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Daniel M. Prevedello - One of the best experts on this subject based on the ideXlab platform.
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Surgical anatomy and nuances of the expanded transpterygoid approach to the pterygopalatine fossa and upper parapharyngeal space: a stepwise cadaveric dissection.
Acta neurochirurgica, 2020Co-Authors: Giuliano Silveira-bertazzo, Rafael Martinez-perez, Ricardo L. Carrau, Daniel M. PrevedelloAbstract:Superb knowledge of anatomy and techniques to remove the natural barriers preventing full access to the most lateral aspect of the skull base determines the ease of using the transpterygoid approach (ETPA) as the main gateway for all the coronal planes during endonasal surgeries. Throughout stepwise image-guided cadaveric dissections, we describe the surgical anatomy and nuances of the ETPA to the pterygopalatine fossa (PPF) and upper parapharyngeal space (UPPS). The ETPA represents a lateral extension of the midline corridor and provides a valuable route to access the PPF/UPPS. Major landmarks for this EEA are the Infraorbital Canal, sphenopalatine foramen, and vidian nerve. It comprises the removal of the palatine bone, posterior wall of the maxillary sinus, and PPF transposition to drill the pterygoid process.
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Surgical anatomy and nuances of the expanded transpterygoid approach to the pterygopalatine fossa and upper parapharyngeal space: a stepwise cadaveric dissection
Acta Neurochirurgica, 2020Co-Authors: Giuliano Silveira-bertazzo, Rafael Martinez-perez, Ricardo L. Carrau, Daniel M. PrevedelloAbstract:Background Superb knowledge of anatomy and techniques to remove the natural barriers preventing full access to the most lateral aspect of the skull base determines the ease of using the transpterygoid approach (ETPA) as the main gateway for all the coronal planes during endonasal surgeries. Methods Throughout stepwise image-guided cadaveric dissections, we describe the surgical anatomy and nuances of the ETPA to the pterygopalatine fossa (PPF) and upper parapharyngeal space (UPPS). Conclusion The ETPA represents a lateral extension of the midline corridor and provides a valuable route to access the PPF/UPPS. Major landmarks for this EEA are the Infraorbital Canal, sphenopalatine foramen, and vidian nerve. It comprises the removal of the palatine bone, posterior wall of the maxillary sinus, and PPF transposition to drill the pterygoid process.
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Anatomical Variants of the Infraorbital Canal: Implications for the Prelacrimal Approach to the Orbital Floor.
American journal of rhinology & allergy, 2019Co-Authors: Nyall R. London, Daniel M. Prevedello, Ricardo L. CarrauAbstract:BackgroundThe Infraorbital nerve (ION) and its Canal are important landmarks during surgical approaches to the orbital floor and pterygopalatine fossa. However, variations in the anatomy of the inf...
Ricardo L. Carrau - One of the best experts on this subject based on the ideXlab platform.
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Surgical anatomy and nuances of the expanded transpterygoid approach to the pterygopalatine fossa and upper parapharyngeal space: a stepwise cadaveric dissection.
Acta neurochirurgica, 2020Co-Authors: Giuliano Silveira-bertazzo, Rafael Martinez-perez, Ricardo L. Carrau, Daniel M. PrevedelloAbstract:Superb knowledge of anatomy and techniques to remove the natural barriers preventing full access to the most lateral aspect of the skull base determines the ease of using the transpterygoid approach (ETPA) as the main gateway for all the coronal planes during endonasal surgeries. Throughout stepwise image-guided cadaveric dissections, we describe the surgical anatomy and nuances of the ETPA to the pterygopalatine fossa (PPF) and upper parapharyngeal space (UPPS). The ETPA represents a lateral extension of the midline corridor and provides a valuable route to access the PPF/UPPS. Major landmarks for this EEA are the Infraorbital Canal, sphenopalatine foramen, and vidian nerve. It comprises the removal of the palatine bone, posterior wall of the maxillary sinus, and PPF transposition to drill the pterygoid process.
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Surgical anatomy and nuances of the expanded transpterygoid approach to the pterygopalatine fossa and upper parapharyngeal space: a stepwise cadaveric dissection
Acta Neurochirurgica, 2020Co-Authors: Giuliano Silveira-bertazzo, Rafael Martinez-perez, Ricardo L. Carrau, Daniel M. PrevedelloAbstract:Background Superb knowledge of anatomy and techniques to remove the natural barriers preventing full access to the most lateral aspect of the skull base determines the ease of using the transpterygoid approach (ETPA) as the main gateway for all the coronal planes during endonasal surgeries. Methods Throughout stepwise image-guided cadaveric dissections, we describe the surgical anatomy and nuances of the ETPA to the pterygopalatine fossa (PPF) and upper parapharyngeal space (UPPS). Conclusion The ETPA represents a lateral extension of the midline corridor and provides a valuable route to access the PPF/UPPS. Major landmarks for this EEA are the Infraorbital Canal, sphenopalatine foramen, and vidian nerve. It comprises the removal of the palatine bone, posterior wall of the maxillary sinus, and PPF transposition to drill the pterygoid process.
