Westerman Gary H, Hicks M John, Flaitz Catherine, Powell G Lynn
Department of Community and Preventive Dentistry, Creighton University, Omaha, NE, USA.
Am J Dent. 2004 Dec;17(6):383-7.
To evaluate argon laser irradiation (AL), light-emitting diode exposure (LED), and acidulated phosphate fluoride treatment (APF) in vitro effects on caries-like enamel caries formation.
Sound teeth (n = 18) were divided into four tooth quarters and coated with an acid-resistant varnish, leaving an enamel window exposed per tooth quarter. The tooth quarters were assigned to: (1) no treatment (control, mesiobuccal); (2) 1.23% APF (4 minutes, distolingual); (3) LED (Ultradent Ultra-Lume LED2 20 seconds, mesiolingual); and (4) AL (HGM Model 8, 11.5 J/cm2, 231 mW, 5mm beam size, 10 seconds, distobuccal). Following caries-like lesion formation (modified ten Cate solution), longitudinal sections (three per tooth quarter, 54 lesions per group) were obtained and evaluated for mean lesion depths (water imbibition, polarized light microscopy, ANOVA, DMR).
Mean lesion depths were: 198 +/- 21 microm for controls; 186 +/- 17 microm for LED; 117 +/- 19 microm for AL; and 104 +/- 23 microm for APF. Lesion depths were statistically significantly decreased for AL (41%) and APF (47%) groups (P < 0.05), compared with controls. A slight lesion depth reduction for LED (6%) was present compared with controls; however this was not statistically significantly different (P > 0.05).
评估氩激光照射（AL）、发光二极管照射（LED）和酸化磷酸氟处理（APF）对体外模拟龋损样釉质龋形成的影响。
选取健康牙齿（n = 18），将每颗牙齿分为四个牙面区域，并涂覆耐酸清漆，每个牙面区域保留一个釉质窗口暴露。这些牙面区域被分配到：（1）不做处理（对照组，近中颊侧）；（2）1.23% APF（4分钟，远中舌侧）；（3）LED（Ultradent Ultra-Lume LED2，20秒，近中舌侧）；（4）AL（HGM Model 8，11.5 J/cm²，231 mW，5mm光束尺寸，10秒，远中颊侧）。在形成龋损样病变后（改良ten Cate溶液），获取纵剖面（每个牙面区域三个，每组54个病变），并通过吸水法、偏光显微镜、方差分析和数字显微镜反射（DMR）评估平均病变深度。
对照组的平均病变深度为198±21微米；LED组为186±17微米；AL组为117±19微米；APF组为104±23微米。与对照组相比，AL组（41%）和APF组（47%）的病变深度在统计学上显著降低（P < 0.05）。与对照组相比，LED组的病变深度略有降低（6%）；然而，这在统计学上没有显著差异（P > 0.05）。
