Ultradent Ultrapak Cord


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  • The original—and smallest—knitted cord
  • Provides rapid tissue displacement, detailed margins, and quality impressions
  • Facilitates easy packing and stays placed better than any twisted or braided cord
  • Compresses upon packing then expands for optimal retraction
  • Does not entangle in diamond bur
  • Bright colors facilitate easy location and removal
  • Available with or without epinephrine*​
  • High carbon steel blade ensures a clean cut
  • Thin plastic gate prevents the cord from falling into the bottle upon cutting
  • Ruler printed on the label provides easy cord measurement​


Ultrapak cord is made of 100% cotton, knitted into thousands of tiny loops to form long, interlocking chains. This unique knitted design exerts a gentle, continuous outward force following placement, as the knitted loops seek to open. Optimal tissue displacement occurs in 3–8 minutes.


  • #0 (purple and white) – Substitute for black silk suture as lower cord in the “two-cord” technique; lower anteriors; when luting near gingival margin (class III, IV, and V restorations)
  • #00 (black and yellow) – Substitute for black silk suture as lower cord in the “two-cord” technique; preparing and cementing veneers; restorative procedures dealing with thin, friable tissues
  • #000 (black and purple) – Substitute for black silk suture as lower cord in the “two-cord” technique for anterior teeth with thin, friable tissues


How long should the cord be left in the sulcus?

In most cases, the knitted loops of the cord provide optimal retraction after 3–8 minutes.

What length of cord should I use?

The length of cord will depend on the circumference of the preparation. Ultrapak’s bottle features a handy ruler on the side to help make sure you get the right length.

How will I know if the retraction is adequate?

Retraction is adequate when the margins of the gingiva are pulled away from the preparation and the cord can be removed without the gingiva hemorrhaging. To help prevent the onset of bleeding upon removal, soak the cord in an astringent like Astringedent or ViscoStat.

Are there times when I shouldn’t use cord impregnated with epinephrine?

Yes. Cord impregnated with epinephrine should not be used on patients with cardiovascular disease, hyperthyroidism, hypertension, diabetes, arteriosclerosis, or on patients taking tricyclic antidepressants or having sensitivity or hypersensitivity to epinephrine. In addition, elderly individuals, pregnant women, and children under 66 lbs. may be at greater risk of developing adverse reactions after epinephrine administration.Do not use epinephrine cord with ferric sulfate hemostatics like ViscoStat or Astringedent, as a temporary blue/black precipitate will occur.

What is the benefit of the knitted cord over braided cord?

Braided cords are more rigid than knitted cords, which can cause an issue when packing into the sulcus. With rigid braided cords, when one portion of the cord is packed into the sulcus, another portion of the cord is typically raised. Knitted cords are more flexible and pack easily into the sulcus.