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Öğe Bone decortication rate and guided bone regeneration under an occlusive titanium dome: Micro-CT analysis(2019) Acar, Ahmet Huseyin; Yolcu, UmitAim: We aimed to evaluate how the rate of bone decortication influences guided bone regeneration. Material and Methods: Twenty-four titanium domes were placed bilaterally on the parietal bones of sixteen New Zealand rabbits after drilling the bone with a small round burr to induce bleeding from the marrow space (Group A: one hole; Group B: three holes; Group C: nine holes), while the bone surface was left intact at the control sites (Control group). Each group included six samples. Bone decortication rates were approximately 4% in group A, 12% in group B, and 36% in group C. All rabbits were killed after a 12- week bone-healing period, and results were evaluated by micro-CT. Results: Both newly generated tissue formation and mineralized bone formation were higher in all experimental groups than in the control group (P < 0.05), increasing in proportion to the increasing number of holes to a peak in Group C. Conclusion: Bone decortication improves mineralized bone and newly regenerated augmented tissue during guided bone regeneration. Bone decortication can be used as an integral part of guided bone regeneration procedures. Also more bone decortication rate seems to be more effective.Öğe Bone regeneration by low-level laser therapy and low-intensity pulsed ultrasound therapy in the rabbit calvarium(Pergamon-Elsevier Science Ltd, 2016) Acar, Ahmet Huseyin; Yolcu, Umit; Altindis, Sedat; Gul, Mehmet; Alan, Hilal; Malkoc, SiddikObjective: We evaluated the efficacy of low-level laser therapy (LLLT) and low-intensity pulsed ultrasound (LIPUS), alone and in combination, in triggering new bone formation. Study design: Sixteen New Zealand white rabbits were given two calvarial defects by using a 6-mm trephine bur, then divided into four treatment groups: control, LLLT, LIPUS, and LLLT + LIPUS. The LLLT and LIPUS groups were treated three times a week for two weeks. The LLLT + LIPUS group received each treatment on the same day, 12 h apart, three days a week for two weeks. The animals were sacrificed after three weeks. Results: LLLT and LIPUS, alone and in combination, enhanced new bone formation in comparison to the untreated controls after three weeks (P < 0.05); the combined therapy did not produce an additive effect. Conclusions: Our results demonstrate the efficacy of LLLT or LIPUS in triggering bone regeneration. Therapeutic dose and duration requires further study. (C) 2015 Elsevier Ltd. All rights reserved.Öğe The investigation of effects of proton pump inhibitors(2018) Asutay, Fatih; Atalay, Yusuf; Acar, Ahmet HuseyinAim: Proton pump inhibitors (PPI) have been widely used throughout the world. The effects of the PPIs on bone mineral density (BMD) is important for oral surgeons. The aim of this study was evaluate alterations in bone mineral density in patients using PPI. Material and Methods: A total of 92 patients were enrolled in the study and were separated into 4 groups (24 in control group, 22 in Lansoprazole group, 24 in Pantoprazole group and 22 in Esomeprazole group). Hounsfield Unit scores were measuredseparately of the incisor, canine, premolar, molar and tubule regions in the jaws with computed tomography. The measurement area in the dental regions was defined as an area of 2mm2 at least 2mm from the apex of the teeth. All data were collected and statistically analysed. Results: There was no significant difference between the groups in respect of mean age. There were no significant differences between the control and the study groups. Also no significant difference was found among the study groups. Conclusion: These data revealed that there were no correlations between decreased maxillary bone mineral density and proton pump inhibitor use. Further studies with more extensive samples should take into consideration drug doses and the period of use.Öğe Is Conservative Surgical Treatment Sufficient to Treat Unicystic Mural Ameloblastoma in Infant?(Lippincott Williams & Wilkins, 2015) Acar, Ahmet Huseyin; Yolcu, Umit; Erdem, Necip Fazil; Asutay, FatihAmeloblastoma, a benign neoplasm derived from odontogenic epithelium, is an aggressive and locally invasive tumor. It represents 11% of all odontogenic tumors and 1% of all oral odontogenic epithelial tumors. In this case report, a 20-month-old boy was referred to our clinic with complaint of collapse in his symphysis region of the mandible. Radiographic examination revealed unilocular radiolucency in this region. The lesion was enucleated with 1 tooth germ under general anesthesia and diagnosed as mural unicystic ameloblastoma by histopathologic examination. After the surgery, complete healing was obtained clinically and radiographically. No sign of recurrence has been seen during the follow-up period of 4.5 years. To our knowledge, this was the second youngest case of ameloblastoma in the English literature. However, it is the youngest case of ameloblastoma that occurred in an infant boy.Öğe Micro-computed tomography and histomorphometric analysis of the effects of platelet-rich fibrin on bone regeneration in the rabbit calvarium(Pergamon-Elsevier Science Ltd, 2015) Acar, Ahmet Huseyin; Yolcu, Umit; Gul, Mehmet; Keles, Ali; Erdem, Necip Fazil; Kahraman, Sevil AltundagObjective: The present study aimed to investigate the effectiveness of platelet-rich fibrin (PRF) on bone regeneration when used alone or in combination with hydroxyapatite (HA)/beta-tricalcium phosphate (beta TCP). Design: In this study, 20 New Zealand white rabbits were used and four calvarial defects were prepared in each animal. PEP, Straumann (R) Bone Ceramic (SBC), or PEP + SBC was applied to the defects; one defect was left untreated as a control. Ten rabbits were sacrificed at week 4(T-1) and 10 at week 8 (T-2). After micro-computed tomography (micro-CT) scanning, the samples were sent for histological and histomorphometric analysis to evaluate and compare the volume and area of regenerated bone. Results: Histomorphometric and micro-CT analysis showed that both PEP and SBC significantly increased bone regeneration at T-1 and T-2 (P < 0.01). When PEP was used in combination with HA/beta TCP, a further significant increase in new bone formation was observed at T-1 and T-2 compared with that when PRF or SBC was used alone (P < 0.01). Conclusions: PRF has a positive effect on bone formation when used alone and in combination with HA/beta TCP. (C) 2014 Elsevier Ltd. All rights reserved.
