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| 1 | Evaluation of diagnostic findings and scoring systems in outcome prediction in acute pancreatitis显示文摘AIM: To determine factors related to disease severity, mortality and morbidity in acute pancreatitis. METHODS: One hundred and ninety-nine consecutive patients were admitted with the diagnosis of acute pancreatitis (AP) in a 5-year period (1998-2002). In a prospective design, demographic data, etiology, mean hospital admission time, clinical, radiological, biochemical findings, treatment modalities, mortality and morbidity were recorded. Endocrine insuffi ciency was investigated with oral glucose tolerance test. The relations between these parameters, scoring systems (Ranson, Imrie and APACHE Ⅱ) and patients' outcome were determined by using invariable tests and the receiver operating characteristics curve. RESULTS: One hundred patients were men and 99 were women; the mean age was 55 years. Biliary pancreatitis was the most common form, followed by idiopathic pancreatitis (53/ and 26/, respectively). Sixty-three patients had severe pancreatitis and 136 had mild disease. Respiratory rate > 20/min, pulse rate > 90/min, increased C-reactive protein (CRP), lactate dehydrogenase (LDH) and aspartate aminotransferase (AST) levels, organ necrosis > 30/ on computed tomography (CT) and leukocytosis were associated with severe disease. The rate of glucose intolerance, morbidity and mortality were 24.1/, 24.8/ and 13.6/, respectively. CRP > 142 mg/L, BUN > 22 mg/dL, LDH > 667 U/L, base excess > -5, CT severity index > 3 and APACHE score > 8 were related to morbidity and mortality. CONCLUSION: APACHE Ⅱ score, LDH, base excess and CT severity index have prognostic value and CRP is a reliable marker for predicting both mortality and morbidity. | Ekrem Kaya Adem Dervi■o■lu Cafer Polat | 2007 | World Journal of Gastroenterology2007，13，22： | 64 |
| 2 | Gastrointestinal bezoars: A retrospective analysis of 34 cases显示文摘AIM: Bezoars (BZ) are the most common foreign bodies of gastrointestinal tract. Clinical manifestations vary depending on the location of BZ from no symptoms to acute abdominal syndrome. When located in small bowel, they frequently cause small bowel obstruction (SBO). We aimed to present our experience by reviewing literature.METHODS: Thirty-four patients with gastrointestinal BZ were presented. The data were collected from hospital records and analyzed retrospectively. Morbidity and mortality rates were statistically analyzed between the subgroups according to SBO and endoscopic or surgical treatment modalities.RESULTS: The 34 patients had phytobezoars (PBZ). Two patients with mental retardation and trichotillomania had trichobezoars (TBZ). More than half of them (55.88%) had previous gastric surgery. Also most of them had small bowel bezoars resulting in obstruction. Surgical and endoscopic morbidity rates were 32.14% and 14.28% respectively.The total morbidity rate of this study was 29.41%. Four patients in surgically treated group died. There was no death in endoscopically treated group. The total and surgical mortality rates were 11.76% and 14.28% respectively. The differences in morbidity and mortality rates between the subgroups were not statistically significant.CONCLUSION: BZ are commonly seen in stomach and small intestine. SBO is the most common complication.When uncomplicated, endoscopic or surgical removal can be applied easily. | Kenan Erzurumlu Zafer Malazgirt Ahmet Bektas Adem Dervisoglu Cafer Polat Gokhan Senyurek Ibrahim Yetim Kayhan Ozkan | 2005 | World Journal of Gastroenterology2005，11，12： | 33 |
