Hounsfield unit comparison of grafted versus non-grafted extraction sockets

Abstract

Volumetric changes of the alveolar ridge after socket preservation with various techniques have been investigated frequently. However, changes in bone density and quality of bone within the extraction sockets have seldom been studied. The purpose of this study was to evaluate the bone quality of grafted versus non-grafted socket sites prior to dental implant placement using Hounsfield unit (HU) values derived from cone-beam computed tomography (CBCT) imaging. The data was collected from 39 healed extraction sites reviewed over a one-year period. Subjects eligible for the study had a bone replacement graft and barrier membrane. Both study and control groups had CBCT scans performed immediately after extraction and four to five months after extraction for planning implant placement. HU values were measured from the CBCT scans and compared between groups. Intragroup variability was assessed utilizing standard deviation and standard error of the mean. Intergroup differences were evaluated using unpaired t-test. A generalized lack of significant difference in bone quality was observed between groups with the only statistically significant difference observed in the posterior maxilla. Future radiographic and histologic assessments of bone quality after socket preservation are required to determine the 'ideal' approach to preserve an extraction socket prior to implant placement. (J Oral Sci 57, [195][196][197][198][199][200] 2015)

Comparison of microsurgical and macrosurgical technique using bioactive synthetic bone graft and collagen membrane for an implant site development: A randomized controlled clinical trial

“…The results obtained are comparable with those of previous studies conducted by Madan et al , and Loveless et al [1920]…”

Hyaluronic acid accelerates bone repair in human dental sockets: a randomized triple-blind clinical trial

“…Many strategies adopted immediately after extraction have proven to maintain bone dimensions. 26 The process of resorption and bone remodeling is more intense in the first three months after extraction and the control of this process remains a challenge in Dentistry. At 30 days, it was observed that bone formation was more advanced in sockets filled with HA, whereas at 90 days treated and control sockets had similar bone density pattern, showing that the biomaterial had a positive influence in the beginning of the alveolar healing process.…”

“…The use of Hounsfield units (HU) is a controversial subject in the literature since the consistency and accuracy of the values remain elusive. 26 On the other hand, a study 24 carried out morphometric analysis using the software KS300, applying the gray intensity to compare bone formation in images captured by CBCT.…”

Associations among Primary Stability, Histomorphometric Findings, and Bone Density: A Prospective Randomized Study after Alveolar Ridge Preservation with a Collagen Cone

“…The change in bone density before and after the ARP measures has been calculated in addition to metric analysis of bone levels [16]. The analysis of CBCT scans regarding radiologically measured bone density was introduced as a method to evaluate the ARP measures [17].…”