[Influence of registries on the quality of care].

Registries are a topic of lively debate amongst all stakeholders in healthcare, politics and economics. In general, registries are national or international (prospective) databases documenting the current state of diagnostic, therapeutic and long-term outcome variables of subjects with a distinct condition or health problem. The access to and handling of registry information is subject to strict legal, methodological and ethical principles and regulations before these data can be scientifically utilized and reentered into the routine daily practice. Because of the representativeness and reality of data, registries are widely regarded as the backbone of health systems and budgets.Currently there is only indirect evidence that registries influence outcomes and the quality of care. Recent statistical techniques may allow quasi-experimental modelling of observational information. In orthopedic and trauma surgery, current and upcoming registries should be wisely utilized to develop and evaluate innovations and to make informed decisions relevant to care.