| 3 | Geological Evidence for the Operation of Plate Tectonics throughout the Archean:Records from Archean Paleo-Plate Boundaries显示文摘Plate tectonics describes the horizontal motion of rigid lithospheric plates away from midoceanic ridges and parallel to transforms, towards deep-sea trenches, where the oceanic lithosphere is subducted into the mantle. This process is the surface expression of modern-day heat loss from Earth. One of the biggest questions in Geosciences today is 'when did plate tectonics begin on Earth' with a wide range of theories based on an equally diverse set of constraints from geology, geochemistry, numerical modeling, or pure speculation. In this contribution, we turn the coin over and ask 'when was the last appearance in the geological record for which there is proof that plate tectonics did not operate on the planet as it does today'. We apply the laws of uniformitarianism to the rock record to ask how far back in time is the geologic record consistent with presently-operating kinematics of plate motion, before which some other mechanisms of planetary heat loss may have been in operation. Some have suggested that evidence shows that there was no plate tectonics before 800 Ma ago, others sometime before 1.8–2.7 Ga, or before 2.7 Ga. Still others recognize evidence for plate tectonics as early as 3.0 Ga, 3.3–3.5 Ga, the age of the oldest rocks, or in the Hadean before 4.3 Ga. A key undiscussed question is: why is there such a diversity of opinion about the age at which plate tectonics can be shown to not have operated, and what criteria are the different research groups using to define plate tectonics, and to recognize evidence of plate tectonics in very old rocks? Here, we present and evaluate data from the rock record, constrained by relevant geochemical-isotopic data, and conclude that the evidence shows indubitably that plate tectonics has been operating at least since the formation of the oldest rocks, albeit with some differences in processes, compositions, and products in earlier times of higher heat generation and mantle temperature, weaker oceanic lithosphere, hotter subduction zones caused by more slab-melt generation, and under different biological and atmospheric conditions. | Timothy M.Kusky Brian F.Windley Ali Polat | 2018 | Journal of Earth Science2018，29，6： | 20 |
| 4 | Possible association of the 5-HTTLPR serotonin transporter promoter gene polymorphism with premature ejaculation in a Turkish population显示文摘我们与早泄(PE ) 在病人评估了血清素 transporter 基因(5-HTT ) 的遗传型在 PE 并且可能的 etiopathogenesis 决定基因因素的角色识别耐心的亚群。70 个 PE 病人和 70 控制的一个总数在这研究被包括。所有人是异性爱的,没有另外的混乱并且是结婚的任何一个或在一种稳定的关系中。PE 被定义为射精发生在阴道插入的 1 min 以内。从病人和控制的 Genomic DNA 用血清素 transporter 基因(5-HTTLPR ) 的倡导者区域的聚合酶链反应,和突变而产生之遗传的变化被分析被决定。5-HTTLPR (血清素 transporter 倡导者基因) 在 PE 病人对控制的遗传型如下被散布:L/L 16% 对 17% , L/S 30% 对 53% 并且 S/S 54% 对 28% 。我们为 5-HTTLPR 基因的三多型性检验了 haplotype 分析:LL, LS 和 SS。在 5-HTTLPR 基因的等位基因频率的适当被 Hardy-Weinberg 平衡用 2 测试分析。5-HTTLPR 基因的短(S) 等位基因是显著地在 PE 病人更经常比在控制(P < 0.05 ) 。我们建议 5-HTTLPR 基因在所有主要 PE 盒子的 pathophysiology 起一个作用。进一步的研究被需要评估在 5-HTTLPR 基因多型性和耐心的亚群之间的关系(例如主要、第二等的 PE ) 对选择血清素举起禁止者以及种族差别的回答。 | Emin Ozbek Ali I. Tasci Volkan Tugcu Yusuf O. Ilbey Abdulmuttalip Simsek Levent Ozcan Emre C. Polat Vedat Koksal | 2009 | Asian Journal of Andrology2009，11，3： | 19 |
| 5 | Internal biliary fistula due to cholelithiasis:A single-centre experience显示文摘AIM: To discuss about the perioperative problems encountered in patients with internal biliary fistula (IBF) caused by cholelithiasis. METHODS: In our hospital, 4 130 cholecystectomies were carried out for symptomatic cholelithiasis from January 2000 to March 2004 and only 12 patients were diagnosed with IBF. The perioperative data of these 12 IBF patients were analyzed retrospectively. RESULTS: The incidence of IBF due to cholelithiasis was nearly 0.3%. The mean age was 57 years. Most of the patients presented with non-specific