Description
Universal Tofflemire Type Retainer
Dental Instruments
SMS Instrument universal retainer is also referred the tofflemire retainer. This device hold the matrix band in position. The retainer is positioned most commonly from the buccal surface of the tooth being restored. This is most recent development and is usually preferred for most amalgam restoration.
Parts of Universal Retainer
Outer Knob
Used to tighten and loosen the spindle within the diagonal slot: this holds the matrix band securely in the retainer.
Inner knob
Use to increase and decrease the size of the matrix band loop; when placing the band over the tooth, the size of the loop circumference should be the largest size and then tightened after placement.
Spindle
Internal screw like pin that fits into the diagonal slot to secure the end of the matrix band; when assembling the retainer, the spindle point must be clear of the slot into which the band slides.
Diagonal Slot
Slot within the main body of the retainer that is used to position the end of the matrix band into the vise, the retainer is always positioned in the mouth with this slot facing toward the gingiva
Guide Slot
Slot used to position the matrix band for either the left or the right quadrant.
Surname | Â Universal Tofflemire Retainer |
curvature | Straight |
Finishing | Mirror Polish Finishing |
Instrument Type | Dental Matrix Retainer |
Material | Stainless Steel |
Disposable or Reusable | Reusable |
Rusting Prevention | Passivation Processed |
Cleaning | Ultrasonic Cleaned |
Sterile or Non-Sterile | Non-Sterile |
Latex or Latex-Free | Latex-Free |
Test Performed | Boil, Shape & Performance Test |
Grade | Premium OR-Grade |
Packing | Individually Packed in SMS Brand printed Poly-sleeve |
Matrix Retainer
A Dental Matrix Retainer is mechanical used to secure the ends of a matrix band around a tooth. The band provides a substitute wall where a part of the tooth is missing and helps to compact a restoration into a prepared tooth cavity after the carious lesion has been removed. Usually by engaging the ends of the matrix band and drawing the band tight. When a restoration involves an interproximal surface, it is not possible to achieve a properly adapted restoration without a matrix band. A matrix band creates a temporary interproximal surface, and, when appropriate, a matrix retainer secures the matrix band in place.
Function of matrix
- To confine restorative material while it is hardening.
- To established optimal contacts and contours for the restoration.
- To prevent gingival overhangs off restoration.
- To provide acceptable surface texture for restoration.