Pediatric Dentistry: Crowns for Primary Teeth
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What are the two primary classifications of crowns for restoring primary teeth based on method of cementation?

  • Metal crowns and Composite crowns
  • Zirconia crowns and Polymer crowns
  • Cemented crowns and Bonded crowns (correct)
  • Bonded crowns and Pre-formed crowns

    • Which type of crown is classified as a cemented crown?

  • Pedo jacket
  • Polycarbonate crowns
  • Strip crowns
  • Stainless steel crowns (correct)

    • Which material is used for the pre-formed metal crowns mentioned in the content?

  • Stainless steel
  • Nickel-chromium (correct)
  • Titanium
  • Gold

    • After which procedure is a pre-formed metal crown (PMC) indicated for use?

    <p>Pulp therapy</p> Signup and view all the answers

    Which of the following is NOT a type of bonded crown?

    <p>Dura crowns</p> Signup and view all the answers

    What is a notable disadvantage of open-faced stainless steel crowns?

    <p>Metal margins visibility</p> Signup and view all the answers

    Which of the following is a key advantage of pre-veneered stainless steel crowns?

    <p>Long durability is ensured</p> Signup and view all the answers

    Which of the following statements is true regarding zirconia pediatric crowns?

    <p>They show superior corrosion resistance</p> Signup and view all the answers

    What is a significant requirement concerning informed consent for procedures involving crowns?

    <p>Potential risk of chipping or loss of facings</p> Signup and view all the answers

    What is a disadvantage of pre-veneered stainless steel crowns compared to conventional SSC?

    <p>Inflexibility and brittleness in resin</p> Signup and view all the answers

    What is a primary use for NuSmile crowns?

    <p>To provide full-coverage restoration for longevity</p> Signup and view all the answers

    What is a major challenge when using pre-veneered stainless steel crowns in crowded dental arches?

    <p>Difficulty in placing multiple crowns</p> Signup and view all the answers

    What is a defining characteristic of the NuSmile ZR crowns?

    <p>They are made from zirconia ceramic</p> Signup and view all the answers

    What is a characteristic feature of pretrimmed crowns?

    <p>They have straight, non-contoured sides.</p> Signup and view all the answers

    What is the primary purpose of reducing the occlusal surface by about 1.5 mm?

    <p>To ensure proper fitting of the crown without occlusal interference.</p> Signup and view all the answers

    What would excessive blanching of the gingival tissues indicate?

    <p>The length of the crown needs to be shortened.</p> Signup and view all the answers

    Which type of stainless steel crown requires minimal trimming and contouring?

    <p>Pre-contoured crowns.</p> Signup and view all the answers

    What is the role of glass ionomer cement in the context of stainless steel crowns?

    <p>It is a primary material used for cementation.</p> Signup and view all the answers

    What procedure should be performed before the cementation of a crown?

    <p>A trial fit to ensure proper seating.</p> Signup and view all the answers

    Which condition is NOT an indication for using zirconia pediatric crowns?

    <p>Extensive caries in permanent molars</p> Signup and view all the answers

    Which statement best describes the need for buccolingual reduction of the tooth?

    <p>It should be minimized unless a prominent feature like Carabelli’s cusp is present.</p> Signup and view all the answers

    What is a disadvantage of using zirconia crowns compared to stainless steel crowns (SSC)?

    <p>Higher cost</p> Signup and view all the answers

    Which preparation step is essential for zirconia crown placement?

    <p>Reduction of the occlusal surface by 2mm</p> Signup and view all the answers

    What is the main disadvantage of stainless steel crowns for primary incisors?

    <p>They lack aesthetic appeal.</p> Signup and view all the answers

    What is a common characteristic of composite resin strip crowns?

    <p>Cannot be sterilized</p> Signup and view all the answers

    Which statement about zirconia crowns is true?

    <p>They provide color stability.</p> Signup and view all the answers

    Which procedure is essential for preparing a tooth for a composite resin strip crown?

    <p>Rubber dam isolation when possible</p> Signup and view all the answers

    Which of the following is a contraindication for using zirconia crowns?

    <p>Deep bite</p> Signup and view all the answers

    In which case would zirconia crowns be the preferred option?

