GINGIVAL RETRACTION CORD EBOOK DOWNLOAD!
Hemodent Gingival Retraction Cord is made of cotton and impregnated with astrinigent, a buffered solution of 10 percent aluminum chloride. Hemodent cord is. The main difference among the techniques is the trauma caused in the gingival tissue. While the surgical techniques are the most aggressive, the cordless retraction techniques caused little trauma to gingival tissue than the technique employing the retraction cord [6,7]. RETRACTION CORDS % cotton Retract the gingiva (impression) Haemostasis (when soaked in a solution); 7. RETRACTION.
|Author:||Dr. Marcelino Tromp|
|Published:||14 February 2014|
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One of the most challenging aspects of crown and bridge treatment is the management of the gingival gingival retraction cord prior to impression making.
The management includes placing the gingival tissues away from the prepared tooth margins so that they can be impressed, combined with providing for hemostasis when the gingival tissues might bleed. Whether or not the impression is made conventionally with impression material or with a digital impression technique, all the tooth margins need to be captured to assure an gingival retraction cord marginal fit of a lab fabricated restoration.
7 Steps to Using Retraction Cord When Making an Impression - Spear Education
There are many techniques to achieve retraction, gingival retraction cord retraction cords, chemical reagents, electrosurgery, laser tissue sculpting and hemostatic materials that displace tissue atraumatically.
In most cases, gingival retraction cord is the most effective and most commonly used method. Controlling the soft tissue, managing any bleeding and exposing the margins is what is most critical.
That is why the clinician needs to understand all the choices available. Mechanical displacement of the gingival tissues aside from the tooth prep margins allow us visualization and access, and we do this best with retraction cords.
A survey of prosthodontists in showed that 98 percent gingival retraction cord those who responded used gingival retraction cord cord and half of them used the double cord technique.
Back then, plain cord was the most commonly used cord followed by aluminum chloride-impregnated cord. Braided versus Knitted Braided cords have a tight and consistent weave. For many clinicians, these are easier to place in the sulcus with packing instruments serrated gingival retraction cord non-serrated.
Since they expand when wet, knitted cords will open the sulcus greater than the original diameter of the cord. With either braided or knitted there is a variety of diameters and sizes to allow for ease of placement in tighter and healthier gingival sulcuses.
Ultimately, it is a personal preference. One study published in the showed that knitted gingival retraction cord were preferred over braided and there was no advantage to cords impregnated with epinephrine. Either way, when handling retraction cord it is important to remember to use latex free gloves because contamination of the cord with latex can have a deleterious effect on the setting of the VPS impression materials.
This is important when a light body material is placed first into the sulcus. If it does not cure completely, it can result in inaccuracies or tearing of the fine gingival margin within the impression. Cord Packing Instruments The end of the cord packer needs to be thin enough to be placed in the gingival sulcus gingival retraction cord damaging the tissue and causing any bleeding.
The angulation of gingival retraction cord instrument will help in the orientation for the placement.
Design of the instrument is limited to the manufacturer, but many dentists utilize two different instruments depending on the tooth location.
Thin, flat instruments for anterior tissue which tends to be thinner and tighter works quite well, and gingival retraction cord serrated or non-serrated work better for posterior teeth. These agents will initially cause a transient ischemia shrinking the gingival tissue.
These compounds include aluminum potassium sulfate, aluminum sulfate, percent aluminum chloride, We do know that chemically impregnated gingival retraction cord offer better sulcus displacement as you have both a mechanical and chemical effect. When used for durations of less than 10 minutes, they cause minimal tissue damage.
These chemicals can interfere with the surface detail of the impression material and with the dentin surface, so thoroughly cleaning the dentin before using a resin bonded cement is recommended.