What are the different delivery systems for dental care?
The three most commonly-used delivery systems for patient treatment (over-the-patient, rear, and side delivery) are compared below, with photos and some of the advantages and disadvantages of each.
Over-the-Patient Delivery This is the system most used in dental clinics today. This unit design meets the requirements of time and motion concepts and promotes good ergonomic positioning. With the unit over the patient, the assistant can easily retrieve the handpieces and transfer them to the doctor who does not need to remove his or her eyes from the operating site. There are no hoses to interfere with the assistant’s position. This type of unit has been designed for the practice of true four-handed dentistry. Also, if the dentist is working alone the handpieces are easily accessible.
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Rear Delivery The doctor must pick up the handpieces, which requires severe twisting and turning, since the doctor is forced to turn from the operating field to pick up the handpiece. Often it is necessary to transfer the handpiece from the retrieval hand to the operating hand. The units are mounted in a fixed position that cannot be moved to accommodate for the positions of the dentist or for ease of use for the assistant. HVE hosing and air/water syringes are permanently affixed to an assistant’s work area. |
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Side Delivery This unit has been a popular concept for many decades. In fact, most schools use this style of unit, often supplied with a bracket tray. This unit requires the dentist to pick up the handpieces so they must remove their eyes from the treatment site, twist and turn to grasp the instrument, and then refocus. The assistant can’t reach the instruments to exchange handpieces or change burs, reducing productivity that is gained from four handed dentistry.
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