## 4 Discussion
In other words, since we are dealing with defects of variable dimensions, the amount of bone gained in one case may be sufficient to allow the placement of implants with ideal dimensions, while the same bone gain in another case may not be adequate [24]. Therefore, the success of guided bone regeneration should be evaluated in terms of achieving the prosthetic project. In this study, despite the heterogeneity of bone defects, it was possible to insert implants of ideal size in all cases and rehabilitate patients with an FP-1 prosthesis in 7 cases and FP-2 type prosthesis in the other 3. Prosthetic reconstruction is crucial for restoring masticatory function, especially in extensive defects. The prosthetic rehabilitation process traditionally involves three phases: bone regeneration based on a hypothetical and approximate positive anatomy, implant placement in available bone, and prosthetic construction based on implant positions. Therefore, prosthetic rehabilitation is guided by implant positions and influenced arbitrarily by bone reconstruction rather than achieving correct occlusion and adequate aesthetic results. To optimize the rehabilitation process and achieve predictable results, an analogical approach for treating edentulous ridges, as described by [PERSON] and [PERSON], was applied in this study. This approach involves prosthetically guided reconstruction, where not only the implant position but also the reconstruction is guided by prosthetics. Patient plaster models can be used to create a diagnostic wax-up simulating the ideal ridge profile and dental anatomy with different-colored waxes. If rehabilitation involves only one side of the arch, the contralateral side is used as a reference for both alveolar ridge anatomy and dental morphology. The diagnostic wax-up helps identify any intermaximillary discrepanciesand asymmetries between the two sides of an arch. It also allows caliper measurement of the thickness of wax used to simulate the required horizontal and/or vertical bone augmentation for achieving the ideal ridge morphology. Once the prosthetic plan is finalized and the bone defect identified, the next step is to perform a precise evaluation of the bone defect anatomy in relation to the final prosthesis. In other words, it is essential to determine whether the available bone volume is compatible with the prosthetically guided implant placement (as anticipated by the diagnostic wax-up) or if grafting procedures are necessary [25]. This study used an approach similar to that presented by [PERSON] and [PERSON] but in an almost entirely digital manner, in order to perform prosthetically guided bone regeneration. Current research in GBR focuses on developing new materials and improving existing ones in terms of resorbability, osteogenesis enhancement, and reducing membrane exposure. Research on resorbable membranes may address the need for a second surgical phase after GBR intervention. Specifically, efforts are being made to develop membranes that can effectively resolve the problem of the second surgical phase after GBR intervention. Further preclinical and clinical studies are needed to develop the most suitable material for GBR techniques [11].