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John R. O'Brien, D.D.S., P.C.


Dr. O’Brien has worked as a dentist in the Chicagoland area for the past 31 years.  He received his Bachelor’s degree in Psychology/Biology in 1982 from Loyola University of Chicago.  Dr O’ Brien then attended Loyola University School of Dentistry from which he received his dental degree in 1986.  He is a member of the American Dental Association, Illinois State Dental Society, Chicago Dental Society and is an active member of the Xi Psi Phi Dental Fraternity from the Loyola Chapter.


Dr. O’Brien is from Chicago, Illinois.  He is married to Adeline and they have lived in Tinley Park, Illinois for the past 28 years.


Dr. O’Brien is a general dentist who offers dental care for your whole family.  His expertise is with tooth shaded (mercury-free) composite fillings, root canals, whitening, simple extractions, implant restorations, inlays, onlays, crowns, veneers, bridges, dentures, denture repairs, relines, partials and flippers.  He continually refines his skills with continuing education to give his patients the best quality care and to offer them the latest technology and advances in the dental field.


Dr. O’Brien is very gentle, personable and enjoys getting to know his patients.  He is very outgoing and he will put you at ease with his smile and charm.  Dr. O’Brien is very thorough and will take time to listen to any dental concerns and answer any questions the patient may have.



Eugenie Guzman-Darling, D.D.S.


Dr. Darling has been with our office since August of 2003.  Before joining our staff, Dr. Darling practiced in the south suburbs for over twelve years.


She is fluent in Spanish, and her gentle nature puts our patients at ease.  She received her degree in dentistry in 1980 from the University of Costa Rica, and trained for a year at Northwestern University in Chicago in 1989.


She is a member of the Chicago Dental Society, Illinois State Dental Society, American Dental Association, and Costa Rica Dental Society.


Dr. Darling is very thorough and loves helping patients understand their overall dental health.