complaints. Only two patients were considered to have IBF when gallstone ileus was observed during the investigations. Nine patients underwent emergency laparotomy with a pre-operative diagnosis of acute abdomen. In the remaining three patients, elective laparoscopic cholecystectomy was converted to open surgery after identification of IBF. Ten patients had cholecystoduodenal fistula and two patients had cholecystocholedochal fistula. The mean hospital stay was 13 d. Two wound infections, three bile leakages and three mortalities were observed. CONCLUSION: Cholecystectomy has to be performed in early stage in the patients who were diagnosed as cholelithiasis to prevent the complications like IBF which is seen rarely. Suspicion of IBF should be kept in mind, especially in the case of difficult dissection during cholecystectomy and attention should be paid in order to prevent iatrogenic injuries. | Arife Polat Duzgun Mehmet Mahir Ozmen Mehmet Vasfi Ozer Faruk Coskun | 2007 | World Journal of Gastroenterology2007，13，34： | 15 |
| 6 | Intrabiliary rupture: An algorithm in the treatment of controversial complication of hepatic hydatidosis显示文摘AIM: Intrabiliary rupture (IBR) is a common and serious compli-cation of hepatic hydatid cyst. The incidence varies from 1% to 25%. The treatment of IBR is still controversial. We aimed to design an algorithm for the treatment of hepatic hydatidosis with IBR by reviewing our cases.METHODS: Eight cases of IBR were analyzed retrospectively.Patients were evaluated according to age, sex, clinical findings, cyst number and stage, abdominal ultrasonography and CT-scan, surgical methods, complica-tions, results and coincidental diseases.RESULTS: Female/male ratio was 1/7. Mean age was 52.12±18.26 years (range 24-69 years). Right upper quadrant pain, flatulence, palpable hepatic mass were symptoms common in all patients. Cholestatic jaundice was found in four cases. In all patients, cyst evacuation and omento-plasty were performed, followed by either choledochod-uodenostomy, T-tube drainage, intracavitary suturing of the orifice, two cases in each. Whereas in two patients diagnosed post-operatively percutaneous drainage of biliary collection or ERCP and sphincteroplasty were added. Morbidity and hospital stay were higher in these cases.CONCLUSION: When the diagnosis of IBR can be done pre-or intra-operatively, morbidity decreases. If a biliary fistula is seen post-operatively, endoscopic procedures such as ERCP, sphincteroplasty or nasobiliary drainage can be applied. | Kenan Erzurumlu Adem Dervisoglu Cafer Polat Gokhan Senyurek Ibrahim Yetim Murat Hokelek | 2005 | World Journal of Gastroenterology2005，11，16： | 8 |
| 7 | Protective effect of low dose of melatonin against cholestatic oxidative stress after common bile duct ligation in rats显示文摘AIM: To investigate the role of oxidative injury and the effect of exogenous melatonin administration on liver damage induced by bile duct ligation (BDL), and second,to evaluate the role of nitric oxide (NO), a free oxygen radical, in oxidative injury.METHODS: Thirty-two Sprague-Dawley rats were assigned to four groups: sham operation (SO), BDL, BDL+melatonin,and BDL+vehicle. Cholestasis was achieved by double ligature of the common bile duct. Melatonin was injected intraperitoneally 500 μg/(kg.d) for 8 d. Hepatic oxidative stress markers were evaluated by changes in the amount of lipid peroxides, measured as malondialdehyde (MDA),and reduced GSH. Total nitrite (NOx) concentrations were determined in hepatic homogenates. Histopathological examination was performed using a histological scoring system.RESULTS: The histopathological changes including portal inflammation, necrosis, apoptosis, focal inflammation and fibrosis were severe in the BDL and BDL+vehicle