This is a device for positioning orthodontic brackets to the surface of mal-occluded teeth on dental models or ’set-up models‘ used in lingual and/or labial orthodontic techniques.
The Bracket Positioning Instrument has an Anodized Aluminum base with a Stainless Steel working area plate, stainless steel column, and precision aluminum / stainless steel mechanical parts. The mechanical and electronic instrumentation assembly is adjustable along the vertical axis of the column. This assembly includes height and thickness measuring components plus LCD display for measured data. Both measuring components are adjustable for precise accuracy.
The Bracket Positioning Instrument (BPI) is an instrument for measuring the height of the slots in Orthodontic brackets from the occlusal edges of the teeth on dental models. It can also measure the distance from the slot to the vestibular surface of the teeth, thus being incorporated in the B.E.S.T. system from Dr. Fillion, Paris, France. It consists of an anodized aluminum base, including a stainless cover plate for the working area to reduce possible wear. It has a vertical stainless steel column and 2 main assemblies, which are:
Height Adjustment assembly: The model is placed on a surveyor base and the jaws of the BPI lowered to touch lightly the occlusal surface of the teeth to be bonded. The measurement is returned to zero using the button on the housing and then specific height measurements can be taken from this reference point. The LCD display shows the amount of height change to 0.1 mm, which is more than sufficient accuracy in Orthodontics. The precision accuracy is achieved using rotary encoders and, low backlash mechanical movement plus unique signal conditioning electronics.
Thickness adjustment assembly: On the height assembly is the thickness measurement calipers. These have a sprung ‘jaw’ on one side to receive most commercial orthodontic brackets, and a fixed jaw on the other side which should come into contact with the vestibular surface of the teeth to be measured. A large Knob is a gear wheel connected to rack guide that slides the calipers in and out via a straight movement. Turning the adjustment knob moves the jaws in and out and helps position the bracket accurately at a specific thickness measurement from slot to vestibular surface. The LCD display shows the torque measurement to 0.1mm. The precision accuracy is achieved using rotary encoders and, low backlash mechanical movement plus unique signal conditioning electronics.