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Knee Surgery, Sports Traumatology, Arthroscopy

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02-11-2023 | Magnetic Resonance Imaging | KNEE

Inconsistent repeatability of the Dejour classification of trochlear dysplasia due to the variability of imaging modalities: a systematic review

Authors: Tomas Pineda, David Dejour, ReSurg

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 12/2023

Abstract

Purpose

The purpose of this systematic review was to critically assess the quality of papers that report on the intra- and inter-observer repeatability of the Dejour classification for trochlear dysplasia, and to identify the possible causes for poor repeatability.

Methods

Two authors independently conducted an electronic search (four databases) on 8 February 2023 for studies (English or French) that assessed trochlear dysplasia classifications on imaging of skeletally mature participants. Exclusion criteria were reviews of clinical studies, conference proceedings, or editorials. After title, abstract, and full-text screening, characteristics of eligible studies were tabulated (author, year, journal, study design, cohort characteristics, and intra- and/or inter-observer agreement coefficients). The methodological quality of studies was assessed using the Joanna Briggs Institute (JBI) checklist for analytical cross-sectional studies. Authors analysed three components of the included studies: (1) classifications based on true lateral radiographs and slice imaging; (2) dysplasia graded into Type A vs B vs C vs D and 3) coefficients of intra- and/or inter-observer agreement.

Results

The electronic search returned 3,178 references, and after removal of duplicates and irrelevant studies, ten were eligible for data extraction. A second search (31 July 2023) yielded one additional study. Eight studies did not include lateral radiographs, two studies did not explicitly state if radiographs were true lateral views, and one used true lateral radiographs in isolation. Classification of trochlear dysplasia into A vs B vs C vs D using different imaging modalities resulted in moderate to near-perfect intra-observer agreement, and slight to near-perfect inter-observer agreement. Studies distinguished between moderate and severe dysplasia using a variety of combinations: A vs B/C/D, A/B vs C/D and A/C vs B/D.

Conclusion

This systematic review revealed that the Dejour classification remains the most widely used to assess trochlear dysplasia and that the majority of studies that assessed the reliability of the Dejour classification, reported moderate to near-perfect inter-observer agreement; however, pooling of results for comparison among the included studies was inappropriate due to substantial variation in imaging protocols and non-standardised criteria to distinguish severe from moderate dysplasia.

Level of evidence

Level IV.

Trial registry

The PROSPERO registration number is CRD42023386731.

Available only for authorised users

Ackermann J, Hasler J, Graf DN, Fucentese SF, Vlachopoulos L (2022) The effect of native knee rotation on the tibial-tubercle-trochlear-groove distance in patients with patellar instability: an analysis of MRI and CT measurements. Arch Orthop Trauma Surg 142(11):3149–3155. https://doi.org/10.1007/s00402-021-03947-4CrossRefPubMed

Adhikari K, Kumar Gupta M, Devkota K, Baral P, Koirala S (2021) Magnetic resonance imaging evaluation of Patellofemoral Joint. J Nepal Health Res Counc 19(1):122–126. https://doi.org/10.33314/jnhrc.v19i1.3063CrossRefPubMed

Ambra LF, Galvao P, Mameri ES, Farr J, Gomoll AH (2021) Femoral trochlear geometry in patients with trochlear Dysplasia using MRI Oblique trochlear view. J Knee Surg 34(7):699–704. https://doi.org/10.1055/s-0039-1700839CrossRefPubMed

Botchu R, Obaid H, Rennie WJ (2013) Correlation between trochlear dysplasia and anterior cruciate ligament injury. J Orthop Surg (Hong Kong) 21(2):185–188. https://doi.org/10.1177/230949901302100214CrossRefPubMed

Botchu R, Obaid H, Rennie WJ (2013) Correlation between trochlear dysplasia and the notch index. J Orthop Surg (Hong Kong) 21(3):290–293. https://doi.org/10.1177/230949901302100305CrossRefPubMed

Brady JM, Sullivan JP, Nguyen J, Mintz D, Green DW, Strickland S, Shubin Stein BE (2017) The Tibial tubercle-to-trochlear groove distance Is reliable in the Setting of Trochlear Dysplasia, and superior to the Tibial tubercle-to-posterior cruciate ligament distance when evaluating coronal Malalignment in Patellofemoral instability. Arthroscopy 33(11):2026–2034. https://doi.org/10.1016/j.arthro.2017.06.020CrossRefPubMed

