Amalgam matrix for class II and class V preparations connected at the proximal box

Area of Science:

• Restorative Dentistry
• Dental Materials Science

Background:

• Combined Class II and Class V preparations present challenges for amalgam matrix placement and condensation.
• Traditional methods can lead to voids and microleakage, particularly at the line angle.

Purpose of the Study:

• To present a novel technique for placing and reinforcing an amalgam matrix in combined Class II and Class V preparations.
• To improve the control and quality of amalgam condensation in challenging preparation designs.

Main Methods:

• A temporary composite wall is used to support amalgam condensation in the Class V aspect.
• The matrix band is internally reinforced with smaller matrix pieces and light-polymerized resin-saturated cotton.
• External reinforcement is achieved using fast-polymerizing vinyl polysiloxane material.
• Amalgam is condensed sequentially, starting from the line angle through the proximal box and then the occlusal aspects.

Main Results:

• The described technique allows for controlled amalgam condensation, even at the difficult line angle.
• This method effectively minimizes the risk of voids and microleakage at critical interfaces.

Conclusions:

• The technique provides a stable and inexpensive direct restoration option for connected Class II and Class V preparations.
• It offers a viable alternative to crowns for patients seeking direct restorative solutions.