Technological developments, such
as digital imaging systems, have considerably improved the level of detailed
information available to dentists. Dental X-rays are important in the
diagnostic assessment of patients. Radiographic images help in the diagnosis,
treatment planning and follow up of patients with conditions affecting the
head, face, teeth and jaw. While some dentists have long relied on 2-D imaging
for diagnosis and treatment planning, this technology typically requires
multiple exposures, and with them, multiple doses of radiation.
Computed tomography (CT) imaging,
also referred to as a computed axial tomography (CAT) scan, involves the use of
rotating x-ray equipment, combined with a digital computer, to obtain images of
Jaws/teeth. Using CT imaging, cross sectional images of body organs and tissues
can be produced. Though there are many other imaging techniques, CT imaging has
the unique ability to offer clear images of different types of tissue. CT
imaging can provide views of soft tissue, bone, muscle, and blood vessels,
without sacrificing clarity.
Today, with a properly prescribed
3-D scan, your dentist can gain the ability to collect much more data – often
with a single scan and potentially with a lower effective patient dose. This highly
accurate 3-D image of the patient’s anatomy from a single scan allows the
practitioner to better diagnose and understand the true extent of dental
disease, and they can provide for more appropriate treatment for patients.
Cone beam CT scanners are based
on volumetric tomography, using a 2D extended digital array providing an area detector.
This is combined with a 3D x-ray beam. The cone-beam technique involves a
single 360° scan in which the x-ray source and a reciprocating area detector
synchronously move around the patient’s head. At certain degree intermissions,
single projection images, known as “basis” images, are attained. These are
similar to lateral radiographic images, each slightly counterbalance from one
another. This series of basis projection images is referred to as the
projection data.
Software programs incorporating
sophisticated algorithms including back-filtered projection are applied to
these image data to generate a 3D volumetric data set, which can be used to provide
primary reconstruction images in 3 planes; axial, sagittal and coronal aspect.
Cone beam 3D imaging is evolving
into a “must have” for the innovative dental practices. The added dimension
offers a “surgical view” that adds precision to treatment planning and
implementation. While achieving quality 3D images is an important, capturing
scan responsibly with the lowest radiation dose possible.
Lane Ends Dental Practice is one
of a selected few dental implant centres with an in-house 3D cone beam scanner.
After this non-invasive, 7 second scan we can accurately examine the bone
structure in your jaws. This allows us to precisely diagnose the bone quality
and density for placing dental implants. In addition we get a clear view of the
inside areas of the bone to see and avoid nerves and determine sinus locations.
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