V. DENTAL LAB
Dental laboratory technicians have a
high risk of infection by direct exposure to contaminated laboratory
materials. All impressions, bite registrations or other items placed
in the patient's mouth should be disinfected before sending them to
the lab or utilizing the Department's lab.
Impression trays should be cleaned and
heat sterilized for the patient's safety. The impression should be
disinfected for the operator's and lab technician's safety. Refer
to Appendix E.
After the impression is made, rinse it
in water to remove blood and saliva and shake gently to remove
excess water. Spray the impression with a disinfectant until it
glistens and place into a zip-lock bag or immerse in a disinfectant
for 10 minutes, depending on the type of impression material. Rinse
the impression thoroughly and pour up the model. Be sure to use
fresh disinfectant for each impression.
If the impression is sent to the lab,
follow the above procedure and after rinsing, repackage in a
zip-lock bag. Label the box that the impression has been treated.
A removable prosthesis that has been
in a patient's mouth should be rinsed and disinfected before sending
it to a lab.
A nonmetal prosthesis can be soaked in
household bleach diluted 1:100 for 10 minutes and rinsed thoroughly.
Bleach must be mixed fresh daily because it oxidizes quickly. The
prosthesis should then be placed in a zip-lock bag for shipment.
and phenols can be used on non-acrylic metal items as long as they
are sufficiently rinsed before returning them to the patient. The
recommended disinfecting time is usually 10 minutes.
Iodophors can be
used on all materials.
C. Use of Lathe
Protective barriers must always be
worn when working with a lathe. Never use a polishing lathe, rag
wheel , brushes or pumice in the laboratory without first
disinfecting the appliance. Rag wheels can be heat sterilized.
The following is a suggested method on
handling the pumice pan.
pumice pan with plastic wrap.
pumice per patient procedure.
sterilized rag wheel.
the prosthesis as necessary (Refer to Appendix E).
plastic, pumice and change rag wheel.