[General aspects of planning fixed dentures on implants]

Designing of fixed replacements also containing the implant abutment is determined by that none of the implant kinds can be regarded as first rate abutment tooth in view of loadability. In the course of designing bridges the prosthetic principles regarding the weaker or damaged periodontic teeth are followed. Burning sensation is a common complaint in the patients suffering from a contact allergic reaction of the oral cavity. Several studies are available in the literature for testing the allergenicity of dental materials. Standard test series were designed to detect allergens present in plastics and metals used in prosthetic dentistry. The epicutaneous patch-test was carried out with Finn Chamber. The test material was placed into the chamber, which was applied on the back of the patients for 24 or 48 hours, and was read after removal at fixed intervals. The authors stress the desirability of the allergic prescreening in dentistry.