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Morpho-structural aspects of Er:YAG-prepared class V cavities
Manlio Curti1, Jean-Paul Rocca, Marie-France Bertrand
1Laboratory Surfaces Interfaces. UFR Odontologie. Université de Nice Sophia Antipolis, Nice Cedex, France.
Journal of Clinical Laser Medicine & Surgery
|May 29, 2004
Summary
The Er:YAG laser creates jagged class V cavities with opened dentinal tubules, unlike conventional rotary instruments. Further research is needed to assess lased dentin properties and bonded resin strength.
Area of Science:
- Dental materials science
- Laser dentistry
- Restorative dentistry
Background:
- Dental caries management often involves cavity preparation using rotary instruments.
- Minimally invasive cavity preparation techniques are gaining traction in restorative dentistry.
- Laser technology offers potential alternatives for dental procedures.
Purpose of the Study:
- To compare the efficacy of Er:YAG laser preparation of class V cavities with conventional rotary instruments.
- To evaluate the surface characteristics and dentinal tubule exposure resulting from Er:YAG laser cavity preparation.
Main Methods:
- Twenty-six human molars were prepared with either rotary instruments (diamond/tungsten burs) or an Er:YAG laser.
- Cavities were prepared using specific energy and frequency parameters for enamel and dentin with water irrigation.
- Scanning Electron Microscopy (SEM) was used to examine the prepared cavity surfaces.
Main Results:
- Er:YAG laser preparation resulted in irregular, jagged cavity walls with clear hydroxyapatite prism cleavage in enamel.
- The laser treatment led to an homogeneous dentin surface with widely opened dentinal tubules.
- Conventional rotary instruments produced smoother cavity walls with a smear layer and fewer opened tubules.
Conclusions:
- Er:YAG laser preparation of class V cavities is characterized by jagged outlines and opened dentinal tubules.
- The distinct surface morphology created by the laser warrants further investigation.
- Future studies should explore the ultrastructural and histochemical properties of laser-prepared dentin and its effect on bonded restorative materials.
