Fig. 6

Comparison of the changes in increased bone height after bone graft (a-d), analysis of radiological intensity (HU values) in the newly generated bone using CT views at T3 (e), and implant stability quotients (ISQ values) by resonance frequency analysis results at T2 (f). a & b In both inlay and onlay type bone grafts, Group 1 shows a more prompt vertical bone loss than Group 2; there is statistical difference in remaining bone height between the two groups at T4 and T5. The intraoral jaw bone graft group has more residual grafted bone height than the iliac bone graft group after 2–3 years postoperatively (p < 0.05). c & d Changes in the vertical bone height were compared in the maxillary and mandibular ridges. In the maxillary fixtures, the intraoral jaw bone graft group showed a statistically lower vertical bone resorption rate at T4 and T5 than the iliac bone graft group (p < 0.05). A similar tendency for vertical bone resorption was observed in the mandibular fixtures, with no statistical difference between the groups (p > 0.05). e CT views at T3 (1 year postoperatively) reveal similar HU values in the newly generated bones between the two groups (p > 0.05). f Implant stability tests by resonance frequency analysis at T2 (5–6 months postoperatively) exhibit similar ISQ values between the two groups (p > 0.05). Data represent mean ± standard deviation, and an asterisk (*) indicates a significant difference between Groups 1 and 2 (p < 0.05)