Clinical Presentation
Elderly patients with comminuted periarticular fractures frequently face challenges in recovery without timely and effective intervention, highlighting the need for innovative approaches like immediate arthroplasty [PMID:24720293].
Management
This biomechanical study [PMID:28606433] compared double-plate osteosynthesis with single plate fixation using a 3D camera system, finding less micromotion with double plating before and after cyclic loading, though overall stability was similar.
During cyclic loading tests, two single plates failed while there were no failures in the double-plate group, suggesting enhanced mechanical reliability [PMID:28606433].
In geriatric patients, immediate arthroplasty offers a viable option for managing periarticular fractures, such as those involving the proximal ulna, when internal fixation is likely to fail due to comminution and osteopenia [PMID:24720293].
Simulated varus deformities of 10 and 15 degrees resulted in statistically significant loss of pronation and total arc of motion compared to intact states, particularly at lower torque values [PMID:23782960].
Valgus deformities of 15 degrees led to significant losses in supination and total motion across all torque levels, indicating critical thresholds for functional impairment [PMID:23782960].
Complications
The study demonstrates significant reductions in both pronation and supination with malunions, underscoring the potential for long-term functional complications [PMID:23782960].
Prognosis & Follow-up
Patients requiring immediate mobilization post-fracture often recover better function with arthroplasty than with methods that fail due to fracture complexity [PMID:24720293].
Key Recommendations
The biomechanical analysis indicates that double plating not only maintains comparable stability but also potentially reduces complications like plate failure [PMID:28606433]. (Evidence: Expert opinion)
References
1 Hackl M, Mayer K, Weber M, Staat M, van Riet R, Burkhart KJ et al.. Plate Osteosynthesis of Proximal Ulna Fractures-A Biomechanical Micromotion Analysis. The Journal of hand surgery 2017. link 2 Schmidt AH, Braman JP, Duwelius PJ, McKee MD. Geriatric trauma: the role of immediate arthroplasty. Instructional course lectures 2014. link 3 Snow BJ, Javidan P, Itamura JM, Lee TQ. The effects of varus or valgus malalignment of proximal ulnar fractures on forearm rotation. Journal of orthopaedic trauma 2014. link