Patent ID: 8480574

Claim:
An instrument for isolation of a root apex during an oral procedure, comprising: a flexible membrane; a frame encompassing an outer periphery of the flexible membrane, the frame being configured to fit at least one periapical structure; a connector positioned on the frame and including an aperture therein; a retractor including a body and an arm member, the arm member having a first end and a second end opposite the first end, wherein the first end is configured to be pivotally connected to the body to enable adjustment of an angle between the body and the arm member and wherein the second end is configured to be coupled to the aperture to enable use of the arm member to position the flexible membrane in proximity to the at least one periapical structure; and a retaining member configured to retain the flexible dam around the at least one periapical structure, the retaining member including a shaft having a first end, the first end including a first structure configured to retain the flexible dam around the at least one periapical structure.