Estimated reading time: 2 minutes
by Dr Tim Maxwell, Dentist WA, Canning Vale, WA
The Gergis Matrix was created by South Australian dentist, Dr Bill Gergis. It’s designed to elevate deep proximal boxes for anterior and posterior teeth.
What’s good about it
There are two issues conventional matrices face with deep proximal boxes. Firstly, the shape and height of a regular tofflemire prevent it from hugging tightly around the neck of the tooth subgingivally. Secondly, sectional matrices need wedges to stabilise them and in deep boxes the wedge pushes the matrix causing an underhang. With a regular tofflemire, the emergence profile is often too straight, causing a wide embrasure space that may collect food.
The Gergis Matrix solves all of these problems with its narrow width and banana shape. It adapts very tightly around the neck of the tooth, so a wedge is usually not necessary. It flares out significantly, providing a beautiful emergence profile. It’s so easy to use that deep margin elevation has gone from a stressful procedure to one that’s relatively stress free.
Prior to the invention of the Gergis Matrix, the only way to achieve deep margin elevation was to modify a conventional tofflemire band with scissors, or use an expensive reel matrix. Modifying conventional matrices weakens them and they would often snap. Dr Gergis has set a very low price point and the matrix works with existing tofflemire holders.
What’s not so good
The Gergis Matrix is designed for use with a tofflemire holder so there may be a learning curve. In small mouths and crowded working environments, the tofflemire holder can take up a lot of room. It also isn’t a solution for every deep margin.
