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Moisture insensitive primer: A myth or truth.

Chandresh Shukla1, Rajkumar Maurya2, Upendra Jain1

  • 1Department of Orthodontics and Dentofacial Orthopedics, Peoples College of Dental Sciences and RC, Bhopal, Madhya Pradesh, India.

Journal of Orthodontic Science
|November 27, 2014
PubMed
Summary
This summary is machine-generated.

Moisture insensitive primer (MIP) provides effective orthodontic bonding, showing higher shear bond strength (SBS) without saliva. This primer meets clinical standards, ensuring reliable bracket adhesion even in moist conditions.

Keywords:
Adhesive remnant indexmoisture insensitive primershear bond strength

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Area of Science:

  • Dental Materials Science
  • Orthodontic Adhesion Technology

Background:

  • Orthodontic bracket debonding can be influenced by moisture, affecting bond strength.
  • Moisture insensitive primers (MIPs) are designed to mitigate these effects during bonding.

Purpose of the Study:

  • To compare the mean shear bond strength (SBS) of a moisture insensitive primer (MIP) for orthodontic bonding.
  • To evaluate the impact of saliva presence on the SBS of MIP during bracket bonding.

Main Methods:

  • 60 human premolars were bonded with light-cure adhesive and MIP (Transbond XT and Transbond MIP) in the presence and absence of saliva.
  • Shear bond strength (SBS) was tested using an Instron universal testing machine.
  • Adhesive Remnant Index (ARI) was used to assess bond failure modes under stereomicroscope.

Main Results:

  • Mean SBS was significantly higher in the absence of saliva (9.65 ± 0.90 MPa) compared to the presence of saliva (9.03 ± 1.14 MPa).
  • ARI scores indicated more adhesive remaining on the tooth surface when bonded without saliva.
  • Failure predominantly occurred at the resin-bracket base and resin-adhesive interfaces.

Conclusions:

  • MIP demonstrates effectiveness in both moist and dry conditions for orthodontic bonding.
  • The achieved SBS values exceed the clinical requirement of 7.8 MPa, confirming its suitability for clinical application.