Oral infections are caused by different pathogens, some of which are sensitive to amoxicillin, and some of which are not sensitive to amoxicillin, so amoxicillin can treat a part of oral infections, amoxicillin belongs to the semi-synthetic broad-spectrum penicillins, antibacterial activity and antibacterial spectrum are relatively broad. For most pathogenic Gram-positive and Gram-negative bacteria have a strong bactericidal inhibitory effect, including Streptococcus pneumoniae, hemolytic streptococci and other streptococcal genera, staphylococcus, enterococcus faecalis and other aerobic Gram-positive cocci that do not produce penicillinase, Escherichia coli, Aspergillus chrysogeneticus, Salmonella spp, Haemophilus influenza, Neisseria gonorrhea and other aerobic Gram-negative bacilli, as well as strains of non-β-lactamase producing bacteria, and pylorus, as well as β- lactamases. Lactamase-producing strains as well as Helicobacter pylori, have good antibacterial activity, but it has relatively weak therapeutic effect on some staphylococci, acid-producing Klebsiella, Aspergillus, Pseudomonas, Mycoplasma, Rickettsia, Legionella, Divergent bacilli, etc., and has almost no antimicrobial effect on Candida albicans, and so on, and so on, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth. Oral and maxillofacial infections are dominated by purulent bacterial infections, and the common causative organisms are mainly Aureus, hemolytic streptococcus and Escherichia coli, Pseudomonas aeruginosa, part of anaerobic bacteria, and part of fungal infections, so amoxicillin is only able to play a therapeutic role for part of the oral infections.