Bone reconstruction surgeries such as the autogenous and allogeneic shell techniques, wherein cortical laminates are used to regenerate bone defects, require time and expertise to adapt and fix the laminated cortical blocks onto the defect area. This case report illustrates the process of customizing and fixing an allogeneic cortical laminate (ACL) to reconstruct a horizontal bone defect with guided surgical stents. Two types of surgical stents were designed: one to aid in cutting a prefabricated ACL into the desired shape for the defect to be regenerated, and one to assist in the positioning and fixation of the resulting laminates. These stents enabled the clinician to regenerate a horizontal defect with reduced surgical time and increased precision and safety during laminate fixation. After 5 months of healing, a dental implant could be placed in the regenerated site. The use of surgical stents in this type of bone regeneration surgery can be helpful, especially in more complex bone defects where precision is key. Further clinical studies are needed to validate this technique.