Oral and Maxillofacial Surgery, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.
J Craniofac Surg. 2022 Sep 1;33(6):1879-1882. doi: 10.1097/SCS.0000000000008431. Epub 2021 Dec 14.
Mandibular asymmetry is a facial deformity that results from multiple causes; among these are growth deficiency like hemifacial microsomia and growth excess as in condylar hyperplasia. The facial asymmetry caused by condylar hyperplasia has been treated over the years with different surgical and nonsur-gical modalities dependent on the age of the patient and the severity of the condition. The authors in this article introduce a modified version of the propeller genioplasty technique.
A new surgical technique "modified propeller genioplasty" is introduced for the management of facial asymmetry. Virtual surgical planning of the osteotomies and segment repositioning was done virtually. A cutting guide, positioning guides and 3D model of the corrected chin were 3D printed, to facilitate replication ofthe virtually planned osteotomies, prebending of plates, and segment repositioning.
The esthetically accepted result was achieved using this technique with minimal postoperative complications.
The technique appeared to be accurate, simple, and more cost efficient when compared to patient-specific plates.
下颌骨不对称是一种由多种原因引起的面部畸形，其中包括生长不足，如半侧颜面短小症，以及生长过度，如髁突过度增生。髁突过度增生引起的面部不对称多年来一直通过不同的手术和非手术方式来治疗，具体取决于患者的年龄和病情的严重程度。本文作者介绍了一种改良的螺旋桨颏成形术技术。
为了治疗面部不对称，我们引入了一种新的手术技术“改良螺旋桨颏成形术”。我们通过虚拟手术规划进行了截骨和骨段重新定位的虚拟设计。通过 3D 打印制作了切割引导器、定位引导器和纠正后的下巴 3D 模型，以方便复制虚拟设计的截骨术、预弯钢板和骨段重新定位。
使用该技术获得了美观可接受的结果，且术后并发症最小。
与个体化的接骨板相比，该技术似乎更准确、更简单、更具成本效益。
