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22 Cards in this Set
- Front
- Back
Clamps and their uses
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27 - First and Second primary molars
26 & 14 - First permanent and Second primary molars 14A - Partially erupted permanent molars W8A - Many difficult to clamp molars |
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Pulp chambers of primary teeth
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Generally larger in proportion to crowns and permanent teeth
Mandibular pulp chambers are bigger with pulp horns extending higher into cusps and usually found in each cusp Mesial cusp horns usually extend further into the cusps than the distal pulp horns |
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Special anatomical considerations of primary molars
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Maxillary second primary molar restorations should avoid oblique ridge
Max first primary molar it is acceptable to include only mesial or distal half of the occlusal surface for proximo-occlusal restorations because of shallow anatomy. Mandibular second primary - Has a deep fissured occlusal surface so proximal preparation requires extension across occlusal surface. So a continuous MOD is indicated if both proximal surfaces are carious. Mandibular first primary molar - Has high elevated mesiobuccal and mesiolingual pulphorns toward the occlusal surface. Should not extend across elevated triangular ridge unless caries are present. So 2 separate proximo occlusal orestorations are preferred over one continuous MOD. |
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General type of high speed bur used for operative procedures in primary teeth
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#330 bur for class I, II, and V
1/4 or 1/2 round burs for Class III 1/2 round bur or #35 inverted cone for point and line angle retentive undercuts |
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Types of matrix bands
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Automatrix
Universal Band - Tofflemire matrix Subgingival |
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Cross sectional appearance of a tooth treated with bonded laminate veneer
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Dentin, Enamel, Etched enamel, bonding agent, Lutin resin, Bonding agent, Etched porclain, Porcelain
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Implications of punching holes in rubber dam too close or too far
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Too far - Dam won't fit well between contact area and bulk between teeth can become barrier to proximal restoration
Too close - Saliva leakage can contaminate operative field |
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Basic steps of cavity prep and design for restoring primary incisor with incisal edge involvement
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Doyle introduced prep as jacket crowns which preserves midportion of incisal edge
Main point: Preserve part of incisal edge whenever possible |
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Full coverage techniques for restoring anterior primary teeth
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Stainless steel crowns and direct resin crowns
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Clinical situation for bonded composite veneer
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Good for anterior crown fractures and for increasing mesial-distal widths of permanent anterior teeth
Improves color, contour, mask intrinsic discolorations |
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Rationale for varnishes
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Painted on prep and as it evaporates, it leaves thin resin film behind. Prevents microleakage in the first couple of days but then fills in with corrosion material
Used to prevent microleakage and prevents metallic ions like tin from penetrating into enamel and dentin. |
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Function of cement base
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Promote recovery of injured pulp and protects it against further insult
Acts as thermal insulator to replace missing dentin when used under metal restoration. Must be 0.5mm and have strength so it won't fracture during condensation. |
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Different cements
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Silicate Cements
Zinc Phosphate cements Polycarboxylate cements Glass ionomer cements Zinc Oxide eugenol cements |
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Silicate cements
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No longer used
- Was very resistant to development of recurrent caries b/c there was 15% flouride in the material being slowly released. |
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Zinc phosphate cements
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Made of liquid phosphoric acid and powder zinc oxide
- Good handling characteristics but no anticariogenicity, doesn't adhere to tooth, not very biocompatible |
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Polycarboxylate cements
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Liquid polyacrylic acid and powder zinc oxide
True adhesion to tooth structure with chemical bond with calcium in enamel and hydroxyapetite in dentin. Very good biocompatibility |
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Glass ionomer cements
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Liquid polyacrylic or alkenoic acid with tartaric acid to improve handling.
Fluoro-aluminosilicate glass powder. Releases flouride and has potential adherence to calcium in tooth |
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Zinc oxide eugenol cements
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Acid base reaction to make this
- Low strength, high oral solubility, thus not recommended as permanent cement. But can be used for temporary. Eugenol inhibits additional polymerizing resins so can interfere with subsequent use of resins |
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Composite resin systems & compare
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Microfilled - Extremely small silica filler. Extremely smooth but has a high polymerization shinkage and thermal expansion.
Conventional composite - Macrofilled and normally bis-GMA or Urethane dimethacrylate resin. Reduced polymerization shrinkage and increased hardness. But can be rough. Small particle - Between macro and micro. Best physical properties and can be used in areas of mechanical stress. Hybrid - Combines two types of fillers which are smaller than small particle composites. Most universal and can be used in anterior and posterior. |
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Amphetamine
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Ward off sleepiness, curb appetite, relieve depression
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Frankl Behavioral rating scale
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1- Definitely negative - Crying, refusing treatment
2 - Negative - reluctant to accept treatment, sullen, withdrawn 3 - Positive - accepts treatment 4 - Definitely positive - Lauging, interested Good for shorthand office use but does not communicate enough clinical information for uncooperative child |
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Characteristics of parents
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Overprotective - Prevents progress
Manipulative - Overly demanding Neglectful - Misses appts |