Efficacy of Laser Application in Dental Bleaching: A Randomized Clinical Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 24
- 试验地点
- 2
- 主要终点
- Dental Color Stage 3 (3 days after dental bleaching)
研究概览
简要总结
Objective: To establish the efficacy of laser application with chemical treatment in dental bleaching compared to chemical treatment alone.
Methods: The investigators conducted a randomized controlled trial (RCT), single blind (evaluator), in 24 patients randomized to laser and chemical intervention (12) or chemical intervention aloe (12). The commercial products used were Whiteness Hp 35% Hydrogen Peroxide and the LASER of DCM Equipments. The trial outcome measures were obtained using the Vita EasyShade Spectrophotometer and the International CIELCh system. To stablish differences before vs. after treatments and between groups, the T test and chi2 tests were applied.
详细描述
New technologies continue to be launched in the field of dental esthetics, especially for whitening, and many products advertise their efficacy. One new approach is the use of LASER technology which has been purported to be the most powerful font light for bleaching Diverse studies by different designs find different efficacies for LASER whitening Randomized clinical trials (RCT) are needed for the most rigorous confirmation of efficacy. RCT are able to control for characteristics that can cause bias, including factors related to dental care such as diet and cleaning behavior after the bleaching procedure. The investigators therefore conducted an RCT to make a side by side comparison of a LASER whitening technique with chemical bleaching versus chemical bleaching without LASER.
Intervention: After the patient was informed and sign the consent; a dental prophylaxis was done. Three days later the bleaching procedure started following the same protocol regarding to the time and product used (35% Hydrogen Peroxide Whitening HP, 40 minutes divided in two phases of 20 minutes each one) from premolar to premolar in superior and inferior teeth. The difference was that one of the intervention groups used the Laser for ten minutes (starting at the minute 5) and the other did not.. The Laser used was the Whitening Lase II (DCM EQUIPMENTS).
The measure of the color was done to the superior canines by just one evaluator in three stages: before bleaching (baseline), 15 minutes after bleaching, and three days after. It was done with the Vita Easyshade Spectrophotometer.
The dental sensitivity also was asked at the three time points; however, as an exclusion criterion the level had to be 0 to be entered into the study.
All the patients received verbal and written instructions about eating and cleaning behavior. Cleaning materials for the three days after procedure were given.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
盲法说明
It was single blind; as the evaluator did not know what intervention the patient was assigned.
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patients who wanted to bleach or whiten their teeth.
排除标准
- •Patients who have a color less than A2 according to the Vita Scale
- •Patients with dental sensitivity
- •caries or restorations
- •periodontal disease
- •dental abfraction or attrition
- •pregnant women, smokers
- •patients with orthodontics
- •nauseous reflects
- •patients who did not wish to sign the consent.
研究组 & 干预措施
Laser Application
35% Hydrogen Peroxide (Whitening HP, FGM SC Brazil) 40 minutes divided in two phases of 20 minutes each one (5 minutes colocation, 10 minutes Laser Application and 5 minutes moving the product) from premolar to premolar in superior and inferior teeth. Experimental
干预措施: Laser Application for Dental Bleaching (Device)
No Laser Application
35% Hydrogen Peroxide (Whitening HP FGM SC Brazil), 40 minutes divided in two phases of 20 minutes each one (5 minutes colocation, 10 minutes waiting and 5 minutes moving the product) from premolar to premolar in superior and inferior teeth. No Laser Application No Intervention
结局指标
主要结局
Dental Color Stage 3 (3 days after dental bleaching)
时间窗: through study completion, an average of 3 days
The measure of the color was done to the superior canines by just one evaluator. It was done with the Vita Easyshade Spectrophotometer. To improve precision off the data, measures were taken 3 times in all superior canines studied. The Investigators used the values L, C,H.
Dental Color Stage 2 (30 minutes after dental bleaching)
时间窗: through study completion, an average of 3 days
The measure of the color was done to the superior canines by just one evaluator. It was done with the Vita Easyshade Spectrophotometer. To improve precision off the data, measures were taken 3 times in all superior canines studied. The Investigators used the values L, C,H.
Change in Color (Stage 2 - Stage 1)
时间窗: through study completion, an average of 3 days
The difference in color was calculated using the international accepted system CIELCh (11,18-19). The formula is ∆E\* = \[(∆L\*)2 + (∆C\*)2 + (∆h\*)2\] ½; were L is Luminosity, C is Chroma and h is Hue. The higher difference in color will show the better intervention.
Dental Color Stage 1(Before Intervention)
时间窗: through study completion, an average of 3 days
The measure of the color was done to the superior canines by just one evaluator. It was done with the Vita Easyshade Spectrophotometer. To improve precision off the data, measures were taken 3 times in all superior canines studied. The Investigators used the values L, C,H.
Change in Color (Stage 3 - Stage 1)
时间窗: through study completion, an average of 3 days
The difference in color was calculated using the international accepted system CIELCh (11,18-19). The formula is ∆E\* = \[(∆L\*)2 + (∆C\*)2 + (∆h\*)2\] ½; were L is Luminosity, C is Chroma and h is Hue. The higher difference in color will show the better intervention.
次要结局
- Immediate Dental Sensitivity(through study completion, an average of 3 days)
- Mediate Dental Sensitivity(through study completion, an average of 3 days)
研究者
Julieta María Méndez Romero
Doctor in Dental Surgery, Professor of Research Methodology
Universidad Nacional de Caaguazu