Department of Health, Exercise and Sports Science, Charleston, SC 29409, USA.
J Am Dent Assoc. 2011 Sep;142(9):1041-7. doi: 10.14219/jada.archive.2011.0325.
The authors conducted a study to assess the effects of custom-fitted mouthpieces on gas exchange parameters, including volume of oxygen consumption over time [corrected] (VO(2)), volume of oxygen consumption over time per kilogram of body weight [corrected] (VO(2) /kg) and volume of carbon dioxide production over time [corrected] (VO(2)).
Sixteen physically fit college students aged 18 through 21 years performed two 10-minute treadmill runs (6.5 miles per hour, 0 percent grade) for each of three treatment conditions (mouthpiece, no mouthpiece and nose breathing). The authors assigned the conditions randomly for each participant and for each session. They assessed gas exchange parameters by using a metabolic measurement system.
The authors used analysis of variance to compare all variables. They set the significance level at α = .05 and used a Tukey post hoc analysis of treatment means to identify differences between groups. The results showed significant improvements (P < .05) in VO(2,) VO(2) /kg and VCO(2) in the mouthpiece condition.
The study findings show that use of a custom-fitted mouthpiece resulted in improved specific gas exchange parameters. The authors are pursuing further studies to explain the mechanisms involved in the improved endurance performance exhibited with mouthpiece use.
Dental care professionals have an obligation to understand the increasing research evidence in support of mouthpiece use during exercise and athletic activity and to educate their patients.
作者进行了一项研究，以评估定制口器对气体交换参数的影响，包括随时间变化的耗氧量[校正]（VO ₂ ）、随时间变化的每公斤体重耗氧量[校正]（VO₂/kg）和随时间变化的二氧化碳产生量[校正]（VO₂）。
16 名身体健康的大学生年龄在 18 至 21 岁之间，在三种治疗条件（口器、无口器和鼻呼吸）下各进行两次 10 分钟的跑步机跑步（每小时 6.5 英里，坡度为 0%）。作者为每个参与者和每个会话随机分配条件。他们使用代谢测量系统评估气体交换参数。
作者使用方差分析比较所有变量。他们将显著性水平设定为α=0.05，并使用 Tukey 事后分析处理均值来识别组间差异。结果表明，在口器条件下，VO₂、VO₂/kg 和 VCO₂显著改善（P<0.05）。
研究结果表明，使用定制口器可改善特定的气体交换参数。作者正在进行进一步的研究，以解释口器使用与耐力表现改善相关的机制。
牙科保健专业人员有义务了解越来越多的研究证据，支持在运动和体育活动中使用口器，并教育他们的患者。
