Dentaltown September 2015 - (Page 68)
radiology
feature
Seeing the True
Resorption Picture
by Shawneen M. Gonzalez DDS, MS
External resorption. Note the blunting of
the apices on the teeth shown.
R
esorption is the loss of tooth
structure due to odontoclastic processes. It may occur
on either the external surface (external
resorption) or the internal surface (internal resorption) of a tooth. Both external
resorption and internal resorption can
involve either the root or crown.
External resorption
External resorption starts from the
external surface of a tooth and moves
toward the pulp chamber and/or rootcanal space. External resorption is more
common than internal resorption and is
frequently seen at the apices of the mandibular incisors, canines and premolars.
68
SEPTEMBER 2015 // dentaltown.com
Internal resorption. Note the enlargement
of the lateral incisor root-canal space and
how this area is continuous with the canal.
Invasive cervical resorption. Note the loss
of tooth structure in the cervical regions
of the canine and first premolar. The
root-canal space appears to be intact with
a thin layer of dentin separating it from the
resorptive process.
It can occur on any portion of a tooth
that is within bone. One subcategory of
external resorption starts at the cervical
region of a tooth and quickly moves
throughout the root, sparing the pulp
chamber and root-canal space until the
fi nal stages of resorption.
This subcategory is referred to as
invasive cervical resorption. The etiology of external resorption has been
attributed to many things, including
but not limited to: local inflammatory
lesions, trauma, re-implanted teeth, neoplasms, cysts, excessive mechanical and
occlusal forces and adjacent impacted
teeth-however, it is frequently idiopathic. External resorption typically
does not present with any clinical signs
or symptoms, as the affected tooth structure is surrounded by bone.
Radiographic appearances
External resorption that occurs at
the apex of a tooth presents as a blunted
root apex instead of nicely tapering to a
point. If it occurs on the lateral root surface, it may present on a radiograph as a
notching or concave defect on the mesial
or distal root surface. If it occurs on the
lateral root surface and is positioned
over the pulp chamber and/or root-canal
space, it presents as a well-defi ned, radiolucent area. To determine if the radiolucent area is coming from the lateral root
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Table of Contents for the Digital Edition of Dentaltown September 2015
On Dentaltown.com
Continuing Education Update
Industry News
Product Profile: Planmeca
New Products
You Should Know: Lean Dental Solutions
Practice Solutions: Ultradent
Ad Index
Dentally Incorrect
CONTINUING EDUCATION: Considerations for Treatment of External Cervical Invasive Resorption
Case Report: Microbrush Stamp Technique
Working Through Pain: How Chronic Conditions Affect Dentists
HOWARD SPEAKS: Know Your Numbers
PROFESSIONAL COURTESY: TV Shows for Dentists
Passivhaus: Dentists Get Their Green On
A Green Dentist in a Bluegrass State
NuSmile Preveneered SSC Tips
Yet Again, Immediate Molar— Drill First, Extract Later
Turning Over a New Leaf
The 5 Tenets of Practice Success
Understanding the Sjögren’s Patient: Facilitating Diagnosis of Sjögren’s Syndrome
Sleepy Hollow Dentist Wants to Make a Change
Seeing the True Resorption Picture
Oral Squamous-Cell Carcinoma Detection
Solutions for Effectively Managing a Dental Offi ce
Seminar and Travel Pay: It’s No Vacation
Insurance Management is Easy if You Start with Evaluation
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