A class II composite restoration in posterior teeth seems hard when a sectional matrix is not an option due to a lack of an adjacent tooth (which would typically be supporting the ring). However, the procedure can still be done using the specialized design of Tor’s Overmat system. It is a highly effective solution for such complicated cases given its retainerless design. This feature also makes it an excellent alternative to Tofflemire.
The system provides various advantages; increased precision while maintaining patient comfort as well as field visibility. It also guarantees an adequate anatomical shape, which in turn, does not interfere with light curing. Furthermore, multiple restoration can be performed simultaneously due to the lack of a traditional matrix retainer and subsequent decreased in tensioning force. Lastly, this method is incredibly time effective as minimal finishing work is required.
The Overmat System is available in two distinct styles: contoured and flat. There are also different height options: 6mm for premolars and 7mm for molars. The bands are made of steel and are found in 40pcs per pack. Additionally, the systems are colour coded for increased convenience.
To facilitate instillation, there is a separately sold Overmat Matrix Holder.
To apply the system:
1) Fasten matrix holder to the matrix with one quick click. The tightness can be adjusted by rolling the tensioner upwards.
2) Once it is secured, the band can be placed around the desired tooth.
3) The matrix band can now be readjusted to a satisfactory degree and can be detached with another click.
When looking to preserve the greatest amount of natural tooth structure, a conservative deep margin elevation procedure would be an ideal approach. This can be accomplished with the help of the Overmat System while avoiding more invasive procedures such as crown lengthening. This meticulous system provides the necessary band seal along with control which are both required for successful relocation of deep margins.
In summary, it is clear that the Overmat System is versatile in function and offers significant convenience. Its implementation guarantees an effective class II composite restoration with minimal destruction and maximized comfort.