Prospective Case Series to Assess Complications of Using Distal Ulna Locking Plate of I.T.S.

Study Overview
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Brief Summary
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Background of the study: Various studies show that the outcome of unstable distal ulna fractures after open reduction and internal fixation is better than closed reduction. The previous plate system for the distal ulna fractures is applied exclusively on the extensor side. This often leads to irritation of the extensor tendons, as well as problems with pronation and supination. With the new shape of the angle-stable distal ulna plate, the investigator hopes that the stability of the fracture osteosynthesis will remain the same and that it will be better tolerated with regard to the surrounding soft tissue, especially the extensor tendons. In this way, an otherwise practically unavoidable removal of osteosynthesis material could - at least in some cases - be avoided and some patients spared a follow-up operation. With this in mind, the investigator tries to achieve the greatest possible reconstruction and stability for early functional follow-up treatment with a slightly bulky implant placed in the tendon-free area.

Detailed Description
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With this study, the application and usability of the new angle-stable plate system should be determined and documented. New value of the study: This system enables an optimal position of the plate on the distal ulna, on the one hand due to the position on the flexor side and on the other hand due to the new shape, adapted to the anatomy of the distal ulna. The locking system using angle-stable screws corresponds to the systems previously used by I.T.S. Design: Prospectively, handling, advantages and possible complications of the angle-stable, distal ulna plate; Company I.T.S. in the osteosynthesis of the unstable distal ulna fracture. A total of 20 patients with unstable distal ulna fractures are to be treated and evaluated over a period of 12 months according to the study design. Risk/Benefit: With the use of the angle-stable distal ulna plate, company I.T.S. the patients broken bone may heal better. However, it is also possible that the patient will not benefit directly from his/her participation in this clinical trial. The Expected Benefit of the Locking Distal Ulnar Plate; Company I.T.S. includes: Reduced risk of bone misalignment after surgery. Less risk of irritating tendons on the plate with the new location. A removal of the osteosynthesis material could possibly be avoided.

Official Title
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Prospective Case Series to Assess the Handling, Healing and Complications of Using a Titanium Small Fragment Plating System With a New Shape Specifically Adapted to the Distal Ulna

Conditions
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Ulna Fractures

Intervention / Treatment
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* Device: DUL- Distal Ulna Locking PLate (I.T.S)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age over 18 years unstable distal ulna fractures Fracture classification according to Biyani [4]: all types Exclusion Criteria: Age under 18 years old stable fractures of the ulna Patient had one before ulna fracture Patient may result in physical or intellectual disability consent not grant Patient is for more Check-ups not available (Abroad) Patient does not have full legal capacity Alcohol and drug abuse Increased risk of anesthesia (from ASA 3)

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| DUL treatment group<br>Patients with unstable ulna fractures will be operated and treated with the Distal Ulna locking plate (I.T.S. company) according to clinical routinal indication. | Device: DUL- Distal Ulna Locking PLate (I.T.S)<br>* The patients are surgical treated with the Distal Ulna locking plate according to standard surgical procedures to treat the unstable distal ulna fractures.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Complicationsrate | Percentage of complications rate of patients treated with DUL | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Clinical outcome (range of motion) | Degree of the possible range of motion using a goniometer to measure the movement angles in correlation of the healing process. The better the range of motion the higher the value. Normally the following limits are given: Radial: least 0 degree, maximum: 20 degree Ulnar: least 0 degree, maximum: 40 degree Extension: least 0 degree, maximum: 70 degree Flexion: least 0 degree, maximum: 70 degree Pronation: least 0 degree, maximum: 90 degree Supination: least 0 degree, maximum: 90 degree | 1year | 
| Clinical outcome (grip strength wrist) | Extent of possible grip strength measurement using dynanometer in correlation of the healing process. Minimum: 0 kilogram Maximum: 80 kg | 1year | 
| Patient Reported Outcome (function) | Percentage of the patients with reduced or normal outcome after fractures using questionnaires like the DASH Score in correlation of the healing process. This is a score reporting the functional outcome, satisfaction and quality of life. Best score is 100%, least score 0% | 1 year | 
| Patient Reported Outcome (pain) | Percentage of the patients with remaining pain after fracture using the visual analog scale in correlation of the healing process. The scale reports about the intensity of pain. The maximum pain and least score is 10, and the best score is 0 which means no pain. | 1 year |