first of all i hope that you know what managed care means.
in case you dont, managed care is a plan which applies to a HMO insurance system. under managed care, a dentist gets $5 per month for every patient that chooses this dentist as his/her primary care dentist. the dentist gets $5/month whether the patient see the dentist every month or not.
this means that if a particular dentist has 1000 patients assigned to him, he gets $5000/mo even if none of these patients need any services.
in return, however, when one of these patients do need something, the dentist has to do all the work (excluding major work) without receiving any money from the insurance company. so, what happens is when a HMO patient goes to his dentist, the dentist doesn't really want to do the job since he won't get any $$ for the services he will be providing. another words, the dentist is losing money here.
now, i hope this has helped you in how you want to answer this question.