Transacromial loop plate versus clavicular hook plate for acute Rockwood type III–V acromioclavicular joint dislocation: a retrospective comparative study
This retrospective comparative study demonstrates that transacromial loop plate fixation offers superior clinical outcomes, better maintenance of reduction, fewer complications, and eliminates the need for routine secondary hardware removal compared to the traditional clavicular hook plate for acute high-grade acromioclavicular joint dislocations.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Shoulder injuries are a common part of life for anyone who falls hard or takes a direct blow to the shoulder, but one specific type of damage can be particularly stubborn. When the collarbone separates from the shoulder blade at the top of the joint, it is called an acromioclavicular joint dislocation. In severe cases, the ligaments that hold these bones together are completely torn, leaving the collarbone to float upward. While mild versions of this injury can heal with rest, severe separations often require surgery to pull the bones back into place and hold them there while the body repairs the damage. The challenge for surgeons has long been finding a way to hold the bones steady without causing new problems. The traditional method involves a metal plate with a hook that goes under the shoulder blade bone to act as a lever, but this rigid device often grinds against the bone, causing pain and damage that requires a second surgery to remove.
A team of researchers at Fujian Medical University set out to test a different approach that might solve these issues. They compared the standard hook plate against a newer technique called the transacromial loop plate. Instead of using a rigid metal hook that locks the joint in place, this new method uses a flexible system made of high-strength sutures and a small plate. The surgeons create tiny tunnels through the collarbone and the shoulder blade bone, then thread a strong, adjustable loop through them. This setup acts like a flexible suspension bridge, holding the bones in the correct position while still allowing the joint to move slightly as it heals. The researchers wanted to see if this flexible method could keep the bones aligned just as well as the old rigid hook, but with fewer complications and a faster recovery.
To find the answer, the team looked back at the medical records of 53 patients who had suffered severe shoulder separations and underwent surgery between January 2024 and July 2025. They divided these patients into two groups based on the surgery they received: 30 patients got the traditional hook plate, and 23 patients received the new loop plate. The researchers followed every patient for at least one year, checking their pain levels, shoulder strength, and the position of their bones using X-rays. They also tracked how long the patients stayed in the hospital, how big their surgical cuts were, and whether they needed a second operation to remove the metal hardware.
The results showed a clear difference between the two methods. Patients who received the loop plate had much smaller surgical incisions, measuring about 4.14 centimeters, compared to the nearly 7-centimeter cuts required for the hook plate. Because the surgery was less invasive, these patients also spent less time in the hospital, averaging just over six days compared to more than eight days for the hook plate group. More importantly, the loop plate group experienced significantly less pain in the early months after surgery and regained full shoulder function much faster. By the one-year mark, the loop plate group had higher scores for shoulder strength and movement, and a much higher percentage of them were able to return to sports and their normal activities.
Perhaps the most significant finding was the difference in complications. The rigid hook plate caused frequent problems because the metal hook constantly pressed against the bone underneath the shoulder blade. In the hook plate group, more than half of the patients developed complications, including bone erosion and chronic pain, which often forced them to undergo a second surgery to remove the hardware. In contrast, only a small fraction of the loop plate group experienced any complications, and none of them developed the bone erosion seen in the other group. Because the loop plate is made of flexible materials that move with the joint, it did not need to be removed, sparing these patients a second operation entirely.
The study suggests that for severe shoulder separations, the flexible loop plate offers a safer and more effective path to recovery than the traditional hook plate. It keeps the bones aligned without the harsh, grinding pressure that causes long-term damage. While the researchers note that their study was retrospective and looked at a relatively small number of patients, the data strongly indicates that this new technique reduces pain, speeds up healing, and eliminates the need for routine follow-up surgeries. The findings support the idea that allowing the joint to move slightly while it heals, rather than locking it rigidly, leads to better outcomes for patients dealing with these difficult injuries.
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