On September 23, 1983, the Argentine Association for the Study of the Hip and Knee (A.CA.RO) was established with the purpose to "Further the education through scientific meetings, seminars and surgical workshops, and promote research".

The founding members were the following physicians: Jorge Buttaro, Carlos Cabrera, Edgardo Casullo, Francisco Celoria, Carlos Contempomi, Arnoldo Didier, Leoncio Fernandez, Adolfo Fernandez Vocos, Carlos Llorente, Valentín Martinez Mosquera, Arturo Otaño Sahores, Luis Petracchi, Manuel R. Piñeiro, Rodolfo Pusso, Mario Rodriguez Sammartino, Ramón Saráchaga, Salomón Schächter, Guillermo Vazquez Ferro and Eduardo Zancolli.

Our Association’s first Congress was held on December 2 and 3, 1987 at the Buenos Aires Sheraton Hotel, chaired by Eduardo A. Zancolli M.D. The foreign speakers were Pedro Guillén García (Spain), Mark B. Coventry (U.S.A.) and William B. Enneking (U.S.A.); and it attracted approximately three hundred attendants.

Initially each Executive Board had a two-year mandate. Starting in 1990 the by-laws were amended and the term was established in one year.

In 2001 the by-laws were again amended, extending the term to two years.

This amendment established the accreditation of "Orthopedic Surgeons specializing in Hip and Knee Surgery" as well as services in line with the experience and skills in such pathology.

In 2001 the Biannual Course on Hip and Knee Pathology was launched, and in 2002 the annual frequency of the A.CA.RO Congress was changed to two years, intercalating the National Course in the interior of the country in between.
Its purpose is to approach the colleagues of the interior of the country and provide a possibility for them to participate in its organization. This may lead to establishing branches in the provinces.