Clinical trial of gingival retraction cords

Faculty of Dentistry, University of Oslo, Oslo, Norway.
Journal of Prosthetic Dentistry (Impact Factor: 1.75). 03/1999; 81(3):258-61. DOI: 10.1016/S0022-3913(99)70266-0
Source: PubMed


A wide spectrum of different gingival retraction cords is used, while the relative clinical efficacy of these cords remains undocumented.
This study aimed to determine whether clinicians were able to identify differences in clinical performance among 3 types of gingival retraction cords.
Dental students and faculty members ranked pairs or series of cords according to 6 criteria for clinical performance, with a blind experimental study design. Cords differed in consistency (knitted or twined) and impregnation (8% dl-epinephrine HCl, 0.5 mg/in or 25% aluminum sulfate, 0.5 mg/in).
Knitted cords were ranked better than twined cords (P =.03). Cords containing epinephrine performed no better clinically than aluminum sulfate cords (P >.05).
Clinicians were unable to detect any clinical advantages of using epinephrine impregnated gingival retraction cords compared with aluminum sulfate cords.

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Available from: Asbjørn Jokstad, Mar 04, 2014
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    • "Vasoconstrictors like epinephrine do not coagulate, but act by constricting blood vessels and decreasing their size. There have been concerns, however, over the use of racemic epinephrine-impregnated cords due to elevation of blood pressure and increase in heart rate[1111421] and no benefits have been recognized over other non-impregnated cords.[22] Astringents, such as alum or aluminum potassium sulfate (KAl (SO4)2), AlCl3 and zinc chloride (ZnCl2), are substances that act by precipitating proteins on the superficial layer of mucosa and make it mechanically stronger. "
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