Light Activated Disinfection (LAD) Technique
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Questions and Answers

What is the primary mechanism of action of Light Activated Disinfection (LAD)?

  • Disruption of bacterial cell membranes
  • Production of strong oxidizers (correct)
  • Inhibition of bacterial DNA replication
  • Inhibition of bacterial protein synthesis

    • What is the minimum wavelength of light required for effective LAD?

  • 400nm
  • 600nm (correct)
  • 700nm
  • 500nm

    • Which of the following is NOT an indication for LAD in dentistry?

  • Prosthodontics
  • Endodontics
  • Orthodontics (correct)
  • Periodontics

    • What is the success rate of root canal filling when teeth are NOT sufficiently disinfected beforehand?

    <p>68%</p> Signup and view all the answers

    What type of microorganisms are found in the oral cavity?

    <p>A mix of aerobic and anaerobic bacteria, fungi, mycoplasma, protozoa, and viruses</p> Signup and view all the answers

    When was the method of LAD first known in dentistry?

    <p>1990s</p> Signup and view all the answers

    What is the function of the photosensitizing compound in LAD?

    <p>To absorb light energy</p> Signup and view all the answers

    What is the success rate of root canal filling when teeth are sufficiently disinfected beforehand?

    <p>94%</p> Signup and view all the answers

    What type of compounds are commonly used as photosensitizers in LAD?

    <p>Porphyrins and phenothiazines</p> Signup and view all the answers

    What is the primary goal of LAD in dentistry?

    <p>To reduce the risk of infection during dental procedures</p> Signup and view all the answers

    What is the primary effect of strong oxidizers on targeted cells in LAD?

    <p>Cellular damage</p> Signup and view all the answers

    In which field of dentistry is LAD particularly useful for treating bacterial infections?

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

    What is the primary reason for the use of phenothiazines or porphyrins in LAD?

    <p>To increase the absorption of light</p> Signup and view all the answers

    What is the consequence of insufficient disinfection before root canal filling?

    <p>Reduced success rate of 26 percentage points</p> Signup and view all the answers

    What is the primary advantage of using LAD in dentistry?

    <p>Increasing the success rate of root canal filling</p> Signup and view all the answers

    What is the role of light in LAD?

    <p>Activating the photosensitizing compound</p> Signup and view all the answers

    What is the primary consequence of membrane lysis in LAD?

    <p>Cellular damage</p> Signup and view all the answers

    What is the primary characteristic of the microorganisms found in the oral cavity?

    <p>Complex and interrelated</p> Signup and view all the answers

    What is the primary goal of LAD in the treatment of apical periodontitis?

    <p>Eliminating the infection</p> Signup and view all the answers

    What is the primary advantage of using LAD in Implant Dentistry?

    <p>Reducing the risk of implant failure</p> Signup and view all the answers

    What is the primary effect of strong oxidizers on targeted cells in LAD?

    <p>Cellular damage, membrane lysis, and protein inactivation</p> Signup and view all the answers

    What is the primary advantage of using LAD in dentistry?

    <p>Reduced risk of tooth loss due to bacterial infections</p> Signup and view all the answers

    What is the primary reason for the use of phenothiazines or porphyrins in LAD?

    <p>To activate the photosensitizing compound</p> Signup and view all the answers

    What is the primary consequence of membrane lysis in LAD?

    <p>Cell death and disinfection</p> Signup and view all the answers

    What is the primary characteristic of the microorganisms found in the oral cavity?

    <p>Complex, relatively specific, and highly interrelated</p> Signup and view all the answers

    What is the primary goal of LAD in the treatment of apical periodontitis?

    <p>To eradicate bacterial infections</p> Signup and view all the answers

    What is the primary reason for the use of light in LAD?

    <p>To activate the photosensitizing compound</p> Signup and view all the answers

    What is the primary consequence of insufficient disinfection before root canal filling?

    <p>Reduced success rate of root canal filling</p> Signup and view all the answers

    What is the primary indication for LAD in Endodontics?

    <p>Disinfection of the root canal</p> Signup and view all the answers

    What is the primary advantage of using LAD in Implant Dentistry?

    <p>Reduced risk of implant failure</p> Signup and view all the answers

    Study Notes

    Light Activated Disinfection (LAD)

    • Technique that uses a photosensitizing compound, activated at a specific wavelength of light, to destroy targeted cells via strong oxidizers
    • Causes cellular damage, membrane lysis, and protein inactivation

    LAD Requirements

    • Requires sufficient light intensity to be effective
    • Phenothiazines or porphyrins are used as photosensitizers
    • Effective absorption of light occurs at wavelengths above 600nm

    LAD in Dentistry

    • Oral cavity is colonized by complex microorganisms, including bacteria, fungi, mycoplasma, protozoa, and viruses
    • Method has been known since the 1990s, using different photosensitizers

    Indications for LAD in Dentistry

    • Endodontics
    • Periodontics
    • Oral Surgery
    • Restorative Dentistry
    • Implant Dentistry

    LAD in Endodontics

    • Root canal filling had a success rate of 94% when sufficiently disinfected
    • Teeth not sufficiently disinfected before root canal filling had a success rate of only 68%

    Light Activated Disinfection (LAD)

    • Technique that uses a photosensitizing compound, activated at a specific wavelength of light, to destroy targeted cells via strong oxidizers
    • Causes cellular damage, membrane lysis, and protein inactivation

    LAD Requirements

    • Requires sufficient light intensity to be effective
    • Phenothiazines or porphyrins are used as photosensitizers
    • Effective absorption of light occurs at wavelengths above 600nm

    LAD in Dentistry

    • Oral cavity is colonized by complex microorganisms, including bacteria, fungi, mycoplasma, protozoa, and viruses
    • Method has been known since the 1990s, using different photosensitizers

    Indications for LAD in Dentistry

    • Endodontics
    • Periodontics
    • Oral Surgery
    • Restorative Dentistry
    • Implant Dentistry

    LAD in Endodontics

    • Root canal filling had a success rate of 94% when sufficiently disinfected
    • Teeth not sufficiently disinfected before root canal filling had a success rate of only 68%

    Light Activated Disinfection (LAD)

    • Technique that uses a photosensitizing compound, activated at a specific wavelength of light, to destroy targeted cells via strong oxidizers
    • Causes cellular damage, membrane lysis, and protein inactivation

    LAD Requirements

    • Requires sufficient light intensity to be effective
    • Phenothiazines or porphyrins are used as photosensitizers
    • Effective absorption of light occurs at wavelengths above 600nm

    LAD in Dentistry

    • Oral cavity is colonized by complex microorganisms, including bacteria, fungi, mycoplasma, protozoa, and viruses
    • Method has been known since the 1990s, using different photosensitizers

    Indications for LAD in Dentistry

    • Endodontics
    • Periodontics
    • Oral Surgery
    • Restorative Dentistry
    • Implant Dentistry

    LAD in Endodontics

    • Root canal filling had a success rate of 94% when sufficiently disinfected
    • Teeth not sufficiently disinfected before root canal filling had a success rate of only 68%

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    Related Documents

    CTD WEEK 8.pptx

    Description

    Learn about Light Activated Disinfection (LAD), a novel approach to disinfection that uses a photosensitizing compound to destroy targeted cells. This technique is used to treat bacterial infections.

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