Johnson K E, Sanders J J, Gellin R G, Palesch Y Y
Department of Stomatology, College of Dental Medicine, Medical University of South Carolina, Charleston 29425-2663, USA.
J Clin Periodontol. 1998 Apr;25(4):316-21. doi: 10.1111/j.1600-051x.1998.tb02447.x.
The purpose of this study was to evaluate the effects of a magnetized water oral irrigator on plaque, calculus and gingival health. 29 patients completed this double-blind crossover study. Each patient was brought to baseline via an oral prophylaxis with a plaque index < or = 1 and a gingival index < or = 1. Subjects used the irrigator for a period of 3 months with the magnet and 3 months without the magnet. After each 3 month interval, data were collected using the plaque index, gingival index, and accretions index. The repeated measures analysis on plaque, gingival and calculus indices yielded a statistically-significant period effect for PlI (p=0.0343), GI (p=0.0091), and approached significance for calculus (p=0.0593). This meant that the effect of irrigation resulted in a decrease of all indices over time. Therefore, the treatment effect on each index was evaluated using only the measurements obtained at the end of the first period (i.e., assuming a parallel design). Irrigation with magnetized water resulted in 64% less calculus compared to the control group. The reduction was statistically significant (p< or =0.02). The reduction by 27% in gingival index was not statistically significant. The reduction in plaque was minimal (2.2%). A strong positive correlation between the plaque index and the Watt accretion index was observed. The magnetized water oral irrigator could be a useful adjunct in the prevention of calculus accumulation in periodontal patients, but appears to have minimal effect on plaque reduction. The results indicated a clinical improvement in the gingival index, but this was not a statistically significant finding.
本研究的目的是评估磁化水口腔冲洗器对牙菌斑、牙结石和牙龈健康的影响。29名患者完成了这项双盲交叉研究。每位患者通过口腔预防措施达到基线水平，菌斑指数≤1且牙龈指数≤1。受试者使用冲洗器3个月，其中1个月有磁体，3个月无磁体。在每个3个月的间隔期后，使用菌斑指数、牙龈指数和附着指数收集数据。对菌斑、牙龈和牙结石指数的重复测量分析显示，菌斑指数（p = 0.0343）、牙龈指数（p = 0.0091）有统计学意义的时期效应，牙结石指数接近显著水平（p = 0.0593）。这意味着随着时间的推移，冲洗的效果导致所有指数下降。因此，仅使用在第一个时期结束时获得的测量值来评估对每个指数的治疗效果（即假设为平行设计）。与对照组相比，用磁化水冲洗导致牙结石减少64%。这种减少具有统计学意义（p≤0.02）。牙龈指数降低27%无统计学意义。菌斑减少最小（2.2%）。观察到菌斑指数与瓦特附着指数之间有很强的正相关性。磁化水口腔冲洗器可能是预防牙周病患者牙结石堆积的有用辅助工具，但似乎对减少菌斑的效果最小。结果表明牙龈指数有临床改善，但这不是一个有统计学意义的发现。
