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Trochlear Morphology Development: Study of Normal Pediatric Knee MRIs
- Source :
- J Pediatr Orthop, Orthopaedic Journal of Sports Medicine
- Publication Year :
- 2020
- Publisher :
- Ovid Technologies (Wolters Kluwer Health), 2020.
-
Abstract
- Introduction: Trochlear dysplasia is a known risk factor for patellar dislocations yet normal trochlea development is not well described. This study will define the articular cartilage and subchondral trochlear morphology development in pediatric patients using MRI evaluation. Methods: Retrospective knee MRI review including patients aged 3-16 years with non-patellofemoral related diagnoses. ICD-9/ICD-10 codes identified eligible study patients. Measurements of the trochlea were made based on previously established methods using the axial MRI image just distal to the physis at the deepest portion of the trochlear groove. Three linear (Lateral Trochlear Height (LTH), Medial Trochlear Height (MTH), Central Trochlear Height (CTH)) and three angular (Sulcus Angle (SA), Lateral Trochlear Slope (LTS), Medial Trochlear Slope (MTS)) were made at the Articular Cartilage (AC) and Subchondral Bone (SCB) (Figure 1). Twelve measurements were made independently by two study authors. Interrater reliability was assessed. Trochlea measurements were summarized across age quartiles: 1st (age 5.1 - 8.3y), 2nd (8.3 - 11.5y), 3rd (11.5 - 14.3y), 4th (14.3 - 16.9y). Associations between age and trochlea measures were assessed using linear regression with Huber-White adjusted standard errors. Results: 246 knee MRIs from 230 patients were included in this study. 113 patients (51%) were female while 117 (49%) were male. 116 MRIs (47%) were of the Left knee and 130 (53%) were Right knee. Average patient age was 11.4±3.4 years. Interrater agreement was high (ICC values >0.7). Mean values for measurements are presented by age quartiles (Table 1). LTH, MTH, and CTH showed linear increase with age (range 2 to 2.6 mm per year, p0.05) however LTS and MTS measured at SCB showed significant increases with age (0.6 and 0.9 degrees per year, p0.05) however for MTH, LTH, and CTH, males were found to have a significantly greater growth rate (p
- Subjects :
- Cartilage, Articular
Joint Instability
Male
Trochlear dysplasia
Adolescent
Knee Joint
Intraclass correlation
Patellar Dislocations
Articular cartilage
Article
03 medical and health sciences
0302 clinical medicine
Patient age
Linear regression
medicine
Humans
Orthopedics and Sports Medicine
Growth Plate
Risk factor
Child
Retrospective Studies
Orthodontics
Bone Diseases, Developmental
Sex Characteristics
030222 orthopedics
medicine.diagnostic_test
business.industry
Eligible study
Reproducibility of Results
Magnetic resonance imaging
General Medicine
Sulcus
Magnetic Resonance Imaging
medicine.anatomical_structure
Quartile
Subchondral bone
Child, Preschool
Pediatrics, Perinatology and Child Health
Female
business
Nuclear medicine
Subjects
Details
- ISSN :
- 02716798
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Journal of Pediatric Orthopaedics
- Accession number :
- edsair.doi.dedup.....b6c259d5509a56ef1956f49fd54db1b6