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University of Bern, Switzerland

Documentation — University of Bern

Nd:YAG High Power Laser as an Adjunctive Therapy in the Treatment of Periodontitis (Dental Research, Göteborg, 2002)

Jensen, J., Heitz-Mayfield. L., Buergin, W. & Lang, N.P.

Genius Nd:YAG (1064 nm) high power laser for the treatment of chronic periodontitis. A randomised controlled trial.

Aim: To evaluate the clinical and microbiological effects of laser surgery compared to gingivectomy for the treatment of chronic periodontitis.


Eight patients with recurrent chronic periodontitis were included in this RCT. In each patient, sites in the control quadrant, with PPD > 4 mm, were treated by scaling and root planing, SRP (n = 29). Sites with PPD > 4 mm (n = 28) in the test quadrant were treated by SRP and laser therapy (Power: 5W). Re-evaluation was at 4–6 weeks post SRP. Thereafter, in seven patients, remaining pockets (PPD > 4 mm) in test and control quadrants were eliminated by either laser (Power: 7 W) or gingivectomy (control).


At baseline, prior to initial therapy, the average PPD was 3.76 ± 0.84 mm and 3.85 ± 0.72 mm in the control and test groups respectively. Six months following the surgical procedures, there was a similar average PPD reduction in the control (0.85 ± 0.49 mm, P<0.0001) and test groups (0.85 ± 0.43 mm, P<0.0001). Also the reduction in BOP in both groups was statistically significant (P<0.001). No statistically significant differences between control and test sites were found for all clinical and most microbiological parameters at baseline or six months post-surgically. Similar reductions in pathogenic bacteria were encountered for both groups.


Nd:YAG (1064 nm) laser surgery in conjunction with scaling and root planing results in a similar treatment outcomes as conventional gingivectomy. An advantage of the use of laser for gingivectomy is that no local anaesthesics or post-surgical dressings are required. This study was supported by the Clinical Research Foundation (CRF), University of Berne.