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Updated: Apr 20, 2026
Author Spotlight: Unlocking the Mysteries of Oral Potential Malignancies
Published on: August 11, 2023
Biopsy of different oral soft tissues lesions by KTP and diode laser: histological evaluation
Umberto Romeo1, Claudia Russo1, Gaspare Palaia1
1Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Via Caserta 6, 00161 Rome, Italy.
Introduction:
Oral biopsy aims to obtain clear and safe diagnosis; it can be performed by scalpel or laser. The controversy in this latter application is the thermal alteration due to tissue heating. The aim of this study is the histological evaluation of margins of "in vivo" biopsies collected by diode and KTP lasers.
Material And Methods:
17 oral benign lesions biopsies were made by diode 808 nm (SOL, DenMatItalia, Italy) and KTP 532 nm (SmartLite, DEKA, Italy). Samples were observed at OM LEICA DM 2000; margin alterations were evaluated through Leica Application Suite 3.4.
Results:
Epithelial and connective damages were assessed for each pathology with an average of 0.245 mm and a standard deviation of ± 0.162 mm in mucoceles, 0.382 mm ± 0.149 mm in fibromas, 0.336 mm ± 0.106 mm in hyperkeratosis, 0.473 mm ± 0.105 mm in squamous hyperplasia, 0.182 mm in giant cell granuloma, and 0.149 mm in melanotic macula.
Discussion:
The histologic aspect of lesions influenced the response to laser, whereas the greater inflammation and cellularity were linked with the higher thermal signs. Many artifacts were also associated to histologic procedures.
Conclusion:
Both tested lasers permitted sure histologic diagnosis. However, it is suggested to enlarge biopsies of about 0.5 mm, to avoid thermal alterations, especially in inflammatory lesions like oral lichen planus.
