Determination of the Volume and Density of Mandibular Ramus as a Donor Site Using CBCT

Mahdi Kadkhodazadeh; Marziyeh Shafizadeh; Mohammadreza Rahmatian; Yaser Safi; Reza Amid

doi:10.1007/s12663-021-01546-9

Determination of the Volume and Density of Mandibular Ramus as a Donor Site Using CBCT

J Maxillofac Oral Surg. 2022 Dec;21(4):1140-1147. doi: 10.1007/s12663-021-01546-9. Epub 2021 Mar 19.

Authors

Mahdi Kadkhodazadeh¹, Marziyeh Shafizadeh², Mohammadreza Rahmatian², Yaser Safi³, Reza Amid⁴

Affiliations

¹ Dental Research Center, Periodontics Department, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran.
² Dental Research Center, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran.
³ Radiology Department, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran.
⁴ Periodontics Department, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran.

Abstract

Introduction: This study aimed to assess the quantity and quality of available bone to provide the autologous bone graft from mandibular ramus.

Material and methods: CBCT scans were collected and mandibular ramus was evaluated by measuring a variety of parameters including volume, bone height, cortical, and cancellous bone thickness. Data analysis was performed using descriptive statistics and inferential statistics. We used the Kolmogorov-Smirnov test for the evaluation of data normality. We then applied Pearson correlation and independent t-test for normal variables, and Spearman and Mann-Whitney correlation tests for abnormal variables. Statistical analysis was performed using SPSS version 19 and P value < 0.05 was considered significant.

Results: A total of 52 women and 32 men (aged 21 to 70) were included in this study. The mean bone volume was 2.7 ± 0.70 cm³ [95%confidence interval (CI) 1.3-4.5]. The mean bone density in the middle section was 1016.36 ± 231.58 Gy value (95% CI 475.6-1520.9). Kolmogorov-Smirnov test revealed that the variables such as apical cortical/cancellous ratio (P = 0.005), middle-cancellous bone thickness (P = 0.016), and middle cortical/cancellous ratio (P = 0.005) were abnormal and the rest were normal. Bone density, as well as the amount of cortical bone in the middle and apical regions, had a significant reverse correlation with age (P < 0.001).

Conclusion: The volume, density, and cortical/cancellous ratio are independent of sex. The reverse relationship between age and bone density, as well as the amount of cortical bone in several parts, indicates a decrease in bone quality with aging.

Keywords: Autogenic grafts; Bone grafts; CBC; Imaging; Mandible; Ramus.