Fig. 1
Fig. 2
Influence of third molars status (non-impacted N-M3 versus impacted I-M3) on prevalence of distal pathologies in adjacent second molars (A-M2) – multivariate logistic regression model
| M3 status | Caries | External root resorption (ERR) | Alveolar bone loss (ABL) | |||
|---|---|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | |
| Maxillary | ||||||
| Absent† | 1 | 1 | 1 | |||
| N-M3 | 1.39 (1.13–1.7) | 0.002* | 0 | 0.99 | 1.15 (0.95–1.37) | 0.14 |
| I-M3 | 0.55 (0.39–0.77) | 0.000* | 21.84 (2.84–168.0) | 0.003* | 1.59 (1.27–1.99) | 0.000* |
| Mandibular | ||||||
| Absent† | 1 | 1 | 1 | |||
| N-M3 | 1.48 (1.2–1.82) | 0.000* | 0.54 (0,03–8.69) | 0.67 | 0.81 (0.64–1.01) | 0.06 |
| I-M3 | 0.89 (0.69–1.18) | 0.43 | 28.1 (3.75–211.0) | 0.001* | 3.51 (2.8–4.4) | 0.000* |
| Maxillary+ | ||||||
| Mandibular | ||||||
| Absent† | 1 | 1 | 1 | |||
| N-M3 | 1.42 (1.23–1.65) | 0.000* | 0.28 (0.03–3.08) | 0.3 | 1.00 (0.99–1.01) | 0.9 |
| I-M3 | 0.77 (0.63–0.95) | 0.013* | 26.0 (6.2–108.3) | 0.000* | 2.36 (2.01–2.76) | 0.000* |
Influence of third molars status (partially versus completely impacted I-M3) on prevalence of distal pathologies in adjacent second molars (A-M2) – multivariate logistic regression model
| M3 status | Caries | External root resorption (ERR) | Alveolar bone loss (ABL) | |||
|---|---|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | |
| Maxillary | ||||||
| Absent† | 1 | 1 | 1 | |||
| Partially I-M3 | 1.04 (0.72–1.48) | 0.000* | 26.3 (3.1–222.5) | 0.003* | 3.15 (2.4–4.1) | 0.000* |
| Completely I-M3 | 0.07 (0.02–0.22) | 0.84 | 24.2 (2.92–200.6) | 0.03* | 0.52 (0.35–0.77) | 0.000* |
| Mandibular | ||||||
| Absent† | 1 | 1 | 1 | |||
| Partially I-M3 | 1.23 (0.93–1.63) | 0.000* | 14 (1.71–113.9) | 0.01* | 3.85 (3.03–4.91) | 0.000* |
| Completely I-M3 | 0.22 (0.12–0.42) | 0.15 | 59.4 (7.64–461.3) | 0.000* | 2.95 (2.1–4.16) | 0.000* |
| Maxillary+ | ||||||
| Mandibular | ||||||
| Absent† | 1 | 1 | 1 | |||
| Partially I-M3 | 1.21 (0.98–1.5) | 0.000* | 18.7 (4.2–83.2) | 0.000* | 3.28 (2.76–3.9) | 0.000* |
| Completely I-M3 | 0.16 (0.09–0.27) | 0.08 | 38.27 (8.68–168.8) | 0.000* | 1.23 (0.97–1.58) | 0.09 |
Distal pathologies in adjacent second molars (A-M2) in quadrants with non-impacted third molars (N-M3) or with impacted third molars (I-M3)
| M3 status | Caries | External root resorption (ERR) | Alveolar bone loss (ABL) |
|---|---|---|---|
| I-M3, n (%) | 186 (12.93) | 35 (2.42) | 510 (35.5) |
| N-M3, n (%) | 765 (19.9) | 1 (0.03) | 758 (19.72) |
Distal pathologies in adjacent second molars (A-M2) in quadrants with or without third molars (M3)
| M3 status | Caries | External root resorption (ERR) | Alveolar bone loss (ABL) |
|---|---|---|---|
| Absent, n (%) | 299 (14.83) | 2 (0.09) | 386 (19.2) |
| Present, n (%) | 951 (17.98) | 36 (0.68) | 1268 (23.96) |
Distal pathologies in adjacent second molars (A-M2) in quadrants with partially impacted third molars (I-M3) or with completely impacted third molars (I-M3)
| M3 status | Caries | External root resorption (ERR) | Alveolar bone loss (ABL) |
|---|---|---|---|
| Partially I-M3, n (%) | 171 (18.69) | 16 (1.75) | 401 (43.82) |
| Completely I-M3, n (%) | 15 (2.81) | 19 (3.57) | 109 (20.49) |
Influence of third molars (M3) on prevalence of distal pathologies in adjacent second molars (A–M2) – multivariate logistic regression model
| M3 status | Caries | External root resorption (ERR) | Alveolar bone loss (ABL) | |||
|---|---|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | |
| Maxillary | ||||||
| Absent† | 1 | 1 | 1 | |||
| Present | 1.17 (0.96–1.43) | 0.13 | 5.43 (0.71–41.6) | 0.1 | 1.24 (1.05–1.47) | 0.01* |
| Mandibular | ||||||
| Absent† | 1 | 1 | 1 | |||
| Present | 1.27 (1.04–1.55) | 0.02* | 8.23 (1.11–61.2) | 0.04* | 1.44 (1.18–1.76) | 0.000* |
| Maxillary+ | ||||||
| Mandibular | ||||||
| Absent† | 1 | 1 | 1 | |||
| Present | 1.23 (1.07–1.42) | 0.04* | 6.97 (1.68–29.0) | 0.01* | 1.31 (1.15–1.49) | 0.000* |