Clinical trial of gingival retraction cords.

Faculty of Dentistry, University of Oslo, Oslo, Norway.
Journal of Prosthetic Dentistry (Impact Factor: 1.72). 03/1999; 81(3):258-61. DOI:10.1016/S0022-3913(99)70266-0
Source: PubMed

ABSTRACT 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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