Buhler G, Grehn H, Boehm T, Heinz B (2013) Decision making for surgery in trochlea dysplasia-lateral trochlea tilt! Paper presented at the SGOT Congress, Lausanne 2013:5S-5S

Cerveri P, Baroni G, Confalonieri N, Manzotti A (2016) Patient-specific modeling of the trochlear morphologic anomalies by means of hyperbolic paraboloids. Comput Assist Surg (Abingdon) 21(1):29–38. https://doi.org/10.1080/24699322.2016.1178330CrossRefPubMed

Cerveri P, Belfatto A, Baroni G, Manzotti A (2018) Stacked sparse autoencoder networks and statistical shape models for automatic staging of distal femur trochlear dysplasia. Int J Med Robot 14(6):e1947. https://doi.org/10.1002/rcs.1947CrossRefPubMed

10.

Cerveri P, Belfatto A, Manzotti A (2019) Representative 3D shape of the distal femur, modes of variation and relationship with abnormality of the trochlear region. J Biomech 94:67–74. https://doi.org/10.1016/j.jbiomech.2019.07.008CrossRefPubMed

11.

Chen S, Du Z, Yan M, Yue B, Wang Y (2017) Morphological classification of the femoral trochlear groove based on a quantitative measurement of computed tomographic models. Knee Surg Sports Traumatol Arthrosc 25(10):3163–3170. https://doi.org/10.1007/s00167-016-4236-5CrossRefPubMed

12.

Chen SR, An YY, Zhan Y, Qu J, Lei XW (2019) Quantitative evaluation of the relationship between femoral trochlear dysplasia and the degeneration of the patellofemoral cartilage by using T2mapping. Zhonghua Yi Xue Za Zhi 99(21):1651–1655. https://doi.org/10.3760/cma.j.issn.0376-2491.2019.21.012CrossRefPubMed

13.

Cho KJ, Muller JH, Erasmus PJ, DeJour D, Scheffer C (2014) Application of an artificial neural network and morphing techniques in the redesign of dysplastic trochlea. Acta Bioeng Biomech 16(2):75–84PubMed

14.

Davies AP, Costa ML, Shepstone L, Glasgow MM, Donell S (2000) The sulcus angle and malalignment of the extensor mechanism of the knee. J Bone Joint Surg Br 82(8):1162–1166. https://doi.org/10.1302/0301-620x.82b8.10833CrossRefPubMed

15.

Davis JR, Yurgil JL, Van Geertruyden PH, Jex JW, Ahmed SI, Beydoun HA, Clark P (2021) Radiographic clues to the unstable knee: are findings of trochlear dysplasia on lateral knee radiographs reliable and predictive of patellar dislocation? Emerg Radiol 28(6):1143–1150. https://doi.org/10.1007/s10140-021-01968-5CrossRefPubMed

16.

Dejour D, Reynaud P, Lecoultre BJMeh (1998) Douleurs et instabilité rotulienne. Essai de classification. 56 (2217): 1466-1471

17.

Dejour DH, Deroche É (2022) Trochleoplasty: Indications in patellar dislocation with high-grade dysplasia. Surg Tech Orthop Traumatol Surg Res 108(1s):103160. https://doi.org/10.1016/j.otsr.2021.103160CrossRef

18.

Dejour DH, Mesnard G, Giovannetti de Sanctis E (2021) Updated treatment guidelines for patellar instability: “un menu à la carte.” J Exp Orthop 8(1):109. https://doi.org/10.1186/s40634-021-00430-2CrossRefPubMedPubMedCentral

19.

Dejour H, Walch G, Neyret P, Adeleine P (1990) Dysplasia of the femoral trochlea. Rev Chir Orthop Reparatrice Appar Mot 76(1):45–54PubMed

20.

Dejour H, Walch G, Nove-Josserand L, Guier C (1994) Factors of patellar instability: an anatomic radiographic study. Knee Surg Sports Traumatol Arthrosc 2(1):19–26. https://doi.org/10.1007/bf01552649CrossRefPubMed

21.

Delgado-Martinez AD, Rodriguez-Merchan EC, Ballesteros R, Luna JD (2000) Reproducibility of patellofemoral CT scan measurements. Int Orthop 24(1):5–8. https://doi.org/10.1007/s002640050002CrossRefPubMedPubMedCentral

22.

