Dentaltown February 2015 - (Page 38)
prosthodontics
feature
Fundamentals and
New Concepts in
Impression Taking
by Gary Alex, DMD
D
espite the increasing use of digital scanning,
conventional impression materials such as
polyether and vinyl polysiloxane (VPS) are still
the materials most often used by dentists when
taking crown and bridge impressions. It makes
sense for dentists using these materials to stay up to
date on improvements and techni ue modifications so
they can be efficient minimi e cost and capture impressions that are as accurate as possible. This article
will examine some of the idiosyncrasies and nuances
of both polyether and VPS impression materials, as
well as touch on techni ue and mixing modifications.
The basics of impression materials
While other alternatives exist, crown and bridge
impression materials today are concentrated in two ma-
38
FEBRUARY 2015 // dentaltown.com
or categories polyether and
. irtually every aspect of VPS and polyether materials has been improved
in some way over the last several years. Physical and
chemical properties such as tear strength elastic memory dimensional stability hydrophilicity viscosity ow
Top left: Automatic mixing units allow for a more thorough,
faster, easier, and cleaner mixing, and are one of the best investments you can make to improve the impression-taking experience. (Shown: 3M ESPE Pentamix 2 and 3M ESPE Pentamix 3)
Top right: Excellent detail displayed from use of VPS impression
material. (Shown: 3M ESPE Imprint 4 VPS Impression Material)
Bottom right: Polyether impression materials have excellent
flow characteristics and, once set, form a rigid polymer matrix.
(Shown: 3M ESPE Impregum Impression Material)
http://www.dentaltown.com
Table of Contents for the Digital Edition of Dentaltown February 2015
On Dentaltown.com
Howard Speaks: Podcasts: Basically, They’ll Rock Your World
Professional Courtesy: Tidbits For National Children’s Health Month
Continuing Education Update
Kerr Sonicfi ll Thoughts and Deals
Mini Implant Partial Failure and Treatment with PRF in the Anterior
Industry News
Fundamentals and New Concepts in Impression Taking
Lock in Your Profi t: The Reliable Use of Mini Implants
Office Visit: Hometown Doc is Moving on Up
Giving Patients a Historical Perspective on Fluoride and Vaccines
Posterior Composites and Universal Bonding Agent Applications in the Modern Dental Practice
Denture Troubleshooting: Solving Common Post-Insertion Problems
Pediatric Dentistry: Pulp Therapy and the Stainless-Steel Crown
Poll
New Products
On the Road Again: Learning More About Your Dental Supply Reps
Ad Index
How Do We Get More Patients?
CBCT? Which One? Beating a Dead Horse One More Time.
You Should Know: Cinema ProMED
Dentally Incorrect
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