Wedges are essential tools in restorative dentistry used to adapt matrix bands around the sides of cavities. There are many types and sizes of wedges made from various plastics that are designed for different situations. It is important to use the largest wedge that fits and ensure it does not extend into the contact area between teeth, which can deform the matrix and leave gaps. Multiple wedges may be needed in areas of difficult anatomy. Poor wedge technique can lead to amalgam overhangs after condensation, resulting in periodontal disease and cavities.