![]() The purpose of this systematic review is to evaluate the current state of the art of making genioplasties using 3D printing technology. This guide / theses guides can aid the surgeon in not touching the surrounding noble anatomical structures (dental roots, alveolar nerve lower) (AKA cutting guide) and / or allow movements of repositioning of the chin in the desired position defined preoperatively (AKA repositioning guide). The use of a surgical guide obtained with 3D-printing technologies could improve the results of the intervention by a three-dimensional pre-operative simulation and manufacture of per-operative guide(s). Surgical guide is commonly used in dental implantology ( 7) and its use is now spreading to orthognathic surgery. These new technologies are revolutionary steps in our way of working as maxillo-facial surgeon ( 6). 3D printing is also known as rapid prototyping, additive manufacturing and CADCAM technique. In these present times, there is a surge of 3D printing technology in surgical techniques especially in the area of maxillo-facial surgery. Traditionally, genioplasty is performed based on surgeon’s intraoperative assessment ( 5). The osteotomy location and the movement of the bony segment directly impacts the surgical outcome. To obtain the best results in genioplasty, it is essential to make an optimal surgical plan. This technique was then modified by several others and used to move the chin in all three dimensions of space: setback genioplasty, impaction genioplasty, vertical height augmentation genioplasty, narrowing genioplasty and widening genioplasty ( 4). Trauner and Obwegeser ( 3) were the first surgeons to perform a chin advancement osteotomy via an intraoral approach and called it « genioplasty ». ![]() Gillies and Millard ( 2) applied the same technique on a living patient, also using an external approach. The first surgeon who had performed a chin advancement osteotomy by an extra-oral approach was Otto Hofer ( 1) on a cadaver. It consists of an osteotomy of the inferior border of the mandible allowing movement of the chin in three dimensions and positioning it in its new desired position. ![]() Genioplasty is a widely used surgical technique used to correct chin deformity. ![]()
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