Kraghamrick2589

Objective This study aimed to compare the efficacy and safety of the new method including 3D printing-based preoperative planning, surgical workshop, and contouring of the plate versus conventional method in the surgical treatment of complex acetabular fractures. Methods We retrospectively analyzed the data in a cohort of 88 patients of complex acetabular fracture with mean 29.95 ± 4.84 months (24-41 months) follow-up. Patients were divided into two groups. Group 1 consisting of 41 patients were performed previewed surgery with a 3D printing-based pre-contoured plate on a 3D printing model. Group 2, comprised of 47 patients, were treated by the traditional contoured plate technique. The quality of reduction was assessed using criteria described by Matta. Functional outcome was evaluated using Modified Postel Merle D'Aubigne score. A custom-made quiz was used to evaluate the chief assistant. Results The study showed no significant differences in measured preoperative variables except for the age between the Group 1 and Group 2 (p > 0.05). Compared with the Group 2, the intraoperative blood loss, operative time was significantly decreased in Group 1 (p 0.05). The result of evaluation of assistant in Group 1 was significantly high than in Group 2 (p less then 0.05). Conclusion 3D printing-based pre-contoured plate is a more effective and reliable method than traditional contoured plate technique for treating the complex acetabular fractures. Meanwhile, the 3D printing is a useful orthopedic surgical education tool which can improve the understanding of the complex acetabular fracture for a young surgeon.Objective The aim of this randomized controlled trial was to evaluate the interproximal cleaning efficacy of waist-shaped compared with straight soft interdental brushes in patients undergoing nonsurgical periodontal therapy. Materials and methods Ten patients diagnosed with periodontitis stage II or III were scheduled for nonsurgical periodontal therapy. Baseline plaque control record (PCR), modified approximal plaque index (API), papillary bleeding index (PBI), probing pocket depth (PPD), and bleeding on probing (BOP) were evaluated. Four interdental spaces of equal sizes were determined, and baseline plaque indices (PI) were assessed on eight surfaces of the respective adjacent teeth, resulting in 640 measuring positions. Interdental brushes with a straight or waist-shaped design were randomly allocated to the right or left side, and patients received oral hygiene instructions. Follow-up measurements including PCR, API, PBI, and site-specific PI were performed during initial nonsurgical periodontal therapydless of brush design. Clinical trial registration ISRCTNregistry (#ISRCTN24498365), http//www.isrctn.com/ISRCTN24498365.Objectives Investigating the effect of carbonation on the strength and structure of calcium silicate-based cement (Biodentine™) in the presence of bicarbonate ion. Materials and methods Cylindrical samples of Biodentine (N = 120) were prepared and cured in deionised water (DW) or bicarbonate solution (BC) for 1 and 2 days and 1, 2 and 4 weeks. After storage, the compressive strength of cured samples was tested using a universal testing machine, and carbonate was quantified on the surface or within the structure of samples using Raman and Fourier transform infrared spectroscopy, respectively. Levels of calcium and silicon ions and pH were measured after each storage duration, and 4-week-old samples were imaged using scanning electron microscopy. Results Cement's compressive strength was significantly higher after curing in BC for 2 days. This was associated with significantly higher levels of carbonate on the surface of the cement but not within its structure. Levels of calcium and silicon ions and pH in BC dropped significantly after 1 day and remained at a steady lower level. The pH and calcium ion levels dropped gradually over 4 weeks in DW, unlike the silicon ion level that maintained a steady higher level than in BC. Conclusions Our results indicate that Biodentine exhibited higher strength in the presence of bicarbonate, which can be explained by the carbonation process that encouraged the formation of calcium carbonate on the cement's surface. Clinical relevance Carbonation should be of more consideration when studying calcium silicate-based cements, with curing and testing conditions closer to the intraoral conditions.The current study aimed to assess the quality of apportion pollution sources and examine the impacts of anthropogenic activities on groundwater. The study was implemented in two sequential steps of (1) bulk examination of groundwater quality followed by principal component analysis/factor analysis (PCA/FA) to apportion pollution sources and (2) pollution source-based examination to assess the effects of anthropogenic activities. Well-water samples were taken in Ho Chi Minh City, Vietnam, in 2015 (233 samples) and 2019 (20 samples) and analyzed for 8 and 15 water quality parameters, respectively. The results showed that 99% of studied wells had pH value lower than the permissible limit, and 29, 20, 15, and 14% of studied wells had concentrations of Fe, NH4+, COD (chemical oxygen demand), and coliform, respectively, higher than the maximum permissible limit. PCA/FA revealed that three pollution sources, ranked in the order of importance agricultural, urban, and industrial activities, could mainly contribute to enriching the pollutant concentrations of groundwater. CP-456773 While agricultural activities may contaminate groundwater with organic substances, the urban area may enrich bacterial-pathogen density such as E. coli and coliform, and the industrial area may contribute to contaminating groundwater with some inorganic parameters. Groundwater quality index and ANOVA showed that groundwater of the studied area was poor to very poor in quality and that in the agricultural area was the worst of the three land-use types. In brief, the groundwater quality in the studied area was degraded and agricultural activities were the most important factor causing the degradation followed by urban and industrial activities.