Micro-CT evaluation of the cortical bone micro-architecture in the anterior and posterior maxilla and the maxillary sinus floor |
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Authors: | Bertl Kristina Domic Danijel Hirtler Lena Heimel Patrick Esfandeyari Azadeh Stavropoulos Andreas Ulm Christian |
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Affiliation: | 1.Department of Periodontology, Faculty of Odontology, University of Malmö, Carl Gustafs väg 34, 20506, Malmö, Sweden ;2.Division of Oral Surgery, School of Dentistry, Medical University of Vienna, Vienna, Austria ;3.Division of Anatomy, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria ;4.Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, Medical University of Vienna, Vienna, Austria ;5.Austrian Cluster for Tissue Regeneration, Vienna, Austria ;6.Ludwig Boltzmann Institute for Clinical and Experimental Traumatology, Vienna, Austria ; |
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Abstract: | Objectives To perform a within-subject comparison of the cortical bone micro-architecture of the maxillary sinus floor (MSF) to that of the buccal aspect of the anterior and posterior maxilla. MethodsMicro-CT scans of the buccal aspect of the anterior and posterior maxilla and of the MSF in 14 human anatomical specimens were recorded. Within-subject comparisons were performed for cortical thickness (Ct.Th) and porosity (Ct.Po), average pore volume (AvgPo.V), and pore density (Po.Dn). ResultsThe MSF presented the lowest and the anterior maxilla the highest Ct.Th, while Ct.Po was significantly higher at the MSF compared to the posterior maxilla (p = 0.021). No relevant differences were recorded for AvgPo.V and Po.Dn among regions (p > 0.067). Further, an increased Ct.Th at the MSF was significantly associated with a lower Po.Dn, while a higher Ct.Th and an increased AvgPo.V in the anterior maxilla were associated with a higher Ct.Th and an increased AvgPo.V, respectively, in the posterior maxilla and MSF. Finally, within each region, the AvgPo.V was associated positively with Ct.Po and negatively with Po.Dn. ConclusionsThe cortical bone of the MSF is slightly less thick and slightly more porous compared to the cortical bone at the buccal aspect of the anterior and posterior maxilla. Clinical relevanceDuring lateral and vertical bone augmentation procedures, the cortical recipient bone is perforated several times to open the bone marrow compartment to facilitate provision of osteoinductive cells and molecules in the augmented space. Whether it is meaningful to approach the MSF in a similar way during MSF augmentation procedures or whether the slightly more porous structure of the MSF observed herein reduces the cortical barrier function already sufficiently has to be assessed in future clinical trials. |
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