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Figure 40: I find that the 3M ESPE retraction paste rinses
out more easily than other retraction pastes — another common
complaint I have with them. As I examine the final impression,
I am impressed with how good it looks. I still think I would
have had more retraction with a second cord on top of the #00
cord, but it might be the best cord-free impression I have taken.
I’m not switching from retraction cord just yet, but this new
product is a step in the right direction.
Figure 41: Having practiced around dental technicians for the last
12 years, I always hear them talking about what they want to see
in a bite registration. They want the bite registration material to be
only on the hard tissue. They also want the material to be between
only the prepped and the opposing teeth; they don’t want any
material between the unprepared teeth. It simply needs to capture
the incisal thirds of the prepped teeth and the incisal thirds of the
opposing teeth. After taking the bite registration, we put the temps
back on and schedule the patient to come back one week later.
Figure 42: Seven days later we remove the temps. To clean up the
preps, I know no better way than with my KaVo SONICflex ® scaler
(KaVo Dental). This scaler will blast any temporary cement — even
Durelon ® (3M ESPE) — off the preps, leaving behind no trace of
cement that could interfere with seating. The scaler doesn’t spin,
so even if you accidently bump the tissue, it won’t cause bleeding.
Figure 43: After trying in the crowns and getting the patient’s
approval, we place two one-minute coats of G5 All-Purpose
Desensitizer (CLINICIAN’S CHOICE; New Milford, Conn.) on the
preps. We are going to use Ceramir ® Crown & Bridge cement
(Doxa Dental; Newport Beach, Calif.) to place the BruxZir crowns,
so we don’t need to use the Ivoclean ® solution (Ivoclar Vivadent)
or Z-PRIME Plus (Bisco Inc.; Schaumburg, Ill.). Because Ceramir
doesn’t rely on phosphates to bond to the zirconia, the salivary
phosphates do not affect it, so there is no need to use a zirconia
primer. As always, we place tooth #8 & #9 first to ensure proper
seating, applying pressure apically with pinewood sticks.
34 www.chairsidemagazine.com