Hello, Proper disinfecting techniques should be used by the laboratory and the dental office before sending you dental lab cases. It is unlikely that a patient blood borne disease has been transmitted to you. Some contamination may have entered your bloodstream from being cut from your tools or laboratory materials. You may have an infected cut due to poor healing. How deep was your cut? Did you clean out the cut sufficiently? Take some anti-inflammatory medication such as Tylenol or Motrin in. Check for signs of inflammation around the cut such as swelling, redness, or any type of drainage. Use some antibacterial medication and keep the area clean. See your physician if you continue to experience symptoms. You may need a prescription antibiotic. You can have simple blood tests performed to put your mind at ease. Thank you for your inquiry. I understand your concern because you do not know how the materials were handled prior to arriving at your lab or the history of the patient. You can always call the dental office to explain your concern and ask for some information on the particular patient. I hope you will start to feel better soon.