Centre for Orthodontics and Pediatric Dentistry, Linköping & Norrköping, County Council of Östergötland, Sweden.
Acta Odontol Scand. 2013 May-Jul;71(3-4):610-5. doi: 10.3109/00016357.2012.700064. Epub 2012 Aug 17.
The aim was to evaluate the effect on cavity preparation time, the pulse changes and the patient's subjective experience during removal of healthy tooth substance with high-speed bur and Er:YAG laser.
Thirty-five (13 male, 22 female) 14-18-year-olds participated. After local anaesthesia, Er:YAG laser and high-speed diamond bur were used for a 2 mm deep cavity preparation on the middle of the buccal surface on contra-lateral healthy maxillary first premolars. The cavity preparation time and the pulse were measured during the treatment. Subjective experience was evaluated using a VAS-scale and a questionnaire. Wilcoxon Signed Rank test and Chi-2-test were used for statistical analyses.
The mean (SD) cavity preparation time was 3.7-times longer (p < 0.001) for the laser [59 (41) s] than for the high-speed bur [16 (4) s]. The mean pulse change during preparation differed (p < 0.05) between the bur (+2.2%) and laser (-4.4%). The smell was worse when laser was used (p < 0.01); 65.7% expressed less discomfort and 57.1% experienced a lower sound level when laser was used. Laser was preferred for future treatment in 62.9% of the adolescents.
Laser ablation caused unpleasant smell and longer cavity preparation time, but was preferred by a majority of the adolescents.
评估高速涡轮钻和 Er:YAG 激光去除健康牙体组织对窝洞制备时间、脉冲变化和患者主观感受的影响。
35 名（13 名男性，22 名女性）14-18 岁的参与者。局部麻醉后，使用 Er:YAG 激光和高速金刚石钻在对侧健康上颌第一前磨牙颊面中央进行 2mm 深的窝洞制备。在治疗过程中测量窝洞制备时间和脉冲。使用视觉模拟评分（VAS）和问卷评估主观体验。采用 Wilcoxon 符号秩检验和卡方检验进行统计学分析。
激光组的平均（标准差）窝洞制备时间比高速涡轮钻组长 3.7 倍（p<0.001）[59（41）s 比 16（4）s]。在制备过程中，钻头组的脉冲变化平均值（p<0.05）为+2.2%，而激光组为-4.4%。激光组的气味更差（p<0.01）；65.7%的人表示使用激光时不适感较低，57.1%的人表示声音水平较低。62.9%的青少年表示更愿意在未来的治疗中使用激光。
激光烧蚀会产生不愉快的气味和更长的窝洞制备时间，但大多数青少年更喜欢激光。
