scholarly journals Effect of Recycling Protocol on Mechanical Strength of Used Mini-Implants

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Sérgio Estelita ◽  
Guilherme Janson ◽  
Kelly Chiqueto ◽  
Eduardo Silveira Ferreira

Purpose. This study evaluated the influence of recycling process on the torsional strength of mini-implants.Materials and Methods. Two hundred mini-implants were divided into 4 groups with 50 screws equally distributed in five diameters (1.3 to 1.7 mm): control group (CG): unused mini-implants, G1: mini-implants inserted in pig iliac bone and removed, G2: same protocol of group 1 followed by sonication for cleaning and autoclave sterilization, and G3: same insertion protocol of group 1 followed by sonication for cleaning before and after sandblasting (Al2O3-90 µ) and autoclave sterilization. G2 and G3 mini-implants were weighed after recycling process to evaluate weight loss (W). All the screws were broken to determine the fracture torque (FT). The influence of recycling process on FT and W was evaluated by ANOVA, Mann-Whitney, and multiple linear regression analysis.Results. FT was not influenced by recycling protocols even when sandblasting was added. Sandblasting caused weight loss due to abrasive mechanical stripping of screw surface. Screw diameter was the only variable that affected FT.Conclusions. Torsional strengths of screws that underwent the recycling protocols were not changed. Thus, screw diameter choice can be a more critical step to avoid screw fracture than recycling decision.

2017 ◽  
Vol 44 (4) ◽  
pp. 1537-1544 ◽  
Author(s):  
Yu-qing Huang ◽  
Jie Li ◽  
Ji-yan Chen ◽  
Ying-ling Zhou ◽  
An-ping Cai ◽  
...  

Background/Aims: Although it is widely acknowledged that atherosclerosis is mainly a chronic inflammatory process, in which both miR-29b and interleukin-6 (IL-6) play multifaceted roles, the association between miR-29b and IL-6 remains unknown. The aim of the present study was to explore the relationship between miR-29b and IL-6 and to test whether circulating levels of miR-29b and IL-6 could predict atherosclerosis. Methods: A total of 170 participants were divided into two groups according to carotid intima-media thickness (CIMT): study group (CIMT ≥ 0.9mm) and control group (CIMT < 0.9mm). Levels of circulating miR-29b and IL-6 were measured by quantitative real-time polymerase chain reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA), respectively. The association of miR-29b and IL-6 levels with CIMT was assessed using Spearman correlation analysis and multiple linear regression analysis. Results: The study group showed higher miR-29b levels (31.61 ± 3.05 vs. 27.91 ± 1.71 Ct, p < 0.001) and IL-6 levels (3.40 ± 0.67 vs. 2.99 ± 0.37 pg/ml, p < 0.001), compared with the control group. CIMT was positively correlated with miR-29b (r = 0.587, p < 0.001) and IL-6 (r = 0.410, p < 0.001), and miR-29b levels were also correlated with IL-6 (r = 0.242, p = 0.001). Multiple linear regression analysis also showed that CIMT was positively correlated with miR-29b and IL-6. After adjustment for age, body mass index, systolic blood pressure, total cholesterol and C-reactive protein, CIMT was still closely correlated with miR-29b and IL-6. The combination of miR-29b and IL-6 (AUC = 0.901, p < 0.001) offered a better predictive index for atherosclerosis than either miR-29b (AUC = 0.867, p < 0.001) or IL-6 (AUC = 0.747, p < 0.001) alone. Conclusion: Circulating levels of miR-29b and IL-6 may be independently correlated with subclinical atherosclerosis, and may serve as novel biomarkers for the identification of atherosclerosis.


2006 ◽  
Vol 154 (3) ◽  
pp. 433-440 ◽  
Author(s):  
Sin Gon Kim ◽  
Ohk Hyun Ryu ◽  
Hee Young Kim ◽  
Kye Won Lee ◽  
Ji A Seo ◽  
...  

