Cohen L K
Int Dent J. 1976 Sep;26(3):293-8.
The study originated from the common need felt by the United States Public Health Service and the World Health Organization for objective information about various national dental care delivery systems and their effectiveness in the societies in which they were used. The relationships between consumers, providers and administrators within each system were emphasized rather than the comparison between systems since each operated within a specific biological and ecological environment. Six systems all of which had been in existence for at least twenty years were originally selected for study to encompass those dependent on a majority of government or private enterprise, use or non-use of auxiliaries, differeing systems of financing and of definition of target groups for receipt of services. The countries originally taking part were Australia, the Federal Republic of Germany, Japan, New Zealand, Norway and Bulgaria, though Bulgaria withdrew early in 1975.
该研究源于美国公共卫生服务局和世界卫生组织的共同需求，即需要有关各国牙科护理提供系统及其在使用这些系统的社会中的有效性的客观信息。由于每个系统都在特定的生物和生态环境中运行，因此强调的是每个系统内消费者、提供者和管理者之间的关系，而不是系统之间的比较。最初选择了六个已经存在至少二十年的系统进行研究，以涵盖那些依赖政府或民营企业多数、使用或不使用辅助人员、不同的融资系统以及接受服务的目标群体定义的系统。最初参与的国家有澳大利亚、德意志联邦共和国、日本、新西兰、挪威和保加利亚，不过保加利亚于1975年初退出了。