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Anatomical Variants of the Infraorbital Canal: Implications for the Prelacrimal Approach to the Orbital Floor.
American journal of rhinology & allergy, 2019Co-Authors: Nyall R. London, Daniel M. Prevedello, Ricardo L. CarrauAbstract:BackgroundThe Infraorbital nerve (ION) and its Canal are important landmarks during surgical approaches to the orbital floor and pterygopalatine fossa. However, variations in the anatomy of the inf...
Giuliano Silveira-bertazzo - One of the best experts on this subject based on the ideXlab platform.
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Surgical anatomy and nuances of the expanded transpterygoid approach to the pterygopalatine fossa and upper parapharyngeal space: a stepwise cadaveric dissection.
Acta neurochirurgica, 2020Co-Authors: Giuliano Silveira-bertazzo, Rafael Martinez-perez, Ricardo L. Carrau, Daniel M. PrevedelloAbstract:Superb knowledge of anatomy and techniques to remove the natural barriers preventing full access to the most lateral aspect of the skull base determines the ease of using the transpterygoid approach (ETPA) as the main gateway for all the coronal planes during endonasal surgeries. Throughout stepwise image-guided cadaveric dissections, we describe the surgical anatomy and nuances of the ETPA to the pterygopalatine fossa (PPF) and upper parapharyngeal space (UPPS). The ETPA represents a lateral extension of the midline corridor and provides a valuable route to access the PPF/UPPS. Major landmarks for this EEA are the Infraorbital Canal, sphenopalatine foramen, and vidian nerve. It comprises the removal of the palatine bone, posterior wall of the maxillary sinus, and PPF transposition to drill the pterygoid process.
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Surgical anatomy and nuances of the expanded transpterygoid approach to the pterygopalatine fossa and upper parapharyngeal space: a stepwise cadaveric dissection
Acta Neurochirurgica, 2020Co-Authors: Giuliano Silveira-bertazzo, Rafael Martinez-perez, Ricardo L. Carrau, Daniel M. PrevedelloAbstract:Background Superb knowledge of anatomy and techniques to remove the natural barriers preventing full access to the most lateral aspect of the skull base determines the ease of using the transpterygoid approach (ETPA) as the main gateway for all the coronal planes during endonasal surgeries. Methods Throughout stepwise image-guided cadaveric dissections, we describe the surgical anatomy and nuances of the ETPA to the pterygopalatine fossa (PPF) and upper parapharyngeal space (UPPS). Conclusion The ETPA represents a lateral extension of the midline corridor and provides a valuable route to access the PPF/UPPS. Major landmarks for this EEA are the Infraorbital Canal, sphenopalatine foramen, and vidian nerve. It comprises the removal of the palatine bone, posterior wall of the maxillary sinus, and PPF transposition to drill the pterygoid process.
Yang Chi - One of the best experts on this subject based on the ideXlab platform.
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Decompression of the Infraorbital Canal to Treat Trigeminal Neuralgia(II)
Journal of Comprehensive Stomatology, 2004Co-Authors: Yang ChiAbstract:Objective: To evaluate the outcomes of the decompression of the Infraorbital Canal in treating trigeminal neuralgia(Ⅱ),and further to study the pathogenesis out of foramen ovale. Methods: 31 patients with the trigeminal neuralgia(Ⅱ) which the Infraorbital and anterior superior alveolar nerves are involved were treated by the decompression of the Infraorbital Canal. 30 patients were followed up. The period of follow-up was 6.1 months in average(1～10 months). Results: Among 30 patients, 50%(15/30) cases had an excellent response, 36.7%(11/30) cases had a good response, and 13.3%(4/30) cases had a poor response. The postoperative successful rate( excellent and good) was 86.7%(26/30). The relief time of 26 patients was in 24 hours after operation. Conclusions: Decompression of the Infraorbital Canal has higher successful rate and lower incident rate of the complications. It can be used as a first-chosen method to treat trigeminal neuralgia(Ⅱ) excluding the compression on other parts of trigeminal nerve. The clinic experiences also support the hypothesis that the compression in bone Canal/foramen can also induce trigeminal neuralgia.