Dong Z, Niu Y, Duan G, Song Y, Qi J, Wang F (2018) Evaluation of trochlear dysplasia severity using trochlear angle: a retrospective study based on computed tomography (CT) scans. Med Sci Monit 24:5118–5122. https://doi.org/10.12659/MSM.908102CrossRefPubMedPubMedCentral

23.

Dornacher D, Reichel H, Lippacher S (2014) Measurement of tibial tuberosity-trochlear groove distance: evaluation of inter- and intraobserver correlation dependent on the severity of trochlear dysplasia. Knee Surg Sports Traumatol Arthrosc 22(10):2382–2387. https://doi.org/10.1007/s00167-014-3083-5CrossRefPubMed

24.

Dornacher D, Trubrich A, Guelke J, Reichel H, Kappe T (2017) Evaluation of a modified knee rotation angle in MRI scans with and without trochlear dysplasia: a parameter independent of knee size and trochlear morphology. Knee Surg Sports Traumatol Arthrosc 25(8):2447–2452. https://doi.org/10.1007/s00167-015-3919-7CrossRefPubMed

25.

Drez D, Jr. (2013) Radiographic determination of trochlear dysplasia. Am J Sports Med 41 (8): NP39. https://doi.org/10.1177/0363546513498205

26.

Escala JS, Mellado JM, Olona M, Giné J, Saurí A, Neyret P (2006) Objective patellar instability: MR-based quantitative assessment of potentially associated anatomical features. Knee Surg Sports Traumatol Arthrosc 14(3):264–272. https://doi.org/10.1007/s00167-005-0668-zCrossRefPubMed

27.

Falkowski AL, Camathias C, Jacobson JA, Magerkurth O (2017) Increased magnetic resonance imaging signal of the lateral patellar facet cartilage: a functional marker for patellar instability? Am J Sports Med 45(10):2276–2283. https://doi.org/10.1177/0363546517705634CrossRefPubMed

28.

Ferlic PW, Runer A, Seeber C, Thoni M, Spicher A, Liebensteiner MC (2021) Linear anterior-posterior computed tomography parameters used to quantify trochlear dysplasia are more reliable than angular measurements. Arthroscopy 37(4):1204–1211. https://doi.org/10.1016/j.arthro.2020.11.032CrossRefPubMed

29.

Friedman MV, Hillen TJ, Misra S, Hildebolt CF, Rubin DA (2020) Quantitative variable assessment of patellar instability: An MRI-based study. AJR Am J Roentgenol 215(5):1163–1170. https://doi.org/10.2214/AJR.19.22556CrossRefPubMed

30.

Fritz B, Fucentese SF, Zimmermann SM, Tscholl PM, Sutter R, Pfirrmann CWA (2020) 3D-printed anatomic models of the knee for evaluation of patellofemoral dysplasia in comparison to standard radiographs and computed tomography. Eur J Radiol 127:109011. https://doi.org/10.1016/j.ejrad.2020.109011CrossRefPubMed

31.

Fuchs A, Feucht MJ, Dickschas J, Frings J, Siegel M, Yilmaz T, Schmal H, Izadpanah K (2022) Interobserver reliability is higher for assessments with 3D software-generated models than with conventional MRI images in the classification of trochlear dysplasia. Knee Surg Sports Traumatol Arthrosc 30(5):1654–1660. https://doi.org/10.1007/s00167-021-06697-3CrossRefPubMed

32.

Iyengar KP, Kho J, Azzopardi CA, Haleem S, Ezegbe F, Botchu R (2022) Alteration of patellar tendon morphology in patellofemoral instability (trochlear dysplasia). J Clin Orthop Trauma 26:101786. https://doi.org/10.1016/j.jcot.2022.101786CrossRefPubMedPubMedCentral

33.

Joseph SM, Cheng C, Solomito MJ, Pace JL (2020) Lateral Trochlear inclination angle: measurement via a 2-image technique to reliably characterize and quantify trochlear Dysplasia. Orthop J Sports Med 8(10):2325967120958415. https://doi.org/10.1177/2325967120958415CrossRefPubMedPubMedCentral

34.

Konrads C, Gonser C, Ahmad SS (2020) Reliability of the Oswestry-Bristol Classification for trochlear dysplasia: expanded characteristics. Bone Jt Open 1(7):355–358. https://doi.org/10.1302/2633-1462.17.BJO-2020-0048.R1CrossRefPubMedPubMedCentral

35.

