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

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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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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    • "Its aqueous solution is highly acidic reaching a pH the durability of the restoration due to micro leakage of 1.0. It is mainly used as a decalcifier and fixative in (Jokstad, 1999; Iovan et al., 2004; Spahr et al., 2000; microscopy and as a precipitant of proteins. In medicine, Saayman et al., 2005). "
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    ABSTRACT: Neðst á síðunni er hægt að nálgast greinina í heild sinni með því að smella á hlekkinn Skoða/Opna(view/open) Krónur, skeljar, innlegg og álegg (onlay) eru reglulega notuð í tannlækningum til að byggja upp skemmdar tennur og/eða til að bæta útlit. Þegar tannskurðarbrúnir eru staðsettar subgingivalt er nauðsynlegt að ýta tannholdinu tímabundið til hliðar (gingival retraction) þannig að þær verði aðgengilegar við máttöku. Áratugum saman snerust rannsóknir í munn-og tanngervalækningum aðallega um tæknilegar útfærslur og hvaða efni skyldu notuð. Það var fyrst í lok fimmta og á sjötta áratug síðustu aldar sem áhrif efna og aðferða á tannhold fékk aukið vægi í rannsóknum.
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