The following canals may be found in an upper molar:
- 1. Mesio-buccal.
- 2. Disto-buccal.
- 3. Mesio-palatal.
- 4. Disto-lingual.
- 5. Palatal.
- A) 1+2+4.
- B) 1+2+4+5.
- C) 2+3+4+5.
- D) 1+2+3+5.
The correct answer is d) 1+2+3+5.
Upper molars typically have four canals:
- Mesio-buccal (MB):
Located on the cheek side, closer to the front of the tooth.
- Disto-buccal (DB):
Located on the cheek side, closer to the back of the tooth.
- Mesio-palatal (MP):
Located on the tongue side, closer to the front of the tooth.
- Palatal (P):
Located on the tongue side, single canal running towards the center of the tooth.
Therefore, options a, b, and c include canals not typically found in upper molars.
Breakdown of the Options:
Here's a breakdown of the options:
- A) 1+2+4: Excludes the palatal canal (P).
- B) 1+2+4+5: Includes the disto-lingual canal (DL), which is not present in upper molars.
- C) 2+3+4+5: Excludes the mesio-buccal canal (MB).
- D) 1+2+3+5: Includes all four canals typically found in upper molars - mesio-buccal, disto-buccal, mesio-palatal, and palatal.