groups. There were numerous large areas of coagulation necrosis. Histological Activity Index scores of these groups were significantly higher than that of the SO group. Treatment with melatonin reduced these alterations significantly. The degree of necro-infiammation and fibrosis showed significant difference between the BDL and BDL+melatonin groups. BDL was accompanied by a significant increase in MDA and NOx, and a significant decrease in GSH levels. Mean±SE values of MDA, GSH and NOx levels of SO group were 147.47±6.69, 0.88±0.33 μmol/g and 180.70±6.58 nm/g, respectively. The values of BDL group were 200.14±21.30, 0.65±0.02 μmol/g, and 400.46±48.89 nm/g, respectively, whereas the values of BDL+melatonin group were 115.93±6.8, 0.74±0.02 μmol/g,and 290.38±32.32 nm/g, respectively. Melatonin treatment was associated with a significant recovery of MDA, GSH and NOx levels.CONCLUSION: We have concluded that oxidative stress is associated with the pathogenesis of cholestatic liver damage and NO contributes to oxidative damage. Melatonin,even at low dose, is an efficient agent in reducing negative parameters of cholestasis. | Mukaddes Esrefoglu Mehmet Gül Memet Hanifi Emre Alaattin Polat Mukadder Ayse Selimoglu | 2005 | World Journal of Gastroenterology2005，11，13： | 6 |
| 8 | 扬子克拉通黄陵穹隆北部发现古元古代蛇绿混杂岩显示文摘黄陵穹窿位于华南扬子克拉通核部地区,出露有华南前南华纪最古老、面积最大的太古宙-古元古代崆岭杂岩(崆岭岩群)(高山和张本仁,1990;马大铨等,1997;Gao et al.,1999,2011;Qiu et al.,2000;Zhang et al.,2006;Zheng et al.,2006;Jiao et al.,2009;Guo et al.,2014),受后期新元古代黄陵花岗杂岩体侵入影响,大体以雾渡河大断裂为界分隔为南、北部两部分(也称为南、北崆岭群),是扬子克拉通前南华纪基底最具代表性的岩石记录,一直受国内外地质学界的高度关注, | 彭松柏 韩庆森 Ali Polat Timothy M.Kusky | 2016 | 地球科学(中国地质大学学报)2016，41，12： | 6 |
| 9 | Comparison of levofloxacin-containing sequential and standard triple therapies for the eradication of Helicobacter pylori显示文摘 | Zulfikar Polat Abdurrahman Kadayifci Murat Kantarcioglu Ayhan Ozcan Ozdes Emer Ahmet Uygun | 2011 | European Journal of Internal Medicine2011，，2： | 5 |
| 10 | Sea-Floor Metamorphism Recorded in Epidosites from the ca.1.0 Ga Miaowan Ophiolite,Huangling Anticline,China显示文摘The epidosites are interpreted to form in upflow zones at the base of ore-forming oceanic hydrothermal systems that vent as black smokers on the sea floor. This study presents new field, major and trace element, and oxygen isotope data for the recently discovered epidosites in the ca. 1.0 Ga Miaowan (庙湾) ophiolite located near the northern margin of the Yangtze craton. The epidosites occur mainly in the cores of strongly deformed, lensoidal amphibolites. Field observations, major and trace elements and oxygen isotopes suggest that the epidosites were formed by metasomatism of ocean floor basalts, diabase dykes, and gabbros during seafloor hydrothermal alteration. | 王军鹏 Timothy M Kusky Ali Polat 王璐 彭松柏 蒋幸福 邓浩 王淞杰 | 2012 | Journal of Earth Science2012，23，5： | 5 |
| 11 | SOME EULER SPACES OF DIFFERENCE SEQUENCES OF ORDER m显示文摘Kizmaz [13 ] 学习了差别顺序空格 ? ∞(Δ) , c (Δ) ,和 c0 (Δ) 。几篇文章处理了哪个被围住的 m-th 顺序差别的序列的集合,对零会聚,或会聚。Altay 和 Ba ? ar [5 ] 并且 Altay, Ba ? ar,和 Mursaleen [7 ] 介绍了 Euler 顺序空格 e (r) 0, e (r) c,和 e (r) ∞分别地。这篇文章的主要目的是介绍空格 e (r) 0 (Δ( m )), e (r) c (Δ( m )),并且 e (r)∞(Δ( m ))由其 m ( th )命令差别在 Euler 空格的所有序列组成 e (r) 0 , e (r) c ,和 e (r)∞分别地。而且,作者给一些拓扑的性质和包括关系,并且决定空格 e (r)的α-,β-,和γ- duals 0 (Δ( m )), e (r) c (Δ( m )),并且 e (r)∞(Δ( m )),并且空格 e (r)的 Schauder 基础 0 (Δ( m )), e (r) c (Δ( m ))。文章的最后节在顺序空间 e (r) c (Δ(m ) 上被奉献给一些矩阵地图砰的描述) 。给词调音:顺序 m 的差别顺序空格;Schauder 基础;α - ,β - ,和γ - duals; | Harun Polat Feyzi Basar | 2007 | Acta Mathematica Scientia2007，27，2： | 5 |
