Randomized Controlled Trial of a Novel Laser-aided Orthodontic-periodontal Treatment Strategy

On the basis of the investigators' pilot study results, 35 patients with chronic periodontitis will be recruited and initially treated for inflammation. Using a randomized split-mouth design,the teeth in experimental (laser) group will receive LLLT while the teeth in the control (placebo) group will receive no laser treatment. The effects of LLLT in orthodontic-periodontal treatment on periodontal inflammation control, jawbone remodeling, reduction of tooth sensitivity, pain relief and quality of life will be investigated.

Inclusion criteria

• Systemically health (with special regard to disease affecting tissue repair);
• No medications required for periodontal therapy and no use of any antibiotic and/or anti-inflammatory medication in the preceding month;
• Chronic periodontitis with at least two pairs (clinically matched) displaced single-rooted teeth (each pair of teeth is in the same arch but in two contralateral hemi-arches respectively belonging to the same tooth typology) having at least one site probing depth of 5 mm or more, interproximal attachment loss of 3 mm or more, and radiographic signs of alveolar bone loss.
• Periodontal status confirmed by periodontal evaluation remains stable for at least 6 months after complete periodontal treatment.

Exclusion criteria

• smoking;
• pregnancy;
• under orthodontic treatment.