The maxillary sinus floor in the oral implantology

Clinical and Topographical Anatomy Department, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie (Impact Factor: 0.66). 02/2008; 49(4):485-9.
Source: PubMed


The aim of this study was to establish the mean distances between the maxillary sinus floor and the roots of the lateral maxillary teeth in dentate subjects, respectively the mean height of the available bone for oral implant placement in the corresponding area, in edentulous ones.
We determined the maxillary sinus floor position in relation to morphoclinical alveolodental benchmarks on 50 dry skulls, dentate 30 and edentulous 20, and correlations were performed by use of 40 CT-scans of the targeted area. In addition, 20 human adult cadavers were bilaterally dissected in order to bring topographical evidence at that level.
The data we obtained lead us to define three dentosinusal relations: tangent (close) relation 60.8%; distanced relation 25.6%; penetrating relation: 13.6%; three subantral classes in edentulous patients, emphasizing the direct relation of the age of the edentulism and the degree of bone resorption. We discuss the results we obtained from the viewpoint of their application in the field of oral implantology.
The maxillary sinus floor represents the danger zone for the oral implantology.

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Available from: Nicoleta Măru, Mar 28, 2014
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    • "Although the current study did not calculate the amount of bone remaining between sinus floor and root apices, yet it is obvious that the maximum amount of sinus pneumatization around the 2nd molar obtained in our study goes in agreement with the least amount of bone remaining above the 2nd molar in different studies [6] [17] [29] [35]. The inverse relation between sinus pneumatization and remaining alveolar bone is well known and is further strengthened by Nimigean et al. [35]. Their study inferred that the antral floor depends upon the dental scaffold that constitutes the main factor during development and will transform in relation with the normal/pathological status of the dentoperiodontal apparatus, for which they concluded that the available bone is lost from the inferior expansion of the sinus after teeth loss. "
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