Estimated reading time: 2 minutes
by Dr Jacalyn Madden, The Smile Spot, Dulwich Hill, NSW
Class II restorations are the bread and butter of most dental practices. Often the success of these seemingly straightforward treatments relies upon more than just a one-size-fits-all matrix system.
What’s good about it
Our clinic has access to multiple sectional matrix systems, but my preferred choice is the Garrison Composi-Tight 3D Fusion Kit. It delivers multiple components for better adapted and contoured class II restorations. The system comprises three separate ring designs to suit different preparations. A wide preparation ring is ideal for tougher class IIs and has the ability to be used with missing cusps. Additionally, the horseshoe shape of the rings allows for an improved separating force to aid in creating tighter contacts. The silicone extensions prevent the rings from springing off.
The matrix bands come in canine or premolar, molar and subgingival molar designs. Placement is easy and the pre-curved nature of the tabs helps create an ideal anatomy for the restoration. At 0.0015 inches thick, the band ensures a tight contact when using appropriate wedges.
The wedges are designed with silicone feathering, allowing for interproximal irregularities. They also prevent the wedge from slipping out of the prep during material or ring placement. It’s gentle on compression, reducing the risk of gingival trauma.
What’s not so good
The bands are quite soft and flexible, and can bend on placement. This is especially true when navigating either subgingival or conservative restorations where the space for matrix placement is tight. The tab on the band is very small and can be difficult to grasp with ordinary dental tweezers, especially with a tight contact pre-adjustment.