| 12 | Efficacy of ankaferd blood stopper application on nonvariceal upper gastrointestinal bleeding显示文摘AIM:To prospectively assess the hemostatic efficacy of the endoscopic topical use of ankaferd blood stopper(ABS) in active non-variceal upper gastrointestinal system(GIS) bleeding.METHODS:Endoscopy was performed on 220 patients under suspiciency of GIS bleeding.Patients with active non-variceal upper gastrointestinal bleeding(NVUGIB) with a spurting or oozing type were included.Firstly,8-10 cc of isotonic saline was sprayed to bleeding lesions.Then,8 cc of ABS was applied on lesions in which bleeding continued after isotonic saline application.The other endoscopic therapeutic methods were applied on the lesions in which the bleeding did not stop after ABS.RESULTS:Twenty-seven patients had an active NVUGIB with a spurting or oozing type and 193 patients were excluded from the study since they did not have non-variceal active bleeding.8 cc of ABS was sprayed on to the lesions of 26 patients whose bleeding continued after isotonic saline and in 19 of them,bleeding stopped after ABS.Other endoscopic treatment methods were applied to the remaining patients and the bleeding was stopped with these interventions in 6 of 7 patients.CONCLUSION:ABS is an effective method on NVUGIB,particularly on young patients with no coagulopathy.ABS may be considered as part of a combination treatment with other endoscopic methods. | Gokhan Gungor M Hakan Goktepe Murat Biyik Ilker Polat Tuncer Tuna Huseyin Ataseven Ali Demir | 2012 | World Journal of Gastrointestinal Endoscopy2012，4，12： | 5 |
| 13 | Tracheobronchopathia osteochondroplastica: four cases显示文摘 | Dursun Tatar Gunes Senol Atike Demir Gulru Polat | 2012 | Chinese Medical Journal2012，，16： | 4 |
| 14 | Debris flow susceptibility and propagation assessment in West Koyulhisar, Turkey显示文摘Turkey is highly prone to landslides because of the geological and geographic location.The study area,which is located in a tectonically active region,has been significantly affected by mass movements.Flow type landslides are frequently observed due to this location.This study aims at determining the source area and propagation of debris flows in the study area.We used the heuristic method to extract source areas of debris flow,and then used receiver operating characteristic(ROC)curve analysis to assess the performance of the method,and finally calculated the Area under curve(AUC)values being 83.64%and 80.39%for the success rate and prediction rate,respectively.We calculated potential propagation area and runout distance with Flow-R software.In conclusion,the obtained results(susceptibility map,propagation and runout distance)are very important for decisionmakers at the region located on an active fault zone,which is highly prone to natural disasters.The outputs of this study could be used in site selection studies,designing erosion prevention systems and protecting existing human-made structures. | Ali POLAT Dursun ERİK | 2020 | Journal of Mountain Science2020，17，11： | 4 |
| 15 | Strain Hardening and Strain Rate Sensitivity Behaviors of Advanced High Strength Steels显示文摘The mechanical properties of commercial dual phase (DP), transformation induced plasticity (TRIP), and high strength low alloy (HSLA-340) steel sheets are investigated and compared at various strain rates ranging from 0.001 7to 0.17 s-1 at ambient temperature.TRIP steel outperforms the other two materials , having comparable ductility and twice as large strength relative to DP steel.TRIP has larger strength and much larger ductility than HSLA-340.The exceuent ductility of TRIP800is due to its high strain hardening capability , which promotes stable plastic deformation.It is observed that the strain hardening rate in TRIP800does not decrease to zero at failure , as common in most materials in which failure is preceded by necking. | F Ozturk A Polat S Toros R C Picu | 2013 | Journal of Iron and Steel Research(International)2013，20，6： | 4 |
