15 March 2024: Database Analysis
Evaluating the Internal Anatomy of Maxillary Premolars in an Adult Saudi Subpopulation Using 2 Classifications: A CBCT-Based Retrospective Study
Mubashir Baig Mirza ABCDEFG*DOI: 10.12659/MSM.943455
Med Sci Monit 2024; 30:e943455
Table 5 Bilateral symmetry of maxillary premolars.
| Classification | Maxillary first premolars (MFP) | Maxillary second premolars (MSP) | |||||
|---|---|---|---|---|---|---|---|
| Ahmed | Vertucci | Bilateral scans | S | NS | Bilateral scans | S | NS |
| TN | Type I | 46 | 37 (80.4%) | 9 (19.6%) | 237 | 223 (94.1%) | 14 (5.9%) |
| TN | Type II | 21 | 14 (66.7%) | 7 (33.3%) | 22 | 18 (81.8%) | 4 (18.2%) |
| TN | Type III | 3 | 2 (66.7%) | 1 (33.3%) | 2 | 1 (50%) | 1 (50%) |
| TN | Type IV | 21 | 14 (66.7%) | 7 (33.3%) | 5 | 3 (60%) | 2 (40%) |
| TNBP | 216 | 201 (93%) | 15 (7%) | 51 | 42 (82.4%) | 9 (17.6%) | |
| TN | Type V | 5 | 4 (80%) | 1 (20%) | 2 | 1 (50%) | 1 (50%) |
| TNBP | Type XVI# | 1 | 1 (100%) | 0 | 1 | 1 (100%) | 0 |
| TNMBDBP | Type VIII | 5 | 4 (80%) | 1 (20%) | 2 | 1 (50%) | 1 (50%) |
| 318 | 277 (87.1%) | 41 (12.9%) | 322 | 290 (90%) | 32 (10%) | ||
| S – symmetrical; NS – non-symmetrical; TN – tooth number in FDI system (14.24 for MFP and 15.25 for MSP). Type I, 1 canal from the orifice to the apex represented as TN 1 root with 1 canal according to Ahmed et al. Type II, originates as 2 canals merges and ends as 1 at the apex represented as TN 1 root with 2 canals at the beginning and ending as 1 at the apex according to Ahmed et al. Type III, 1 canal at the orifice divides into 2 along its length and then merges into 1 before exiting the root at the apex represented as TN according to Ahmed showing 1 root with 1 canal, which divides into 2 along its length, then merges into 1 before exiting the apex. Type IV, originates as 2 canals and ends as 2 at the apex represented as TN according to Ahmed et al showing 1 root with 2 root canals and TNBP showing 2 roots with separate canals in each buccal (B) and palatal (P) roots. Type V, originates as 1 canal then divides into 2 along its length and exits the root represented as TN according to Ahmed et al showing 1 root with 1 canal in the coronal third then dividing into 2 before exiting the apex. Type XVI, Sert and Bayirli addition to Vertucci represented as TNBP according to Ahmed et al showing 2 roots with buccal root (B) having 1 canal in the coronal third and then dividing along its length and exiting as 2 while the palatal root (P) having 1 canal throughout its length. Type VIII, originates as 3 and ends as 3 canals at the apex represented as TNMBDBP according to Ahmed et al showing 3 roots with single canals in each mesiobuccal (MB) distobuccal (DB) and palatal (P) roots. | |||||||