At first it may seem daunting to try and choose between the various brands of self-contained dental units available. Prices can vary widely with some seemingly too good to be true to even higher priced units not always being clear on what and how well they work. The purpose of this article is to simplify the purchase decision and explain some of the mechanical features and what to look for when comparing different models of mobile dental delivery carts for your office.
Vibration – We will start our discussion with one of the most overlooked but important characteristics of evaluating a mobile dental delivery unit. An ideal mobile dental delivery system will have powerful compressor and dental vacuum performance which means the motors could generate significant vibration. Vibration leaving a chassis can cause sound but also can make the work surface unusable if instruments and trays vibrate excessively and cause further sound or even fall off during a procedure. A well-designed dental unit will ensure that the vibration is minimal and allows for dental procedures to be performed without the interruption of tools vibrating off and that storage of trays and instruments can be utilized on the top of the system.
Look for these specific features when evaluating a portable dental unit for purchase to ensure that vibration will be minimized:
High Grade Compressor and Vacuum Pumps – Higher quality pumps are made with greater precision and the dynamic balancing of the motors and piston will make them run smoother. This smoother operation is the key to beginning with proper construction to eliminate vibration at its source.
Engineered Isolation Mounts – The best way to mount pumps requires not only stable and secure connection to keep the pumps from moving around but also need to eliminate transfer of vibration from the pumps to the chassis. Rubber mounts do a fine job of securing the pump but don’t do very well at absorbing vibration. Improved dynamic spring mounts are higher quality and both secure and eliminate a high percentage of vibration.
Solid and Robust Construction Materials – Units that have poor construction or use flimsy materials will not handle vibration well and will cause problems. A well-built mobile dental unit will be not only be constructed of high-grade components but will have thicker walls and materials. To keep these units lighter yet stronger they should use aluminum or equivalent type of construction. Be cautious of units that are too small or lightweight to properly absorb vibration.
Suction Performance – One of the most difficult design areas for a portable dental system is to recreate the powerful suction desired for dental procedures. It needs to provide high flow with moderate strength to pick up debris, capture water coolant effectively and pull viscous solutions through smaller tubings like the saliva ejector or surgical tips. To effectively work for restorative procedures the system should be able to not only power the high-volume suction but also be able to extract liquid through the saliva ejector simultaneously. When doing comparisons make sure to evaluate the suction strength of both the high volume and saliva ejector handpieces when used together. Doing so will let you know that you have a well-designed mobile dental suction.
Suction Canister and Purging Ability – The suction canister should be sized to allow for a standard day of procedures with normal rinsing during treatment. Generally, a good baseline is that the canister should hold around two to three liters of liquid. The canister should prevent overflowing by shutting off the vacuum when full and should have an indicator light to let staff know the system needs to be emptied.
Another area when consider portable dental equipment for in office use is a hands-free solution to emptying the contents of the suction canister through a pump and discharge hose system. This eliminates the need to have to manually dump and clean the canister. A purge system can be used to discharge directly into a sink basin or a convenient quick disconnect connected to the plumbing drain system. Once empty, the system can be easily rinsed by evacuating clean water and then cleaned overnight by suctioning in enzymatic cleaner that breaks down the proteins in blood and saliva.
Sound Performance – A very common and important question when selecting mobile dental equipment for an office is how loud is it? The reason is that many have heard how loud inexpensive portable dental units and air compressors can be. A well-engineered mobile dental system should be very quiet and operate under 48 decibels measured right next to the system. However, sound can be elusive and decibels doesn’t always truly represent sound and secondarily there is no standardized testing certification that can be used to truly compare brands to the sound levels they list. So, the best way to find out if the mobile system you are looking at would be to hear it in person. If that is not practical then either listen to a video of the system operating or obtain a personal recommendation from someone you trust that has actually heard the systems. Sound quality varies greatly between suppliers of these systems so it is important to dive into this one area in more detail.
Compressed Air and Handpiece Performance – Make sure that the internal air compressor provided can produce enough air flow at the right pressure to operate air driven handpieces properly. Even electrical high speeds use air for cooling and need and need proper air flow.
Don’t be tricked into using horsepower to try and compare models. Unfortunately, horsepower ratings have a wide range of latitude and marketing companies have used the HP rating to trick many consumers into believing one model is more powerful than another. This is often seen in electric hand tools sold in the big box stores. Find out if the system you are evaluating can adequately run common brands of dental handpieces
Aesthetics and Working Easily with the System – Since the system you will be using is in an office it is very important that it look a professional piece of dental equipment that delivers high quality care. Even though it is a portable dental unit, it shouldn’t look like it. Look for systems that have enclosures made of not only quality materials but are finished in a way that look modern with rounded corners and edges. Work surfaces should provide adequate working area and provide an easy to clean and attractive surface. The dental carts should roll easily with high grade casters and tubings and handpieces holders should be modern, rounded and easy to clean.
Electrical Requirements and Testing Lab Approval – Although having powerful separate compressor and vacuum pumps, a well-designed self-contained dental cart should be able to operate from a standard electrical outlet without overloading the circuit even with both pumps running at the same time.
Ensure that the model you select has a UL certification by an approved testing lab. This will give you peace of mind knowing that all the electrical components, wiring, switches are high quality and have been assembled correctly.
Dental Water Supply and Water Line Disinfection – Current requirements are mandating that the water lines in dental delivery units be disinfected to remove the biofilm that can grow inside the small diameter tubings. Tablets and other chemicals can clog or damage dental unit components and require consistent management to ensure that they the removal of biofilm is obtained. An ideal mobile dental system should have a water line disinfection cartridge that can be part of the bottle system so that no daily maintenance is required. Since these cartridges can be expensive, select a system with tandem water supply that gives ample water supply for a full day’s procedures but only requires one cartridge to filter both bottles.
Amalgam Separation – If using your mobile dental system for restorative procedures such as removing old amalgam fillings, the suction system will need the ability to use an amalgam separator. This can require the use of an amalgam separator either in line between prior to the suction canister or that the unit can be purged through one to collect the heavy metals. To meet state and EPA regulations, the amalgam separator must have been tested and approved by a certifying agency. Verify that the mobile model you use provide a certified separator option.
Nitrous Oxide scavenging – In office use of a self-contained dental cart often will require the ability to use the portable dental suction to connect to the nitrous patient mask to scavenge off the excess gas. Check to ensure that the mobile dental system has the optional capability to be used for nitrous exhaust scavenging.
Please visit ASIDental.Com/Portable-Work for additional information on ASI Dental’s line of advanced mobile dental delivery system technology.