A comparative study of wound healing following incision with a scalpel, diode laser or Er,Cr:YSGG laser in guinea pig oral mucosa: A histological and immunohistochemical analysis

Acta Odontol Scand. 2010 Jul;68(4):232-8. doi: 10.3109/00016357.2010.492356.

Abstract

Objective: This study compared wound healing following incisions with either a scalpel, a diode laser or an Er,Cr:YSGG laser in guinea pig oral mucosa.

Material and methods: Three types of wound were made randomly with either a stainless-steel scalpel, a diode laser or an Er,Cr:YSGG laser in the buccal mucosa of 24 guinea pigs. Five guinea pigs were sacrificed on each of Days 1, 3, 5 and 7 post-surgery. Four guinea pigs were sacrificed on Day 14 post-surgery. Biopsy samples from each oral mucosa wound were examined using light microscopy and the expression of tumor necrosis factor (TNF)-alpha and transforming growth factor (TGF)-beta1 was determined by immunohistochemical staining. The expression of TNF-alpha and TGF-beta1 was evaluated by calculating the percentage of positively stained cells and immunostaining intensity was evaluated using a scale ranging from 0 to 3.

Results: Infiltration of inflammatory cells decreased rapidly at Day 5 post-surgery in all three groups of animals. The highest level of TNF-alpha expression was found at Day 1 post-surgery for the diode laser wounds. The intensity of TNF-alpha immunostaining was highest at Day 3 post-surgery and lowest at Day 7 post-surgery for all three groups of animals. For the scalpel wounds, a lower level of TGF-beta1 expression was seen until Day 3 post-surgery and a higher level from Day 7 post-surgery compared to laser wounds. The intensity of TGF-beta1 immunostaining was highest at Day 1 post-surgery for the diode laser wounds.

Conclusions: The diode laser is considered a good cutting device for oral mucosa; however, more tissue damage occurs than with the use of a scalpel or an Er,Cr:YSGG laser. Larger studies will be needed before fully endorsing the widespread use of the diode laser.

Publication types

  • Comparative Study

MeSH terms

  • Animals
  • Guinea Pigs
  • Immunoenzyme Techniques
  • Inflammation / metabolism
  • Lasers, Semiconductor / therapeutic use*
  • Lasers, Solid-State / therapeutic use*
  • Male
  • Mouth Mucosa / surgery*
  • Oral Surgical Procedures / instrumentation*
  • Random Allocation
  • Transforming Growth Factor beta1 / biosynthesis
  • Tumor Necrosis Factor-alpha / biosynthesis
  • Wound Healing* / physiology

Substances

  • Transforming Growth Factor beta1
  • Tumor Necrosis Factor-alpha