📌 POINTS TO PONDER
✴️ Major difference between standard pen grasp and modified pen grasp:
🔹 In standard pen grasp, the side of the pad of middle finger rests on the shank while in modified pen grasp, the pad of middle finger rests on the shank.
🔹Exploratory stroke is a light feeling stroke.
🔹Scaling stroke is a short, powerful pull stroke.
🔹 Root planing stroke is a long moderate -to-light pull stroke.
📣 CONDITION OF THE INSTRUMENTS
Steps in the effective care of instruments:
🔸Instruments are cleaned after each use by removing blood and debris under running water.
🔸The instruments are sharpen regularly and sharpness is checked thereafter.
🔸 Instruments are sterilized thoroughly.
📌 VIVA VOCE
Q1. What should be the distance from the patient’s mouth to the eyes of the clinician during dental treatment?
Ans. The distance from the patient’s mouth to the eyes of the clinician during dental treatment is 14–16 inches.
Q2. What is the major difference between standard pen grasp and modified pen grasp?
Ans. In standard pen grasp, the side of middle finger rests on the shank while in modified pen grasps, the pad of middle finger rests on the shank.
Q3. Where is palm and thumb grasp used?
Ans. Palm and thumb grasp is used for:
- Stabilizing instruments during sharpening.
- Manipulating air and water syringes.
- Manipulating porte polisher.
Q4. What is instrumentation zone?
Ans. Scaling and root planing strokes is confined to the portion of the tooth where calculus or altered cementum is found, this zone is called as instrumentation zone.
Q5. What is the optimal blade angulation for subgingival insertion of instrument, scaling and root planing and gingival curettage?
Ans. The optimal blade angulation for:
- Subgingival insertion of instrument: 0°.
- Scaling and root planing: 45–90°.
- Gingival curettage: More than 90°.
Q6. In which position of the chair, patients with cardiac and respiratory disease should be treated.
Ans. Semi-upright position.
Q7. What is Trendelenburg position?
Ans. It is modified supine position when the head is lower than the heart. The brain is lower than heart and feet slightly elevated.
Q8. When periodontal instrument should be sharpened?
Ans. At the first sign of dullness.
Q9. What is acrylic stick test?
Ans. Tactile evaluation of sharpness is performed by drawing the instrument lightly across an acrylic rod and evaluating the bite. A dull instrument will slide smoothly, but sharp instrument will bite into the surface, raising a light shaving.
Q10. What is walking stroke?
Ans. Walking stroke is the movement of a calibrated probe around the perimeter of the base of a sulcus or pocket. Walking strokes are used to cover the entire circumference of the sulcus or pocket base.
📌 MULTIPLE CHOICE QUESTIONS MCQs
💡The most common instrument grasp used is:
A. Inverted pen grasp
B. Standard pen grasp
C. Modified pen grasp
D. Palm and thumb
Answer : C
💡Correct tooth- blade angulation for curettage is:
A. 0°
B. 45° – 90°
C. Less than 45°
D. More than 90°
Answer : D
💡The difference in shank lengths of Gracey and after five curettes is:
A. 1 mm
B. 2 mm
C. 3 mm
D. 4 mm
Answer : C
💡Aerosols are produced by:
A. Ultrasonic scaler
B. Sonic scaler
C. Both of the above
D. None of the above
Answer : C
💡 The palm and thumb grasp on an instrument:
A. Is used for removing heavy calculus
B. Increases maneuverability of the instrument
C. Is used for stabilizing instrument while sharpening
D. Enhances sensitivity of the instrument
Answer : C
💡 A scaling stroke is a:
A. Long, powerful pull stroke
B. Short, moderate to light pull stroke
C. Long, moderate to light pull stroke
D. Short, powerful pull stroke
Answer : D
💡 In the modified pen grasp, the second finger is positioned with the:
A. Finger pad on the instrument handle, across from the thumb
B. Side of the finger resting on a tooth
C. Finger pad on the instrument shank
D. Side of the finger against the instrument shank
E. Finger pad resting on the back of the working end
Answer : C