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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

2.4K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
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Veneer01:19

Veneer

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Veneer refers to a thin sheet of wood, typically produced to a thickness of about one-eighth of an inch or less. This material is crafted through various methods, the most common being rotary cutting. In this process, a log is mounted into a large lathe and spun against a knife edge, peeling off a continuous strip of wood as the knife penetrates deeper into the rotating log, creating a rotary-cut veneer.
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
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Teeth01:15

Teeth

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The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
1.9K
Crown Ethers02:36

Crown Ethers

6.2K
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules...
6.2K
Assessment of the Mouth01:26

Assessment of the Mouth

1.3K
A thorough mouth assessment, including inspection and palpation of the lips, gums, tongue, tonsils, uvula, and pharynx, is crucial in detecting potential health issues. Diseases ranging from oral cancer to systemic conditions like diabetes could be identified early through careful oral examination. This article provides a detailed guide on conducting a comprehensive mouth assessment.
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
1.3K
Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

8.3K
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
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Related Experiment Video

Updated: Feb 27, 2026

Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
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Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry

Published on: June 6, 2025

509

Aesthetic preformed crowns for primary teeth.

Greig D Taylor1

  • 1Centre for Oral Health Research, Newcastle University, UK.

Evidence-Based Dentistry
|June 24, 2017
PubMed
Summary

Pre-veneered stainless steel crowns (SSCs) are currently recommended over aesthetic pre-fabricated crowns (APCs) for primary teeth due to limited evidence. Zircon crowns showed better outcomes in short-term studies.

Area of Science:

  • Pediatric Dentistry
  • Restorative Dentistry
  • Dental Materials Science

Background:

  • Aesthetic pre-fabricated crowns (APCs) are an alternative to conventional stainless steel crowns (SSCs) for restoring primary teeth.
  • Evidence comparing the efficacy and safety of APCs versus SSCs in primary dentition is limited.
  • High-quality randomized clinical trials (RCTs) are needed to guide clinical decision-making.

Purpose of the Study:

  • To systematically review existing randomized clinical trials (RCTs) comparing aesthetic pre-fabricated crowns (APCs) with conventional restorative techniques for primary teeth.
  • To assess the available evidence regarding the clinical performance and outcomes of different crown types in primary dentition.

Main Methods:

  • Searched multiple databases including Medline, Cochrane, and clinical trial registries for English-language RCTs.

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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth

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Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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  • Included studies compared APCs with conventional restorative techniques for primary teeth.
  • Two independent reviewers performed study selection and data abstraction; risk of bias was assessed using the Cochrane tool; results were synthesized qualitatively.

    • Main Results:

    • Seven RCTs were included, primarily focusing on primary molars.
    • All studies compared pre-veneered stainless steel crowns (SSCs) with other crown types or different pre-veneered SSCs.
    • High risk of bias was noted across all included studies, with significant variations in outcome measures.

    Conclusions:

    • Current evidence is insufficient to replace stainless steel crowns (SSCs) with aesthetic pre-fabricated crowns (APCs) for restoring decayed primary molar teeth.
    • Zircon crowns demonstrated superior gingival health and fewer crown fractures compared to other options after a six-month follow-up.
    • Further high-quality randomized clinical trials are essential due to the limited number and high risk of bias in existing studies on primary teeth restorations.