Key result
Early patella reduction significantly improved patella morphology in growing rabbits, resulting in a smaller transverse diameter (6.35 mm vs 7.86 mm) and Wiberg angle compared to the non-reduced group at 5 months.
Why the study?
The influence of early patella reduction on patellar development remains unclear.
Does early patella reduction improve patella morphology in growing rabbits with patellar instability?
Does early patella reduction improve patella morphology in growing rabbits with patellar instability?
Early patella reduction can improve patella morphology and prevent patella-shaped disorders in a growing rabbit model of patellar instability.
Early patellar reduction may improve morphology in rabbit models; leaves open translation to pediatric patellar instability.
Background: Patella-shaped disorder has been considered as a predisposing factor for patellar instability. But the influence of early patella reduction for patellar development remains unclear. This study aimed to evaluate whether early operation in patella instability could improve patella morphology in growing rabbits.Methods: Fifty rabbits (1-month-old) were were included in the study. The control group underwent no surgical procedures. The two experimental groups (reduction group and non-reduced group), underwent medial soft tissue restraint release. The reduction group, rabbits underwent the medial soft tissue sutura surgery in order to stabilize the patella 2 months postoperative. The non-reduced group, rabbits did not undergo suture surgery. Computed Tomography (CT) scans analysis in two experimental endpoints (2, 5 months postoperatively) were selected to evaluate the transverse diameter, thickness, Wiberg index, and Wiberg angle of patella. Gross observation was conducted to assess morphological changes of the patella.Results: CT scans showed significant difference in the mean transverse diameter and Wiberg angle of patella between the two groups after 2 months surgery. 5 months after surgery, the four indices were found no statistically difference in the reduction group versus the control group. However, the transverse diameter, Wiberg angle in the non-reduced group were significantly differences than that in the reduction group (P < 0.05). Gross observation showed a flattened articular surface of the patella in the non-reduced group.Conclusions: The results indicated that patella instability may lead to patella-shaped disorder, showing a flattened morphology. Early patella reduction can improve the patella morphology in growing rabbits.
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Li et al. (2022) studied Patella instability (n=50). Early patella reduction (medial soft tissue sutura) vs. Non-reduced group (no suture surgery) was evaluated on Transverse diameter of the patella at 5 months (p=<0.05). Early patella reduction significantly improved patella morphology in growing rabbits, resulting in a smaller transverse diameter (6.35 mm vs 7.86 mm) and Wiberg angle compared to the non-reduced group at 5 months.
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