Mehta Sonal, Virani Hemali, Memon Sarfaraz, Nirmal Narendra
Department of Prosthodontics and Crown and Bridge, Manubhai Patel Dental College and Hospital, Vadodara, Gujarat, India.
Private Practice, Surat, Gujarat, India.
Contemp Clin Dent. 2019 Jul-Sep;10(3):428-432. doi: 10.4103/ccd.ccd_708_18.
The purpose of the study is to evaluate the efficacy of three gingival retraction systems such as polyvinyl siloxane foam retraction system (magic foam cord; Coltene/WhaledentInc), polysiloxane paste retraction system (GingiTrac; Centrix), and aluminum chloride impregnated twisted retraction cord (Stay-Put; Roeko) in endodontically treated teeth.
Patients who were endodontically treated for molars and requiring crown for the same, were selected for the present study with sample size of 45. The 45 participants were divided into three groups. Group 1 was treated with Stay-Put, Group 2 with Magic Foam, and Group 3 with GingiTrac. About 90 elastomeric impressions of the participants were taken-45 impressions before retraction and 45 impressions after retraction. The sulcus width was measured on the die obtained from the elastomeric impressions by placing the dies under OVI-200 optical microscope in combination with X soft imaging system software attached to a computer.
The study indicated 0.465627 mm ± 0.063066 mm of gingival retraction for aluminum chloride impregnated retraction cord, 0.210993 mm ± 0.067358 mm of gingival retraction for GingiTrac paste, and 0.294147 mm ± 0.056697 mm of gingival retraction for magic foam cord.
The study data indicated that the new retraction systems are not as effective as the standard retraction cord; however, of the two new systems the Magic Foam system did prove to be effective enough for clinical use. The GingiTrac system failed to achieve the minimum gingival retraction required and hence may not be suitable for clinical use.
本研究旨在评估三种牙龈收缩系统的疗效，这三种系统分别是聚乙烯基硅氧烷泡沫收缩系统（魔术泡沫线；科尔tene/伟瓦登特公司）、聚硅氧烷糊剂收缩系统（GingiTrac；Centrix）以及浸渍有氯化铝的绞合收缩线（Stay-Put；罗伊科），用于接受过根管治疗的牙齿。
选取因磨牙接受根管治疗且需要为其制作牙冠的患者进行本研究，样本量为45例。45名参与者被分为三组。第1组用Stay-Put治疗，第2组用魔术泡沫治疗，第3组用GingiTrac治疗。对参与者共采集了约90个弹性印模——收缩前45个印模，收缩后45个印模。通过将从弹性印模获得的模型置于OVI - 200光学显微镜下，并结合连接到计算机的X软成像系统软件，测量龈沟宽度。
研究表明，浸渍有氯化铝的收缩线的牙龈收缩量为0.465627毫米±0.063066毫米，GingiTrac糊剂的牙龈收缩量为0.210993毫米±0.067358毫米，魔术泡沫线的牙龈收缩量为0.294147毫米±0.056697毫米。
研究数据表明，新的收缩系统不如标准收缩线有效；然而，在这两种新系统中，魔术泡沫系统确实被证明在临床上有足够的有效性。GingiTrac系统未能达到所需的最小牙龈收缩量，因此可能不适合临床使用。
