Radial Head Plate. Home > Resources > Images > Radial Head Plate. Acumed Radial Head Plating System – On Bone T: ; E: [email protected] Acumed’s Locking Radial Head Plate System provides an innovative and improved method for the treatment of fractures where the radial head. The Acumed Anatomic Radial Head System is designed to provide an 2 Mini and Micro instruments and the Locking Radial Head Plate System at the base of .
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J Hand Surg Am. Methods Three commercially available circular radial head designs were compared with an anatomical radial head and 2 modified anatomical prototype radial head designs in 10 cadaveric specimens.
Anatomic Radial Head System
For comminuted radial head fractures, satisfactory internal had to comminuted radial head is often difficult. Converging and diverging screw angles provide stability and support, and help capture fracture fragments.
K-wire holes are included in the plate for provisional fixation distally, and specially designed plate tacks may be used for provisional fixation proximally. By providing the patient with an anatomical prosthesis, wear on the capitellum is theoretically reduced due to the improved biomechanics and balancing within the elbow. Internal fixation is difficult in many cases and sometimes leads to implant failure [ 67 ].
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Comminuted radial head fractures treated by the Acumed anatomic radial head system
The coronoid fracture and the olecranon fracture were fixed with screw Figure 2. Grit Blasted Stem Radil Promotes bony ongrowth. The Acumed Anatomic Radial Head System is designed to provide an anatomic implant to replace the patient’s native radial head.
We classified stress shielding as: At the same time, the coronoid process is one standard to assess the radial head prosthesis size. Received Jan 17; Accepted Mar The prosthesis that best mimicked native contact behavior was the anatomical radial head prototype 2 owing to its design for articulating with the capitellum, the lateral trochlear ridge, and the sulcus between.
Journal Abstract Hypothesis Our aim was to test whether anatomically designed metallic radial head implants could better reproduce native radiocapitellar contact pressure and areas than nonanatomic implants.
The radial head is clearly not round but has a more ellipsoidal shape [ 10 ]. Resect the radial head with a microsagittal saw as close to the surgical neck as possible. Conservative treatment in this type of fracture causes poor results.
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If the radial head fracture associated with coronoid fracture, we used a screw or anchor to fix the coronoid process and strength the elbow stability. Table 1 Type of radial head fracture with associated injuries recorded for the 12 patients. Peak contact pressures were also measured and were significantly elevated with all prostheses tested. The stem of the AARHS is uncemented and fixed through a tight press fit, so it can reduce the incidence of loosening.
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Radial head replacement with a bipolar system: However, it is typically minor, nonprogressive, and of questionable clinical consequence. These choices acumer the surgeon with multiple implant options and accommodate the individual differences in natural anatomic head and neck shape. The evaluation included a record of pain, function, muscle strength, contracture and rotation.
All patients had an excellent or good clinical result.
A radial head replacement is more effective in comminuted radial head fractures. Our radiological review showed no evidence of peri-prosthetic lucency during the following up.
This study was performed on 12 patients with traumatic elbow fracture and instability between and of whom 12 acumeed reviewed at a mean follow-up of Journal Abstract Objective To determine acumex radiocapitellar contact pressures would be elevated with nonanatomical circular prostheses over those mimicking native anatomy and if such pressures would be related to the depth and contour of the articular dish and to the pattern of prosthetic articulation against the lateral trochlear ridge.
Radius Retractor – Designed to help elevate the radius, this tool may assist during reaming, trialing, and insertion of the implant.
The distal tip of the Plate Tack is threaded, allowing it to maintain its provisional fixation until it is removed later in the procedure. Email Updates Yes, please send me updates by email. The lateral and medial ulnohumeral space, proximal radial migration was recorded. Discussion For comminuted radial head fractures, satisfactory internal fixation to comminuted radial head is often difficult.
Radial head resection leads to pain in the forearm and wrist, joint instability, decreased strength, osteoarthrosis and cubitus valgus [ 1 – 5 ]. All operations were performed using the Acumed anatomic radial head prosthesis system within ten days of injury.
The dominant limb was injured in seven patients. Author information Article notes Copyright and License information Disclaimer. The collar height gauge helps determine the proper implant collar height to restore the natural length of the radius. Patients and methods General data Between January and December12 patients six men and six women Table 1 with radial head comminuted fractures were treated by radial head replacement of the Acumed anatomic radial head prosthesis system.
The mean DASH score was Standard Length Stems Standard length stems range from 6—10 mm in diameter in 1 mm increments and 0—8 mm heights in 2-mm incrementsand are fully grit-blasted to promote bony ongrowth. The designs have provided enough selections to accommodate the anatomy of the proximal radius.
In a direct radius-to-capitellum axial loading experiment, an anatomically designed radial head prosthesis had lower and more evenly distributed contact pressures than the nonanatomic implants that were tested.