Objective: Thiazolidinediones have favorable influences on surrogate markers of atherosclerosis such as adiponectin, and arterial stiffness in diabetic patients. However, it is not well known whether these beneficial effects occur in subjects without diabetes, such as prediabetes or the non-diabetic metabolic syndrome (MetS). The present study was therefore designed to evaluate the effectiveness of the insulin-sensitizing agent rosiglitazone on circulating adipocytokine levels and brachial-ankle pulse wave velocity (baPWV) in non-diabetics. Design and methods: Ninety-nine subjects with prediabetes or non-diabetic MetS were randomly assigned to either rosiglitazone or an untreated control group (50 and 49 subjects respectively). The rosiglitazone group was treated daily for 12 weeks with 4 mg rosiglitazone. All subjects received a 75 g oral glucose test (OGTT) before and after treatment. In addition, baPWV, together with the levels of adiponectin, resistin, and high sensitivity C-reactive protein (hsCRP) were determined. Results: Rosiglitazone treatment significantly increased circulating adiponectin levels (P < 0.001) relative to the control group (P = 0.21). Plasma resistin levels were unchanged in both the rosiglitazone-treated and -untreated groups, but baPWV and hsCRP were significantly decreased (P < 0.001 and P = 0.003 respectively) in the rosiglitazone group only. Multiple linear regression analysis showed that changes in plasma adiponectin and baPWV were significantly affected by rosiglitazone treatment. Conclusions: These data suggest that rosiglitazone may have an anti-atherogenic effect in subjects with prediabetes or non-diabetic MetS.


2011 ◽  
Vol 106 (S1) ◽  
pp. S120-S123 ◽  
Author(s):  
Rebecca Ricci ◽  
Isabelle Jeusette ◽  
Jean-Marie Godeau ◽  
Barbara Contiero ◽  
Marianne Diez

The effects of the dietary inclusion of two levels of short-chain fructooligosaccharides (sc-FOS) on weight loss, biochemical parameters and serum haptoglobin concentration were investigated in twelve experimental obese Beagle dogs. Dogs were randomised into two groups and submitted to a weight loss program (WLP): the control group (C) received a commercial energy-restricted high-protein diet containing 1 % DM sc-FOS, whereas the test group (T) received the same diet enriched with sc-FOS to attain a 3 % DM content. Body weight (BW) and body condition score were weekly assessed in each dog and blood was collected before and after WLP to measure total plasma cholesterol (CHOL), TAG, NEFA, glucose (GLUC), insulin, serum leptin and haptoglobin. Groups showed similar BW and blood parameters before treatment. When values before and after treatment of the dogs were compared, significant reductions were observed for all parameters, with the exception of NEFA and GLUC. However, when these reductions were compared between C and T groups, significant differences were detected only for haptoglobin (T before v. T after: 1545 v. 605 mg/l, P = 0·03; C before v. C after: 1635 v. 1400 mg/l, P = NS). Positive correlations between haptoglobin and CHOL and between haptoglobin and TAG were observed before but not after WLP. In conclusion, feeding obese dogs with the energy-restricted diet caused significant weight loss and reduction of blood parameters, irrespective of the sc-FOS content included. However, serum haptoglobin level, and the subclinical inflammatory condition associated with it, was significantly lowered in the T but not in the C group.


2002 ◽  
Vol 87 (11) ◽  
pp. 5030-5037 ◽  
Author(s):  
Michael Zitzmann ◽  
Maik Brune ◽  
Eberhard Nieschlag

Abstract The effect of testosterone (T) substitution therapy on blood vessel functions in relation to cardiovascular disease has not been fully elucidated. In 36 newly diagnosed nonsmoking hypogonadal men (37.5 ± 12.7 yr) endothelium-dependent flow-mediated vasodilatation (FMD; decreased in atherosclerosis) of the brachial artery was assessed before treatment and after 3 months of T substitution therapy (250 mg testosterone enanthate im every 2 wk in 19 men, human chorionic gonadotropin sc twice per week in 17 men). Twenty nonsmoking controls matched for age, low-density lipoprotein cholesterol (LDL-C), body height, and baseline diameter of the artery were selected for repeated measurements from a larger eugonadal control group (n = 113). In hypogonadal men, basal FMD (17.9 ± 4.5%) was significantly higher than in the large (11.9 ± 6.4%) and matched control (11.8 ± 7.1%, both P &lt; 0.001) groups. Grouped multiple linear regression analysis revealed a significant negative association of T levels with FMD within the hypogonadal range, but no significant association was seen within the eugonadal range. During substitution therapy, T levels increased from 5.8 ± 2.3 to 17.2 ± 5.1 nmol/liter and FMD decreased significantly to 8.6 ± 3.1% (P &lt; 0.001, analysis for covariance for repeated measurements including matched controls). LDL-C and advanced age contributed significantly to decrease FMD (P = 0.01, P = 0.04, respectively). Because T substitution adversely affects this important predictor of atherosclerosis, other contributing factors (such as smoking, high blood glucose, and LDL-C) should be eliminated or strictly controlled during treatment of hypogonadal men.


