通过比较当代牙锉和传统牙锉分析根面粗糙度和玷污层的关系：一项随机对照试验。
Analysing root roughness and smear layer relationship by comparing contemporary dental curettes with conventional dental curettes: a randomised controlled trial.
机构信息
Department of Periodontology, Baqai Dental College, Baqai Medical University, Karachi, Pakistan.
Department of Operative Dentistry, Dr Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi, Pakistan.
出版信息
BMC Oral Health. 2022 Jun 17;22(1):237. doi: 10.1186/s12903-022-02268-1.
BACKGROUND
Root debridement procedures for the treatment of periodontal diseases, produces root surface irregularities and smear layer on the root surface that can adversely affect the healing of periodontal tissues. The objective of the present study was to evaluate the surface texture of root after hand instrumentation with Gracey curette, After Five curette, and Mini Five curette.
METHODS
A randomised, controlled clinical trial was conducted with 120 participants clinically diagnosed with chronic periodontitis. Participants were equally randomised into four groups, with parallel treatment assignment of scaling and root planning using Gracey Curettes, After five and Mini five curette, and a control group with no instrumentation. Mobile teeth of these patients were then extracted atraumatically and analysed under a Scanning Electron Microscope and graded for "Roughness and Loss of Tooth substance index" and "Smear layer index." Cross Tabulation was made between the test groups (Control, Gracey Curette, After five, and Mini Five) versus "Roughness and Loss of Tooth substance Index" and "Smear Layer Index." A Chi-square test with Bonferroni correction was used to determine the graded distribution among the groups.
RESULTS
In the control group, 73.3% of the teeth showed grade 1 roughness. In the Gracey group, 56.7% showed grade 2 roughness; in the After 5 group, 70% showed grade 3 roughness; in the Mini 5 group, 76.7% showed grade 3 roughness. A significant association was found between roughness scores and the use of individual instruments. Regarding smear layer formation, 46.7% of teeth showed a grade 4 smear layer in the control group. 50% of teeth showed grade 2 smear layer thickness in the Gracey group. In the After 5 group, 73.3% of teeth showed a grade 1 smear layer, while in the Mini 5 group, 80.0% showed a grade 1 smear layer. The use of individual instruments was significantly associated with the smear layer scores.
CONCLUSION
Gracey curettes produced relatively smoother root surfaces with less smear layer formation than After Five and Mini Five curettes, which produced relatively more roughened root surfaces with thicker smear layer formation.
TRIAL REGISTRATION
ID: ClinicalTrials.gov Identifier: NCT04216966 Date of Registration: January 3, 2020.
背景
治疗牙周病的根面清创术会在根面上产生不规则的根面和玷污层，这可能会对牙周组织的愈合产生不利影响。本研究的目的是评价Gracey 刮治器、After Five 刮治器和 Mini Five 刮治器刮治后根面的纹理。
方法
采用随机、对照临床试验，将 120 例临床诊断为慢性牙周炎的患者随机分为 4 组，分别采用 Gracey 刮治器、After Five 和 Mini Five 刮治器进行龈下刮治和根面平整，并设不进行器械操作的对照组。对这些患者的松动牙进行无创性拔除，在扫描电子显微镜下观察并进行“粗糙度和牙体丧失指数”和“玷污层指数”分级。对试验组（对照组、Gracey 刮治器组、After Five 组和 Mini Five 组）与“粗糙度和牙体丧失指数”和“玷污层指数”进行交叉制表。采用卡方检验（Bonferroni 校正）确定组间的分级分布。
结果
在对照组中，73.3%的牙齿表现为 1 级粗糙度。在 Gracey 组中，56.7%表现为 2 级粗糙度；在 After Five 组中，70%表现为 3 级粗糙度；在 Mini Five 组中，76.7%表现为 3 级粗糙度。粗糙度评分与使用的个别器械之间存在显著相关性。关于玷污层形成，对照组中 46.7%的牙齿显示 4 级玷污层；Gracey 组中 50%的牙齿显示 2 级玷污层厚度；After Five 组中，73.3%的牙齿显示 1 级玷污层，而 Mini Five 组中，80.0%的牙齿显示 1 级玷污层。个别器械的使用与玷污层评分显著相关。
结论
与 After Five 和 Mini Five 刮治器相比，Gracey 刮治器产生的根面相对较光滑，玷污层形成较少；而 After Five 和 Mini Five 刮治器产生的根面相对较粗糙，玷污层形成较多。
试验注册
注册号：ClinicalTrials.gov 标识符：NCT04216966 注册日期：2020 年 1 月 3 日。
Zotero 插件