    <p>Extensive caries in primary incisors requiring full coverage</p> Signup and view all the answers

    What is the purpose of using a high-speed tapered diamond carbide bur in the crown preparation process?

    <p>To reduce the incisal height by around 2 mm</p> Signup and view all the answers

    Which feature distinguishes the Pedo Jacket crown from other crown types?

    <p>It is flexible and made of copolyester material</p> Signup and view all the answers

    What is a disadvantage of using Polycarbonate Crowns?

    <p>Poor abrasion resistance</p> Signup and view all the answers

    When is it inappropriate to use Polycarbonate Crowns for dental restoration?

    <p>Bruxism</p> Signup and view all the answers

    Which preparation step is crucial before applying bonding resin to the crown form?

    <p>Etching the enamel for 30 seconds</p> Signup and view all the answers

    What should be done after filling the crown form with composite material?

    <p>Light cure each aspect equally</p> Signup and view all the answers

    What is a primary indication for using Polycarbonate Crowns in children?

    <p>Full coverage restorations of anterior teeth extensively involved with caries</p> Signup and view all the answers

    Which of the following is not a disadvantage of the Pedo Jacket crown?

    <p>Requires extensive polishing before use</p> Signup and view all the answers

    What is a characteristic feature of Cheng crowns?

    <p>They have a stain-resistant facing of pure resin.</p> Signup and view all the answers

    Which type of crown is known for its finely feathered margins?

    <p>Kinder Crowns</p> Signup and view all the answers

    What is a disadvantage of New Millennium crowns?

    <p>They are most technique sensitive.</p> Signup and view all the answers

    Which characteristic applies to Dura Crowns?

    <p>They can be crimped and festooned.</p> Signup and view all the answers

    Which crown type is made of a laboratory enhanced composite resin material?

    <p>New Millennium Crowns</p> Signup and view all the answers

    When are Cheng zirconia crowns primarily utilized?

    <p>For both anterior and posterior teeth.</p> Signup and view all the answers

    What is a key advantage of using Cheng crowns?

    <p>They are less technique sensitive.</p> Signup and view all the answers

    What type of cement is used for cementing Cheng Crowns classic?

    <p>Glass ionomer cement</p> Signup and view all the answers

    Study Notes

    Pediatric Dentistry Crowns

    • Full coverage restorations are common treatments in pediatric dentistry.
    • Crowns are classified by cementation method (cemented or bonded) and by material.

    Crown Classification Based on Method of Cementation

    • Cemented Crowns: Include stainless steel, Cheng, Dura, Kinder Krowns, Pedo pearls, Nusmile, Whiter Biter, Pedo Compu, and EZ Pedo crowns.
    • Bonded Crowns: Include polycarbonate, strip, Pedo jacket, and New millennium crowns.

    Crown Classification Based on Material

    • Stainless Steel Crowns: A common type including untrimmed, pretrimmed, and precontoured varieties..
    • Preveneered Stainless Steel Crowns: Combinations of stainless steel and composite resin for improved aesthetics.
    • Polymer Crowns: Include polycarbonate types.
    • Composite Crowns: Used for aesthetic purposes.
    • Zirconia Crowns: Metal-free, superior corrosion resistance, high wear resistance, and excellent biocompatibility; available in various types (EZ Pedo, NuSmile, Cheng, Kinder).
    • Open-faced Stainless Steel Crowns: Reliable and durable, but may have poor aesthetics; the buccal aspect can be cut away for improved aesthetic.
    • Composite Resin Strip Crowns: Preferred material choice for primary anterior teeth because of aesthetics.

    Indications for Crowns

    • Pulp therapy in primary molars
    • Extensive decay in primary teeth
    • Children requiring general anesthesia
    • Severe bruxism
    • Rampant/recurrent caries
    • Severe enamel defects in permanent molars
    • Space maintenance

    Hall Technique

    • A simplified technique for the treatment of primary teeth.
    • Doesn't require local anesthesia, tooth preparation, or caries excavation.

    Molar-Incisor Hypomineralization

    • A clinical condition affecting primary molars, demanding treatment with appropriate crowns.

    Crowns in Multi-Surface Restorations

    • Preformed metal crowns (PMC/SSCs) show greater longevity than resin-based or amalgam restorations.
    • High-risk children with widespread caries may require SSCs with complex procedures including general anesthesia.

