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    Changes in maxillary perfusion following Le Fort I osteotomy in orthognathic surgery
    (2021) Sancar, Bahadir; Unluturk, Burak; Musulluoglu, Ferhat
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    Changes in maxillary perfusion following Le Fort Iosteotomy in orthognathic surgery
    (2021) Sancar, Bahadir; Ünlütürk, Burak; Musulluoglu, Ferhat
    Le Fort I osteotomy is a surgical procedure that can be used in adaptation of abnormally positioned jaws, skeletal malocclusions,aesthetic operations, treatment of obstructive sleep apnea, access to tumors with intracranial extensions and in other types of skullbase surgery. The main problems in Le Fort I osteotomy which is performed using various techniques directed to the maxilla areintraoperative bleeding and impaired blood supply of the osteotomized segment. Results of studies evaluating the perfusion of themaxilla during and after Le Fort I osteotomy were reviewed in the present study.Vascular events occurring during surgery should be better acknowledged in order to prevent complications such as intraoperativeinsufficient maxillary perfusion or postoperative bleeding. Maxillary perfusion after maxillary downfracture depends on palatal andposterior buccal soft tissue pedicles. The conclusions from previous extensive studies on maxillary blood supply after downfracturehave shown that a properly performed single-segment Le Fort I osteotomy is predictable and safe. However, factors such asmultisegmentalization of the maxilla, traction of the pedicle as a result of significant dentoosseous reposition, routine ligation ortraction of descending palatine artery, hypotensive anesthesia, transverse laceration in the palatal soft tissues, compression, andpre-existing scar tissue adversely affect the blood flow from these pedicles to the maxillary hard and soft tissues. As a result, it can be suggested that complications related to intraoperative and postoperative perfusion of maxilla in Le Fort Iosteotomy are rare and this surgery is safe.
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    Investigation of the effect of oral and internal bisphosphonate use on bone density in the jaws in patients with osteoporosis in panoramic radiography
    (Elsevier Science Inc, 2023) Musulluoglu, Ferhat; Alan, Hilal; Yilmaz, Serkan
    Objectives: This study aims to quantitatively evaluate the effects of bisphosphonate use duration and route of administration on mandibular cortical and trabecular bone in postmenopausal women. Study design: Ninety postmenopausal women over the age of 50 were included in this study. Trabecular bone density was specified numerically by fractal dimension (FD) in the region of interest selected on the panoramic radiograph. The width of the mandibular cortical (MCW) bone under the mental foramen of the mandible was measured. Mann-Whitney U test was used for parameters that did not show a normal distribution. Spearman rho correlation test was used to determine the relationship between continuous measurement parameters. Results: It was observed that FD and MCW of dentate and edentate individuals using bisphosphonate were statistically significantly lower than those of healthy individuals (P < .05). There was no significant correlation was found between the duration of use of bisphosphonates and the fractal values obtained from the relevant regions of the mandible (P > .05). Conclusion: Fractal dimension was found to be lower in oral bisphosphonate use than in intravenous bisphosphonate use. The width of the mandibular cortical bone values was found to be lower in individuals using bisphosphonate than in healthy individuals. Fractal dimension and MCW may benefit clinicians as quantitative parameters in panoramic radiography in the diagnosis of osteoporosis.