Author(s):  
Alexander S. Romanov ◽  
V. G Morozov ◽  
P. N Geletin

Aim of the present study was to evaluate the effectiveness of prosthodontic methods of treatment based of functional diagnostic of patients with increased dental attrition Methods. We have examined 35 patients at the Smolensk State Medical University Hospital: 20 patients with increased dental attrition and 15 patients who didn’t have any sign of functional disorders of dentoalveolar and musculoskeletal system. The main group was divided into two subgroups. In the group 1 (11 patients) required a prosthodontic therapy included individual wax-up of future prosthetic construction based on data of functional diagnostic. An electromyographic study was conducted before and one month after treatment for determination of the effectiveness of treatment methods. Results. Analyzing and comparing the data of the electromyographic study 1 month before and after treatment of patients of the 1 group have shown 93,1 % effectiveness of the treatment and the control group. The results of the study show that such occlusion is optimal for the muscles and temporomandibular joint. Conclusion. Dental treatment of increased attrition of teeth based on functional diagnostic contributes to the normalization of muscles activity. Moreover it allows to protect teeth from attrition and providing effective rehabilitation of patients.


2021 ◽  
Vol 2 (1) ◽  
pp. 10-15
Author(s):  
I Putu Astrawan ◽  
I Putu Prisa Jaya

Background: Footwork training is important in coaching basic movements in badminton. This research aims to learn about the influence of footwork training on improving leg muscles strength. Methods: The study used a randomized pretest-posttest control group design. The participants consisted of 42 male badminton players of Universitas Pendidikan Ganesha, Bali, Indonesia, who split into two groups of footwork training (ten repetitions two sets (group 1) and five repetitions with four sets (group 2)). The coach gave the footwork exercise three times per week for 6 weeks to each group and measured the leg muscle strength using the dynamometer test. Results: The result of the within-group paired T-test before and after the training shows group 1 and group 2 (p<0.05). For group 1, the mean of leg muscle strength was 114.19±33.13 kg before the training and 183.19±33.56 kg after the training, with an increase of 60% (69 kg). On the other hand, for group 2, the mean score of leg muscle strength before the training was 113.05±31.30 kg and after the training was 141.10±34.91, with an increase of 25% (28 kg). The leg muscle strength difference between the groups before and after the training was tested using the independent T-test with a significant α=0.05. Comparing the differences of leg muscle strength for both the groups before the training was p= 0.90, and after the training was p=0.00. Conclusion: The conclusion is training badminton footwork ten repetition two sets better than five repetitions four sets to improve leg muscle strength.


Al-Muzara ah ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 109-127
Author(s):  
Hana Khairunnisa ◽  
Deni Lubis ◽  
Qoriatul Hasanah

Halal certification is one of the company’s strategy that aims to retain their consumers and become a difference with competitors and to give added value for product. Most of the researchers have proved that halal certificates affect big companies’ total revenue. However, there are not many studies that have proved that halal certificate would affect the total revenue of micro, small, and medium enterprises (MSMEs), especially in Bogor City. This research aims to determine the characteristics of MSMEs’ owners and their business, analyze the changes of MSME’s total revenue before and after owning a halal certificate, and the factors that affect MSMEs’ total revenue after owning a halal certificate. The questionnaire data were collected through an interview with 40 food and beverage MSMEs’ owners who have halal certificates in Bogor City. This research uses descriptive analysis, paired sample t-test, and multiple linear regression analysis as the analysis methods. Results based on this research showed that there was a difference in the total revenue of MSMEs before and after owning a halal certificate. The factors that have positive and significant effects of MSMEs’ total revenue influences are capital, work hours, length of business, and a dummy of promotion.


