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Effect of low level laser therapy on dental pulp during orthodontic movement

World Journal of Methodology 2013年第2期3卷 19-26页

作者： ngela Domínguez Rosa Emilia Ballesteros Jairo Hernán Viáfara Oscar Mario Tamayo Department of orthodontics Faculty of DentistryUniversidad del ValleCali 76001000Colombia Histology and Anatomy Medicine DepartmentUniversidad Santiago de CaliCali 76001000Colombia

AIM: To validate the protocol described here to be used in future clinical trials related to the effect of laser therapy on dental pulp. METHODS: Histologically treated samples from eight human healthy premolar teeth obtained from the middle root level were distributed in four groups: group 1(G1) absolute control; group 2(G2) only laser irradiation; group 3(G3) exposed only to orthodontics; and group 4(G4) treated with orthodontics and laser. Laser treatment was performed at 830 nm wavelength, 100 mW(energy 80 J/cm2, 2.2 J), for 22 s in the vestibular surface and 22 s in the palatal surface, 1 mm away from the dental root mucosa. Three staining methods were performed: hematoxylin-eosin(HE), Masson's Trichrome method and Gomori's ***: The pulp histology parameters were evaluated and the results classified in to 3 parts: an inflammatory response, soft tissue response(dental pulp) and hard tissue response(dentin and predentin). There was no inflammation(chronic or acute) in any of the evaluated groups. The zones of pulp necrosis were found in one premolar of G3 and in one of G4; in groups G2 and G4 there was higher angiogenesis than in the other two groups. G4 group presented the highest level of vascularization. A reduced nerve density was observed in G3. A G2 specimen showed increased nerve density. A higher rate of calcification was observed in G1 compared to G2. Denticles, either real or false, were observed in G1, G2 and G3. Sclerosis of dentin and focal dentin loss was observed among all the groups. Secondary dentin was present in one sample in G1 and G2. A necrosis zone was found in one sample of G3 and G4. No differences between groups were observed in the odontoblast irregularity layer but the layer was wider in the group treated with laser only. A notable difference was detected in reduction of the cell-free layer between the groups G1 and G4. The findings in pulp tissue favor its adaptative response against dental movement induced by orthodontics.

关键词： Low level laser therapy Pulpal orthodontic movement Histological protocol Dentin

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Is it possible to anchor a tooth with photobiomodulation?

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World Journal of Clinical Cases 2024年第5期12卷 872-874页

作者： Angela Dominguez Department of orthodontics Faculty of DentistryBenemerita Universidad Autónoma de PueblaZaragoza de Puebla Calle 4 Sur 104PueblaMexico

During orthodontic treatment,we can achieve differential movements by using photobiomodulation(PBM)as an adjuvant before applying *** can expect a greater bone density that initially resists movement while applying PBM to the other teeth to achieve an accelerating *** proposed protocol is to use an 810 nm laser at 0.1W power,applying between 4 and 6J per tooth for 22 s on the vestibular and lingual root surfaces,following the axial axis of the *** energy density depends on the tip selected in the *** bone remodeling cannot be avoided by applying high doses of *** should be applied before orthodontic force to reduce tooth *** addition,PBM can be used during force application to teeth that require acceleration to achieve differential movement in orthodontic *** protocol is the same in both scenarios.

关键词： Photobiomodulation orthodontic movement Diode laser PBM Anchorage in orthodontics

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