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In a previous issue of The Dentist’s Network newsletter, we looked at the different forms of digital radiography: scanners, phosphor plates, and digital sensors. Obviously, there are many different systems and some are better than others. However, I do want to back up a moment as there is another, even more important issue that needs to be discussed.
Most offices spend so much time choosing their digital radiography system, evaluating components for resolution, line pairs/mm, comfort, size, and of course, cost. However, many of those dentists will then install the systems on older computers with even older monitors, and are often disappointed with the results. The problem is that many do not realize that the computer monitor is the limiting factor in these situations. Dentists purchase digital systems to not only eliminate film and chemicals and mounts, but to also allow the patient to participate in the diagnosis of their disease. When your monitor doesn’t allow you to see the images clearly, you will be fighting an uphill battle. So, it would be wise to evaluate your monitors and see if a replacement is warranted.

When looking at new monitors, there are many factors that should go into the process of picking the best monitor for your office:
LCD vs. CRT
Up until about 3-4 years ago, CRT, or cathode-ray tube monitors, dominated the marketplace. These are the large, bulky, TV-type monitors that are still being used in many offices. Over the past couple of years, though, LCD, or flat panel monitors, have become increasingly popular. These monitors take up considerably less space and by mounting them to an articulating arm, dentists can easily position the monitor wherever they choose. As prices have continued to drop and image quality has improved, the majority of offices installing new monitors are using flat panels. Dentists should be aware, though, that LCD monitors work differently than CRTs. For example, if you use a light pen with your older monitor, you will not be able to use this with an LCD. A decent 17” monitor can be found for around $200.

Size
Basically, I recommend getting the largest monitor that you can afford. Recently, the monitor that seems to give the best “bang for the buck” is the 17” LCD. While 15” models have dropped below $150, the 17” costs, on average, only $50 more and the extra screen size is noticeable for most people. One thing to consider with LCDs is the “native resolution”. This is the resolution that the monitor is meant to run; any other resolution tends to produce a fuzzy image. For 17” monitors, it is typically 1280 X 1024. The reason this is important is that as the monitor size increases, so does the native resolution…which makes the icons smaller. Some people will have trouble seeing and working with small icons.
Brightness and Contrast
Although most monitor manufacturers will tout the brightness of their monitors in their marketing materials, for dental offices, the contrast ratio is actually the more important number. Brightness is measured in candela per square meter (cd/m2). Ideally, a monitor should be at 250 or greater. Contrast ratio, though, is the key issue. A contrast ratio measures the difference in light intensity between the brightest white and the darkest black. High contrast ratio represents a much better color representation on the monitor than a lower contrast ratio. Obviously, this will come into play when trying to identify incipient interproximal caries on the monitor. You should look for a monitor with at least 500:1 contrast ratio. Some of the better monitors have 700:1 ratio or better.
Dot Pitch
Another specification that is often discussed with monitors is dot pitch. Dot pitch, or pixel pitch, is the amount of space, in millimeters, that separates two phosphors of the same color. If a monitor has a dot pitch of 0.27, there are 0.27 millimeters from one red phosphor to the nearest red phosphor in an adjacent pixel. Smaller is better. Most CRTs win this game, as the better monitors have a 0.22 dot pitch. That is why, at most dental meetings, the vendors demonstrating intraoral cameras will almost always show them on a small CRT monitor. LCDs, on the other hand, average about 0.27 to 0.29 mm dot pitch.
Dentists who are looking to become paperless should evaluate all aspects of their systems as they move towards a primarily digital dental office. Monitors are a key, but often overlooked, part of this process.
Lorne Lavine, DMD is the Founder and President of Dental Technology Consultants. Dr. Lavine holds two prestigious certifications, the A+ Certified Technician designation and the Network+ Certified Professional. These designations demonstrate proficiency in computer repair, operating systems, network design and installation. Dental Technology Consultants provide dentists a full range of services relating to the implementation of technology.
Dr. Lavine can be reached directly at 1.866.204.3398.
Interested in speaking to Dr. Lavine about your technology concerns? Email him at Drlavine@thedentistsnetwork.net
Interested in having Dr. Lavine speak to your dental society or study club? Click Here.
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