Introduction: Olecranon fractures represent approximately 10% of upper limb fractures, orthopedic treatment is often doomed to failure and surgical treatment consists of fixing the fracture sites. Patients and Methods...Introduction: Olecranon fractures represent approximately 10% of upper limb fractures, orthopedic treatment is often doomed to failure and surgical treatment consists of fixing the fracture sites. Patients and Methods: This study retrospectively analyzed 130 patients, 90 men and 40 women, aged on average 48.7 ± 11.9 years (30 to 65) treated between 2018 and 2020 in the Orthopedics and trauma department at the Moulins-Yzeure hospital center, for olecranon fracture using the Medartis H-locked plate. The study aimed to evaluate the results of this surgical method, particularly with regard to postoperative complications. Results: Among the 130 patients, there were 90 men and 40 women, with an average age of 48.7 ± 11.9 years (30 to 65). 50% of all patients were aged over 51 years. The plate used was standard, the same for the 130 patients with the same operating technique. The left side was more affected at 53.8%, the dominant side was less affected at 46%;the majority of patients had been temporarily immobilized with a posterior cast splint before surgery. The average time between trauma and operation was 9 days with a minimum time of 1 day and a maximum of 30 days. At a maximum follow-up of 2 years postoperatively, all patients reported satisfactory results with a return to their previous activities within 60 days after surgery. Conclusion: Medartis H-locked plate osteosynthesis is a reliable solution for the surgical treatment of olecranon fractures.展开更多
AIM: To determine whether use of a precontoured olecranon plate provides adequate fixation to withstand supraphysiologic force in a comminuted olecranon fracture model.METHODS: Five samples of fourth generation compos...AIM: To determine whether use of a precontoured olecranon plate provides adequate fixation to withstand supraphysiologic force in a comminuted olecranon fracture model.METHODS: Five samples of fourth generation composite bones and five samples of fresh frozen human cadaveric left ulnae were utilized for this study. The cadaveric specimens underwent dual-energy X-ray absorptiometry(DEXA) scanning to quantify the bone quality. The composite and cadaveric bones were prepared by creating a comminuted olecranon fracture and fixed with a pre-contoured olecranon plate with locking screws. Construct stiffness and failure load were measured by subjecting specimens to cantilever bending moments until failure. Fracture site motion was measured with differential variable resistance transducer spanning the fracture. Statistical analysis was performed with two-tailed Mann-Whitney-U test with Monte Carlo Exact test.RESULTS: There was a significant difference in fixation stiffness and strength between the composite bones and human cadaver bones. Failure modes differed in cadaveric and composite specimens. The load to failure for the composite bones(n = 5) and human cadaver bones(n = 5) specimens were 10.67 nm(range 9.40-11.91 nm) and 13.05 nm(range 12.59-15.38 nm) respectively. This difference was statistically significant(P ? 0.007, 97% power). Median stiffness for composite bones and human cadaver bones specimens were 5.69 nm/mm(range 4.69-6.80 nm/mm) and 7.55 nm/mm(range 6.31-7.72 nm/mm). There was a significant difference for stiffness(P ? 0.033, 79% power) between composite bones and cadaveric bones. No correlation was found between the DEXA results and stiffness. All cadaveric specimens withstood the physiologic load anticipated postoperatively. Catastrophic failure occurred in all composite specimens. All failures resulted from composite bone failure at the distal screw site and not hardware failure. There were no catastrophic fracture failures in the cadaveric specimens. Failure of 4/5 cadaveric specimens was defined when a fracture gap of 2 mm was observed, but 1/5 cadaveric specimens failed due to a failure of the triceps mechanism. All failures occurred at forces greater than that expected in postoperative period prior to healing.CONCLUSION: The pre-contoured olecranon plate provides adequate fixation to withstand physiologic force in a composite bone and cadaveric comminuted olecranon fracture model.展开更多
文摘Introduction: Olecranon fractures represent approximately 10% of upper limb fractures, orthopedic treatment is often doomed to failure and surgical treatment consists of fixing the fracture sites. Patients and Methods: This study retrospectively analyzed 130 patients, 90 men and 40 women, aged on average 48.7 ± 11.9 years (30 to 65) treated between 2018 and 2020 in the Orthopedics and trauma department at the Moulins-Yzeure hospital center, for olecranon fracture using the Medartis H-locked plate. The study aimed to evaluate the results of this surgical method, particularly with regard to postoperative complications. Results: Among the 130 patients, there were 90 men and 40 women, with an average age of 48.7 ± 11.9 years (30 to 65). 50% of all patients were aged over 51 years. The plate used was standard, the same for the 130 patients with the same operating technique. The left side was more affected at 53.8%, the dominant side was less affected at 46%;the majority of patients had been temporarily immobilized with a posterior cast splint before surgery. The average time between trauma and operation was 9 days with a minimum time of 1 day and a maximum of 30 days. At a maximum follow-up of 2 years postoperatively, all patients reported satisfactory results with a return to their previous activities within 60 days after surgery. Conclusion: Medartis H-locked plate osteosynthesis is a reliable solution for the surgical treatment of olecranon fractures.
文摘AIM: To determine whether use of a precontoured olecranon plate provides adequate fixation to withstand supraphysiologic force in a comminuted olecranon fracture model.METHODS: Five samples of fourth generation composite bones and five samples of fresh frozen human cadaveric left ulnae were utilized for this study. The cadaveric specimens underwent dual-energy X-ray absorptiometry(DEXA) scanning to quantify the bone quality. The composite and cadaveric bones were prepared by creating a comminuted olecranon fracture and fixed with a pre-contoured olecranon plate with locking screws. Construct stiffness and failure load were measured by subjecting specimens to cantilever bending moments until failure. Fracture site motion was measured with differential variable resistance transducer spanning the fracture. Statistical analysis was performed with two-tailed Mann-Whitney-U test with Monte Carlo Exact test.RESULTS: There was a significant difference in fixation stiffness and strength between the composite bones and human cadaver bones. Failure modes differed in cadaveric and composite specimens. The load to failure for the composite bones(n = 5) and human cadaver bones(n = 5) specimens were 10.67 nm(range 9.40-11.91 nm) and 13.05 nm(range 12.59-15.38 nm) respectively. This difference was statistically significant(P ? 0.007, 97% power). Median stiffness for composite bones and human cadaver bones specimens were 5.69 nm/mm(range 4.69-6.80 nm/mm) and 7.55 nm/mm(range 6.31-7.72 nm/mm). There was a significant difference for stiffness(P ? 0.033, 79% power) between composite bones and cadaveric bones. No correlation was found between the DEXA results and stiffness. All cadaveric specimens withstood the physiologic load anticipated postoperatively. Catastrophic failure occurred in all composite specimens. All failures resulted from composite bone failure at the distal screw site and not hardware failure. There were no catastrophic fracture failures in the cadaveric specimens. Failure of 4/5 cadaveric specimens was defined when a fracture gap of 2 mm was observed, but 1/5 cadaveric specimens failed due to a failure of the triceps mechanism. All failures occurred at forces greater than that expected in postoperative period prior to healing.CONCLUSION: The pre-contoured olecranon plate provides adequate fixation to withstand physiologic force in a composite bone and cadaveric comminuted olecranon fracture model.
