Moslemi M, Fekrazad R, Tadayon N, Ghorbani M, Torabzadeh H, Shadkar M M
Pediatric Department, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Pediatr Dent. 2009 Sep-Oct;31(5):409-13.
The purpose of this study was to evaluate the effect of the Er,Cr:YSGG loser on the enamel's acid resistance when irradiated alone, prior to or after acidulated phosphate fluoride (APF) treatment.
Eighty-five enamel surfaces were prepared from 17 extracted human premolars and randomly assigned to 5 groups: (1) untreated (control); (2) irradiated with a Er,Cr:YSGG loser; (3) exposed to a 1.23% APF gel; (4) loser-irradiated followed by APF treatment; and (5) APF-treated followed by loser irradiation. The specimens were individually demineralized in 0.2 M acetate buffer solution for 10 days, and the acid resistance was evaluated by determining the calcium ion using atomic absorption spectrometry.
Significant differences were found between group 1 and groups 2 through 5 (P < 0.001). There were no signifIcant differences between groups 2 and 3 (P = 1.000). Compared to groups 2 and 3, a lower calcium content was detected in the demineralization solution for groups 4 and 5. The difference between groups 4 and 5, however, was not statistically significant (P = 0.289).
Combining ocidulated phosphate fluoride with the Er,Cr:YSGG loser decreased the enamel demineralization more than either fluoride treatment or laser treatment alone.
本研究旨在评估铒铬：钇-钪-镓-石榴石激光单独照射、在应用含氟磷酸凝胶（APF）处理之前或之后照射时，对牙釉质耐酸性的影响。
从17颗拔除的人类前磨牙制备85个牙釉质表面，并随机分为5组：（1）未处理（对照组）；（2）用铒铬：钇-钪-镓-石榴石激光照射；（3）暴露于1.23%的APF凝胶；（4）激光照射后进行APF处理；（5）APF处理后进行激光照射。将标本分别在0.2M醋酸缓冲溶液中脱矿10天，并通过原子吸收光谱法测定钙离子来评估耐酸性。
第1组与第2组至第5组之间存在显著差异（P<0.001）。第2组和第3组之间无显著差异（P = 1.000）。与第2组和第3组相比，第4组和第5组的脱矿溶液中检测到的钙含量较低。然而，第4组和第5组之间的差异无统计学意义（P = 0.289）。
与单独进行氟化物处理或激光处理相比，将含氟磷酸凝胶与铒铬：钇-钪-镓-石榴石激光联合使用能更有效地减少牙釉质脱矿。
