question: MY SON HAD A ROOT CANALDONEBUT HAD INITIALLY STARTED THE PROCEDURE 10 WKS AGO AND WAS TOLD TO RETURN IN A FEW WKS BUT DID NOT RETURN FOR6-7 WKS LATER TO FINSH THE PROCEDURE.wHEN HE DID HE WAS IN ALOT OF PAIN AND THE DENTIST TOLD HIM THERE WAS ALOT OF PUSS AND PROCEDED TO DO THE ROOT CANAL AND SENT HIM HOME ON AMOXICILLIN WITHIN 2 DAYS HIS CHEEK BECAME RED AND VERY SWOLLEN AND VERY PAINFULL HE RETURNED TO SEE ANOTHER DENTIST AND WAS TOLD IT LOOKED VERY BAD AND PUT HIM ON DEXAMETHASONE AND CLINDAMYCIN TWO DAYS LATER HE WAS ADMITTED TO HOSP.WITH A SEVERE ABSECC AND INFECTION HAD SPREAD  TO HIS MANDIBULAR ANDTEMPORAL BONE. MY QUESTION IS SHOULD THE DENTIST HAVE KNOWN HOW BAD THE INFECTION WAS AND SHOULD HE NOT BEEN REFERRED TO AN ORAL SURGEON