Kurtul Yildiz H, Ekin EE (2016) Patellar malalignment: a new method on knee MRI. Springerplus 5(1):1500. https://doi.org/10.1186/s40064-016-3195-0CrossRefPubMedPubMedCentral

36.

Lippacher S, Dejour D, Elsharkawi M, Dornacher D, Ring C, Dreyhaupt J, Reichel H, Nelitz M (2012) Observer agreement on the Dejour trochlear dysplasia classification: a comparison of true lateral radiographs and axial magnetic resonance images. Am J Sports Med 40(4):837–843. https://doi.org/10.1177/0363546511433028CrossRefPubMed

37.

Luczak SB, Cheng C, Hedgecock JP, Brimacombe M, Pace JL (2022) Patellar height correlates modestly with trochlear Dysplasia: a magnetic resonance imaging analysis. Arthrosc Sports Med Rehabil 4(3):e1031–e1037. https://doi.org/10.1016/j.asmr.2022.02.009CrossRefPubMedPubMedCentral

38.

Mehl J, Feucht MJ, Bode G, Dovi-Akue D, Sudkamp NP, Niemeyer P (2016) Association between patellar cartilage defects and patellofemoral geometry: a matched-pair MRI comparison of patients with and without isolated patellar cartilage defects. Knee Surg Sports Traumatol Arthrosc 24(3):838–846. https://doi.org/10.1007/s00167-014-3385-7CrossRefPubMed

39.

Mousinho R, Ribeiro JNA, Pedrosa FKS, Lima DA, Goncalves RK, Leite JAD (2019) Evaluation of the reproducibility of the Dejour classification for femoropatellar instability. Rev Bras Ortop (Sao Paulo) 54(2):171–177. https://doi.org/10.1016/j.rbo.2017.11.003CrossRefPubMed

40.

Munch J, Sullivan J, Nguyen J, Hillman A, Mintz D, Green D, Strickland S, Stein BS (2015) MRI measurements associated with patellofemoral instability. Arthroscopy 31(6):e26. https://doi.org/10.1016/j.arthro.2015.04.069CrossRef

41.

Nacey NC, Fox MG, Luce BN, Boatman DM, Diduch DR (2020) Assessing femoral trochlear morphologic features on cross-sectional imaging before trochleoplasty: Dejour classification versus quantitative measurement. AJR Am J Roentgenol 215(2):458–464. https://doi.org/10.2214/AJR.19.22400CrossRefPubMed

42.

Nelitz M, Lippacher S (2014) Arthroscopic evaluation of trochlear dysplasia as an aid in decision making for the treatment of patellofemoral instability. Knee Surg Sports Traumatol Arthrosc 22(11):2788–2794. https://doi.org/10.1007/s00167-013-2586-9CrossRefPubMed

43.

Nelitz M, Lippacher S, Reichel H, Dornacher D (2014) Evaluation of trochlear dysplasia using MRI: correlation between the classification system of Dejour and objective parameters of trochlear dysplasia. Knee Surg Sports Traumatol Arthrosc 22(1):120–127. https://doi.org/10.1007/s00167-012-2321-yCrossRefPubMed

44.

Nha K, Nam YJ, Shin MJ, Sun SD, Park JY, Debnath R, Lee BH (2019) Referencing the trochlear groove based on three-dimensional computed tomography imaging improves the reliability of the measurement of the tibial tuberosity-trochlear groove distance in patients with higher grades of trochlea dysplasia. Knee 26(6):1429–1436. https://doi.org/10.1016/j.knee.2019.05.001CrossRefPubMed

45.

Onor GI Jr, Yalcin S, Kaar SG, Pace JL, Ferrua P, Farrow LD (2021) The evaluation of trochlear osseous morphology: an epidemiologic study. Orthop J Sports Med 9(4):2325967121994548. https://doi.org/10.1177/2325967121994548CrossRefPubMedPubMedCentral

46.

Rajakulasingam R, Murphy J, Bache CE, James SL, Botchu R (2020) Is acetabular morphology related to trochlear dysplasia? J Clin Orthop Trauma 11(Suppl 1):S82–S85. https://doi.org/10.1016/j.jcot.2019.06.010CrossRefPubMed

47.

