ABSTRACT
Diode laser has been a boon to treat various periodontal diseases in the last decade. Literature cautions that contact of diode laser would be detrimental to bone and leads to bone resorption. However, till date no studies have documented bone damage at different power settings of laser. So, the objective of this study was to evaluate the effects of 980 nm diode laser irradiation on sheep bone under different power settings in continuous wave mode for fixed amount of time. MethodsA fresh femur of sheep devoid of any muscle and soft tissue was obtained. Three markings, each 10 mm long were made for the specimens. The specimens were categorized as sample A, B and C. 980 nm Diode Laser was used to irradiate the specimens with 0.8 W, 1.2 W and 1.4 W at continuous mode as the power settings for sample A, B and C respectively for 10 seconds in direct contact with bone in a brushing like pattern. ResultsThe depth of bone damage was measured using Haematoxylin and Eosin stain. Bone damage was minimum for group 1 followed by group 2 and 3. ConclusionsWhen the specimens were irradiated by a 980 nm diode laser in direct contact with the bone tissue, damage was seen both clinically and microscopically in all groups.
ABSTRACT
This study was carried out to compare the treatment outcome after application of surgical scalpel and sieve methods of diode laser for depigmentation techniques with one year follow up period. METHODSThis was a comparative split mouth intervention study with follow up period of one year. A total of 5 systemically healthy patients, were enrolled in this study. Right and left quadrant were divided into Group A and Group B. In Group A, depigmentation with Sieve method of diode laser and in Group B depigmentation with surgical scalpel technique were used. Dummett Oral Pigmentation Index (DOPI) and Verbal Analogue Scale (VAS) Questionnaires were used to assess the intensity of gingival pigmentation and the pain intensity of the patients respectively. Data was analyzed using SPSS version 2.5 and P value of <0.05 was considered as statistically significant. RESULTSThe pain intensity in Group B (mean rank 1.60, 4.0) was high as compared to Group A (mean rank 0.0, 2.0) at 2 weeks and one month follow up and the results were statistically significant. Group A (mean rank 0.20, 0.80) showed better depigmentation outcome compared group B (mean rank 1.0, 1.80) at six months and one year and the results were statistically significant. CONCLUSIONSSeive method of diode laser therapy showed a significant improvement in gingival pigmentation as well as reduction in pain intensity as compared to surgical scalpel technique.