Teflon tape, or PTFE (polytetrafluoroethylene) tape, in dentistry, like this medical grade tape, is a remarkably versatile and indispensable tool. Its cost-effectiveness, biocompatibility, and ease of use make it a game-changer in elevating the predictability of everyday clinical dental procedures. From facilitating gingival retraction and ensuring sealing and isolation to safeguarding adjacent teeth and serving as a lubricant, Teflon tape possesses many applications that can significantly enhance your restorative procedures.

Uses for Teflon Tape in Dentistry

Use Case #1: Deep Margin Elevation

Problem: Achieving a precise margin when using restorative materials for deep margin elevation can be challenging due to the risk of material extrusion into the gingival tissues.

Solution: The "matrix-in-a-matrix" technique is commonly used to seal the gap between the matrix band and the tooth. However, an alternative and equally effective approach is using Teflon tape. This technique dubbed the "Belknap Band" in honor of Dr. William Belknap, entails inserting a two-inch strip of Teflon tape between the matrix band and the adjacent tooth, ensuring a snug seal that maintains the anatomical contour of the margin. This method minimizes the likelihood of poor anatomical form or concavities.

The
Figure 1: The “Belknap Band” uses Teflon tape to seal the gap between the matrix band and the tooth.

Use Case #2: Class II Composite Restorations

Problem: Sectional matrix systems, although designed to provide optimal contour and interproximal contact for Class II composite restorations, can still result in flash and overhangs, particularly when dealing with rotated or malpositioned teeth.

Solution: In cases where a space between the ring and the matrix band is a concern, employing approximately one inch of Teflon tape on both the buccal and lingual aspects of the band ensure a closer, more intimate fit between the matrix band and the tooth. This approach significantly reduces the risk of flash and overhangs, ultimately producing a superior contour for the Class II restoration.

A visual comparison between an early version of a sectional matrix ring and a modern sectional matrix ring.
Figure 2: A visual comparison between an early version of a sectional matrix ring and a modern sectional matrix ring.
A pre-op Class II restoration.
Figure 3: A pre-op Class II restoration.
Teflon tape placed on the buccal and lingual aspects of the band.
Figure 4: Teflon tape placed on the buccal and lingual aspects of the band.
Ring placement. Note the intimate contact between the band and the tooth.
Figure 5: Ring placement. Note the intimate contact between the band and the tooth.
Immediately after removal of the sectional matrix. Note the contour of the restoration and the lack of flash.
Figure 6: Immediately after removal of the sectional matrix. Note the contour of the restoration and the lack of flash.

Summary

The versatile nature of Teflon tape as an invaluable ally in restorative dentistry is undeniable. Its ability to address common challenges in deep margin elevation and Class II composite restorations can substantially elevate the quality and predictability of your clinical dental procedures. Integrating Teflon tape into your practice can improve results and enhance patient satisfaction with improved restorations.

Andy Janiga, D.M.D., practices at the Center for Dental Excellence in Nashua, N.H., and is a contributor to Spear Digest.


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