Dentaltown August 2018 - 82

The pursuit of an ideal
restoration continued
until dental zirconia
was introduced.
Originally used for
frameworks and
copings, this zirconia
was very opaque and
strong and, for many
of us, P2Z (porcelain
fused to zirconia)
became a popular
discussion.

Retentive prep: Sandblast the interior of the zirconia restoration.
Clean the tooth preparation with flour of pumice and water on a rubber
cup, place a desensitizer/disinfectant on the tooth preparation for two
1-minute applications (such as Gluma from Heraeus Kulzer or MicroPrime
from Danville Materials) and suction it off (do not wash it off) and seat
with RMGI cement such as Meron Plus AC by Voco or RelyX Luting
Plus from 3M.
Minimally retentive prep: Sandblast the interior of the zirconia
restoration. Place an MDP primer on the interior of the restoration (e.g.,
Z-Prime Plus from Bisco or Monobond Plus from Ivoclar Vivadent).
Roughen the tooth preparation with a coarse diamond and clean the tooth
preparation with flour of pumice and water on a rubber cup. Place a tooth
desensitizer/disinfectant on the tooth preparation and suction it off (do not
wash it off). Place a bonding agent-I use Futurabond U from Voco-on
the interior of the restoration and the exterior of the tooth preparation,
then seat with a self-adhesive or adhesive cement.4
Examples of self-adhesives include Bifix SE by Voco and RelyX
Unicem 2 by 3M. Some adhesive cements to use include Bifi x QM by
Voco and Panavia by Kuraray Dental.

Conclusion
As a clinician, it is amazing to witness the changes in the materials we
use, such as with the evolution of restorative materials and glass ionomers
over the years. We must always use the best material for the treatment we
are rendering as our patients deserve the best. Staying informed in changes
and keeping up-to-date is our responsibility as professionals. RMGI cements
are proven materials for the cementing zirconium restorations. As in all
procedures, proper protocol must be followed to achieve the maximum
success. However, the research continues, as it should, to evolve and improve.
Have we achieved the ideal restoration? As of this writing, I am glad to
say dentistry as a profession will always continuously seek better materials,
restorations and products. The pursuit goes on. ■
References
1.
Arce C, Park S, Lawson NC. Multilayered Translucent Zirconia Crowns: Inside Dentistry April 2018.
2.
Makhija SK, Lawson NC, Gibert GH, Litaker MS, McClelland JA, Louis DR, et al. Dental material
selection for single-unit crowns: findings from the National Dental Practice-Based Research Network. J Dent
2016; 55:40-47.
3.
Fagan M. Taking the mystery out of cementation decision making: Dental Economics 2016 April 19; 106 -4.
4.
Christensen G. Cementing zirconia restorations: Dental Economics 2016 July13:62-64, 82.
5.
Kim Dh, Son Jeong SH, et al. Efficacy of various cleaning solutions on saliva- contaminated zirconia for
improved resin bonding. J Adv Prosthodont. 2015;7:85-93
6. Kirty P, Shashikant S, Sibel A, et al. Effect of cleaning protocols of saliva- contaminated zirconia-restorations: shear bond strength. J Dent Res. 2015;94(special issue A0.
Abstract 3656.
7. Wilson AD, Kent BE. New translucent cement for dentistry. The glass ionomer
cement. Br Dent J. 1972; 132(4): 133-135.
8. Hewlett ER, Mount GJ. Glass ionomers in contemporary restorative dentistry-a
clinical update. J Calif Dent Assoc. 2003;31(6): 438-492.

AUGUST 2018 // dentaltown.com

http://www.dentaltown.com

Table of Contents for the Digital Edition of Dentaltown August 2018