TOPIC: BITEWING RADIOGRAPHY
🌟IMPORTANT POINTS TO REMEMBER
🔹Position of bite: The tab or bite platform should be positioned in the middle of the film packet and parallel to the upper and lower edges of the film packet.
🔹Position of film packet: The film packet should be positioned with its long axis horizontally for horizontal bitewing or vertically for vertical bitewing.
🔹Four sizes of the film are used in the bitewing radiography: size 0, size 1, size 2 and size 3 (27 × 54 mm).
🔹Horizontal angulation: In the horizontal plane, the X-ray tube head should be aimed in such a way that the beam is perpendicular to the teeth and film packet. It should pass through all of the contact areas.
🔹Vertical angulation: Positive 10° angulation should be used in the case of molar bitewing, and positive 5° angulation is used for premolar bitewing.
🔹Point of entry: The central ray should be directed through the occlusal plane of teeth towards the centre of the film packet.
🔹There are mainly three techniques available: simple film packet tab technique, simple film packet with film holder technique and reproducible film packet holder technique.
🔹Anterior bitewing: It may be necessary to take bitewing of anterior teeth to aid diagnosis. Vertical bitewing is taken in case of anterior bitewing.
🔹Vertical bitewing: It is used when the desired area is not seen on the film with normal bitewing placement. Bitewing tab is placed with long portion of the film in a vertical direction.
📌 Indication Of Bitewing Radiography :
🔸Proximal caries: It is very useful in the detection of dental proximal caries.
🔸Progression of dental caries: It helps monitor the progression of dental caries.
🔸Secondary caries or recurrent caries: It is helpful in the detection of secondary caries under restoration.
🔸Periodontal status: It is a very important tool in knowing the height of the alveolar bone and change in the bone.
🔸Calculus: It is used for the detection of calculus deposited in the interproximal areas.
🔸Relationship between the prepared cavity and pulp chamber: It is also useful in checking the relationship between the prepared cavity and pulp chamber.
🔸Overhanging restoration: It can show overhanging margins of restoration.
🔸Mixed dentition: It is also used to see the relationship between deciduous and permanent teeth in children with mixed dentition.
📌 Four sizes of the film are used in the bitewing radiography:
🔹Size 0: It is used to examine posterior teeth in children (22 × 35 mm).
🔹Size 1: It is used to examine posterior teeth in mixed dentition (24 × 40 mm).
🔹Size 2: It is used to examine posterior teeth in adults (32 × 41 mm).
🔹Size 3: It is narrower and longer and used only in case of bitewing radiography.
📌MULTIPLE CHOICE QUESTIONS (MCQs)
💡 Bitewing radiography is used in the determination of
A. Occlusal caries
B. Attrition
C. Proximal caries
D. None of the above
Answer: C
💡 Bite wing radiography is also known as
A. Periapical technique
B. Interproximal technique
C. Coronal technique
D. None of the above
Answer : B
💡 Vertical angulation given for molar bite wing radiography is
A. Positive 5 degree
B. Positive 10 degree
C. Negative 5 degree
D. Negative 10 degree
Answer: B
💡 The point of entry for bitewing radiograph is
A. Occlusal plane
B. Interproximal area
C. Cervical area
D. Midline of interested tooth
Answer: A
💡 Four different sizes of film used in bitewing radiography are
A. Size 1, size 2, size 3, size 4
B. Size 0, size 1, size 2, size 3
C. Size 0, size 1, size 2, size 4
D. None of the above
Answer: B
💡 Which of the following is an advantage of the film packet Holder technique?
A. Simple
B. No displacement of the film packet
C. Cone cut is avoided
D. All of the above
Answer : D