scholarly journals Surface Roughness and Translucency of Various Translucent Zirconia Ceramics after Hydrothermal Aging

2021 ◽  
Author(s):  
Chaimongkon Peampring ◽  
Santiphab Kengtanyakich
Keyword(s):  
Surface Roughness ◽  
Repeated Measures ◽  
Contrast Ratio ◽  
X Ray Diffraction ◽  
Hydrothermal Aging ◽  
Significant Difference ◽  
Before And After ◽  
Bonferroni Test ◽  
Group 2 ◽  
Group 1

Abstract Objective This study investigated the effect of hydrothermal aging on surface roughness and translucency of various translucent zirconia materials. Materials and Methods Four types of zirconia were tested. Group 1 was translucent zirconia with no cubic structure. Group 2, 3, and 4 included cubic-containing zirconia with different amounts of cubic structures (less than 30%, 30–50%, and more than 50%, respectively). Each group contained 15 disk-shape specimens with dimensions of 15 mm in diameter and 1 mm in thickness. As-sintered surface roughness, translucency parameter, and contrast ratio were evaluated in the two different sessions, before and after aging. Statistical Analysis Two-way repeated measures ANOVA with Bonferroni test was used to analyze statistically significant difference in those tested parameters. Phase structure before and after aging was analyzed by X-ray diffraction analysis (XRD). Results Groups 1 and 2 showed significant increased surface roughness after aging while groups 3 and 4 showed no alteration of surface. There was no effect of aging on translucency in all groups. After aging, group 1 and 2 presented monoclinic structure (16.63 and 5.01%, respectively). Conclusion Hydrothermal aging caused phase transformation and increasing surface roughness in group 1 and 2 but did not affect translucency in all groups.

Attitude of the Canine in Secondary Bone-Grafted and Nongrafted Patients with Cleft Lip and Palate

2005 ◽  
Vol 42 (6) ◽  
pp. 679-686 ◽  
Author(s):  
Enkhtuvshin Gereltzul ◽  
Yoshiyuki Baba ◽  
Kimie Ohyama
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Panoramic Radiography ◽  
Control Groups ◽  
Significant Difference ◽  
Before And After ◽  
Group 2 ◽  
Two Stages ◽  
And Control ◽  
Group 1

Objective To investigate the eruption pattern of the cleft-side canine regarding its pre-eruption position relative to the cleft in bone-grafted (BG) and nongrafted (NonBG) patients with cleft lip and palate. Methods Fifty-three patients with cleft lip and palate (21 BG, 32 NonBG) were examined by panoramic radiography and posteroanterior cephalography taken before and after canine eruption. Subjects were categorized into BG, NonBG, and control groups. Canines at the pre-eruption stage were categorized as close to (group 1) or distant from (group 2) the cleft area. The canine angle and its change between the two stages were evaluated. Results No significant differences were noted between the initial canine angle of the BG and NonBG groups. Although canines in the BG group erupted without a significant change in angle, the canine angle increased significantly (p < .0001) in the NonBG and control groups. In group 1, a greater change in canine angle was noted in the NonBG (p < .05) and control (p < .01) groups than in the BG group. In group 2, no significant difference was noted among the three groups. Conclusions In BG patients, a canine located near the cleft appears to erupt at the same angle as it had before grafting. However, in NonBG patients, it erupts more vertically, guided by cortical bone. For canines distant from the cleft area, there is no significant difference in the change in angulation between NonBG and BG patients.

scholarly journals Orthosiphon versus Placebo in Nephrolithiasis with Multiple Chronic Complaints: A Randomized Control Trial

2009 ◽  
Vol 6 (4) ◽  
pp. 495-501 ◽  
Author(s):  
Amorn Premgamone ◽  
Pote Sriboonlue ◽  
Srinoi Maskasem ◽  
Wattana Ditsataporncharoen ◽  
Bungornsri Jindawong
Keyword(s):  
Myofascial Pain ◽  
White Blood Cells ◽  
Analog Scale ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
Randomized Control ◽  
Group 2 ◽  
Primary Measure ◽  
Group 1

