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.
TEM-1 is the most commonly encountered beta-lactamase in Gram-negative bacteria. Up to 90% of ampicillin resistance in E. coli is due to the production of TEM-1.