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Does surface enamel composition and characteristics vary with inter proximal enamel reduction?
Kishore B Poovattil1, Haritha P Sathyanarayana1, Sridevi Padmanabhan2
1Department of Orthodontics, Sri Ramachandra Dental College, SRIHER, 1, Ramachandra Nagar, Porur, Chennai, 600116, India.
Clinical Oral Investigations
|February 26, 2024
Summary
Interproximal reduction (IPR) in orthodontics creates rougher enamel surfaces but does not significantly alter the chemical composition or mineral content of the enamel. This study found no significant difference in elements like calcium and phosphorus between reduced and unreduced enamel.
Area of Science:
- Dental materials science
- Orthodontic technology
- Enamel surface analysis
Background:
- Interproximal reduction (IPR) is a common orthodontic procedure.
- Concerns exist regarding potential demineralization and increased caries risk after IPR.
- Limited in vivo data evaluates enamel's chemical changes post-IPR.
Purpose of the Study:
- To assess the chemical composition of proximal enamel surfaces.
- To characterize surface changes after varying degrees of interproximal reduction (IPR).
- To evaluate the impact of IPR on enamel mineral content in a clinical setting.
Main Methods:
- Premolars designated for extraction underwent .2 mm, .3 mm, or .5 mm of IPR.
- Teeth were extracted after one month.
- Scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDX) analyzed enamel surfaces.
Main Results:
- SEM revealed irregular, rough enamel surfaces post-IPR compared to the control group's honeycomb pattern.
- Minor enamel erosion was observed at higher magnification in the .2 mm IPR group.
- All analyzed enamel surfaces contained calcium, phosphorus, carbon, oxygen, and nitrogen.
- No statistically significant differences in elemental composition or Ca/P ratios were found between groups.
Conclusions:
- IPR results in surface irregularities and roughness but does not significantly alter enamel's elemental composition.
- The mineral content (calcium and phosphorus) of enamel remains statistically unchanged after IPR.
- Findings support the clinical safety and validity of the IPR protocol regarding enamel integrity.
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