Assessment of mandibular ascending ramus cortical plates for reconstruction of atrophic maxillary ridges versus chin cortical plates : A randomized clinical trial / Ahmed Yousri Zayed ; Supervised Nevien Abdelatif Askar , Mohammed Atef Abdelrasool

Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics

The present study is a randomized clinical trial to evaluate the efficacy of atrophic maxillary ridge augmentation by ramus block graft versus symphyseal block graft. Eighty patients (with 20 operating sites) seeking implant rehabilitation for the atrophic maxillary ridge were selected from the outpatient clinic of the Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Cairo University.10 sites were augmented by ramus block graft and the other 10 sites were augmented using symphyseal block graft. All patients were regularly assessed both clinically and radiographically upto 6 months post-operatively. Histomorphometric analysis was performed using biopsies during implants placement. Statistical analysis showed that both groups showed a significant increase in alveolar bone width immediately post-operative and at 6 months.The mean graft resorption in the ramus group 6 months post- operative was considered non- significant while in the symphyseal group the mean graft resorption was significant. And the mean graft resorption of ramus group compared to the symphyseal group was statistically significant. Bone area % of ramus group was significantly increased when compared to the corresponding value of symphyseal group Thus within the limits of this study the following could be concluded: Ascending ramus onlay blocks showed significant better results than symphyseal onlay blocks regarding both the quality and stability of the grafted volume of bone. Ramus graft harvesting is a more sensitive procedure as compared to symphyseal block graft and requires certain level of surgical skill and experience to be performed successfully

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