Aim: This study was conducted to evaluate the efficacy of using conventional surgical stents guided by cone beam computed tomography in determining the position and buccolingual inclination of implants placed in posterior mandibular knife edge ridge in cases of ridge splitting with and without bone grafting material. Materials and Methods: The study was conducted on sixteen implants placed bilaterally in posterior knife edge mandibular ridge of four patients, where each patient received four implants in the form of two in each side. Implants on the right side of the ridge were placed following ridge splitting and bone grafting (group A). Implants on the left side of the ridge were placed following ridge splitting without bone grafting (group B). All implants were placed using conventional surgical stent guided by cone beam computed tomography for determining the proposed mesiodistal position and buccolingual inclination of implant fixtures. On the 3D axial and coronal cut of the cone beam computed tomography, the accuracy of using surgical stent for proper mesiodistal position and proper buccolingual inclination of each implant in relation to inclination of the lingual plate was evaluated in both groups. Results: The difference between mesiodistal preoperative proposed implant position and postoperative implant position in each of the two groups was not statistically significant. However, regarding buccolingual inclination the difference between inclination of implant and inclination of the lingual plate was not statistically significant in group A with bone grafting while, the difference was highly statistically significant in group B without bone grafting. Conclusion: Using conventional surgical stents guided by cone beam computed tomography aids in accurate determination of implant position even in cases of ridge splitting. However, it helps in insertion of implants with proper buccolingual inclination only in cases of ridge splitting with bone grafting.
Rizk, Fardos N. and Abdelhamed, Engy, "Radiographic Evaluation of Accuracy of Surgical Stent for Implant Placement in Knife Edge Posterior Mandibular Ridge in Cases of Ridge Splitting" (2014). Dentistry. 96.