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    Accurate course and relationships of the intraorbital part of the ophthalmic artery in the sagittal plane
    (Georg Thieme Verlag Kg, 2007) Erdogmus, S.; Govsa, F.
    Introduction: Knowledge of variations in the course and distribution of the intraorbital part of ophthalmic artery (OA) is necessary for the diagnosis and treatment of anterior cranial and orbital disorders. Material: 38 human cadaver dissections to demonstrate the microsurgical anatomy of the intraorbital part of the OA were studied in three stages, considering its neighbourhood with the optic nerve in the sagittal plane. Results: The first part of the OA was located on the inferolateral aspect of the optic nerve in 89.47%. The diameter and the length of the first part of the OA were 1.69 +/- 0.34 mm and 7.58 +/- 0.89mm. 73.68% of the cases crossed the optic nerve superiorly, and 26.31 % inferiorly. The diameter and length of the second part of the OA were as 1.52 +/- 0.29mm and 4.12 +/- 0.85 mm. The diameter and length of the third part of the OA were 1.07 +/- 0.18 mm and 4.12 +/- 0.85 mm. The first branch of the intraorbital part of the OA was the central retinal artery in 26.31 % of the specimens. Conclusion: A better understanding of the vascular anatomy of the orbit should allow for the modification of surgical techniques to reduce bleeding during biopsy or excision of orbital structures.
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    Anatomical Foundations of Lower Eyelid Revitalization: Letter on Anatomical Basis for the Lower Eyelid Rejuvenation
    (Springer, 2023) Govsa, F.; Pinar, Y.
    [No abstract available]
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    Evaluation of the effects of using 3D - patient specific models of displaced intra - articular calcaneal fractures in surgery
    (Elsevier Ltd, 2020) Ozturk, A.M.; Ozer, M.A.; Suer, O.; Derin, O.; Govsa, F.; Aktuglu, K.
    Background: It was aimed to compare conventional surgery and three-dimensional (3D) model-assisted surgery used in the treatment of calcaneal fractures. Materials & Methods: A total of 37 patients with unilateral calcaneal fractures were randomly divided into two groups as a conventional surgery group (n: 19) and a 3D model-assisted surgery group (n: 18). The preoperative, postoperative and last follow up angles of the Bohler and Gissane, calcaneal width and facet height were measured. The duration of the operation, blood loss volume, fluoroscopy usage, instrumentation time for both groups were recorded. Finally, the follow-up AOFAS scores were evaluated. A questionnaire was used to determine the perceptions of the resident doctors about the 3D model. Results: The duration of the operation, blood loss volume, fluoroscopy usage, instrumentation time for 3D model-assisted surgery group were 83.3 ± 4.6 minutes, 83.6 ± 4.6 ml, 6.8 ± 1.4 times and 13.0 ± 0.8 weeks, and as for conventional group they were 130.0 ± 5.8 minutes, 105.1 ± 5.6 minutes, 11.7 ± 1.5 ml, 22.2 ± 2.4 times and 13.3 ± 0.8 weeks, respectively (p < 0.0001). The both groups significantly restored Bohler angle, Gissane angle, calcaneal width and calcaneal facet height after operation (p < 0.0001). The 3D model-assisted group was significantly more succesful in restoration and protection of achieved correction of calcanel facet height (p < 0.0001). The difference was determined among the groups at the final follow-up examination with respect to the amount of change according the values achieved post-op. were significant in Bohler angle (p < 0.001), calcaneal facet height (p < 0.0001) and calcaneal widht (p = 0.017). There was no significant difference between AOFAS scores of the two groups at last follow-up. Resident doctors exhibited high scores of overall satisfaction with the use of a 3D printing model. Conclusions: Compared to the conventional group, the 3D model-assisted group provide successful intervention and reduce operation, instrumentation time and the fluoroscopy usage with less blood loss. Performing 3D-assisted surgery helps the quality of reduction during the surgery and stability of internal fixation to protect achieved reduction at follow-up more succesfully. © 2020