Effect of laser phototherapy on human alveolar bone repair: micro tomographic and histomorphometrical analysis

Marcia M. A. Romão; Márcia M. Marques; Arthur R. G. Cortes; Anna C. R. T. Horliana; Maria S. Moreira; Cesar A. Lascala

doi:10.1117/12.2181041

19 June 2015 Effect of laser phototherapy on human alveolar bone repair: micro tomographic and histomorphometrical analysis

Marcia M. A. Romão, Márcia M. Marques, Arthur R. G. Cortes, Anna C. R. T. Horliana, Maria S. Moreira, Cesar A. Lascala

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Proceedings Volume 9531, Biophotonics South America; 95312N (2015) https://doi.org/10.1117/12.2181041
Event: SPIE Biophotonics South America, 2015, Rio de Janeiro, Brazil

Abstract

The immediate dental implant placement in the molars region is critical, because of the high amount of bone loss and the discrepancy between the alveolar crest thickness and the dental implant platform. Laser phototherapy (LPT) improves bone repair thus could accelerate the implant placement. Twenty patients were selected for the study. Ten patients were submitted to LPT with GaAlAs diode laser (808nm) during molar extraction, immediately after, 24h, 48h, 72h, 96h and 7 days. The irradiations were applied in contact and punctual mode (100mW, 0.04cm2, 0.75J/cm2, 30s per point, 3J per point). The control group (n=10) received the same treatment; however with the power of the laser off. Forty days later samples of the tissue formed inside the sockets were obtained for further microtomography (microCTs) and histomorphometry analyses. Data were compared by the Student t test, whereas those from the different microCT parameters were compared by the Pearson correlation test (p<0.05). The relative bone volume, as well as area was significantly higher (p<0.001) in the lased than the control group. In the control group there were negative correlations between number and thickness, and between number and separation of trabecula (p<0.01). Between thickness and separation of trabecula the correlation was positive (p<0.01). The laser group showed significant negative correlation between the number and the thickness of trabecula (p<0.01). LPT accelerated bone repair. By the Pearson correlation test it was possible to infer that the lased group presented a more homogeneous trabecular configuration, which would allow earlier dental implant placement.

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Marcia M. A. Romão, Márcia M. Marques, Arthur R. G. Cortes, Anna C. R. T. Horliana, Maria S. Moreira, and Cesar A. Lascala "Effect of laser phototherapy on human alveolar bone repair: micro tomographic and histomorphometrical analysis", Proc. SPIE 9531, Biophotonics South America, 95312N (19 June 2015); https://doi.org/10.1117/12.2181041

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KEYWORDS

Bone

Tissues

Phototherapy

Semiconductor lasers

Statistical analysis

Teeth

Tomography

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