    Contraindications for Crowns

    • Aesthetic concerns
    • Molars close to exfoliation
    • Caries extending to the tooth roots
    • Cases beyond possible repair

    Advantages of Crowns

    • Durable
    • Protects remaining tooth structure weakened by extensive decay.
    • Less technique sensitive
    • Cost-effective
    • Low failure rate.

    Disadvantages of Crowns

    • Unesthetic due to metallic appearance (in some types)
    • Cannot be used on partially erupted teeth.
    • Some parents/guardians may find the appearance unacceptable, necessitating careful communication.
    • Use of pre-veneered crowns may cause additional clinical time.
    • Crowns may be too thick or too fragile.

    Types of Stainless Steel Crowns Based on Morphology

    • Untrimmed crowns
    • Pretrimmed crowns
    • Precontoured crowns

    Composite Resin Strip Crowns: Advantages and Disadvantages

    • Advantages: Quick, simple procedure, cheaper than zirconia.
    • Disadvantages: Cannot be sterilized, not as strong as zirconia.

    Methods for Crown Placement

    • Local anesthesia and rubber dam isolation are crucial.
    • Reducing occlusal surface.
    • Preparing interproximal areas.
    • Occlusal reduction.
    • Adjusting buccolingual reduction.

    Polycarbonate Crowns (bonded crown)

    • Another type of preformed full-coverage crown made of heat-molded acrylic resin.
    • Bonded using resin cement..
    • Common types: 3M ESPE Polycarbonate, Kudos polycarbonate, PedoNatural.
    • Indications: Full coverage restorations in anterior teeth with extensive caries, malformed or fractured anterior teeth, discolored anterior teeth, after pulpectomy procedures.
    • Contraindications: Bruxism, excessive abrasion to anterior teeth.
    • Advantages: Improved esthetics, Extreme dimensional stability, Less chair side Time.
    • Disadvantages: Poor abrasion resistance, Poor retention form, frequently dislodged if tooth is heavily destroyed.

    Cheng Crowns (cemented crown)

    • Available in two forms (classic and zirconia).
    • Stain resistant.
    • Indications: Various applications including anterior and posterior teeth.

    Kinder Crowns (cemented crown)

    • Introduced in 1989.
    • Finely feathered margins.
    • Aesthetic profile..
    • Available as zirconia and preveneered types.

    Dura Crowns (cemented crown)

    • High-density crowns, often made of polyethylene veneer.
    • Can be crimped, trimmed, or festooned.
    • Advantages: Esthetic potential, trimming, and crimping.
    • Disadvantages: Prone to moisture or hemorrhage complications.

    New Millennium Crowns (bonded crown)

    • Made of enhanced composite resin material.
    • Very esthetic, but brittle.
    • Expensive.
    • Advantages: High esthetic value, High Parental satisfaction.
    • Disadvantages: High sensitivity to technique, proper isolation necessary.
    • Indications: Extensive caries, congenitally malformed incisors, discolorations, fractures, developmental defects like amelogensis imperfecta.
    • Contraindications: insufficient tooth structure, problematic moisture control, deep overbites, periodontal disease.

    PedoPearls

    • Aluminum coating with tooth-colored epoxy paint.
    • Relatively soft; can easily wear off over time.

    Figaro Crowns (cemented crown)

    • Made of fiberglass layers held together by epoxy resin.
    • Small amounts of Titanium Dioxide and Yellow Iron oxide are added for cosmetic affect.
    • Biocompatible, strong, safe, cost-effective, metal-free, autoclavable
    • Indications and contraindications are not included

    General Considerations

    • Informed consent should include potential issues like chipping, loss of facings, extended procedure times, and pulpotomy options.
    • No finish line is required for preparation of pediatric crowns.

    Materials

    • Various burs, pliers, and cements are mentioned throughout the document.

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    Full Coverage in Pediatric Dentistry PDF

    Description

    Test your knowledge on the classifications of crowns used in pediatric dentistry for restoring primary teeth. This quiz covers material types, indications, advantages, and disadvantages of various crown options. Perfect for dental students and professionals looking to refresh their understanding of pediatric restorative techniques.

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