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Caries in the primary dentition
Restorative treatment
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Caries treatment:
•Pre-cavitation lesion prevention
•Cavity formation restoration and prevention
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Early childhood caries(formerly baby bottle/nursing bottle caries)
• The presence of one or more decayed (non-cavitated or cavitatedlesions), missing teeth (due to caries), or filled tooth surfaces in any primary tooth in a child 72 of months age or younger.
• In children younger than 3 years of age, any sign of smooth-surface caries is indicative of severe early childhood caries (S-ECC). From ages 3 through 5, one or more cavitated, missing teeth (due to caries), or filled smooth surfaces in primary maxillary anterior teeth, or decayed, missing, or filled score of ≥4 (age 3), ≥5 (age 4), or ≥6 (age 5) surfaces constitutes S-ECC.
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Aetiology of nursing bottle caries
• Long periods of exposure to cariogenic substrate. The teat is held next to the palatal surfaces of the upper anterior teeth for up to 8 hours.
• Low salivary flow rate at night, and reduced buffering
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Nursing bottle caries
• Prevalence 2.5-15 %
• Rampant caries starts at the neonatal line, affects mostly maxillary anterior teeth
• Lesions appear later on posterior teeth. Canines are affected less than first molars because of later eruption
• Mandibular anterior teeth are unaffected because of salivary flow and position of tongue
• Bottle is often used as a pacifier to get infant to sleep
• The bottle can contain any liquid with fermentable carbohydrate
• This pattern of caries may also occur with prolonged at-will breast feeding
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Management of ECC
• Cessation of habit
• Fluoride application
• Build-ups of restorable teeth (GIC, composite resin – strip crowns, SSCs)
• Pulpal involvement endodontic treatment
• Extractions if required (loss of upper anterior teeth will not result in space loss if the canines have erupted)
• Treatment under general anaesthesia is often required for small children
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Restorative materials
•Amalgam
•Glass-ionomers• Glass-ionomer cements (GICs)• Resin-modified glass-ionomers (RMGI)• Polyacid-modified composite resins (PMCR,
compomers)
•Composite resins
•Stainless-steel crowns
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The choice of restorative material depends on:
•Cavity shape and size
•The age of the child and the tooth
•Caries risk
•Cooperation of the child
•Special requirements
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Rubber dam isolation
•Quickdam• clamp, floss, wooden wedge or „Wedjet”• „through” or slit (split) dam technique
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Amalgam
Advantages:
• Simple
• Quick
• Cheap
• Technique insensitive
• Durable
Disadvantages:
• Not adhesive
• Requires mechanical retention in cavity
• Environmental and occupational hazards
• Public concerns
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Influences of primary tooth morphologyTooth preparation
•Mesiobuccal pulp horns of primary first molars extend higher occlusally in case of caries media preventive pulpotomy required
•Prominent mesiobuccal cervical bulges (cingulum) reduced depth of proximal box
•Narrow occlusal table altered occlusal preparation
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Class I
Outline form:Conservative Include all carious area &
retentive fissure Cavosurface margin: out of
the stress area, no bevelRounded line angel
Depth: ideally : 0.5 mm in dentin deep cavity: liner, base
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Common errors in class I
•Deep cavity
•Remaining caries
•Undermining the marginal ridge
•Undercarving /overcarving
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Class II restoration
Proximal Box:
• Broader at the cervical portion than the occlusal portion
• Open the contact with the adjacent tooth (buccal, lingual, gingival)
• Flat gingival seat with no bevel (1mm)
• Remove undermining enamel
Axial wall : 0.5 mm into dentin
follow the outer proximal contour
Axiopulpal line angel: rounded
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Matrix application
• Tofflemire
• Auto matrix systems
• Sectional matrices
• T-band
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Polishing of amalgam
• 24 hours later!!!
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Indications of stainless-steel crowns:
•Grossly broken-down teeth (3 or more carious surfaces)
•Primary molars after pulp therapy
•Hypoplastic primary or permanent teeth
•High caries frequency
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Stainless-steel crowns
Advantages:
•Very durable
•Protect and support remaining tooth structure
Disadvantages:
•Extensive tooth preparation
•Patient cooperation required
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Composite resins
Advantages:
•Adhesive
•Aesthetic
•Reasonable wear properties
•Command set
Disadvantages:
•Technique sensitive
•Good isolation required (rubber dam)
•Problem of secondary caries diagnosis
•Expensive
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Indications of composites in the primary dentition:
•Restoration of anterior teeth (nursing bottle caries or trauma) • Composite resin strip crown• Incisal edge replacement
•Class I and II cavities in children with good cooperation (isolation) and low caries rate
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Composite resin crown
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Glass-ionomer cements
Advantages:
•Adhesive
•Aesthetic (?)
•Fluoride leaching
Disadvantages:
• Long setting time
•Brittle
•Susceptible to erosion and wear
•Radiolucent
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Indications of glass ionomer cements in the primary dentition:
•Class III, V and small Class I cavities, where aesthetics is secondary
•Semi-permanent restoration of Class II lesions (1-2 years)
•High caries risk
•ART (Atraumatic Restorative Treatment)
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Condensable glass ionomer cements
•High powder : liquid ratio, viscous, self-curing materials
•Better physical properties, reduced sensitivity to water
•Products: Fuji IX (GC), Ketac Molar (Espe), Chemflex (Dentsply)
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Resin-modified glass-ionomer cements(RMGI)
• Dual-cure materials (acid-base reaction, light-inducedfree radical polymerisation): Fuji II LC (GC), Photac FilQuick (Espe)
• Triple-cure materials (acid-base reaction, light-inducedand self-induced free radical polymerisation): Vitremer(3M)
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Resin-modified glass-ionomer cements
Advantages:
•Adhesive
•Aesthetic
•Command set
•Fluoride release
•Simple to handle (?)
Disadvantages:
•Some are radiolucent
•Unknown durability
•Water absorption
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Indications of RMGIs in the primary dentition:
•Class III, V and I cavities
•Class II restorations for not more than 2 or 3 years
•High caries risk
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Polyacid-modified composite resins(compomers)
Advantages:
•Adhesive
•Aesthetic
•Command set
•Simple to handle
•Radiopacity
Disadvantages:
•Unknown durability
•Water absorption
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Indication of compomers in the primary dentition:
•Class I-V cavities, but• In grossly broken-down primary molars stainless-
steel crowns,• In case of nursing bottle caries composite strip
crowns are preferred