Dental Calculus Overview
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Questions and Answers

What is the approximate percentage of inorganic components found in dental calculus?

  • 70-90% (correct)
  • 10-30%
  • 20-40%
  • 90-100%

Which of the following is NOT a common site for dental calculus attachment?

  • Dental pulp (correct)
  • Prosthesis
  • Gingival crevice
  • Root surface with periodontal pockets

What is the primary difference between supra and subgingival calculus?

  • Supra is harder than sub
  • Supra is softer than sub
  • Supra is located above the gum line, sub is located below the gum line (correct)
  • Supra is located below the gum line, sub is located above the gum line

What is the term for the thin, acellular layer that forms on the tooth surface and helps calculus adhere?

<p>Acquired pellicle (A)</p> Signup and view all the answers

Which of the following is a crystal found in dental calculus?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following factors can influence the crystalline content of dental calculus?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following is NOT a way calculus can attach to a surface?

<p>Chemical bonding (D)</p> Signup and view all the answers

Why is understanding dental calculus important in the progression of dental disease?

<p>All of the above (D)</p> Signup and view all the answers

What role does an element in the organic matrix play in calculus formation?

<p>It acts as a seeding agent for the formation of calcium phosphate crystals (B)</p> Signup and view all the answers

How do phosphatases and proteases released by bacteria contribute to calculus formation?

<p>They degrade calcification inhibitors present in saliva, promoting the precipitation of calcium phosphate (D)</p> Signup and view all the answers

What is the insoluble calcium phosphate crystal mass called that forms during calculus formation?

<p>Calculus (A)</p> Signup and view all the answers

Which of these is NOT a factor that can influence the rate of calculus accumulation?

<p>The specific type of bacteria present in the mouth (A)</p> Signup and view all the answers

Based on the provided content, how many categories are commonly used to classify individuals based on their calculus formation rate?

<p>4 (B)</p> Signup and view all the answers

What are the two primary methods described for detecting calculus?

<p>Visual examination and radiographs (C)</p> Signup and view all the answers

What is a potential impact of calculus on the clinician?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary impact of calculus on the patient?

<p>All of the above (D)</p> Signup and view all the answers

Flashcards

Dental Calculus

Mineralised bacterial biofilm formed from plaque after 48 hours to 2 weeks.

Composition of Dental Calculus

Contains 10-30% organic material and 70-90% inorganic materials like calcium and magnesium.

Types of Dental Calculus

Classified as supra (above gum) or sub (below gum) based on location.

Crystalline Structure of Calculus

Includes various crystals like brushite, octocalcium phosphate, and hydroxyapatite.

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Formation of Dental Calculus

Theories suggest it forms from biofilm mineralization influenced by saliva.

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Adherence of Calculus

Calculus attaches via acquired pellicle, penetration into tooth structures, or irregularities.

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Relevance of Calculus

Dental calculus is significant in the progression of dental disease, indicating poor oral health.

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Locations of Calculus

Commonly found in gingival crevices, root surfaces, and around prostheses.

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Organic matrix

An element that acts as a seeding agent for calcification.

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Phosphatases and proteases

Enzymes from bacteria that degrade calcification inhibitors.

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Insoluble calcium phosphate crystals

Solid structures that form during calcification, leading to plaque.

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Calculus

A calcified mass of plaque formed from coalescing calcium phosphate crystals.

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Rate of calculus formation

Varies based on individual factors like person, teeth, and time.

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Classification of calculus formers

Persons are categorized as heavy, moderate, slight, or non-calculus formers.

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Radiographs

An imaging technique used to detect calculus.

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Impact on clinician

Understanding calculus formation is crucial for effective treatment.

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Study Notes

Dental Calculus

  • Dental calculus is mineralized bacterial biofilm
  • It forms 48 hours to 2 weeks after plaque biofilm formation
  • It's composed of 10-30% organic material and 70-90% inorganic material
  • Inorganic components include magnesium phosphate, calcium carbonate, and calcium phosphate
  • Organic components include plaque bacteria, dead epithelial cells, and white blood cells
  • Crystals of dental calculus include calcium brushite, octocalcium phosphate, calcium hydroxyapatite, and magnesium whitlockite
  • Crystalline content varies based on factors like location (anterior or posterior teeth, supra or subgingival), age of calculus, and individual differences
  • Calculus can attach to teeth through acquired pellicle, penetration into enamel, cementum, or dentin, or by adhering to tooth irregularities

Learning Outcomes

  • Students should be able to define dental calculus
  • Classify calculus based on location
  • Describe calculus structure and the processes involved in its formation
  • Understand the differences between supra and sub calculus
  • Describe the varying appearances of calculus and how it adheres to teeth
  • Explain the role of calculus in dental disease progression
  • Describe the relevance of dental calculus to dental practice

Calculus Location and Attachment

  • Calculus can form on the gingival crevice, root surfaces with periodontal pockets, and prostheses
  • Calculus adheres to restoration ledges, imbricated teeth, and occlusal surfaces
  • Calculus location relates to the gingivae

Relevance of Calculus

  • Calculus formation rate varies among individuals and across different teeth
  • Individuals can be classified based on calculus formation rate as heavy, moderate, slight, or non-calculus formers
  • Calculus can be detected visually and radiographically

Detection Methods

  • Visual inspection of teeth is a common method of detection
  • Radiographs can also be used to detect calculus
  • Other methods of detection are required

Impact on Clinicians and Patients

  • Clinicians must understand the impact of calculus on patients
  • Considerations must include the impact on treatment choices and the likelihood of recurrence

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Dental Calculus PDF

Description

This quiz covers the essential aspects of dental calculus, including its composition, formation process, and classification based on location. By the end of the quiz, students will be able to define dental calculus and describe its structure and associated processes.

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