The effect of initiator on pulsed Nd:YAG laser in the acid resistance of human teeth in vitro
- VernacularTitle:增效剂对脉冲Nd:YAG激光提高人牙齿抗酸性能的影响
- Author:
Li ZHANG
;
Luchuan LIU
- Publication Type:Journal Article
- Keywords:
Initiator;
Pulsed Nd:YAG laser;
Acid resistance
- From:
Journal of Practical Stomatology
1996;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effect of initiator on pulsed Nd:YAG laser in the acid resistance of human teeth in vitro. Methods:A total of 25 enamel-samples and 25 dentine-samples were divided into laser plus initiator (a layer of Beijing black ink) group and laser only group.Each of the two groups was divided into five subgroups.The samples in the 5 subgroups were irritated by Na:YAG laser with an energy(J/cm2) of 0,20,30,40 and 50 respectively. Then all samples were immersed in 0.1 mol/L lactic acid demineralization solutions(pH 4.5) for 48 h at 37 ℃. The concentration of Ca 2+ (?10 -6 g) dissolved in the solution was measured by the calcium selective electrode. Results:Laser of 20-50 J/cm2 decreased the Ca 2+ concerntration in demineralization solution(P0.05).The initiator plus laser of 30-40 J/cm2 decreased the Ca 2+ release of dentine samples than laser only group (P
