Comparison of Outcomes of Membranous With Endochondral Bone Graft in Orbital Floor Reconstruction

Abstract

Objective: To compare membranous with endochondral bone graft in orbital floor reconstruction in terms of donor site hematoma and correction of postoperative diplopia. Study Design: Randomized clinical trial. Place & duration of study: Department of Oral & Maxillofacial Surgery, King Edward Medical University / Mayo Hospital Lahore. One year from 01-07-09 to 30-06-10. Material and Method: 58 patients clinically and radiographically having defect in the orbital floor due to trauma were included in the study. According to the treatment, patients were randomly divided into two groups by lottery method. Group A (29 patients) received the membranous bone graft from calvariumand Group B (29 patients) received the endochondral bone graft from anterior iliac crest. The variables to be analyzed were donor site hematoma and post-operative diplopia. Results:Group A consisted of 29 patients (mean age 30.31years + 11.41) and Group B consisted of 29 patients (mean age 29.6 years + 9.05). Donor site hematoma developed in 3 (10.3%) patients in Group A and in 9 (31.0%) patients in Group B. In Group A, postoperative diplopia persisted in 2 (6.9%) patients and in Group B, it persisted in 5 (17.2%) patients. Chi-Square test was used to compare the variables in both groups and the results were statistically significant for donor site hematoma (p value: 0.026) but insignificant for postoperative diplopia (p value: 0.113).  Conclusion: Membranous bone graft is better than endochondral bone graft in terms of donor site hematoma. When it comes to the correction of postoperative diplopia, there is no difference between two types of bone graft.