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Published on: July 24, 2018
In-vitro orthodontic bond strength testing: a systematic review and meta-analysis
Katrina J Finnema1, Mutlu Ozcan, Wendy J Post
1Department of Orthodontics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands. k.j.finnema@dmo.umcg.nl
Summary
In vitro orthodontic shear bond strength testing is significantly influenced by experimental conditions. Water storage decreases bond strength, while longer photopolymerization and faster crosshead speeds increase it.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Research
Background:
- In vitro orthodontic shear bond strength testing is crucial for evaluating bracket adhesion.
- Inconsistent reporting of test conditions complicates interpretation of existing literature.
Purpose of the Study:
- To systematically review literature on in vitro orthodontic shear bond strength testing.
- To analyze the influence of various test conditions on bond strength outcomes.
Main Methods:
- Systematic literature search of Embase and Medline databases.
- Meta-analysis using a multilevel model to assess bond strength.
- Independent assessment of study test conditions by two observers.
Main Results:
- 24 of 121 relevant studies were included in the meta-analysis.
- Water storage decreased bond strength by 10.7 MPa.
- Increased photopolymerization time and crosshead speed positively correlated with bond strength.
Conclusions:
- Inadequate reporting of test conditions is a common methodologic drawback in bond strength studies.
- Experimental factors like water storage, photopolymerization time, and crosshead speed significantly impact in vitro bond strength results.