| 16 | Effects of tyrosine kinase inhibitor E7080 and eNOS inhibitor L-NIO on colorectal cancer alone and in combination显示文摘Objective:To investigate the effects of E7080 and N5-(1-iminoethyl)-L-ornithine dihydrochloride(L-NIO)on colorectal cancer alone and in combination.Methods:HT29 colorectal cancer cell line from Sap Institute was used.Real-time cell analysis(xCELLigence system)was performed to determine the effects of E7080 and L-NIO on colorectal cell proliferation.While apoptosis was determined with Annexin V staining,and the effect of agents on angiogenesis was determined with chorioallantoic membrane(CAM)model.Results:We found that E7080 has a strong antiproliferative effect with an half maximum inhibition of concentration(IC50)value of 5.60×10–8mol/L.Also it has been observed that E7080 showed antiangiogenic and apoptotic effects on HT29 colorectal cancer cells.Antiangiogenic scores of E7080 were 1.2,1.0 and 0.6for 100,10 and 1 nmol/L E7080 concentrations,respectively.Furthermore,apoptosis has been detected in71%of HT29 colorectal cancer cells after administration of 100 nmol/L E7080 which may indicate strong apoptotic effect.Meanwhile administration of L-NIO alone did not show any effect,but the combination of E7080 with L-NIO increased the antiproliferative,antiangiogenic and apoptotic effects of E7080.Conclusions:Results of this study indicate that E7080 may be a good choice in treatment of colorectal tumors.Furthermore the increased effects of E7080 when combined with L-NIO raise the possibility to use a lower dose of E7080 and therefore avoid/minimize the side effects observed with E7080. | Ahmet Altun Tijen Kaya Temiz Ezgi Balc Zübeyde Ak n Polat Mustafa Turan | 2013 | Chinese Journal of Cancer Research2013，25，5： | 4 |
| 17 | Intussusception in adults: an unusual and challenging condition for surgeons显示文摘 | Nazif Erkan Mehmet Hac?yanl? Mehmet Y?ld?r?m Hasan Sayhan Enver Vardar Alper F?rat Polat | 2005 | International Journal of Colorectal Disease2005，，5： | 3 |
| 18 | Global existence and decay of solutions for the generalized bad Boussinesq equation显示文摘In this paper,we consider the global existence of solutions for the Cauchy problem of the generalized sixth order bad Boussinesq equation.Moreover,we show that the supremum norm of the solution decays algebraically to zero as(1+t)(1/7)when t approaches to infnity,provided the initial data are sufciently small and regular. | Hatice Taskesen Necat Polat Abdulkadir Ertas | 2013 | Applied Mathematics(A Journal of Chinese Universities)2013，28，3： | 3 |
| 19 | Paleozoic convergence processes in the southwestern Central Asian Orogenic Belt:Insights from U–Pb dating of detrital zircons from West Junggar,northwestern China显示文摘The West Junggar orogen,located in the southwestern Central Asian Orogenic Belt(CAOB),preserves an abundant record of tectonic processes associated with the evolution of the Junggar Ocean.In this study,we use detrital zircon U–Pb age data from Ordovician to Carboniferous sandstones in the southern and central West Junggar domains,complemented by literature data,to better constrain the tectonic evolution of the southwestern CAOB.The Kekeshayi,Qiargaye,and Laba formations in the southern West Junggar domain were deposited during the Darriwilian-Sandbian,Katian-Aeronian,and Homerian-Emsian,respectively.Detrital zircon provenances of these formations display a marked shift from the southern West Junggar domain to the Paleo-Kazakhstan Continent(PKC).This suggests that the southern West Junggar intra-oceanic arc might have gradually accreted to the northern margin of the PKC prior to the Emsian,which has significantly contributed to the lateral growth of the PKC.The Carboniferous strata,Xibeikulasi,Baogutu,and Tailegula formations,in the central West Junggar domain represent