Nephrolithiasis in the communities of Northeast Thailand frequently presents with multiple chronic health complaints, i.e. myofascial pain, back pain, dyspepsia, arthralgia, headache, fatigue, frank paresthesia, dysuria and any of these aggravated by purine-rich food (PRF). We assessed the efficacy of Orthosiphon in treating subjects with at least two active symptoms and negative for urine white blood cells. Subjects were randomly allocated to two groups. Crude extract of Orthosiphon given in a capsule (equivalent to 1.6–1.8 g of dried leaves of Orthosiphon) two times a day to Group 1 (n= 36) and a placebo to Group 2 (n= 40) for 14 days. The medication for each subject was packed and its code kept secret until the data analysis. Both groups were asked not to consume any of 25 purine-rich foods (PRFs) during treatment. The primary measure was the reduced sum of active severity symptoms as recorded using the visual analog scale before and after therapy (i.e. on day 7 and 14). The data on 76 subjects were processed. The mean of the total scores (95% CI) of the symptoms in each group were decreased significantly (P< 0.001); 185.6 (153.3, 218.0) to 94.7 (58.2, 131.2) in the Orthosiphon group and 196.1 (164.4, 227.8) to 89.6 (62.8, 116.5) in the placebo group. When comparing between groups, no statistically significant difference was found. The mean consumption in PRFs was significantly decreased (P< 0.001) in both groups; however, Orthosiphon did not have additional benefit over placebo at 7 and 14 days of treatment during which they reduced these foods.

scholarly journals PELATIHAN LONCAT NAIK TURUN TRIBUN DAN PELATIHAN LONCAT NAIK TURUN BANGKU MENINGKATKAN DAYA LEDAK OTOT TUNGKAI PADA PESERTA EKSTRA KURIKULER BOLA VOLI PUTRA SMA NEGERI 1 TEGALLALANG

2019 ◽  
Author(s):  
I Putu Agus Budi Sudarsana ◽  
J. Alex Pangkahila ◽  
Bagus Komang Satriyasa ◽  
Wayan Weta ◽  
I Nengah Sandi ◽  
...  
Keyword(s):  
High School ◽  
T Test ◽  
P Value ◽  
Public High School ◽  
Jump Training ◽  
Explosive Power ◽  
Significant Difference ◽  
Before And After ◽  
Group 2 ◽  
Group 1

ABSTRACTThis study was conducted to determine the increase in limb muscle explosive power. The training was conducted with 5 reps of 3 sets over six weeks in the field of Tegallalang 1 Public High School starting at 17.00 WITA until completion. In this study using 2 groups, namely the 1st group given jump training up and down the stands, the 2nd group was given jump training up and down the bench. The sample for each group is 8 people who have met the requirements of the male volleyball extra-curricular participants of Tegallalang 1 Public High School. Data from leg muscle explosive results obtained from 3 jumps taken before and after training. The results obtained before and after the Group-1 training were 57.5 cm to 70.875 cm and Group-2 were 57.375 cm to 65.75 cm. Hypothesis testing uses an independent t-test at a significance limit of 0.05 (p <0.05). Based on the differences in the results of the intergroup test analysis using independent t-test obtained group-1 and group-2 for p = 0.935 which showed no significant difference before being given treatment with a p value greater than 0.05. Whereas after treatment the group-1 and group-2 were obtained at p = 0.007 which showed a significant difference between groups 1 and 2 groups with a p value smaller than 0.05. It can be concluded that jumping up and down the stands is more effective than jump training up and down the bench in increasing the explosive power of the leg muscles. For this reason, it is expected that sports coaches to apply jumping up and down the stands as an alternative in increasing athletes' explosive power.Keywords: Training jumping up and down the stands, training jumping up and down the bench, explosive muscle power.

Randomised controlled study to assess skill retention at 6 vs 12 months after simulation training in shoulder dystocia

2017 ◽  
Vol 3 (4) ◽  
pp. 142-148
Author(s):  
Menelik M H Lee ◽  
Chao Ngan Chan ◽  
Betty Y T Lau ◽  
Teresa W L Ma
Keyword(s):  
Repeated Measures ◽  
Significant Interaction ◽  
Simulation Training ◽  
Shoulder Dystocia ◽  
Current Evidence ◽  
Controlled Study ◽  
Testing Time ◽  
Significant Difference ◽  
Group 2 ◽  
Group 1