Remy F, Besson A, Migaud H, Cotten A, Gougeon F, Duquennoy A (1998) Reliability of radiographic criteria for trochlear dysplasia: intra-and interobserver analysis on 68 knees. Rev Chir Orthop Reparatrice Appar Mot 84(8):728–733PubMed

48.

Remy F, Chantelot C, Fontaine C, Demondion X, Migaud H, Gougeon F (1998) Inter- and intraobserver reproducibility in radiographic diagnosis and classification of femoral trochlear dysplasia. Surg Radiol Anat 20(4):285–289. https://doi.org/10.1007/BF01628492CrossRefPubMed

49.

Rémy F, Gougeon F, Eddine TA, Migaud H, Fontaine C, Duquennoy A (2002) Reproducibility of the new classification of femoral trochlea dysplasia proposed by Dejour: predictive value for severity of femoropatellar instability in 47 knees. Orthopaedic Proceedings 84-B (SUPP_I):43–43. doi:https://doi.org/10.1302/0301-620x.84bsupp_i.0840043

50.

Roy KD, Joshi P, Ali I, Shenoy PM, Malek I, Barlow D, Syed A, Joshi Y (2023) A comparative analysis of interobserver reliability and intraobserver reproducibility of the Oswestry-Bristol classification and the Dejour classification for trochlear dysplasia of the knee. Bone Joint Open 4(7):532–538. https://doi.org/10.1302/2633-1462.47.Bjo-2023-0048CrossRefPubMedPubMedCentral

51.

Sales-Fernandez R, Shah N (2023) The pathologic double contour sign and the trochlea shape patterns can diagnose trochlea dysplasia. J ISAKOS 8(2):74–80. https://doi.org/10.1016/j.jisako.2022.11.006CrossRefPubMed

52.

Salzmann GM, Weber TS, Spang JT, Imhoff AB, Schottle PB (2010) Comparison of native axial radiographs with axial MR imaging for determination of the trochlear morphology in patients with trochlear dysplasia. Arch Orthop Trauma Surg 130(3):335–340. https://doi.org/10.1007/s00402-009-0912-yCrossRefPubMed

53.

Sharma N, Brown A, Bouras T, Kuiper J, Eldridge J, Barnett A (2020) The Oswestry-Bristol classification: a new classification system for trochlear Dysplasia. Knee 27:S1–S2. https://doi.org/10.1016/j.knee.2020.07.008CrossRef

54.

Sharma N, Brown A, Bouras T, Kuiper JH, Eldridge J, Barnett A (2020) The Oswestry-Bristol Classification. Bone Joint J 102-b (1):102–107. doi:https://doi.org/10.1302/0301-620x.102b1.Bjj-2019-0366.R3

55.

Shen J, Qin L, Yao WW, Li M (2017) The significance of magnetic resonance imaging in severe femoral trochlear dysplasia assessment. Exp Ther Med 14(6):5438–5444. https://doi.org/10.3892/etm.2017.5217CrossRefPubMedPubMedCentral

56.

Skelley N, Friedman M, McGinnis M, Smith C, Hillen T, Matava M (2015) Inter- and intraobserver reliability in the MRI measurement of the tibial tubercle-trochlear groove distance and trochlea dysplasia. Am J Sports Med 43(4):873–878. https://doi.org/10.1177/0363546514565768CrossRefPubMed

57.

Su P, Liu X, Jian N, Li J, Fu W (2021) Clinical outcomes and predictive factors for failure with MPFL reconstruction combined with tibial tubercle osteotomy and lateral retinacular release for recurrent patellar instability. BMC Musculoskelet Disord 22(1):632. https://doi.org/10.1186/s12891-021-04508-xCrossRefPubMedPubMedCentral

58.

Tscholl PM, Wanivenhaus F, Fucentese SF (2017) Conventional radiographs and magnetic resonance imaging for the analysis of trochlear Dysplasia: the influence of selected levels on magnetic resonance imaging. Am J Sports Med 45(5):1059–1065. https://doi.org/10.1177/0363546516685054CrossRefPubMed

59.

Ülkü TK, Haklar U, Canbora MK (2011) A New Practical Evaluation of Trochlear Dysplasia on MRI. Arthroscopy: The Journal of Arthroscopic and Related Surgery 27 (10): e139-e140. https://doi.org/10.1016/j.arthro.2011.08.108

60.

Van Haver A, Mahieu P, Claessens T, Li H, Pattyn C, Verdonk P, Audenaert EA (2014) A statistical shape model of trochlear dysplasia of the knee. Knee 21(2):518–523. https://doi.org/10.1016/j.knee.2013.11.016CrossRefPubMed

61.

