ABSTRACT
Background: Diabetes mellitus (DM) involves a series of metabolic conditions associated with hyperglycaemia which is caused by defects in insulin secretion and./or insulin action. The aim of this work was assessment of the relationship between Aortic Root (AOR) diameter and type 2 diabetes mellitus (T2DM) in Hypertension (HTN) cases. Methods: This prospective case control study was carried out on 80 HTN cases. Cases were divided in to three groups: Group A (30 HTN cases) with type 2 DM with good metabolic control (Hb AIC ? 7.0), group B: (30 HTN cases) with type 2 DM with poor metabolic control (Hb AIC > 7.0) and C (Control group) 20 HTN, non-DM subjects of the same age and sex group with no other comorbid conditions. Results: FS had a significant decline in group A (P2 = 0.001) and in group B (P3 <0.001) than C. EF had a significant difference among all groups (P <0.001). Early wave declaration time (DT) had a significant decline in group A (P2 = 0.049) and in group B (P3= 0.023) than C. Tissue doppler early velocity wave had a significant difference among all groups (P = 0.004). Tissue doppler early velocity wave had a significant decline in group A and B than C. (P2 = 0.038. P3 = 0.003). Conclusions: AOR in HTN cases had a significant decline in DM cases compared with non-DM cases. In our results, glycaemic control didn’t play a significant role in aortic root.
ABSTRACT
This study aims to explore the effect of aortic sinus diameter on aortic valve opening and closing performance in the case of no obvious disease of aortic valve and annulus and continuous dilation of aortic root. A total of 25 three-dimensional aortic root models with different aortic sinus and root diameters were constructed according to the size of clinical surgical guidance. The valve sinus diameter S is set to 32, 36, 40, 44 and 48 mm, respectively, and the aortic root diameter is set to 26, 27, 28, 29 and 30 mm, respectively. Through the structural mechanics calculation with the finite element software, the maximum stress, valve orifice area, contact force and other parameters of the model are analyzed to evaluate the valve opening and closing performance under the dilated state. The study found that aortic valve stenosis occurs when the = 32 mm, = 26, 27 mm and = 36 mm, = 26 mm. Aortic regurgitation occurs when the = 32, 36 and 40 mm, = 30 mm and = 44, 48 mm, = 29, 30 mm. The other 15 models had normal valve movement. The results showed that the size of the aortic sinus affected the opening and closing performance of the aortic valve. The smaller sinus diameter adapted with the larger root diameter and the larger sinus diameter adapted with the smaller root diameter. When the sinus diameter is 40 mm, the mechanical performance of the valve are good and it can well adapt with the relatively large range of aortic root dilation.
Subject(s)
Humans , Aorta , Aortic Valve , Physiology , Aortic Valve Insufficiency , Aortic Valve StenosisABSTRACT
PURPOSE: The purpose of this study was to provide an actual guideline in determining the shape, diameter, and position of the implant in immediate implantation by the measurement of the thickness of facial and palatal plate, the thickness of cortical bone on the facial and palatal plate, the diameter of the root, and the distance between the roots in the cadavers. MATERIALS AND METHODS: The horizontal sections of 20 maxillae were measured and analyzed to obtain the average values. Resin blocks were produced and cut serially at 1 mm intervals from the cervical line to the root apex. Images of each section were obtained and the following measurements were performed: The thickness of the facial and palatal residual bone at each root surface, the thickness of the facial and palatal cortical bone at the interdental region, the diameter of all roots of each section on the faciopalatal and mesiodistal diameter, and the interroot distance. Three specimens with measurements close to the average values were chosen and 3-dimensional images were reconstructed. RESULTS: The thickness of the facial and palatal cortical bone at the interdental region in the maxilla, the buccal cortical bone was thicker in the posterior region compared to the anterior region. The interroot distance of the alveolar bone thickness between the roots increased from anterior to posterior region and from coronal to apical in the maxilla. CONCLUSION: In this study, the limited results of the morphometric analysis of the alveolar ridge using the sections of maxilla in the cadavers may offer the useful information when planning and selecting optimal implant for immediate implantation in the maxilla.
Subject(s)
Alveolar Process , Cadaver , MaxillaABSTRACT
Objective To investigate the relationship between the root diameter of Angelica sinensis and its early bolting rate, and to decrease the bolting rate. Methods The seedling transplanting of A. sinensis with various root diameters was used to study the bolting rate and yield. Results Bolting plants can be observed in the field at June and the period from June to July is the bolting heyday. The bolting rate was the highest, up to 94.65%, in the treatment of root diameter ≥ 0.86 cm. However, it was only 1.63% in the treatment of root diameter ≤ 0.35 cm on Oct. 2nd. In the treatment of root diameter ≤ 0.35 cm, the seedling rate was only 33.62%, while in the treatment of root diameter ≥ 0.86 cm, the seedling rate was the highest, up to 95.75%, but the harvest seedling number was only 6 395 plant/hm2. In the treatment of root diameter of 0.46—0.55 cm, the harvest seedling number was 68 398 plant/hm2, which was significantly higher than other treatments. The highest yield appeared in the treatment of root diameter in 0.46—0.55 cm of transplanting seedling, the fresh and dry yields of A. sinensis were 5 717.58 kg/hm2 and 1 554.98 kg/hm2, respectively. Conclusion The seedlings with root diameter in the range of 0.46—0.65 cm should be selected to transplant in practice.