The Lingual Matrix Technique
By Bob Margeas, DDS
From the one-shade to the more complex Class IV requiring layering of opacities, the simple fabrication of a lingual matrix can greatly simplify your technique while minimizing finishing time. The lingual matrix establishes optimal incisal length and lingual contour, enabling more accurate placement of subsequent layers. This accuracy translates into procedural efficiency and a more predictable restorative outcome.
Using the existing restoration, or, if necessary, mock-up a restoration using some unwanted or seldom-used composite, keeping in mind that only the incisal edge and lingual contour and contacts need to be accurately established. Once the mock-up is cured, apply a thick layer of Template™ Matrix Material (Clinician’s Choice®) to the lingual of all six anterior teeth, ensuring that the material doesn’t extend beyond the facio-incisal line angle (Step 1).
After 30-45 seconds, the Template lingual matrix is set and can be removed. The mock-up is broken away, the matrix is replaced, and
a line corresponding to the fracture is scribed onto its inner surface. A very thin, uniform layer of Evanesce™ Enamel FX White composite is placed up to the scribed line (Step 2). The matrix is placed back onto the teeth and this lingual layer is attached to the etched and bonded tooth and light cured (Step 3). Controlled placement of subsequent layers of Evanesce can now be carried out without the lingual matrix in place (Step 4).
This fast and simple step of creating a lingual matrix with Template Matrix Material makes the complicated layered placement of a Class IV composite easier, more predictable and efficient (Step 5).
Join the Hands-OnLine LIVE™ course, Mastering the Class IV Restoration, and complete this technique under the live direction of Dr. Bob Margeas. See handsonlinelive.com or next page for course schedule and to register.
ABOUT THE AUTHOR
Dr. Margeas graduated from the University of Iowa College of Dentistry in 1986 and completed his AEGD residency the following year. He is currently an adjunct professor in the department of Operative Dentistry at the University of Iowa. He is Board Certified by the American Board of Operative Dentistry. He is a Diplomate of the American Board of Aesthetic Dentistry, a Fellow of the Academy of General Dentistry, American Society for Dental Aesthetics and International Team of Oral Implantologists (ITI). He has written numerous articles on esthetic and implant dentistry, and lectures and presents hands-on courses nationally and internationally on those subjects.
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