BACKGROUND: Although the traditional bone augmentation technology can basically meet the clinical needs at present, the effect of bone augmentation in most cases is related to the experience of the operator . PROPOSE: This study commits to providing a digital solution for precise bone augmentation in the field of oral implantology . MATERIALS AND
METHODS: After collecting the data of patients' intraoral scanning and DICOM (digital imaging and communications in medicine), the implant position is digitally designed, and the alveolar bone is digitally augmented around the ideal implant position . On the premise of ensuring that the thickness of labial bone is 2 mm, and there is sufficient alveolar bone 3 to 4 mm apically from the ideal gingival margin for implant placing, we carry out excessive augmentation of 0.5 and 1 mm on the labial bone and alveolar crest, respectively, to compensate for possible bone resorption after 6 months . After 3D printing the reconstructed alveolar bone model, the titanium mesh is trimmed and preformed on the alveolar bone model . Outcomes are reported in terms of mean values (5% -95% percentile values).
RESULTS: Thirty implant sites have accepted this novel virtually designed alveolar bone augmentation . Before the second-stage surgery, the average vertical bone gain was 2.48 mm (0.29-6.32), the average horizontal bone gain was 4.11 mm (1.19-8.74), the average height of the residual alveolar bone above the implant platform was 1.44 mm (0.59-2.92), the average thickness of the labial bone width at the implant platform was 2.00 mm (0.93-3.64), the average thickness of the labial bone width at 2 mm apically from the implant platform was 2.74 mm (1.40-5.46). The virtual augmentation of each tooth position was 349.41 mm3 (165.70-482.70), while the actual augmentation of each tooth position was 352.94 mm3 (159.24-501.78), the accuracy of the final actual augmentation reached 95.82% (range from 88.53% to 99.15 %).
CONCLUSION: This case series suggests that a virtually digital guided bone regeneration (GBR) workflow is precise and controllable . The practicality, safety and effectiveness of this procedure needs to be compared to other bone augmentation procedures in randomized controlled trials.