2020 ◽  
Vol 25 (5) ◽  
pp. 24-29
Author(s):  
Adilson Luiz Ramos ◽  
Rodrigo Lorenzi Poluha ◽  
Pablo Guilherme ◽  
Gabriel Araújo Khoury ◽  
Joao Marcos Pedro Rosa Junior

ABSTRACT Objective: The present study aimed at comparing the external lateral root resorption (ELRR) and external apical root resorption (EARR) between teeth moved through the atrophic edentulous ridge and those undergoing the usual orthodontic movement. Methods: Fifty-four premolars were evaluated, where 27 of them had been moved toward the edentulous ridge (Group 1) and 27 from the same patient, had not been translated, which comprised the control group (Group 2). ELRR was evaluated by 0-3 scores and EARR was evaluated by 0-4 scores, before and after movement. Measurements were compared by Kruskal-Wallis and Student-Newman-Keuls tests. Results: ELRR increased statistically only in the Group 1 (p< 0.05). After orthodontic treatment, it was observed that almost 56% (n = 15) of teeth in Group 1 presented scores 2 and 3, while Group 2 presented scores 2 and 3 in about 11% (n= 3) of the teeth. EARR increased in both groups after orthodontic movement, however, statistically analyses showed no significant differences between groups (p> 0.05). Conclusions: Orthodontic movement into the atrophic edentulous ridge is subject to a greater lateral external root resorption.


2017 ◽  
Author(s):  
Kiana Fatholahnezhad ◽  
Amir Letafatkar ◽  
Malihe Hadadnezhad

BACKGROUND forward head and round shoulder posture is believed to alter scapular kinematics and muscle activity placing increased stress on the shoulder, leading to shoulder pain and dysfunction. OBJECTIVE The purpose of this study was to evaluate the effect of a six-week combined treatment consisting of manual therapy and stabilizing exercises, with a one-month follow-up, on neck pain with forward head and rounded shoulder postures. METHODS A total of 60 women aged 32-42 years of age with neck pain, and forward head and rounded shoulder postures were randomized into three groups: group 1 performed stabilizing exercises and received manual therapy (n=20), group 2 performed stabilizing exercises (n=20), and group 3 (control group) performed home exercises (n=20) over six weeks.The follow-up time was one month after the post test. The craniocervical and rounded shoulder angles, pain, and function were measured before and after six-week interventions, and a one-month follow- up. RESULTS The results showed significant positive changes within the experimental groupsin all variables, but there were minor changes in the control group in all variables before and after the intervention. Also, there were significant function and pain improvement in the experimental group 1 comparing to group 2. There were no differences between post intervention and one-month follow-up on posture and function in the experimental groups. CONCLUSIONS These findings suggest that both interventions were significantly effective for reducing neck pain, and improving function and posture in patients with chronic neck pain, and forward head and rounded shoulder postures. However, the improvement in function and pain was more effective in group 1 than those of group 2 suggesting that manual therapy can be used as a supplement method to the stabilizing intervention in the treatment of neck pain. More research is needed to confirm the result of this study.


2020 ◽  
Vol 40 (4) ◽  
pp. 300-305
Author(s):  
Juliana T. Jeremias ◽  
Thiago H.A. Vendramini ◽  
Roberta B.A. Rodrigues ◽  
Mariana P. Perini ◽  
Vivian Pedrinelli ◽  
...  

ABSTRACT: Chronic low-grade inflammation in obesity is characterized by an increased production of pro-inflammatory cytokines that contribute to insulin resistance. For this study body composition, markers of inflammation and of insulin resistance in dogs before and after weight loss were compared to those of lean dogs. Eleven client-owned obese adult dogs underwent a weight loss program with commercial dry food for weight loss and reached an ideal body condition score (BCS) six months after the beginning of the weight loss program. A Control Group of nine dogs with ideal BCS were selected for the comparison. Shapiro-Wilk test was used to test for normality, Mann Whitney were used for non-normally distributes data, and Student t-test was used for normally distributed parameters. In the Obese Group body fat decreased from 41.6% (30.7-58.6) to 29.1% (18.6-46.3) (P<0.01) and dogs maintained lean body mass throughout the weight loss program (P>0.05). Obese dogs presented higher concentration of fructosamine, triglycerides, insulin, IGF-1 and leptin than the Control Group before weight reduction (P<0.05). Serum concentrations of triglycerides, IL-2, IL-6, TNF-α, insulin, leptin and IGF-1 decreased after weight loss (P<0.01), and these concentrations were similar to the Control Group (P>0.05), except for leptin (P<0.001). No alteration on peptide YY was found. Leptin (r=0.60, P=0.01), fructosamine (r=0.44, P=0.02) and triglycerides (r=0.40, P=0.04) concentrations correlated with the reduction of body fat. Weight loss reduced the concentrations of inflammatory and insulin resistance markers and most parameters became similar to dogs that have always been lean, reinforcing the importance of weight loss in small animal practice.


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