title: Persistence of contaminant bacteria in dental laboratory pumice.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification*; D007754:Laboratories, Dental; D017640:Silicates; D012824:Silicic Acid; D012822:Silicon Dioxide; D013997:Time Factors
chemical_list: D017640:Silicates; D012824:Silicic Acid; D012822:Silicon Dioxide; C005144:pumice