THE EFFECTS OF 3D MODELING ON PLANNING OF MAXILLOFACIAL SURGERY: A Preliminary CBCT STUDY

Abstract: Objectives: The aim is to evaluate the contribution of 3D modeling data to the planning of the maxillofacial surgery and to determine the indications of 3D modeling. Materials and Methods: In this preliminary study, CBCT images of 2 patients with the Kodak 9000 3D (Kodak Carestream Health, Trophy, France) system were used. The segmentation procedures of the pathologies were performed manually, and was followed by the construction of the 3D models. A questionnaire was prepared by consensus of the research team, including the parameters which are critical in preoperative maxillofacial surgery planning. Five oral and maxillofacial surgeons independently evaluated both the traditional CBCT data and 3D model assisted data under the same viewing conditions. The extent of their decision change was scored using a 2 point Likert scale. Conventional (pre 3D model) versus 3D model assisted data (post 3D model) scores were analyzed. Pair-wise comparisons were completed using Fisher’s exact test (P < 0.05). Kappa was used to measure inter-observer agreement. Results: In both of the evaluation sessions (pre and post 3D model), operation time, defect size and complication risk factors showed the highest variation for both patients. The difference between the decision change proportions for the variables of pre and post 3D model sessions were not statistically significant (p>0.05). Except 2 observers with excellent agreement for both evaluations (p=0.036), the agreement rates were fair without statistical significance. Conclusions: The results confirmed that personalized 3D modeling constructed by CBCT data may lead to changes in surgical treatment planning protocol of complex cases

Relationship between COVID-19 and Male Sexual Dysfunction? A Prospective, Multicentric Study

Background: Sexual function is an excellent marker of psychological, systemic, and specifically vascular performance. Endothe-lial dysfunction is the main determinant of coronavirus disease 2019 (COVID-19) symptoms. Considering the adverse effects of the COVID-19 pandemic on psychological and sexual functions, we hypothesized potential differences and underlying factors if there is any erectile function and premature ejaculation status of male patients with COVID-19 by comparing both with the control group.Methods: Hospitalized male patients diagnosed with COVID-19 pneumonia were evaluated. Male patients who applied to the Urology outpatient clinic were the control group. All participants completed the International Index of Erectile Function Form -15 (IIEF-15) and gave information regarding their premature ejaculation (PE) status if present. COVID-19 patients were called by phone to fill in the IIEF-15. Their PE status was questioned on the 45th and 90th days after discharge. The following param-eters were in the data records: Age, comorbidity, length of hospital stay, treatment, oxygen saturation, pulmonary involvement, white blood cell (WBC), C-reactive protein (CRP), ferritin, fibrinogen, D-dimer, and sedimentation values .Results: The study had 253 participants, including 168 COVID-19 patients and 85 volunteers as the control group. The number of PE cases was less, whereas erectile dysfunction (ED) cases were more in the COVID-19 patient group in comparison to the control group in the pre-pandemic period (p = 0.00) (p = 0.00). In the post-pandemic period, PE developed in 13 more COVID-19 patients on the 45th and 90th days (p = 0.00). The IIEF-15 scores of COVID-19 patients decreased by 4-point in the short term and by 3-point in the long term (p = 0.002). Age and sedimentation were responsible for the difference in PE status. On the other hand, comorbidity, length of hospital stay, treatment type, WBC, D-dimer, ferritin, CRP levels, and pulmonary infiltration were responsible for the difference in ED.Conclusions: Based on our findings, we can say that we have enough evidence to suspect COVID-19 sequelae can affect male sexual health. After the pandemic, male patients with andrological problems should have enough time to feel more comfortable and their organic and psychogenic conditions should be optimized

