Hanafy, M., A. Abou-ElFetouh, and R. M. Mounir, "{Quality of life after different approaches of orthognathic surgery: a randomized controlled study}", Minerva Stomatologica, vol. 68, no. 3, pp. 112–117, apr, 2019. AbstractWebsite

over the last decade, the accuracy of 3D computer-assisted orthognathic surgery has been extensively investigated. However, patient-reported outcome measures have been rarely reported for this technology. this study aimed to assess quality of life following orthognathic surgery using caD/caM bone splints compared to the classic oc- clusal wafers in patients with dentofacial deformities. MetHoDS: thirty-two patients were randomly allocated into two groups where group i utilized caD/caM splints and patient specific osteosynthesis for maxillary positioning and group II utilized occlusal wafers fabricated on a semi- adjustable articulator. Patients were assessed using orthognathic quality of life Questionnaire (oQlQ) preoperatively and 6 months postoperatively. reSUltS: Mean oQlQ overall score change of 24.375±11.96 took place in group i patients while group ii showed a mean change of 23±8.39. conclUSionS: the study showed evident improvement in quality of life following orthognathic surgery compared to before surgery. However, computer-assisted surgery did not show any significant improvement over the classic approach. (Cite

Hanafy, M., A. Abou-Elfetouh, and R. Mounir, "{Accuracy assessment of CAD/CAM generated surgical guides and patient-specific osteosynthesis compared to classic model surgery in patients with dentofacial deformities. A randomized controlled clinical trial}", International Journal of Oral and Maxillofacial Surgery, vol. 48, no. supplement 1, pp. 121, may, 2019. AbstractWebsite

Over the last decade, the accuracy of 3D computer-assisted surgery for dentofacial deformities have been extensively investigated. The CAD/CAM generated wafers failed to show significant accuracy improvement over the conventional model surgery. Absence of high quality randomized controlled trials, limited number of studies and methodological flaws hinder the computer-assisted orthognathic surgery use in general clinical practice. Objectives: This study aimed to assess the accuracy of the CAD/CAM generated surgical guides and patient-specific osteosynthesis compared to the classic model surgery. Methods: Eighteen patients were randomly allocated into two groups where group 1 utilized CAD/CAM generated splints and patient-specific osteosynthesis for maxillary positioning and group 2 utilized interocclusal wafers fabricated on a semiadjustable articulator. The included patients were prospectively assessed using preoperative and postoperative CBCT scans for linear and angular deviation of the actual postoperative maxillary position from the virtual preoperative plan. Findings: The CAD/CAM generated guides showed a mean vertical deviation of 0.26 mm, anteroposterior deviation of 0.17mm and mediolateral deviation of 0.08 mm while the classic model surgery showed a mean deviation of 1.45mm vertically, 1.31mmanteroposteriorly and 0.71mmmediolaterally. Statistical analysis showed that the proposed computer-assisted orthognathic surgery workflow provides significantly more accurate plan transfer compared to classic model surgery. Conclusion: The proposed workflow facilitated management of cases with skeletal asymmetry, reduced operating time, avoided technical obstacles with the classic model surgery and allowed trainee surgeons to perform the procedure with great accuracy and minimal time frame. The main limitation was the high cost.

Hanafy, M., Y. Akoush, A. Abou-Elfetouh, and R. M. Mounir, "{Precision of orthognathic digital plan transfer using patient-specific cutting guides and osteosynthesis versus mixed analogue–digitally planned surgery: a randomized controlled clinical trial}", International Journal of Oral and Maxillofacial Surgery, jun, 2019. AbstractWebsite

Over the last decade, the accuracy of three-dimensional computer-assisted orthognathic surgery has been investigated extensively. The absence of high-quality controlled trials, limited number of studies overall, and methodological flaws have hindered its use in general clinical practice. The aim of this study was to assess the accuracy of computer-assisted orthognathic surgery compared to the classic occlusal wafers. Eighteen patients were randomly allocated to two groups: CAD/CAM splints and patient-specific osteosynthesis were used for maxillary positioning in group 1; occlusal wafers fabricated on a semi-adjustable articulator were used in group 2. Patients were assessed for linear and angular deviations of maxillary position from the virtual plan using cone beam computed tomography scans. The CAD/CAM group showed mean deviations of 0.26 mm vertically, 0.17 mm anteroposteriorly, and 0.07 mm mediolaterally, while the classic wafer group showed mean deviations of 1.45 mm vertically, 1.31 mm anteroposteriorly, and 0.71 mm mediolaterally. Statistical analysis showed that the proposed workflow provided a significantly more accurate plan transfer compared to classic occlusal wafers. Despite the statistical significance, the clinical significance was less appreciated. However, this new technology facilitated cases with skeletal asymmetry, reduced operating times, and allowed a trainee surgeon to perform the procedure with great accuracy and minimal time. The main limitation was the high cost.

Hanafy, M., A. Abou-Elfetouh, and R. Mounir, "Accuracy assessment of CAD/CAM generated surgical guides and patient-specific osteosynthesis compared to classic model surgery in patients with dentofacial deformities. A randomized controlled clinical trial", International Conference of Oral and Maxillofacial Surgery (ICOMS 2019 RIO), Rio de Janeiro, 22 May 2019.