PubMed · 11924398
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M A van Waas. 1997. [Theme: implants in the upper jaw].. https://pubmed.ncbi.nlm.nih.gov/11924398/
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This brief overview of the progress and evolution of philosophies of obturator framework designs was accomplished by hand, as well as via Medline. It begins in 1530 ad with Ambrose Paré who described the first button-shaped sponge and metal obturator, and continues through the formation of the American Academy of Maxillofacial Prosthetics and the development of the specialty. It concludes with a simplified discussion of complex surgical-prosthetic coordination and the use of vascularized free flaps with osseointegrated dental implants.
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This clinical report describes a device (Centrascan) used to assist in the correct alignment of the patient's head during computed tomography (CT) assessment of a proposed implant site. To obtain the desired anatomic detail, CT requires precise alignment of the axial images at right angles to the long axis of the proposed implant. This clinical report compared the anatomic morphology of a projected implant site derived from axial images provided by DentaScan software analysis of the CT scan acquisition. Images from a conventional scan, with the patient's head aligned along the frontal plane (perpendicular to the Frankfort plane) and along the sagittal plane (coinciding with either the cortical bone of the hard palate or the inferior border of the mandible), were compared with images acquired by use of the Centrascan device. The two scans differed substantially. In particular, the cross-sectional images obtained by the conventional procedure showed a distorted anatomy; conversely, the images obtained by the Centrascan procedure showed a better reproduction of the examined area. The Centrascan device seemed to help the radiologist achieve a more correct alignment of the patient's head during CT scan acquisition. Further studies are necessary to fully explore the relative technical merits of the Centrascan device.