Mihai Săndulescu - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional anatomy of the transantral intraseptal Infraorbital Canal with the use of cone-beam computed tomography
Folia morphologica, 2019Co-Authors: Laura Cârstocea, Mugurel Constantin Rusu, Cristiana Pascale, Mihai SăndulescuAbstract:The transantral or ectopic Infraorbital Canal (IOC) courses diagonally through the maxillary sinus (MS), thereby being exposed to risk during a number of surgical procedures. A few prior reports have presented evidence of a septa-embedded IOC, albeit only on single-plane slices. We identified this extremely rare variation of the IOC during a retrospective study of the cone-beam computed tomography files of 2 patients. In the first case, which involved a 34-year-old female patient, the Canals and septa within the MS were bilaterally asymmetrical. On the right side, the sinus roof was attached to a short transverse septum that was traversed by the IOC, while the left sinus featured an oblique large septum that divided it into antero-superior and posterior chambers. The left IOC was embedded within the septum rather than within the orbital floor above the septum. In the second case, which concerned a 36-year-old male patient, the left MS featured an almost completely oblique/vertical septum that divided it into anterior and posterior chambers and also embedded the respective IOC, which was thus absent from the orbital floor. In both cases, Infraorbital recesses in the anterior chambers of the MS were found that, if not documented on three-dimensional (3D) renderisations, could have been misidentified as Infraorbital (Haller) cells. To the best of our knowledge, this is the first report to document the 3D anatomy of an extremely rare variant, namely a septum-embedded transantral IOC. Such a variant, if not adequately documented preoperatively, could divert the transmaxillary corridors down false paths or else expose the IOC to damage during surgical procedures involving access to tumours.
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Air spaces neighbouring the Infraorbital Canal.
Morphologie : bulletin de l'Association des anatomistes, 2019Co-Authors: Laura Cârstocea, Mugurel Constantin Rusu, D.Ş. Mateşică, Mihai SăndulescuAbstract:Summary Objective The Infraorbital Canal (IOC) courses through the roof of the maxillary sinus (MS). Different grading systems concerning the topography of the IOC have been proposed. Further, it has been suggested that a transantral IOC would be morphologically related to Haller's cells (HCs). However, we hypothesized that this is not necessarily the case. Hence, we aimed to study the anatomical possibilities of the air spaces located medially to the IOC. Materials and methods The cone-beam computed tomography (CBCT) files of 40 adult patients were retrospectively evaluated. Results The transantral type of IOC was found in 32.5% of patients. The Infraorbital recesses of the MS were found medial to the IOC in 20% of patients. As referred to the nasolacrimal Canal, these recesses were either prelacrimal (appearing as false isolated air cells) or retrolacrimal (appearing as false HCs). True HCs were found in 10% of patients. They were located medial to the IOC and they drained into the ethmoidal infundibulum (EI), which was distinct from the MS drainage. In 15% of patients, aerated nasolacrimal ducts (NLDs) were found anterior to the EI and medial to the antral angle. They were capable of masquerading either a HC or an Infraorbital recess of the MS. Conclusion Previous classifications of the IOC, which related it to HCs, were reviewed and the evidence was found to be insufficient to assess the HC-related topography of the IOC. Therefore, to achieve the accurate anatomical identification of the air spaces neighbouring the IOC, the Infraorbital recesses of the MS, the HCs, and the aerated NLDs should be carefully discriminated within the antero-supero-medial antral angle.
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Infraorbital Canal bilaterally replaced by a lateroantral Canal
Surgical and radiologic anatomy : SRA, 2015Co-Authors: Mugurel Constantin Rusu, Mihai Săndulescu, O. C. IlieAbstract:The Infraorbital Canal (IOC) normally courses above the maxillary sinus in the orbit floor. During a retrospective study of cone beam computed tomography (CBCT) scans, we found a previously unknown variant of the IOC. The IOCs were absent, being replaced by lateroantral Canals coursing around and not above the maxillary sinus to open at Infraorbital foramina which were located above the second upper premolar teeth. On coronal multiplanar reconstructions, the lateroantral Canals were located anatomically at the outer limit of the zygomatic recess of each maxillary sinus, while the upper wall of the sinus was devoid of any Canal. Such rare variant should be kept in mind by dental practitioners and surgeons, as it can determine modifications of common procedures. In this regard, the anatomy of maxilla, as well as mandible, should be evaluated in CBCT on a case-by-case basis.