IntroductionCurrent evidence suggests annual training in the management of shoulder dystocia is adequate. The aim of this trial is to test our hypothesis that skills start to decline at 6 months after training and further decline at 12 months.MethodsIn this randomised, single-blinded study, 13 obstetricians and 51 midwives were randomly assigned to attend a 1-hour mixed lecture and simulation session on shoulder dystocia management. Training was conducted on group 2 at month ‘0’ and on group 1 at month ‘6’. Their knowledge scores (primary outcome) were assessed before (pre-training), immediately after the training (at-training) and retested at month ‘12’ (post-training).ResultsTwo-way repeated-measures analysis of variance showed a statistically significant interaction between the testing time frame (pre-training, at-training and post-training) on the score (p<0.001), but no significant interaction between the groups on the score (p=0.458).Compared to pre-training, the score increased after the simulation training (at-training) in both group 1 (8.69 vs 14.34, p<0.001) and group 2 (9.53 vs 14.66, p< 0.001), but decreased at 6 months post- training in group 1 (14.34 vs 11.71, p<0.001) and at 12 months post-training in group 2 (14.66 vs 11.96, p< 0.001). However the score was better than before the training. There was no significant difference in the post –training score (11.71vs 11.96, p=0.684) between both groups.ConclusionsOur study demonstrated that simulation training results in short-term and long-term improvement in shoulder dystocia management however knowledge degrades over time. Ongoing training is suggested at a minimum of 12 months’ interval for all members of the obstetrics team including midwives and doctors.

scholarly journals Catch-up growth in children with late-diagnosed coeliac disease

2005 ◽  
Vol 94 (3) ◽  
pp. 437-442 ◽  
Author(s):  
A. K. Patwari ◽  
Gaurav Kapur ◽  
L. Satyanarayana ◽  
V. K. Anand ◽  
Amit Jain ◽  
...  
Keyword(s):  
Coeliac Disease ◽  
Repeated Measures ◽  
Anthropometric Parameters ◽  
Significant Difference ◽  
Marginal Means ◽  
Catch Up ◽  
Group 2 ◽  
Height For Age ◽  
Group 1

Anthropometric parameters and catch-up growth were prospectively evaluated in fifty late-diagnosed children with coeliac disease aged 2·25–10 years after 1–4 years of adhering to a strict gluten-free diet (GFD). The anthropometric parameters were expressed as Z scores relative to National Centre for Health Statistics standards using Epi Info 2000 (weight-for-height Z score (WHZ) and height-for-age Z score (HAZ)). Catch-up growth was evaluated by repeated measures. ANOVA, overall significance by an F test and pair-wise comparisons for estimated marginal means using the least significant difference. At the time of enrolment, no significant difference was observed in WHZ and HAZ between children diagnosed before (group 1) or after (group 2) 4 years of age. On follow-up, HAZ was significantly higher in group 1 after the first and third years of the GFD (P=0·04 and 0·02, respectively), with a non-significant increase after completing 4 years of the GFD (P=0·22). Feeding the GFD resulted in an overall significant (F=3·99, P=0·011) increase in HAZ up to 4 years of follow-up. However, the catch-up in height was incomplete, with stunting in sixteen (55·4 %) of twenty-nine children after 3 years and in seven (46·6 %) of fifteen children after 4 years on the GFD. Pair-wise comparisons demonstrated a linear catch-up growth during the initial follow-up on GFD. Treatment with the GFD did not result in an overall significant increase in WHZ up to 4 years of follow-up (F=1·01, P=0·42). Our results suggest that, in children with late-diagnosed coeliac disease, treatment with a GFD leads to a normalisation of body mass and a significant but incomplete recovery in HAZ during 4 years of follow-up.

Evaluation of cranial tibial and extensor carpi radialis reflexes before and after anesthetic block in cats

2016 ◽  
Vol 19 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Eduardo Alberto Tudury ◽  
Marcella Luiz de Figueiredo ◽  
Thaiza Helena Tavares Fernandes ◽  
Bruno Martins Araújo ◽  
Marília de Albuquerque Bonelli ◽  
...  
Keyword(s):  
Brachial Plexus Block ◽  
Neurologic Examination ◽  
Anesthetic Induction ◽  
Significant Difference ◽  
Before And After ◽  
Reflex Arc ◽  
Group 2 ◽  
Plexus Block ◽  
Extensor Carpi Radialis ◽  
Group 1

