The calendar in the lab gives you the “due date” for all cases. Each day check to make sure all cases due the next day are here.
This is critical. You must check in every case before the client arrives for the seating appointment. All cases are expected at least two days before the client’s appointment.
Don’t put yourself in the position of having a client in the reception room, the doctor waiting, and you frantically running around the lab, praying the case is there somewhere! I promise you, your under arm deodorant won’t be able to stand that much stress!
Make it part of your routine each morning to check in all the cases due that day. If any are missing, check with the lab that morning! After all you’ve still got 72 hours until the client arrives. If the case isn’t ready, give the lab 24 hours to complete it. Put a red star on the lab case flow sheet to remind you. The next morning, either get the case from the lab, or reappoint the client several days so you can have time to evaluate the case and make any needed changes before the client arrives.
Each morning, unpack the cases, and set them in the lab across from the hydrocolloid. On the day the case arrives, you will need to check it out. Each type of case has its own checklist. Don’t just put the case away, check it out. If something doesn’t look right, show the doctor.
We send labwork to _____________. The labs will bring us completed cases in our lab area. We also use _________________ for partial dentures. You will need to pack these using the boxes in the lab. You will also need to call the labs to have these cases picked up. Put the packed box (with the lab slips inside and the label on the outside) at the front desk and tell the secretary to expect the pick up.
A. Read the green lab slip make sure all these steps were followed.
B. Remove the partial denture framework from the model and
1. Check the inside under the microscope to make sure there are no metal bubbles on the framework that would touch the teeth and prevent the framework from seating completely
2. Casting should be well polished and smooth
3. Clasps should have no nicks or weak spots that could weaken and fracture when the client is using it
C. Make sure green lab slip steps were followed.
1. Case should be returned in sealed plastic bag with sterilizer solution
2. We should have opposing model, duplicate working model of arch case designed on, and the partial denture
Crown and Bridge Cases
The crown check-in box lacated in lab (left of desk) has all materials for checking.
A. Check shade of porcelain against Vita shade guide does it match shade chosen?
B. Was die coated with cyanoacrylate it will look shiny if this done (This hardens the model and prevents chipping of the die.)
C. Use articulating paper and check the bite. Do the contacts look like the contacts on the yellow treatment sheet?
D. Under the microscope
1. Look at the inside of the crown remove any small bubbles using a small round bur on the lab engine
2. Remove die from cast with a lab knife to see margins under the microscope more clearly.
3. Is the red margin present all the way around the die? If not, go to the second die in the lab pan and check the fit on that die. The crown must fit all the way around, tightly.
4. Does the porcelain look like a tooth? If the crown doesn’t have the same shape as adjacent teeth, then it needs to be done over.
5. Have the proximal surfaces of the adjacent teeth been cut away?
6. Does the crown have the same anatomy as the adjacent teeth?
7. Are the proximal surfaces well contoured?
8. Is the texture similar to adjacent teeth?
9. Check the marginal fit under the microscope.
i) Embrasures wide enough to floss
ii) 1/2 1mm reduction of ridge on cost
Articulator Crown Prep
1. The first pour you do with yellow stone. Pour stone into crown prep, place in articulator on B side, after filling B side with stone.
2. The second pour you do with green stone. Pour stone on crown side of crown prep placing a little bit of retention stone at one of the sides. Place pins through the center of your margins where your crown will be and the one next to it.
3. Put hole in side A so that pins can stick through it. Around the pins put sep around them. Place about 4 coats of sep around pins. The go ahead and mix yellow stone. Put on green stone around pins and articulator A. Close the articulators to where everything meets. Always make a second pour and let the doctor decide which to send into the lab.
Has learned all lab duties
Signature of advanced chairside Date