1 CostHelper readers without insurance report paying $830-$2,465 for a metal crown, at an average cost of $1,353. 2  CostHelper readers with insurance report out-of-pocket expenses of $519-$1,140, for an average payment of $882. CostHelper readers without insurance report paying $860-$3,000, at an average cost of $1,430. 2  CostHelper readers with insurance report out-of-pocket expenses of $530-$1,875, for an average payment of $953.
ESBL stands for Extended-Spectrum beta-Lactamase. Beta lactamases are enzymes that are produced by many types of bacteria (germs) which make them more resistant to antibiotics and can make the infection harder to treat.
E. coli bacteria on the left are resistant to beta-lactam antibiotics, and grow next to one antibiotic (bottom) and are less inhibited by another antibiotic (top). Plasmid encoded beta-lactamase is responsible for the emergence of resistant strains of Enterobacteriaceae.