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17 Cards in this Set
- Front
- Back
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% lower 1st molar to show distal canal |
30% |
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Enigma to endodontist |
Mandibular 1st premolar Bifurcations and trifurcations are very common |
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Variations seen in pulp canal |
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Occurrence of more than 1 root |
Mandi 4> maxi 4> mandi 3> maxi 3 |
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Accessory canals are common in |
Apical 1/3 of root |
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Pulp anatomy of Mandi 1st molar |
1. No. Of roots = 2
2. No. Of canals = 3 (mesiobuccal , mesiolingual , distal)
3. Mesiobuccal orifice- under mesiobuccal cusp Explored- mesiobuccoapical inclination
4. Mesiolingual orifice- below central groove. Explored- distobuccal direction
5. Distal orifice- buccolingual centre of the tooth. Explored- mesial direction. 6. Access opening- usually trapezoidal Maybe rectangular |
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Maxi 1st molar |
1. 3 roots 2. 3 canals (rarely 4)- palatal, mesiobuccal, distobuccal |
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Perforations |
Mandibular 1 > maxillary 4(mesiodistally narrow) |
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Incidence of 3rd root in upper first premolar |
6% |
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Incidence of distal root with 2 canals in mandibular molar |
30% |
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Dens in dente in maxi 2 |
0.04%-10% |
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MB2 prevalence |
95.2% |
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2 canals in mandibular 1 |
20%-41.4% |
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Access preparation in mandi 4 |
Lingually held bur Floor is NOT kept perpendicular to long axis of tooth. |
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Bifurcation in single rooted teeth |
Mandi 4> mandi 3 > mandi 1>= mandi 2> maxi 4,3 Least common in maxi 1,2 |
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C- shaped canals |
Fusion of mesial and distal root in either lingual or buccal region. Category 1- continuous c shaped canal Category 2- semicolon shaped Category 3 - C shaped orifice with distinct canals Mandi 7 >6> 8> maxi 7>6>8>mandi45> maxi 2 |
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How to detect undetected canals |
1. Dark line parallel to file- Follow the image of test file in the length of the tooth film , particularly in coronal part of root, if an extra black line running parallel to the instrument - suggestive of additional canal. 2. Fast break - If there is sudden change in radiolucency within canal |
