Aim: This study was carried out to compare clinically, radiographically and
histomorphologically between narrow alveolar ridge augmentation using allogenic
bone block versus ultrasonic ridge splitting technique combined with bone chips.
Subjects and methods: Twenty patients were devieded randomaly into two equal
groups, by using a flip of coin as the following; Group 1: 10 Patients with narrow
mandibular alveolar ridge received allogenic bone block then after 6 month Implants
were placed. Group 2: 10 Patients with narrow mandibular alveolar ridge received
piezo splitting technique and allogenic bone chips then after 6-month implants were
placed. Clinical and radiographic parameters were gathered at baseline and 6 months
after ridge augmentation. Results: There were statistically significant differences
between Group I & Group II at 6,9 months regarding alveolar ridge width, peri-implant
probing depth (PPD), implant stability quotient (ISQ), Changes in marginal bone loss
(MBL)and bone density measurements (BD) And vice versa, no statistically significant
differences at 6, 9 months in modified plaque index (mPI) and modified sulcus bleeding
index (mSBI). Conclusion: Within the limitations of this study can conclude that, both
techniques exhibited successful treatment outcomes in narrow alveolar ridge, ridge
splitting technique seems to be a very effective modality for implant placement in
narrow alveolar ridge, that this technique is a safe and predictable in thin ridge cases,
finally the use of corticocancellous block allografts had given promising results, thus
allowing the placement of implants of standard length and diameter, thereby improving
the long-term prognosis of the implant-supported reconstruction.