B R Chand1, S Kulkarni2, P Mishra3. 1. Department of Pedodontics and Preventive Dentistry, Sri Aurobindo College of Dentistry, Indore, India. drbintichand@gmail.com. 2. Department of Pedodontics and Preventive Dentistry, Sri Aurobindo College of Dentistry, Indore, India. drsadanandkulkarni@hotmail.com. 3. Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore, India. drprashantmishra@hotmail.com.
Abstract
AIM: This in vitro study was to evaluate the irradiation efficacy of the Diode laser and the Nd-YAG laser either un-assisted or assisted by acidulated phosphate fluoride (APF) treatment on enamel's acid resistance. METHODS:Seventy-two enamel samples, obtained from 12 extracted human molars, were randomly assigned to 6 groups as follows: (1) Control (C); (2) Exposed to APF gel (F); (3) Diode laser (DL); (4) Irradiated with Diode laser through APF gel (DL/F); (5) Nd-YAG laser (NL) and (6) Irradiated with Nd-YAG laser through APF gel (NL/F). The specimens were individually demineralised in an acidified hydroxyethylcellulose system, and the acid resistance was evaluated by determining the calcium ion dissolution using atomic absorption spectrometry. RESULTS: The average concentration of the calcium ion determined in groups 1 to 6 was 901, 757, 736, 592, 497 and 416 parts per million micrograms/gram, respectively. The results showed that demineralisation in the NL/F group was significantly less than the other groups and the control group was significantly greater than the other groups (P < 0.001). CONCLUSION: The effect of Nd-YAG laser irradiation, used alone or in combination with APF, in decreasing the enamel demineralisation was greater than all the other groups.
RCT Entities:
AIM: This in vitro study was to evaluate the irradiation efficacy of the Diode laser and the Nd-YAG laser either un-assisted or assisted by acidulated phosphate fluoride (APF) treatment on enamel's acid resistance. METHODS: Seventy-two enamel samples, obtained from 12 extracted human molars, were randomly assigned to 6 groups as follows: (1) Control (C); (2) Exposed to APF gel (F); (3) Diode laser (DL); (4) Irradiated with Diode laser through APF gel (DL/F); (5) Nd-YAG laser (NL) and (6) Irradiated with Nd-YAG laser through APF gel (NL/F). The specimens were individually demineralised in an acidified hydroxyethylcellulose system, and the acid resistance was evaluated by determining the calcium ion dissolution using atomic absorption spectrometry. RESULTS: The average concentration of the calcium ion determined in groups 1 to 6 was 901, 757, 736, 592, 497 and 416 parts per million micrograms/gram, respectively. The results showed that demineralisation in the NL/F group was significantly less than the other groups and the control group was significantly greater than the other groups (P < 0.001). CONCLUSION: The effect of Nd-YAG laser irradiation, used alone or in combination with APF, in decreasing the enamel demineralisation was greater than all the other groups.
Authors: Alberto González-Rodríguez; Juan de Dios López-González; Juan de Dios Luna del Castillo; Juan Villalba-Moreno Journal: Lasers Med Sci Date: 2010-04-27 Impact factor: 3.161
Authors: Denise Maria Zezell; Heloisa Gomes D Boari; Patricia Aparecida Ana; Carlos de Paula Eduardo; Glen Lynn Powell Journal: Lasers Surg Med Date: 2009-01 Impact factor: 4.025