Chair position is a very important aspect in the success of a dental treatment. The correct positioning helps the operator to have a good visibility and accessibility of the oral cavity
If operator maintains proper position and posture during treatment, the operator is less likely to get strain, fatigue, be more efficient and less chances of getting musculoskeletal disorders.
The Universal Seated Position for the Clinician/Operator Forearm parallel to the floor Thighs parallel to the floor Hip angle of 90 degrees Seat height positioned low enough so that the heels of your feet touch the floor When working from clock positions 9-12:00, feet spread apart so that your legs and the chair base form a tripod which creates a stable position Avoid positioning your legs behind the patient’s chair Back of the operator should be always straight Head erect and should not be bent of drooping
Extraction Of Maxillary Teeth The positioning is determined by the need to push in the long axis of the tooth . The operator stands in front and to the right of the patient.
The operator’s legs should be spaced so that it is possible to push hard with the right leg which should be to the rear and straight. The left leg should be forward and slightly bent.
The patient should be tipped back by about 30° so that the surgeon can see directly into the mouth. The height of the chair should be adjusted so that the tooth to be extracted is about at the height of the operator’s elbow. The patient’s head is tipped just far enough to their right that access to the tooth is comfortable.
Extraction Of Mandibular Teeth For teeth in the lower left quadrant, the operator stands much as for maxillary extractions. But the patient can be placed a few inches lower and will be helped if the patient turns slightly toward the operator
For teeth in the lower right quadrant the operator stands behind the patient. D epending on the angulation of the tooth, it is more comfortable to stand on the other side sometimes.
The chair can be tipped further back than for the maxillary teeth maybe as much as 45 ° A nd its height can be a little lower than when standing in front for the left side.
The Supporting Hand The left hand is used to support the jaw and stabilize it during extraction. It also holds soft tissue out of the way to permit good vision For maxillary teeth, the index finger and thumb are placed either side of the alveolus adjacent to the tooth to be extracted
For extractions in the mandible two fingers and the thumb are used. For the lower left this means placing the index and second fingers either side of the alveolus in the mouth and the thumb beneath the mandible. For the lower right use the index finger and thumb inside the mouth and the second finger beneath the jaw, supporting it.