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Connective tissue response to root surfaces resected with Nd:YAG laser or burs
W A Maillet1, C D Torneck, S Friedman
1Department of Endodontics, Dalhousie University, Halifax, NS, Canada.
Summary
Nd:YAG laser root resection shows delayed tissue repair compared to bur resection. This study compared connective tissue response to laser-cut versus bur-cut root surfaces in rats, finding significant differences in healing.
Area of Science:
- Biomaterials science
- Dental research
- Tissue engineering
Background:
- The use of Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers for dental root resection is explored.
- However, the biocompatibility of Nd:YAG laser-ablated root surfaces requires thorough investigation.
Purpose of the Study:
- To evaluate and compare the connective tissue response to root segments prepared with Nd:YAG laser versus conventional bur cutting.
- To assess the histological differences in tissue integration over time.
Main Methods:
- Human endodontically treated teeth were sectioned into 3.5 mm disks using either a water-cooled Nd:YAG laser or a high-speed tungsten fissure bur.
- Sixty-three root disks were implanted subcutaneously in rats and retrieved at various time points (3-90 days).
- Histological analysis focused on inflammation and fibrous capsule thickness.
Main Results:
- Statistically significant differences (p < 0.05) in tissue response were observed between Nd:YAG laser-cut and bur-cut root surfaces.
- Analysis of variation indicated distinct inflammatory and encapsulation patterns.
Conclusions:
- Nd:YAG laser resection resulted in delayed tissue repair compared to bur resection.
- The findings suggest that conventional bur preparation offers superior tissue integration for resected root surfaces.
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