Preparations and recruitment
alcohol abuse, allergies
ALLERGIES
The survey was designed as a prospective study and was conducted at the Department of Prosthodontics (Center for Dentistry and Oral Medicine, Frankfurt, Germany) over a 1-year period from January 2019 to January 2020. Having obtained approval from the institutional ethics committee (ref. 71/14), potential participants were recruited from patients in need of dental prosthetic treatment who had an appointment for treatment planning. Only patients were included who were ≥ 20 years old, had an adequate command of spoken and written German, gave their consent to participating in the study, and for whom recent (≤ 6 months) radiographic documentation was available. Cases not found to require prosthodontic treatment, pregnant women, as well as patients with a record of drug or alcohol abuse or with known allergies to dental materials, were excluded.