Ultrasonic Insights - Sixth Edition
Ultrasonic Inserts: Power from the Stack!
The tip and the grip of an ultrasonic insert are both essential for effective and efficient power scaling. However the stack is also a vital component that, when maintained properly, can help your inserts perform optimally--and help you perform at your best!
What is the insert stack made of?
The stack is made of very thin leaves of a nickel-based alloy that are stacked on top of each other and fused together at each end.
What is the function of the stack?
When a magnetostrictive unit is activated, electrical energy flows from the handpiece to the stack. The stack expands and contracts lengthwise and, in doing so, transforms the energy into power, resulting in vibration of the tip.
What should the stack look like?
Whether the insert is new or not, the leaves of the stack should all nest together. Hu-Friedy’s insert stacks have a “V” shape to enhance the nesting of the leaves in order to provide more durability during handling and less stack separation. Leaves that are splayed, bent, fractured or detached generally result in less than optimal ultrasonic scaling. In these cases you may experience inadequate power even if the insert tip is not worn or, possibly, the insert tip will not vibrate at all.
What is the best way to keep the insert stack in good condition?
It is beneficial to handle the stack as little as possible. The grip of the insert has been designed to be held in the hand so it is preferable to handle the insert only by the grip. During cleaning and sterilization, ideally, inserts should be placed in an instrument cassette where the outer shell of the cassette will provide superior protection from the weight or intrusion of other instruments. If cassettes are not used, carefully place the insert in the ultrasonic cleaner either alone or in a location where it will not be subject to the weight of other dental instruments. In addition, it is recommended not to stack instrument packs on top of the ultrasonic insert pack in the sterilizer as the combination of heat and weight can cause warping of the stack.
Is it necessary for the handpiece to be completely filled with water prior to placing the insert in?
Yes, it is necessary for handpiece to be completely filled with water when the insert is placed in the handpiece as this will provide total submersion of the stack which helps prevent trapping of air bubbles. If air is trapped, the handpiece may become warm, or even hot; overheating can occur along with possible insert damage. The simple procedure of ensuring the handpiece is completely filled with water prior to insertion of the stack will help maintain the efficiency of the inserts.
What should I do if my insert stacks are bent, broken, splayed or detached?
Inserts with compromised stacks should be taken out of use and replaced as likely they are not providing scaling efficiency or effectiveness. Take advantage of Hu-Friedy’s Ultrasonic Insert Trade in offer by calling Hu-Friedy at 1-800-Hu-Friedy and request the Hu-Friedy Insert Wear Guide where you can receive 1 ultrasonic insert free when you purchase 2 and trade in 3!
