Ahmed Sumitha N, Donovan Terry E
Assistant Professor, Department of Operative Dentistry, University of North Carolina, School of Dentistry, Chapel Hill, NC.
Professor and Section Head, Department of Operative Dentistry, University of North Carolina, School of Dentistry, Chapel Hill, NC.
J Prosthet Dent. 2015 Jul;114(1):81-5.e1-2. doi: 10.1016/j.prosdent.2014.11.015. Epub 2015 Apr 24.
A high percentage of fixed prosthodontic restorations require a subgingival margin placement, which requires the practice of gingival displacement or a deflection procedure to replicate the margins in impression.
The purpose of this study was to learn the different gingival displacement techniques that are currently used by dentists in their practice and to compare the current concepts of gingival displacement with previously published articles.
A survey of questions pertaining to gingival deflection methods was distributed as part of continuing education (CE) course material to dentists attending CE meetings in 7 states in the U.S. and 1 Canadian province. Question topics included initial patient assessment procedures, gingival displacement methods, dentist's knowledge and assessment of systemic manifestations, and brand names of materials used.
Ninety-four percent of the participants were general practitioners with 24.11 ± 12.5 years of experience. Ninety-two percent used gingival displacement cords, while 20.2% used a soft tissue laser and 32% used electrosurgery as an adjunct. Sixty percent of the dentists used displacement cords impregnated with a medicament. Of the preimpregnated cords, 29% were impregnated with epinephrine, 13% with aluminum chloride, and 18% with aluminum potassium sulfate.
The study showed a steady decrease compared with results of previously published articles in the use of epinephrine as a gingival deflection medicament.
很大比例的固定义齿修复需要龈下边缘放置，这需要进行牙龈移位或偏移程序以在印模中复制边缘。
本研究的目的是了解牙医在实践中目前使用的不同牙龈移位技术，并将当前的牙龈移位概念与先前发表的文章进行比较。
作为继续教育（CE）课程材料的一部分，向在美国7个州和加拿大1个省参加CE会议的牙医分发了一份关于牙龈偏移方法的调查问卷。问题主题包括初始患者评估程序、牙龈移位方法、牙医对全身表现的了解和评估以及所用材料的品牌名称。
94%的参与者是具有24.11±12.5年经验的全科医生。92%的人使用牙龈移位线，而20.2%的人使用软组织激光，32%的人使用电外科作为辅助手段。60%的牙医使用浸渍药物的移位线。在预浸渍线中，29%浸渍有肾上腺素，13%浸渍有氯化铝，18%浸渍有硫酸铝钾。
与先前发表文章的结果相比，该研究表明作为牙龈偏移药物的肾上腺素的使用呈稳步下降趋势。
