| 摘要 |
A self-retentive, single piece rubber dam has an incorporated elastomeric wedge retention system C in the dam membrane B and integrated, two mode (active and passive) self-retaining flexible frame A. The dam can be flipped from concave to convex modes, gently gripping the patient's face and hooks under the chin (see figures 3-6). The dam may also have a dental napkin material D bonded to the patient-contacting side to improve patient comfort. The wedges C, which radiate from the centre of the dam to the periphery, may be of thickened rubber in a variety of cross-sections (see figure 7). The dam isolates teeth from secretions of the oral cavity and also protects the oral cavity and respiratory or digestive tracts from procedural debris. |
