BackgroundAgainst the background of well-described associations between oral and general health, collaboration between dentists and general practitioners (GP) is crucial to provide therapeutic and preventive patient care. However, in the German health system, GPs and dentists are organizationally separated, implying that interprofessional collaboration can only occur informally and on a voluntary basis. Given the scarce evidence of interprofessional collaboration between dentists and GPs, an explorative study was conducted. This paper outlines the findings of this study with regard to GPs’ and dentists’ experiences and expectations of interprofessional collaboration.MethodsSemi-structured interviews were conducted with GPs (n = 15) and dentists (n = 13) from three structurally different regions in Baden-Wurttemberg, Germany. The interview guide included questions on occasions, expectations and experiences of interprofessional collaboration. The interviews were transcribed verbatim and analysed using qualitative content analysis according to Mayring.ResultsBoth GPs and dentists reported perceived knowledge deficits of the other profession with regard to medication, particularly anticoagulants and bisphosphonates, as well as systemic and general respectively dental diseases. Expectations regarding the scope of collaboration diverge: whereas dentists were interested in extending collaboration, most GPs saw no need for collaboration.ConclusionsThe perceived medical knowledge deficits of the other profession as well as divergent expectations concerning the scope of collaboration hinder profound and regular interprofessional collaboration between GPs and dentists. These perceived knowledge deficits may be rooted in the separate education of dentists and GPs in Germany. Fostering interprofessional education is a promising way to improve cooperation between GPs and dentists in the long term.