LAUSR

Guided bone regeneration (GBR) represents the gold standard to reconstruct alveolar bone and peri-implant rehabilitation. The key principle of GBR is the use of membrane to exclude non-osteogenic tissues from interfering with bone regeneration. Membranes must have some characteristics such as biocompatibility, tissue integration cellocclusion properties, and space making ability. Titanium mesh is a non-resorbable membrane with good spacemaking effect and frequently combined with grafting materials. However, titanium mesh exposure is one of the common complications. Recently, three-dimensional (3D) printing model is increasingly used in oral and maxillofacial reconstruction surgery for creating custom cutting guides, fixation devices, practice models, and implanted medical devices to improve the treatment outcome. Prior to surgery, titanium mesh pre-formed on a 3D printing model could make the shape of titanium mesh more precise and accuracy for shortening the operation time. The 24-year-old male came to the Department of Oral and Maxillofacial Surgery, Changhua Christian Hospital, Changhua, Taiwan, with the chief complaint of poor chewing function at the right upper arch, which occurred after trauma for 10 months. After physical examination and cone-beam computerized tomography (CBCT) evaluation, the missing teeth 11, 12, 13, 14, and 15 and almost total destruction of the right maxillary alveolar bone were observed (Fig. 1A and B). Before surgery, 3D printing model was created by 3D printing machine (3D system, Projet CJP 660 pro, Rock Hill, SC, USA) from CBCT scans (Fig. 1C). Two