a coherent sequence of volcaniclastic turbidites and were deposited in a progressively shrinking remnant oceanic basin during the Visean to Moscovian.They contain unimodal detrital zircon distributions and are derived from the local and coeval magmatic rocks in the central West Junggar domain.We propose that the final closure of the Junggar Ocean likely occurred in the end of the Late Carboniferous in response to regional amalgamation events in the southwestern CAOB,which marks the final assembly of the Kazakhstan Orocline.The central and southern West Junggar domains underwent individual evolution in the Paleozoic,and were recombined by the significant intra-continental reworking along the large-scale strike-slip faults. | Pan Zhang Guocan Wang Tianyi Shen Ali Polat Chengyu Zhu | 2021 | Geoscience Frontiers2021，12，2： | 3 |
| 20 | Precontoured buttress plate vs reconstruction plate for acetabulum posterior wall fractures: A biomechanical study显示文摘BACKGROUND The purpose of open reduction and internal fixation of acetabulum posterior wall fractures is to restore anatomical structure and stability of the hip joint, in order to start weight bearing as soon as possible and prevent hip arthrosis; restoration of the anatomy should preserve function of the joint as well. Although 'special shaped precontoured plates' have been developed in recent years for surgical treatment of this region, studies comparing the traditional plates with the newly designed precontoured plates are lacking.AIM To evaluate the biomechanical properties of precontoured anatomic buttress and conventional curved reconstruction plates(CCRPs) for posterior wall acetabulum fracture treatment.METHODS Twelve pelvis models were created for testing plate treatment of fracture in the posterior wall of the acetabulum. These 12 pelvis models were used to create 24 hemipelvis models(experimental) by cutting from the sagittal plane and passing over the center of gravity, after which the posterior wall acetabular fractures(of similar type and size) were created. In these experimental models, the right acetabulum was fixed with a 5-hole CCRP, while the left was fixed with a precontoured anatomic buttress plate(PABP). Samples were placed through thetest device and were subjected to static load testing, with a constant testing velocity of 2 mm/min until the load reached 2.3 kN or the acetabular fixation failed. Dynamic tests were also performed with sinusoidal wave load, with a maximal load of 2.3 kN and a load ratio of 0.1.RESULTS The average stiffness values were 460.83 ± 95.47 N/mm for the PABP and 291.99± 118.58 N/mm for the 5-hole CCRP. The precontoured anatomic acetabulum buttress plates had significantly higher rigidity than the CCRPs(P = 0.022). There was a statistically significant difference between the unloaded and 2.3 kN-loaded values of AL(posterosuperior fracture line vertical to the ground surface) and CL(posteroinferior fracture line vertical to the ground surface) parameters for both the PABPs and the 5-hole CCRPs(P = 0.036 and P = 0.045, respectively).According to the static tests, the amount of total displacement was significantly less in the PABPs than in the CCRPs. Comparative analysis of the displacement in the BL(posterior wall fracture line horizontal to the ground) parameter yielded no statistically significant differences between the PABP and the 5-hole CCRPs(P= 0.261).CONCLUSION PABP provides more stable fixation in acetabulum posterior wall fractures than5-hole CCRP, allowing for proximal or distal fracture line screw application without reshaping. | Güray Altun Gürsel Saka Teyfik Demir Fatma Kübra Erbay Elibol Mehmet Or?un Polat | 2019 | World Journal of Orthopedics2019，10，5： | 3 |
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