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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >In-vivo evaluation of the contamination of Super Slick elastomeric rings by Streptococcus mutans in orthodontic patients.
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In-vivo evaluation of the contamination of Super Slick elastomeric rings by Streptococcus mutans in orthodontic patients.

机译：正畸患者变形链球菌对Super Slick弹性体环的污染的体内评估。

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INTRODUCTION: We investigated in vivo the contamination by Streptococcus mutans of Super Slick elastomeric rings (TP Orthodontics, LaPorte, Ind), manufactured with Metafasix technology (TP Orthodontics), using microbial culture and scanning electron microscopy (SEM). METHODS: Twenty patients undergoing fixed orthodontic appliance therapy were selected. Super Slick elastomeric rings (n = 160) were tied to brackets on the right maxillary premolars or molars and left mandibular premolars or molars. Conventional elastomeric rings (n = 160) were tied to brackets on the contralateral premolars or molars with the same split-mouth design. After a 15-day intraoral period, 75 elastomeric rings of each type were retrieved, submitted to microbiologic processing, and cultured in bacitracin sucrose broth-selective enrichment broth culture media. The number of S mutans colonies or biofilms on the surface of the electrometric rings was counted by using a stereomicroscope. Data were analyzed statistically with the Wilcoxon nonparametric test at the 5% significance level. Four representative rings of each type were chosen for SEM analysis. RESULTS: Statistical analysis by the Wilcoxon nonparametric test showed that the Super Slick elastomeric rings had statistically significant greater S mutans contamination than the conventional elastomeric rings (P <.0001). No formation of S mutans colonies or biofilms was observed in the elastomeric rings removed directly from their original packages. SEM micrographs showed fissures on the surface of Super Slick elastomeric rings. No fissures were found on conventional elastomeric rings. When the microbiologic culture was positive, S mutans bacterial biofilm was observed on both types of ligatures. CONCLUSIONS: There was no clinical evidence that Super Slick elastomeric rings are effective in reducing bacterial biofilm formation on their surfaces, and a recommendation for their use in orthodontic therapy for that purpose is not justifiable.
机译：简介：我们使用微生物培养和扫描电子显微镜（SEM）在体内调查了变形链球菌对超光滑的弹性环（TP Orthodontics，LaPorte，Ind）的污染，该环是用Metafasix技术（TP Orthodontics）制造的。方法：选择20例接受固定正畸矫治的患者。 Super Slick弹性环（n = 160）绑在右上颌前磨牙或磨牙和左下颌前磨牙或磨牙的支架上。传统的弹性环（n = 160）以相同的开口设计绑在对侧前磨牙或磨牙的支架上。在15天的口内期后，取回每种类型的75​​个弹性体环，进行微生物学处理，并在杆菌肽蔗糖肉汤选择性富集肉汤培养基中培养。通过使用立体显微镜对静电测定环表面上的变形链球菌菌落或生物膜的数目进行计数。使用Wilcoxon非参数检验以5％显着性水平对数据进行统计学分析。选择每种类型的四个代表性环用于SEM分析。结果：Wilcoxon非参数检验的统计分析表明，Super Slick弹性体环比传统弹性体环具有统计学上显着更大的S变异体污染（P <.0001）。在直接从原始包装中取出的弹性环中未观察到变形链球菌菌落或生物膜的形成。 SEM显微照片显示Super Slick弹性体环表面上的裂缝。在常规的弹性环上没有发现裂缝。当微生物培养呈阳性时，两种结扎类型均观察到变形链球菌细菌生物膜。结论：尚无临床证据表明Super Slick弹性体环可有效减少其表面细菌生物膜的形成，因此没有理由建议将其用于正畸治疗。

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