.
- Pits and fissures can terminate with shallow grooves or penetrate completely into enamel.
- Complete coalescence of enamel developmental lobes results in grooves and fossae.
- Masticatory action naturally cleanses grooves and fossae by rubbing food against them.
- Developmental pits and fissures are highly susceptible to caries initiation.
- Impaired coalescence of enamel lobes yields surface pits and fissures.
- Dentin caries spread laterally along the dentin-enamel junction (DEJ) and penetrate towards the pulp via dentin tubules.
- Pits and fissures provide mechanical shelter for bacteria, particularly Streptococcus sanguis and other streptococci.
- The mix of mutans streptococci (MS) influences the cariogenic potential of pits and fissures.
- Presence of MS in pits and fissures typically precedes caries within 6 to 24 months.
- Sealing pits and fissures shortly after tooth eruption may be crucial in enhancing resistance to caries in vulnerable patients.
- Buccal pit caries are represented in radiographs as small round radiolucencies that enlarge to an ellipsoid or semi-lunar shape.
- The ideal outline form for buccal pit cavity preparations includes the entire pit area and any carious portions of the buccal groove.
- Outline shapes can be triangular, round, or oval (capsular).
- Burs suitable for preparation include 330, 245, and 169L.
- Width for round and oval preparations should not exceed 1mm, with a height of 2mm.
- Triangular preparation dimensions are 1.5mm in width and height.
- For resistance form, mesial and distal walls should be parallel to the enamel rods, promoting convergence.
- A 90-degree cavosurface angle is ideal concerning the curving surface.
- The prep depth should be 1.5mm from the cavosurface, ensuring the axial wall is in dentin.
- The axial wall should gently curve to conform to the tooth's external contour.
- Mesio-distal walls should converge slightly to parallel the enamel rods.
- Occluso-gingival walls should slightly diverge and remain parallel to the enamel rods.
- Proper axial wall shaping prevents excessive cutting in wider preparations.
- No need for accentuating line angles in an ideal buccal pit prep; resistance form itself provides sufficient retention.
- Retention form is achieved by aligning cavity walls parallel to the direction of enamel rods, similar to Class I occlusal prep.
- Retentive grooves may be necessary when caries are extensive or in circular preparations to prevent rotation.
- Cavosurface margins should form a butt joint at 90 degrees with no bevels or undermined enamel.
- Not all buccal pit restorations require amalgam; some can be effectively treated with composite materials.
- The amalgam restoration procedure involves placing amalgam using a small carrier, condensing laterally to ensure filling, and carving back to anatomical shape.
- Carving should involve M-D motions, maintaining contact with tooth structure, and focusing on the correct facial groove anatomy.
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Description
This quiz covers key concepts related to buccal pit amalgam preparation and restoration. It includes definitions and common locations for buccal pits, as well as information about caries size. Perfect for dental students and professionals looking to reinforce their knowledge.