Objectives This study aimed to test the extensor carpi radialis and cranial tibial reflexes in cats before and after anesthetic block of the brachial and lumbosacral plexus, respectively, to determine whether they depend on a myotatic reflex arc. Methods Fifty-five cats with a normal neurologic examination that were referred for elective gonadectomy were divided into group 1 (29 cats) for testing the extensor carpi radialis reflex, and group 2 (26 cats) for testing the cranial tibial reflex. In group 1, the extensor carpi radialis reflex was tested after anesthetic induction and 15 mins after brachial plexus block with lidocaine. In group 2, the cranial tibial, withdrawal and patellar reflexes were elicited in 52 hindlimbs and retested 15 mins after epidural anesthesia. Results In group 1, before the anesthetic block, 55.17% of the cats had a decreased and 44.83% had a normal extensor carpi radialis reflex. After the block, 68.96% showed a decreased and 27.59% a normal reflex. No cat had an increased or absent reflex before anesthetic block. In group 2, prior to the anesthetic block, 15.38% of the cats had a decreased cranial tibial reflex and 84.62% had a normal response, whereas after the block it was decreased in 26.92% and normal in 73.08% of the cats. None of the cats had an increased or absent reflex. Regarding the presence of both reflexes before and after anesthetic block, there was no significant difference at 1% ( P = 0.013). Conclusions and relevance The extensor carpi radialis and cranial tibial reflexes in cats are not strictly myotatic reflexes, as they are independent of the reflex arc, and may be idiomuscular responses. Therefore, they are not reliable for neurologic examination in this species.

scholarly journals Comparing the effects of manual and ultrasonic instrumentation on root surface mechanical properties

2016 ◽  
Vol 10 (04) ◽  
pp. 517-521 ◽  
Author(s):  
Muhammad Sohail Zafar
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Study Groups ◽  
Control Group ◽  
Maximum Height ◽  
Root Planing ◽  
Average Maximum ◽  
Significant Difference ◽  
Group 2 ◽  
Group 1

ABSTRACT Objective: The aim of the current study is to analyze the surface profiles of healthy and periodontal-treated roots. In addition, manual and ultrasonic instrumentation methods have been compared in terms of surface mechanical properties of root surfaces including surface roughness, hardness, and elastic modulus. Materials and Methods: This study was conducted using extracted teeth that were randomly divided into two study groups (1 and 2). Root planing was performed using either Gracey curettes (Group 1) or ultrasonic scaler (Group 2). The noncontact profilometer was used to analyze surface roughness before and after root planing. A nanoindenter was used to analyze the surface mechanical properties. Results: The root planing treatment reduced the peak and valley heights hence decreasing the surface roughness. The average maximum height of peaks (Sp) and average maximum height of valleys (Sv) for control groups remain 83.08 ± 18.47 μm and 117.58 ± 18.02 μm. The Sp was reduced to 32.86 ± 7.99 μm and 62.11 ± 16.07 μm for Groups 1 and 2, respectively. The Sv was reduced to 49.32 ± 29.51 μm for Group 1 and 80.87 ± 17.99 μm Group 2. The nanohardness and modulus of elasticity for cementum of the control group remain 0.28 ± 0.13 GPa and 5.09 ± 2.67 GPa, respectively. Conclusions: Gracey curettes and ultrasonic scalers are capable of significantly reducing the roughness following root planing. Although Gracey curettes produced smoother surfaces than ultrasonic scalers, there was no significant difference.

scholarly journals Saliva Contamination Effect on Shear Bond Strength of Self-etching Primer with Different Debond Times

2007 ◽  
Vol 77 (5) ◽  
pp. 901-906 ◽  
Author(s):  
Tamer Turk ◽  
Selma Elekdag-Turk ◽  
Devrim Isci ◽  
Fethiye Cakmak ◽  
Nurhat Ozkalayci
Keyword(s):  
Control Group ◽  
Group 4 ◽  
Contamination Effect ◽  
Significant Difference ◽  
Before And After ◽  
Group 3 ◽  
Bond Strengths ◽  
Group 2 ◽  
Saliva Contamination ◽  
Group 1

Abstract Objective: To evaluate shear bond strengths (SBSs) of a self-etching primer (SEP) following saliva contamination at different stages of bonding at debond times of 5, 15, and 30 minutes and 24 hours. Materials and Methods: Two-hundred forty human premolars were divided into four groups: group 1, uncontaminated; group 2, saliva contamination after priming; group 3, saliva contamination before priming; and group 4, saliva contamination before and after priming. Four subgroups according to debond times of 5, 15, 30 minutes and 24 hours were composed. Metal brackets were bonded with an SEP (Transbond Plus) and light-cure adhesives paste (Transbond XT). SBS values and the adhesive remnants were determined. Results: The highest SBS was obtained at a debond time of 24 hours for the control group. This was significantly different from the other groups. SBSs at 5, 15, and 30 minutes showed no significant difference from each other in the control group (P &gt; .05). Lowest SBSs were obtained at a debond time of 5 minutes for groups 1, 2, 3, and 4 (8.38, 7.10, 7.06, and 6.26 MPa, respectively) and were not significantly different from each other (P &gt; .05). SBSs at 24 hours were not significantly different from each other for groups 2, 3, and 4 (P &gt; .05). Significant differences were found in the adhesive remnant (P &lt; .001). Conclusions: SEP (Transbond Plus) may produce clinically acceptable bracket bonding after 5, 15, and 30 minutes from time of placement on the teeth, even with light and heavy saliva contamination.

