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Effect of GaAIAs laser on reactional dentinogenesis induction in human teeth
Adriana Nayme Segovia Ferreira1, Landulfo Silveira, Walter João Genovese
1Group of Biomolecular Spectroscopy, Institute of Research and Development (IP&D), University of Vale do Paraíba (UNIVAP), São José dos Campos, Brazil. andriananayme@uol.com.br
Photomedicine and Laser Surgery
|August 1, 2006
Summary
The gallium-aluminum-arsenate (GaAlAs) laser at 670 nm modulated pulp cells, increasing collagen type III, tenascin, and fibronectin expression. This laser treatment promoted reactional dentinogenesis and reduced inflammation in dental tissues.
Area of Science:
- Biomaterials science
- Dental research
- Laser therapy
Background:
- Low-intensity laser radiation demonstrates biomodulatory effects on tissue repair.
- Pulp cells and extracellular matrix components are crucial in dentinogenesis and wound healing.
Purpose of the Study:
- To investigate the biomodulatory effects of a GaAlAs laser on pulp cells.
- To assess the laser's impact on reactional dentinogenesis and specific protein expression (collagen type III, tenascin, fibronectin).
Main Methods:
- Human premolar teeth underwent cavity preparations and were divided into irradiated and control groups.
- The irradiated group received GaAlAs laser treatment (670 nm, 4 J/cm2).
- Histological and immunohistochemical analyses were performed at 14 and 42 days post-treatment.
Main Results:
- The irradiated group showed reduced inflammation compared to controls.
- Reactional dentinogenesis was observed in the 42-day irradiated group.
- Increased expression of collagen type III, tenascin, and fibronectin was noted in irradiated tissues.
Conclusions:
- GaAlAs laser treatment (670 nm, 4 J/cm2) biomodulates pulp cells and influences protein expression.
- The laser promotes reactional dentinogenesis and reduces inflammation in dental tissues.
- The study highlights the potential of specific laser parameters in dental regenerative processes.
