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Related Experiment Videos

Comparative evaluation of ceramic bracket base designs

J M Bordeaux1, R N Moore, M D Bagby

  • 1Department of Orthodontics, University of Nebraska Medical Center, College of Dentistry, Lincoln.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|June 1, 1994
PubMed
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Second-generation ceramic brackets showed no enamel damage during debonding. Transcend 2000 exhibited the highest shear bond strength, while Intrigue had the highest tensile bond strength but also experienced bracket fractures.

Area of Science:

  • Orthodontics
  • Biomaterials Science
  • Dental Materials

Background:

  • Ceramic bracket base designs have evolved to minimize tooth damage during debonding.
  • Understanding bond strength and fracture patterns is crucial for clinical application.

Purpose of the Study:

  • To compare the shear and tensile bond strengths of four second-generation ceramic brackets.
  • To evaluate fracture sites and modes of ceramic and stainless steel brackets after debonding.

Main Methods:

  • Four types of second-generation ceramic brackets and one stainless steel bracket were bonded to bovine incisor teeth.
  • Samples underwent thermocycling before debonding using shear and tensile forces with a universal testing machine.
  • Fracture sites were analyzed using a light microscope.

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Main Results:

  • Transcend 2000 demonstrated the highest mean shear bond strength (228.0 kg/cm²), while Intrigue showed the highest mean tensile bond strength (51.3 kg/cm²).
  • No enamel damage was observed with any ceramic brackets.
  • Intrigue experienced bracket fractures in 30% of tensile tests and 20% of shear tests.

Conclusions:

  • Second-generation ceramic brackets generally provide sufficient bond strength without causing enamel damage.
  • Transcend 2000 and Intrigue show promising results in terms of bond strength, though Intrigue's fracture rate warrants consideration.