Qureshi Siddique Mohammed, Anasane Nayana Shriram, Kakade Dilip
Department of Prosthodontics and Crown and Bridge, Dr. D. Y. Patil Dental College and Hospital, Dr. D. Y. Patil Vidyapeeth, Pimpri, Pune, Maharashtra, India.
Contemp Clin Dent. 2020 Jan-Mar;11(1):28-33. doi: 10.4103/ccd.ccd_311_19. Epub 2020 Jul 13.
Gingival retraction cord is the most commonly used gingival displacement material; however, it causes discomfort and produces damage to the periodontium. Various new gingival retraction materials have been introduced to overcome these problems. This study was conducted to compare the efficacy of three recent gingival displacement materials in achieving gingival tissue displacement.
A total of 10 subjects was selected and 40 samples were made for the study. Samples were divided into four groups depending on the materials used for gingival displacement. The schedule for gingival displacement and impression making followed Latin block design. On day 1, baseline impression was made without gingival displacement. On day 2, day 22, and day 42 impressions were made after gingival displacement on intact maxillary right central incisor with any one of the three agents. The amount of gingival displacement was then measured as a distance from the tooth to the crest of the gingiva in a horizontal plane using stereomicroscope.
Statistical analysis was performed using one-way ANOVA test. The amount of gingival displacement obtained by all the experimental groups was more than the control group ( < 0.01). Among the experimental groups, astringent gingival retraction paste showed the highest value for gingival displacement (0.50 mm) followed by the stay-put retraction cord (0.48 mm), whereas expasyl (0.34 mm) showed the least value.
Within the limitations of this study, astringent gingival retraction paste showed the highest value for gingival displacement followed by stay-put retraction cord whereas, expasyl showed the least value.
牙龈收缩线是最常用的牙龈移位材料；然而，它会引起不适并对牙周组织造成损害。为克服这些问题，已引入了各种新型牙龈收缩材料。本研究旨在比较三种新型牙龈移位材料在实现牙龈组织移位方面的效果。
共选取10名受试者，制作40个样本用于研究。根据用于牙龈移位的材料将样本分为四组。牙龈移位和制取印模的方案遵循拉丁方设计。第1天，在未进行牙龈移位的情况下制取基线印模。第2天、第22天和第42天，使用三种材料中的任何一种对完整的上颌右侧中切牙进行牙龈移位后制取印模。然后使用体视显微镜在水平面上测量牙龈移位的量，即从牙齿到牙龈嵴的距离。
采用单因素方差分析进行统计分析。所有实验组获得的牙龈移位量均大于对照组（<0.01）。在实验组中，收敛性牙龈收缩糊剂的牙龈移位值最高（0.50mm），其次是固定收缩线（0.48mm），而Expasyl（0.34mm）的值最低。
在本研究的局限性内，收敛性牙龈收缩糊剂的牙龈移位值最高，其次是固定收缩线，而Expasyl的值最低。
