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How to Improve the Efficiency of Air Compressor

Le 12 juillet 2017, 09:10 dans Humeurs 0

Air Compressor is used throughout many modern laundering facilities, and goes unnoticed until there is a problem. A closer look at the air compressors in most laundry facilities reveals many simple opportunities to make quick, high impact changes that will lower power costs and keep air-powered equipment operating reliably. A systematic approach helps uncover the best steps to take based on the current situation.

Depending on the size of the operation, top-performing laundering facilities require a compressor between 5 and 15 horsepower. Air compressor manufacturers rate their equipment based on both the horsepower and air capacity (cfm or l/min). To get an idea of the actual cost to operate an dental air compressor, users are left to interpret the horsepower rating of each compressor model.

For instance, why does one five horsepower compressor cost about a third as much as another? A close examination of the motor nameplate and air capacity of each quickly reveals that the two compressors are not really alike. To obtain the real cost of operation, examining the motor nameplate is a good place to start. The nameplate will reveal the voltage, operating amperes, nominal efficiency and power factor and the service factor of the motor.

Air compressor manufacturers will use what is called the service factor of the electric motor to provide extra power to the air compressor and compensate for pressure drop, wear and high-temperature operation. The service factor is a designed-in overload factor that allows the motor to operate above the nominal nameplate rating.

Depending on the type of air compressor that is appropriate to meet capacity requirements, either a reciprocating (piston) or rotary screw type compressor might be selected. Additionally, lubricated or oil-free (oil-less) compressors might be required. Each compressor type will require maintenance, and the oil-free (oil-less) compressors are a bit more complex than their lubricated counterparts. While maintenance will not have the impact on cost of ownership that power does over the life of the air compressor, it can become quite costly if not attended to per manufacturer’s recommendations.

Typically, manufacturers will offer different levels of equipment based on value and design. A less expensive air compressor will have the same basic technology as its more expensive cousin, but will not have the same quality valves, motor, oil, or other basic components. This helps keep the first cost low. The trade-off is often lower efficiency and shorter life.

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How to Choose X-ray Machine

Le 21 juin 2017, 08:44 dans Humeurs 0

Dental radiography has evolved from film and chemical developers into a highly technical process that involves various types of digital x-ray machines, as well as powerful dental software programs to assist the dentist with image acquisition and diagnostic analysis of the acquired images. When making the decision to purchase x-ray equipment, the doctor needs to research the available options thoroughly, in order to make an informed choice for the “right” machine for your dental practice.

Dental X-rays are one of the most important part of your regular dental treatment. Your dentist uses the specialized imaging technology to look for hidden tooth decay – also called cavities – and can show dental issues such as abscessed teeth, dental tumors, and cysts.

Additionally, your dental X-rays allow your dentist to see the condition of prior dental procedures, such as fillings, crowns, root canals( root canal treatment equipment ), and bridges. And, too, your dentist will be able to look for possible bone loss as a result of periodontal gum disease and find hidden tartar build up.

Your dentist or the dental tech inputs the command for the the portable dental x rays unit to send a X-ray through your teeth and into the sensor, effectively taking a photo of your tooth or teeth. The sensor captures the resulting image and sends it through the wire to the computer. Then your dentist will reposition the sensor and take additional digital X-rays until all of your teeth have been X-rayed.

With digital dental X-rays, your dentist or other dental professional is able to immediately see your teeth and jaw bones. This means that assessment and diagnosis is virtually instantaneous.

When a patient needs x-rays for general checkups to help find decay and other common problems, a full series of dental x-rays may be ordered. This is usually called a full-mouth series, or FMX. A set of bitewing and periapical films will be taken to show the teeth at several angles. This can give the dentist an almost 3D picture of teeth and roots.

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The Developments of Dental Air Polisher

Le 6 juin 2017, 05:24 dans Humeurs 0

First introduced in the 1940s, air polishing has changed noticeably since its inception, thanks mainly to advances in materials science. Compared to polishing with a prophy cup and paste, air polishing eliminates the need for direct tooth contact or pressure against the tooth, along with any discomfort from potential heat generated with prophy cups. This technique also offers more efficient biofilm removal, easier access into pits and fissures, and a less abrasive nature than pumice or prophy pastes.

Air polishing was developed in the early 1970s as a technique for fast and efficient removal of extrinsic stains, plaque and other soft deposits from the teeth. It was designed to replace the prophy cup method and has been shown to save more than 50% of the clinical time spent on this tedious procedure. The technique was widely acclaimed when introduced, but this initial enthusiasm was somewhat tempered when it was found that the early technology resulted in frequent clogging problems with the system and the need for frequent servicing and maintenance.

Air polishing units typically generate a stream of pressurized air, carrying specially graded particles of a mild soluble abrasive, such as sodium bicarbonate. The abrasive is directed, in the presence of a stream of water, at a tooth surface to be cleaned. The mixture of water and powderladed stream occurs on the tooth surface and forms a “slurry” that is responsible for the cleaning action.

Recent developments have brought new options to the market, including glycine, erythritol, calcium sodium phosphosilicate, calcium carbonate, and aluminum trihydroxide (to name a few). It’s not necessary to review each in detail, but it’s important that hygienists are generally educated on the many options now available for use.

In addition to being less restrictive when it comes to pre-existing patient conditions, two powders can now be used safely in subgingival air polishing: erythritol and glycine. Air polishing has traditionally been thought of as a technique for supragingival plaque and stain removal only; but these new options open the door for effective removal of subgingival plaque and biofilm, even in deep periodontal pockets.

Removing the stain with a rubber cup polisher and prophylaxis paste; sonic, ultrasonic scalers; Dental Hand Instruments or the air polisher. Wilkins recommends removing as much stain as possible during root planing with curets. However, in one in-vitro study, air polishing was shown to remove less root structure than a curet in simulated three-month recalls for three years.

Erythritol, while not currently available in the United States, is a sugar alcohol that has been shown to offer less discomfort, decreased treatment times, and reduced bleeding on probing when compared to scaling and root planing. Glycine is a naturally occurring amino acid that is water soluble, with a non-salty taste that patients often describe as a little bit sweet. This powder offers similar benefits to erythritol, and offers an option that’s less abrasive with a particle size approximately four times smaller than sodium bicarbonate.This smaller particle size means that it’s safe for all the same supragingival applications as sodium bicarbonate powders, but also offers the option to treat patients with periodontal infections, peri-implantitis, patients on a sodium-restricted diet, and those who have cosmetic or other restorative work.

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