Voss A, Shin SR, Murakami AM, Cote MP, Achtnich A, Herbst E, Schepsis AA, Edgar C (2017) Objective quantification of trochlear dysplasia: assessment of the difference in morphology between control and chronic patellofemoral instability patients. Knee 24(5):1247–1255. https://doi.org/10.1016/j.knee.2017.05.024CrossRefPubMed

62.

Wallace BC, Small K, Brodley CE, Lau J, Trikalinos TA (2012) Deploying an interactive machine learning system in an evidence-based practice center: abstrackr. Paper presented at the Proceedings of the 2nd ACM SIGHIT international health informatics symposium, 2012. pp 819–824

63.

Yalçin S, Onor G, Kaar S, Pace l, Ferrua P, Farrow L (2020) The Evaluation of Trochlear Osseous Morphology: An Epidemiologic Study. Orthopaedic Journal of Sports Medicine 8 (7_suppl6):2325967120S2325900441

64.

Yamada Y, Toritsuka Y, Horibe S, Nakamura N, Sugamoto K, Yoshikawa H, Shino K (2019) Classification of dysplasia of the femoral trochlea in patients with patellar instability depends on the evaluation plane. Journal of ISAKOS 4(6):290–295. https://doi.org/10.1136/jisakos-2019-000291CrossRef

65.

Yang G, Dai Y, Dong C, Niu Y, Kang H, Wang F (2023) Two-type classification system for femoral trochlear dysplasia in recurrent patellar instability based on three-dimensional morphology. Knee Surg Sports Traumatol Arthrosc 31(5):1790–1797. https://doi.org/10.1007/s00167-022-07077-1CrossRefPubMed

66.

Ye Q, Yu T, Wu Y, Ding X, Gong X (2019) Patellar instability: the reliability of magnetic resonance imaging measurement parameters. BMC Musculoskelet Disord 20(1):317. https://doi.org/10.1186/s12891-019-2697-7CrossRefPubMedPubMedCentral

67.

Yi M, Hong SH, Choi JY, Yoo HJ, Kang Y, Park J, Kang HS (2015) Femoral trochlear groove Morphometry assessed on oblique coronal MR images. AJR Am J Roentgenol 205(6):1260–1268. https://doi.org/10.2214/AJR.15.14398CrossRefPubMed

68.

Yigman GT, Toprak H (2022) Coexistence of trochlear Dysplasia and anterior cruciate ligament mucoid degeneration and relationship between dysplasia degree and mucoid degeneration. Acad Radiol 29(5):685–688. https://doi.org/10.1016/j.acra.2020.07.007CrossRefPubMed

69.

Yu KE, Cooperman DR, Schneble CA, McLaughlin W, Beitler B, Kaliney R, Wang A, Fulkerson JP (2022) Reconceptualization of trochlear dysplasia in patients with recurrent patellar dislocation using 3-Dimensional models. Orthop J Sports Med 10(11):23259671221138256. https://doi.org/10.1177/23259671221138257CrossRefPubMedPubMedCentral

70.

Zhao Z, Wang Y, Li J, Wang H, Bai X, Wang Q, Li Z (2021) Clinical outcomes and prognostic factors in patients with recurrent patellar lateral dislocation treated with isolated medial Patellofemoral ligament reconstruction: a retrospective single-center analysis. Orthop J Sports Med 9(4):2325967121995803. https://doi.org/10.1177/2325967121995803CrossRefPubMedPubMedCentral

71.

Zhou Y, Huang W, Wang J (2021) Imaging analysis of the correlation between tibial tuberosity-trochlea groove distance and femoral trochlea morphology. CJTER 25(27):4390. https://doi.org/10.12307/2021.202CrossRef

Title: Inconsistent repeatability of the Dejour classification of trochlear dysplasia due to the variability of imaging modalities: a systematic review
Authors: Tomas Pineda
David Dejour
ReSurg
Publication date: 02-11-2023
Publisher: Springer Berlin Heidelberg
Keywords: Magnetic Resonance Imaging
Magnetic Resonance Imaging
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 12/2023
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-023-07612-8

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Inconsistent repeatability of the Dejour classification of trochlear dysplasia due to the variability of imaging modalities: a systematic review

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

Trial registry

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

Trial registry

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