FİBER POST SİMANTASYONUNDA KULLANILAN SELF-ADEZİV REZİN SİMANLARIN MİKROSIZINTILARININ KARŞILAŞTIRILMASI

Aim: The aim of this study was to compare the microleakage of four self-adhesive resin cements used for fiber post cementation with fluid filtration method. Material and Method: In the study, 50 upper human canine teeth extracted for periodontal reasons were used. The root lengths of the teeth were mesured and standardized. Root canals were enlarged with rotary instruments (Protaper, Dentsply Maillefer, Ballaquies, Switzerland) and filling was achieved using lateral compaction technique. The specimens were randomly assigned to 5 groups (n=10). The fiber post (Exacto Glass Fiber posts, Angelus Industria de Produtos Odontologicos S/A, Londrina-PR-Brasil) cementations are completed with the fallowing materials: Variolink II Professional Pack (Ivoclar Vivadent, Liechtenstein) (Control), G-Cem Automix (GC, Tokyo, Japan), Panavia SA Cement (Kuraray, Okayama, Japan), Smart Cem 2 (Dentsply DeTrey GmbH, Konstanz, Germany) and Rely X U200 (3M ESPE, Neuss, Germany). The measurement of microleakage was performed at 2nd, 4th, 6th and 8th minutes. The data was analyzed by ANOVA and Tukey tests (p0.05). Results: The best results were obtained in Rely X U200 and Panavia SA Cement groups, while the most leakage was seen in G-Cem Automix and Smart Cem 2 groups (p0,05). There was statistically significant difference between Rely X U200 and Panavia SA Cement groups compared to the control group (p0,05). The control group was found to have statistically less microleakage than G-Cem Automix and Smart Cem 2 groups (p0,05). Conclusion: From the point of microleakage, some self adhesive resin cements used for fiber post cementation were found to be more reliable than the control group materialAmaç: simantasyonunda kullanılan dört self-adeziv rezin simanın mikrosızıntılarını sıvı filtrasyon yöntemi ile karşılaştırmaktır. Gereç ve Yöntem: Çalışmada, periodontal nedenlerle çekilmiş 50 adet insan üst çene kanin dişi kullanıldı. Dişlerin kök boyları ölçülerek standardize edildi. Dişler döner eğelerle (Protaper, Dentsply Maillefer, Ballaquies, İsviçre) genişletilip, lateral kompaksiyon yöntemiyle dolduruldu. Örnekler rastgele 5 gruba ayrıldı (n=10). Fiber post (Exacto Glass Fiber posts, Angelus Industria de Produtos Odontologicos S/A, Londrina-PR-Brezilya) simantasyonları şu materyallerle yapıldı: Variolink II Professional Pack (Ivoclar Vivadent, Liechtenstein) (Kontrol), G-Cem Automix (GC, Tokyo, Japonya), Panavia SA Cement (Kuraray, Okayama, Japonya), Smart Cem 2 (Dentsply DeTrey GmbH, Konstanz, Almanya) ve Rely X U200 (3M ESPE, Neuss, Almanya). Mikrosızıntı ölçümleri 2, 4, 6 ve 8. dakikalarda gerçekleştirildi. Veriler istatistiksel olarak ANOVA ve Tukey testleri ile değerlendirildi (p0.05). Bulgular: En iyi sonuçlara Rely X U200 ve Panavia SA Cement'te rastlanırken, en fazla mikrosızıntı da G-Cem Automix ve Smart Cem 2'de gözlendi (p0,05). Rely X U200 ve Panavia SA Cement grupları, kontrol grubuyla karşılaştırıldığında istatistiksel olarak anlamlı derecede daha sızdırmaz sonuçlar gösterdi (p0,05). G-Cem Automix ve Smart Cem 2 grupları kontrol grubuyla karşılaştırıldığında, kontrol grubu bu gruplardan istatistiksel olarak daha sızdırmaz bulundu (p0,05). Sonuç: Fiber post simantasyonunda kullanılan bazı self-adeziv rezin simanlar, kontrol grubu materyaliyle karşılaştırıldığında mikrosızıntı açısından daha güvenilir bulund

The effect of tank volumes on survival of gilthead seabream (Sparus aurata L.,1758) from hatching to the first grading in intensive culture systems

In this study, the effect of tank volumes on survival rates, total length and total width of gilthead seabream (Spams aurata I., 1758) larvae from hatching to the first grading were tested for periods of 0-38 days The percentage of fertilized buoyant eggs were generally higher than 90-95%. Larvae were reared intensively in 5 and 15 tons tanks under a constant photoperiod 24 h light, and fed initially on rotifers, followed by Artemia nauplii and Artemia metanauplii. A green water technique was applied using Chlore/la sp. and Isochrysis galbana at a density of $1x10^6$ cells. $ml^{-1}$ . Survival and growth rates were determined for all volumes in triplicate. Mean survival rates in 5 tons tank (12.56;plusmn;0.47%) was significantly higher than that in 15 tons tank (9.83;plusmn;0.76%) (P;lt;0.05). Mean total length and width of the larvae at day 38 after were similar in both tanks (Mean length, 10.35;plusmn;0.22 mm and 10.14;plusmn;0.52 mm; width, 2.15;plusmn;0.19 mm.and 2.11;plusmn;0.24 mm, respectively).Bu çalışmada, çipura (Sparus aurata L. 1758) larvalarının yaşama ve büyüme oranları üzerinde tank hacimlerinin etkileri, 0-38 günler için test edilmiştir. Döllenmiş yumurta oranı yüksek olup%90-95 arasındadır. Larvalar intensif koşullarda 5 ve 15 tonluk tanklarda 24 saatlik aydınlık periyotta yetiştirilmiş, ilk yem olarak rotifera daha sonra ise Artemia nauplii ve Artemia metanauplii ile besleme yapılmıştır. Yeşil su tekniği olarak Chlorella sp. ve Isochrysis ga/bana türleri $1x10^6$ hücre. $mL^{-1}$ olarak kullanılmıştır. Yaşama oranları ve gelişim oranları 5 ve 15 tonluk tanklar için değerlendirilmiştir. Beş tonluk tanklardaki ortalama yaşama oranı (% 12,56±0,47) on beş tonluk tanklardaki yasama oranından (% 9,83±0,76) önemli derecede yüksek bulunmuştur (P0.05). Kuhjçkalamadan sonraki 38. günde, 5 ve 15 tonluk tanklarda yetiştirilen larvalarda total boy ve en değerleri benzer bulunmuştur (Boy sırasıyla 10.35±0.22 mm; 10,14±0,52 mm ve en ortalamaları sırasıyla, 2.15±0.19 mm; 2.11±0.24 mm)