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- Title
Evaluation of selective calculus removal by a fluorescence feedback-controlled Er:YAG laser in vitro.
- Authors
Krause, Felix; Braun, Andreas; Brede, Olivier; Eberhard, Jörg; Frentzen, Matthias; Jepsen, Søren
- Abstract
Objectives: To evaluate the removal of subgingival calculus and dental hard tissues depending on the threshold level of a fluorescence feedback-controlled Er:YAG laser. Material and Methods: Twenty teeth with calculus on the root surface were treated with an Er:YAG laser. Laser settings were 140 mJ and 10 Hz. The initial fluorescence threshold level of 5 [U] was reduced at intervals of 1 [U] for every laser treatment. Areas of residual calculus (RC) were evaluated using a surface analysis software. Loss of dental hard tissues was assessed by histomorphometric analysis of undecalcified ground sections. Results: Using a threshold value of 5 [U], the median amount of RC was 11% (0–78%). By lowering the threshold levels, the amount of RC decreased [level 1 [U]: 0% (0–26%)]. The laser-treated root surfaces revealed a statistically significant reduction of the cementum thickness [median: 80 μm (0–250)] compared with the non-treated opposite side [median: 90 μm (30–250)] ( p<0.05). Conclusion: The amount of RC following laser irradiation depends on the fluorescence threshold level for a feedback-controlled Er:YAG laser. It might be suggested that this laser system may be used with a threshold level even lower than 5 [U] without removing a clinically relevant amount of root cementum.
- Subjects
PERIODONTAL disease; PERIODONTICS; DENTAL calculus; IRRADIATION; CEMENTUM; LASERS in dentistry; GUIDED tissue regeneration; THERAPEUTICS
- Publication
Journal of Clinical Periodontology, 2007, Vol 34, Issue 1, p66
- ISSN
0303-6979
- Publication type
Article
- DOI
10.1111/j.1600-051X.2006.01026.x