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Orthodontic cements and demineralization: an in vitro comparative scanning electron microscope study
V Prabhavathi1, Josy Jacob2, M Shashi Kiran3
1Senior Lecturer, Department of Orthodontics, Raja Rajeshwari Dental College, Bengaluru, Karnataka, India.
Journal of International Oral Health : JIOH
|April 11, 2015
Summary
Conventional glass ionomer cement (GIC) showed the least enamel demineralization potential among tested orthodontic cements. This finding is crucial for selecting materials that minimize tooth decay during orthodontic treatment.
Area of Science:
- Dental Materials Science
- Cariology
- Orthodontic Materials
Background:
- Orthodontic banding requires luting cements that minimize enamel demineralization.
- Four common luting cements were compared: zinc phosphate, conventional glass ionomer cement (GIC), resin-modified GIC, and acid-modified composite resin.
Purpose of the Study:
- To compare the demineralization potential of four different orthodontic luting cements.
- To identify which cement poses the least risk of enamel demineralization.
Main Methods:
- 75 extracted premolar teeth were divided into five groups (n=15).
- Teeth were cemented with one of four luting cements or left as a non-banded control.
- Simulated cariogenic conditions were applied for 4 weeks.
- Scanning electron microscopy and image analysis (Digimizer) were used to measure lesion depth.
Main Results:
- The non-banded control group exhibited the maximum lesion depth.
- Zinc phosphate and acid-modified composite resin showed significant demineralization.
- Resin-modified GIC and conventional GIC demonstrated progressively less demineralization.
Conclusions:
- Conventional GIC has the lowest enamel demineralization potential among the tested cements.
- Resin-modified GIC also shows favorable results, with lower demineralization than acid-modified composite resin and zinc phosphate.
- Material selection is critical for preventing enamel demineralization during orthodontic treatment.