The Effect of a Charcoal-based Powder for Enamel Dental Bleaching

2020 ◽  
Vol 45 (6) ◽  
pp. 618-623 ◽  
Author(s):  
MC Franco ◽  
JLS Uehara ◽  
BM Meroni ◽  
GS Zuttion ◽  
MS Cenci
Keyword(s):  
Surface Roughness ◽  
Randomized Study ◽  
Dental Enamel ◽  
Control Group ◽  
Dental Bleaching ◽  
Significance Level ◽  
Significant Difference ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Clinical Relevance Charcoal based-powders are not effective for dental bleaching. SUMMARY Charcoal-based dentifrices for dental whitening are a novelty in the market. Manufacturers claim that such charcoal-based products have whitening, remineralization, antimicrobial, and antifungal properties of charcoal in such products. However, there is no substantial scientific evidence for these claims. This laboratory randomized study was designed to evaluate the whitening properties of a charcoal-based toothpowder. A total of 45 bovine dental enamel discs were randomly distributed into three groups (n=15): group 1, mechanical brushing with a 1450-ppm F toothpaste (control group); group 2, mechanical brushing with an activated charcoal-based powder; group 3, bleaching per the standard protocol using 10% carbamide peroxide. The surface roughness and color of each specimen were analyzed at baseline and after 14 days of experiment. The surface of one randomly selected specimen from each group was examined using a scanning electron microscope (SEM). The Kruskal-Wallis test was used to compare groups at a significance level of 5%. Only group 3 promoted a statistically significant effect on ΔE compared with groups 1 and 2 (p&lt;0.001 and p=0.003, respectively). No statistically significant difference was found between groups for surface roughness (p&gt;0.05). SEM revealed a more irregular surface in group 1 specimens compared with group 2 and 3 specimens. The charcoal-based powder did not seem to have any bleaching effect.

scholarly journals PENGARUH PEMBERIAN ULTRASOUND THERAPY DAN NEUROMUSCULAR TAPING DALAM MENINGKATAN AKTIVITAS FUNGSIONAL PADA KASUS OSTEOARTHRITIS LUTUT

2019 ◽  
Author(s):  
Trisna Narta Dewi, A.A.N ◽  
Yudi Pramana ◽  
Eka Septian Utama, A.A.Gd ◽  
Surya Adhitya P.Gd
Keyword(s):  
Functional Activity ◽  
Joint Disease ◽  
Control Group ◽  
Ultrasound Therapy ◽  
Functional Activities ◽  
A Value ◽  
Significant Difference ◽  
Before And After ◽  
Group 2 ◽  
Group 1

Background: Osteoarthritis is a complaint characterized by abnormalities in the cartilage of joints and bones nearby, this complaint is commonly felt and has become a chronic joint disease. Cartilage abnormalities will result in bones rubbing against each other, resulting in symptoms of stiffness, pain and restriction of movement in the joints that will affect the quality of functional activities performed. The aim of this study was to determine the effect of ultrasound therapy and neuromuscular taping (nmt) in increasing functional activity in cases of knee osteoarthritis.Research method: The study used experimental with randomized design type pre test and post test control group design. The study was divided into 2 groups, namely group 1 would receive Ultrasound intervention and group 2 would receive Ultrasound and neuromuscular taping intervention. The number of samples in this study was 11 samples per group so that the total number of samples in the two groups was 22 respondents. Measurements of knee functional activity values were measured by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire.Results: Group 1 with a value of p = 0,000 (p <0.05) which showed a significant difference between the value of tenderness before and after the intervention of ultrasound therapy. Group 2 obtained a value of p = 0,000 (p <0.05) indicating there was a significant difference between the value of tenderness before and after the intervention of ultrasound therapy and neuromuscular taping. The results of the calculation of the mean difference were p = 0,0001, the data showed that there was no difference in influence between groups, which means that the provision of ultrasound therapy and neuromuscular taping was no better in increasing functional activities of knee OA patients compared to ultrasound therapy.Conclusion: the provision of ultrasound therapy and neuromuscular taping is not better in increasing

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