Leonhardt Henry, Matschke Jan Bernard, Sembdner Philipp, Seidler Alexander, McLeod Niall M H, Bräuer Christian, Franke Adrian
Consultant for Oral and Maxillofacial Surgery, Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Fetscherstraße 74, 01307, Dresden, Germany.
Intern for Oral and Maxillofacial Surgery, Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Fetscherstraße 74, 01307, Dresden, Germany.
Clin Oral Investig. 2025 Sep 29;29(10):479. doi: 10.1007/s00784-025-06585-x.
Condylar head fractures are common in facial trauma and can result in significantly impaired mandibular function. Open Reduction and internal fixation overall produce better functional outcomes than closed treatment. Multiple methods of fixation have been proposed, including the use of biodegradable magnesium-based cannulated bone screws. This study aims to investigate the long-term efficacy of this fixation method using three-dimensional radiographic imaging and clinical outcomes.
This retrospective cohort study of a single centre included patients who underwent surgical intervention for a condylar head fracture using a cannulated magnesium lag screw. Clinical parameters and three-dimensional radiographic scans were collected during follow-up, and virtual model analysis was conducted after segmentation.
Fifty-eight patients received an osteosynthesis with a magnesium alloy implant. The functional results of the final assessment were excellent. Significant changes in volume, surface area, and signs of condylar remodelling were observed during the healing process. Complication rates were low. No implant had to be removed.
Cannulated compression screws using biodegradable magnesium-based alloys show good clinical results despite reduced condylar volume and surface area, as well as significant proof of three-dimensional incongruency of healing mandibular condyles. No patient complained of subjective problems connected to the resorption process, and no mechanical failure prior to fracture healing was recorded. Overall, this method verifies excellent long-term results.
Surgical implants comprised of magnesium alloys provide adequate fixation of fractures of the condylar head with excellent clinical results without the need for a second intervention to remove the implant.
髁突头部骨折在面部创伤中很常见，可导致下颌功能严重受损。与闭合治疗相比，切开复位内固定总体上能产生更好的功能结果。已经提出了多种固定方法，包括使用可生物降解的镁基空心骨螺钉。本研究旨在使用三维放射成像和临床结果来研究这种固定方法的长期疗效。
这项单中心回顾性队列研究纳入了使用空心镁拉力螺钉对髁突头部骨折进行手术干预的患者。在随访期间收集临床参数和三维放射扫描，并在分割后进行虚拟模型分析。
58例患者接受了镁合金植入物的接骨术。最终评估的功能结果极佳。在愈合过程中观察到体积、表面积的显著变化以及髁突重塑的迹象。并发症发生率低。无需取出植入物。
尽管髁突体积和表面积减小，以及愈合的下颌髁突三维不一致的明显证据，但使用可生物降解镁基合金的空心加压螺钉显示出良好的临床效果。没有患者抱怨与吸收过程相关的主观问题，并且在骨折愈合前未记录到机械故障。总体而言，该方法验证了优异的长期结果。
由镁合金组成的外科植入物能为髁突头部骨折提供足够的固定，临床效果极佳，无需二次手术取出植入物。
