Table 2.
Comparison of Injury Characteristics Between Cohorts
| Overall (N = 33) | Grooveplasty (n = 18) | Trochleoplasty (n = 15) | P Value | |
|---|---|---|---|---|
| Trochlear dysplasia grade (Dejour classification) | .733 | |||
| A | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
| B | 19 (57.6) | 11 (61.1) | 8 (53.3) | |
| C | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
| D | 14 (42.4) | 7 (38.9) | 7 (46.7) | |
| Flexion at patellar reduction, mean (SD), ° | 37.0 (11.6) | 38.0 (4.5) | 36.5 (14.2) | .824 |
| Valgus alignment | 15 (45.5) | 9 (50.0) | 6 (40.0) | .446 |
| Patella alta | 15 (45.5) | 8 (44.4) | 7 (46.7) | >.999 |
| Femoral anteversion | 4 (12.1) | 2 (11.1) | 2 (13.3) | >.999 |
| TT-TG distance, mean (SD), mm | 17.6 (4.1) | 19.3 (3.5) | 15.7 (4.1) | .016∗ |
| ICRS grade | .008∗ | |||
| 0 | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
| 1 | 2 (6.1) | 0 (0.0) | 2 (13.3) | |
| 2 | 12 (36.4) | 4 (22.2) | 8 (53.3) | |
| 3 | 5 (15.2) | 2 (11.1) | 3 (20.0) | |
| 4 | 11 (33.3) | 10 (55.6) | 1 (6.7) | |
| NA | 3 (9.1) | 2 (11.1) | 1 (6.7) | |
| Osteochondral loose body | 12 (37.5) | 10 (58.8) | 2 (13.3) | .012∗ |
| Concomitant procedure | 31 of 33 (93.9) | 18 of 18 (100) | 13 of 15 (86.7) | .478 |
| None | 2 (6.1) | 0 (0.0) | 2 (13.3) | — |
| MPFL | 29 (87.9) | 17 (94.4) | 12 (80.0) | .308 |
| TTO | 18 (54.5) | 14 (77.8) | 4 (26.7) | .005∗ |
| Femoral osteotomy | 7 (21.2) | 6 (33.3) | 1 (6.7) | .095 |
| Cartilage restoration | 12 (36.4) | 10 (55.6) | 2 (13.3) | .027∗ |
| Lateral retinacular lengthening | 24 (73.7) | 12 (66.7) | 12 (80.0) | .458 |
NOTE. Data are presented as number (percentage) unless otherwise indicated.
ICRS, International Cartilage Research Society; MPFL, medial patellofemoral ligament; NA, not available; SD, standard deviation; TT-TG, tibial tubercle–trochlear groove; TTO, tibial tubercle osteotomy.
∗
Statistically significant (P < .05).