The Tibial Tuberosity-Trochlear Groove Distance Can either Increase or Decrease during Adolescent Growth

• Main Authors: Per-Henrik Randsborg (Author), Hasan Banitalebi (Author), Asbjørn Årøen (Author), Truls Straume-Næsheim (Author)
• Format: Book
• Published: MDPI AG, 2024-04-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.3390/children11050504; 2227-9067
• Keywords: patella dislocation; TT-TG measurement; adolescence; growth spurt; Pediatrics; RJ1-570
• Source: Children, Vol 11, Iss 5, p 504 (2024)

Increased Tibial Tuberosity-Trochlear Groove (TT-TG) distance is a risk factor for recurrent lateral patella dislocations (RLPD). Population-based cross-sectional studies on healthy subjects demonstrate that the TT-TG increases gradually during growth until skeletal maturity, but changes in the TT-TG distance during adolescence in patients with RLPD on an individual basis have not been previously investigated. This study aimed to measure changes in TT-TG distance during skeletal maturity. The TT-TG of 13 consecutive patients with open physes (mean age 13 years) with RLPD was measured on MRI at baseline and three years later. The change in TT-TG distance over the three-year period was measured. The mean change in TT-TG distance from the baseline to the three-year follow-up increased overall (2.9 mm, 95% Confidence Interval (CI) 2.1-3.7). However, the TT-TG distance could either increase or decrease during final growth. Our results suggest that the TT-TG distance in patients suffering from RLPD may either decrease or increase individually during the growth spurt. This contradicts the current concept that the TT-TG distance increases gradually during growth.