Department of Orthopaedic Surgery, Louisiana State University Health Sciences Center, Shreveport, LA, USA.
Department of Orthopaedic Surgery, Tulane University, New Orleans, LA, USA.
Cartilage. 2024 Dec;15(4):471-476. doi: 10.1177/19476035231206258. Epub 2023 Oct 16.
After traumatic knee injuries, chondral fragments can avulse off bone with the progeny fragment becoming a loose body. The loose fragment may be larger than expected when trying to surgically repair the fragment back to its original site. The purpose of this study was to determine whether a loose chondral fragment from the lateral femur condyle would increase in size and weight after soaking in normal saline (NS) for 14 days.
Twelve 6-mm OAT (osteoarticular transfer) plugs were harvested from 6 cadaver knees on the lateral femoral condyle to simulate a chondral fragment. The chondral fragments were then placed inside an airtight specimen container with NS (0.9% sodium chloride) and were measured over 14 days.
After 14 days, the chondral fragments showed no increase in diameter as they measured an average of 5.567 ± 0.448 mm on Day 1 and 5.702 ± 0.253 mm on Day 14 ( = 0.183). The chondral fragments showed an increase in mass from an average of 0.058 ± 0.012 g on Day 1 to 0.073 ± 0.012 g on Day 14 ( < 0.001) and an increase in thickness from an average of 2.038 ± 0.346 mm on Day 1 to 2.229 ± 0.297 mm on Day 14 ( = 0.033).
Chondral fragments in NS increase in mass and thickness over time, but do not change in diameter. When surgeons are evaluating loose chondral fragments for fixation, they should consider that these fragments may appear thicker than the recipient location.
创伤性膝关节损伤后，软骨碎片可随其后代碎片从骨上撕脱，成为游离体。当试图将碎片手术修复回其原始位置时，游离体可能比预期的更大。本研究旨在确定外侧股骨髁的游离软骨碎片在浸泡于生理盐水（NS）中 14 天后是否会增大和增重。
从 6 个尸体膝关节的外侧股骨髁采集 12 个 6mm 的 OAT（关节骨转移）塞，以模拟软骨碎片。然后将软骨碎片放入密封的标本容器中，内装 NS（0.9%氯化钠），并在 14 天内进行测量。
14 天后，软骨碎片的直径没有增加，因为它们在第 1 天的平均直径为 5.567±0.448mm，在第 14 天的平均直径为 5.702±0.253mm（ = 0.183）。软骨碎片的质量从第 1 天的平均 0.058±0.012g 增加到第 14 天的 0.073±0.012g（ < 0.001），厚度从第 1 天的平均 2.038±0.346mm 增加到第 14 天的 2.229±0.297mm（ = 0.033）。
NS 中的软骨碎片随时间推移会增加质量和厚度，但直径不变。当外科医生评估游离软骨碎片以进行固定时，他们应考虑到这些碎片可能比接受部位更厚。
