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    Evaluation of the effects of different hemostatic agent applications on mental nerve
    (Springer Science and Business Media Deutschland GmbH, 2022) Adak, Berat Metin; Laçin, Nihat; Şimşek, Fatma; Uysal, Ersin; Soylu, Fahri Emrah; Özkan, İrem
    Purpose: Evaluating the effect of ABS (Ankaferd Blood Stopper®), Tranexamic Acid (Transamin®) and Thrombin-Containing Hemostatic Matrix (Floseal®) on the mental nerve of rats by using histopathologic and immunohistochemical analyses. Materials and methods: 40 Wistar Albino rats were used. Rats were randomly selected into 4 groups as Control (G1), ABS (G2), Tranexamic Acid (G3) and Thrombin-Containing Hemostatic Matrix (G4). In the control group G1, the left mental nerve was exposed and 0.3 ml of sterile saline was applied for 5 min, then closed with suture. In the other three groups, the left mental nerve was exposed and 0.3 ml ABS, Tranexamic Acid and Floseal was applied to groups, respectively. After 5 min, wounds were closed with suture. Immunohistochemical and histopathologic examinations were performed on mental nerves after 28 days. Results: The total histopathologic and immunohistochemical semiquantitative scores were significantly higher in ABS (G2) compared to Control (G1), Tranexamic Acid (G3) and Thrombin-Containing Hemostatic Matrix (G4) (P < 0.05). Myelin thickness were significantly lower in G2 compared to G1, G2 and G3 (P < 0.05). G3 has the most reliable results compared to G2 and G4 (P < 0.05). Conclusion: The study results suggest that ABS has neurotoxic effects and should not be used close to the nerve, and thrombin-containing hemostatic matrix should be used carefully. Tranexamic acid, on the other hand, was found to be the most reliable hemostatic agent for use in close proximity to neural tissues. Further studies are required to determine the efficacy of the hemostatic agents on peripheral nerve degeneration.
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    Evaluation of the Regeneration Effects of Systemically Applied Methylprednisolone and Vitamin B12 on Mental Nerve Crush Injury
    (Turkish Neurosurgical Society, 2024) Kara, Cigdem; Lacin, Nihat; Adak, Berat Metin; Kara, Alper; Tunik, Selcuk; Uysal, Ersin; Soylu, Fahri Emrah
    AIM: To evaluate the effects of methylprednisolone and vitamin B12 injection on the regeneration of the nerves after a mental nerve crush injury. MATERIAL and METHODS: A total of 40 albino Wistar rats have been randomly divided into four groups: Ynt: ÖNEMLİ: Turkish Neurosurgery_JTN 43470_proof reading group 1 (n=10): crush-like nerve damage was created by pinching the left mental nerve for 60 s with an aneurysm clip and intraperitoneally administered 1 ml of saline for 14 days; group 2 (n=10): the left mental nerve was pinched for 60 s with an aneurysm clip and intraperitoneally administered 2 mg/kg of methylprednisolone for 14 days; group 3, experimental group (n=10): the left mental nerve was pinched for 60 s with an aneurysm clip and intraperitoneally administered 2 mg/kg of vitamin B12 for 14 days; and group 4, experimental group (n=10): the left mental nerve was pinched for 60 s and intraperitoneally administered 2 mg/kg of methylprednisolone and 2 mg/kg of vitamin B12 for 14 days. All rats were sacrificed on the 28th postoperative day, and histopathological evaluation was performed. RESULTS: Nerve damage was higher in the control group than in other groups (p<0.05). When Neural Cell Adhesion Molecule (NCAM) expression levels were compared, no major differences were observed between the methylprednisolone and control groups (p>0.05). The B12 and B12+methylprednisolone groups reached significantly higher NCAM expression levels compared to the control and methylprednisolone groups. When the myelin basic protein (MBP) expression levels were compared (p<0.05), the MBP expression was significantly higher in all experimental groups than in the control group (p<0.05). CONCLUSION: Systemic vitamin B12 and methylprednisolone administration effectively supported remyelination in the crushed mental nerve by increasing Schwann cell proliferation and differentiation. © (2024), (Turkish Neurosurgical Society). All rights reserved.