TCS® Techniques

No tooth preparation is necessary when prescribing a tcs® Unbreakable. The unique characteristics of tcs® Unbreakable utilize tissue undercuts and portions of abutment teeth for retention. The laboratory requires only a model that is poured promptly and accurately from a light-weight Polyvinyl material or light-body alginate, and a counter-model.

  • tcs® recommends a light-weight alginate material for impression taking,
  • However, irreversible hydrocolloid, light-weight polyvinyl siloxane and polyether impressions are also suitable.
  • Take a counter-model.
  • Examine the impression for imperfections. If necessary retake impression or have a custom tray made.
  • If using alginate, it is highly recommended to pour up within 30 minutes after taking impression. When using light-weight polyvinyl you can pour up within 24 hrs.
  • tcs® recommends using regular stone with tcs® Unbreakable partials, it is not necessary to use expensive die-stone like other products.
  • Send a bite registration and tooth shade.
  • Try-ins' are recommended for anterior, bilateral free partials, or difficult cases.
  • Ensure that your laboratory uses tcs® Unbreakable.

Teeth try-ins are in wax and are only to examine teeth set-up, not to display the retention of the partial. The set-up will have the clasp area cut off just for the try-in.

  • To ensure that you are receiving a genuine tcs® Unbreakable appliance, be sure your appliance is received in a tcs® branded plastic bag along with a tcs® Unbreakable Patient Education/Dr. Insertion Instruction Pamphlet and that tcs® Unbreakable is indicated on the bill.
  • Examine the partial carefully on and off the master model, make sure the case was properly blocked out by making sure there is no space between the clasp and the tooth.
  • The Hot Water Treatment is very important as it allows for a smooth initial insertion and a good adaptation with your patients natural tissues.
  • Submerge the tcs® Unbreakable restoration in very hot tap water for approximately one minute.
  • When the partials cools to a tolerable temperature, gently insert it into the patients mouth.

Fig.1 -- Fig. 4

  • If the patient senses discomfort due to tightness of the clasp, the clasp may be loosened slightly by submerging that part in hot water for approx 30 seconds, removing it and gently bending the clasp outward while holding it underneath running cold tap water.
  • The clasp can also be tightened by following the same procedure but bending the clasp inward.
  • If further adjustments are needed, they can be made easily with the proper tools and techniques. If patient feels persistent irritation, reduction of the partial may be necessary.
  • There are a variety of burs that are specifically designed for thermoplastic materials. Specifically, the following carbide burs 50C25-01 50C79-01 50G79-01, 50251G-01 and the green mounted point 4501-01.
  • Set your handpiece on a low speed (get speed) and use fast, light scraping back and forth movements to reduce area. Do not keep bur in one spot, be sure to keep it in constant motion. Do not use too much pressure as this may burn or distort the restoration.
  • Do not use the tools that are normally used for conventional removable dentures and partials as they may not work on thermoplastics.

Rubber Wheels or Points are ideal for making small adjustments and/or smoothing after adjustments have been made. Usually the brown rubber wheel/point will leave the case smooth and shiny and it will not be necessary to re-polish. See the following products: Rubber wheels 4503-01, and rubber points 4510-01 and 4511-01.

If there are any threads remaining, these can be removed with a sharp blade, we recommend the tcs® carving knife,4201-01.

  • An alginate impression is taken with the partial in the patient's mouth.
  • Remove the impression from the mouth with the partial in the impression.
  • Be sure the partial is free of any pastes or adhesives.
  • Be sure the partial is fully seated in the impression material.
  • Immediately pour the model with regular yellow stone.
  • Forward to the laboratory with instructions.

When you receive the case from the laboratory, follow the Hot Water Treatment for re-insertion.

In most cases where an overall reline is needed, the case is jumped into a new base.

  • A rubber base impression is taken under the tcs® Unbreakable.
  • The patient closes his/her mouth gently to ensure a correct occlusion as the rubber base is setting.
  • Once the rubber base material has set, an alginate impression is taken and the impression is removed from the mouth with the partial and the rubber base in place.
  • Carefully examine the partial to assure that it is positioned correctly an the alginate material.
  • Immediately pour the model with regular yellow stone.
  • Forward to the laboratory with instructions.
  • DO NOT separate the partial from the stone model.

When you receive the case from the laboratory, follow the Hot Water Treatment for re-insertion.

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