scholarly journals Influence of Toothbrush Abrasion and Surface Treatments on Roughness and Gloss of Polymer-Infiltrated Ceramics

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3694
Author(s):  
Nawaf Labban ◽  
Mohammad D. Al Al Amri ◽  
Sarah M Alnafaiy ◽  
Saleh M. Alhijji ◽  
Mohammad A. Alenizy ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Mean Value ◽  
Control Group ◽  
P Value ◽  
Distilled Water ◽  
Storage Medium ◽  
Significant Difference ◽  
Toothbrush Abrasion ◽  
Surface Gloss

The aim of this study was to compare the surface roughness and gloss of polymer-infiltrated ceramics after simulated in vitro toothbrushing in different storage mediums. Four polymer- infiltrated ceramics were evaluated, Lava ultimate (LU), Vita enamic (EN), Shofu (SH), and Crystal ultra (CU). The control group was a feldspathic ceramic, Vita Mark II (VM). One hundred and twenty specimens (12 × 14 × 2.5 mm) were prepared using a precision saw. For each material (n = 24), the specimens were allocated into two groups, polished and stained. The specimens of each group were stored (for 7 days) in either citric acid (0.2N) or distilled water. Data for surface gloss (ΔE*SCE-SCI) and roughness (Ra) were evaluated before (baseline) and after simulated toothbrushing. For toothbrushing simulation, a toothpaste slurry containing a toothpaste of 100 relative dentin abrasion (RDA) and 0.3 mL distilled water was used for 3650 cycles (7300 strokes) for each specimen. Data were analyzed using t-test and ANOVA. A p-value of ≤ to 0.05 was considered significant. The highest mean value of surface gloss was identified in CU (stained—water) (4.3 (0.47)) (ΔE*) and EN (stained—acid) (4.3 (1.00)) (ΔE*) specimens, whereas the lowest mean value was shown by SH (stained—acid) (2.04 (0.42)) (ΔE*) samples. The highest mean value of surface roughness was observed in SH (0.40 (0.99)) Ra (stained—acid) whereas the lowest in VM (0.13 (0.039)) Ra (polished—water). A significant difference (p < 0.05) was observed in surface roughness and gloss between the materials with simulated toothbrushing, except in VM and LU, respectively. Therefore, it can be concluded that simulated toothbrushing impacts on surface roughness and gloss, irrespective of the storage medium.

scholarly journals Assessment of the Tissue Response to Modification of the Surface of Dental Implants with Carboxyethylphosphonic Acid and Basic Fibroblastic Growth Factor Immobilization (Fgf-2): An Experimental Study on Minipigs

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 358
Author(s):  
Javier Aragoneses ◽  
Ana Suárez ◽  
Nansi López-Valverde ◽  
Francisco Martínez-Martínez ◽  
Juan Manuel Aragoneses
Keyword(s):  
Surface Treatment ◽  
Test Group ◽  
Mean Value ◽  
Control Group ◽  
P Value ◽  
Implant Surface ◽  
Bone Contact ◽  
Bone Implant ◽  
Significant Difference ◽  
The Mean

The aim of this study was to evaluate the effect of implant surface treatment with carboxyethylphosphonic acid and fibroblast growth factor 2 on the bone–implant interface during the osseointegration period in vivo using an animal model. The present research was carried out in six minipigs, in whose left tibia implants were inserted as follows: eight implants with a standard surface treatment, for the control group, and eight implants with a surface treatment of carboxyethylphosphonic acid and immobilization of FGF-2, for the test group. At 4 weeks after the insertion of the implants, the animals were sacrificed for the histomorphometric analysis of the samples. The means of the results for the implant–bone contact variable (BIC) were 46.39 ± 17.49% for the test group and 34.00 ± 9.92% for the control group; the difference was not statistically significant. For the corrected implant–bone contact variable (BICc), the mean value of the test group was 60.48 ± 18.11%, and that for the control group, 43.08 ± 10.77%; the difference was statistically significant (p-value = 0.035). The new bone formation (BV/TV) showed average results of 27.28 ± 3.88% for the test group and 26.63 ± 7.90% for the control group, meaning that the differences were not statistically significant (p-value = 0.839). Regarding the bone density at the interthread level (BAI/TA), the mean value of the test group was 32.27 ± 6.70%, and that of the control group was 32.91 ± 7.76%, with a p-value of 0.863, while for the peri-implant density (BAP/TA), the mean value of the test group was 44.96 ± 7.55%, and that for the control group was 44.80 ± 8.68%, without a significant difference between the groups. The current research only found a significant difference for the bone–implant contact at the cortical level; therefore, it could be considered that FGF-2 acts on the mineralization of bone tissue. The application of carboxyethylphosphonic acid on the surface of implants can be considered a promising alternative as a biomimetic coating for the immobilization of FGF-2. Despite no differences in the new bone formation around the implants or in the interthread or peri-implant bone density being detected, the biofunctionalization of the implant surface with FGF-2 accelerates the mineralization of the bone–implant interface at the cortical level, thereby reducing the osseointegration period.

scholarly journals Effect of Application Time of Two Different Disinfectants on the Surface Roughness of an Elastomeric Impression Material

2020 ◽  
Author(s):  
Tahir Karaman ◽  
Faruk Oztekin ◽  
Samet Tekin
Keyword(s):  
Surface Roughness ◽  
Sodium Hypochlorite ◽  
Quaternary Ammonium ◽  
Rank Test ◽  
Control Group ◽  
P Value ◽  
Sodium Hypochlorite Solution ◽  
Application Time ◽  
Impression Material ◽  
Significant Difference

Introduction: Pathogens, such as cytomegalovirus, hepatitis B virus, hepatitis C virus, herpes simplex virus types 1 and 2, and human immunodeficiency virus are transmitted, threatening the health of dental laboratory workers, especially as a result of saliva and blood contact of patients. To prevent cross-infection, impression materials should be disinfected at the end of the impression process in the mouth. Aim: To study the effect of application time of sodium hypochlorite and quaternary ammonium-based disinfectant solution on the surface roughness of an elastomeric impression material. Materials and Methods: In this in-vitro study done during March 2020, 10 disc-shaped samples were used in each group, with a total of 110 samples obtained from a light body elastomeric impression material with dimensions of 15×3 mm. The samples were kept in a sodium hypochlorite solution (Wizard; Rehber Kimya, Istanbul, Turkey) at concentrations of 1% and 5% for 1, 5, 10, and 30 minutes and in a quaternary ammonium-based disinfectant (Zeta 7 Solution, Zhermack SpA, Italy) for 10 and 30 minutes. Surface roughness measurements were taken with a profilometer device. The data obtained were statistically analysed by Kolmogorov-Smirnov test and Wilcoxon signed rank test for dependent/paired groups for the continuous data. The significance level was set to α=0.05. Results: A statistically significant difference was found between the control group and the 1% sodium hypochlorite (30 min p-value 0.037), and 5% sodium hypochlorite (30 min p-value 0.017). The statistical evaluation of the surface roughness of the samples with different concentrations of sodium hypochlorite and the same times was done and found statistically significant at 30 mins, p-value 0.021. Conclusion: The prolonged application of the sodium hypochlorite disinfectant at 1% and 5% concentrations caused a significant increase in the light body elastomeric impression material’s surface roughness

scholarly journals Milled versus moulded mock-ups based on the superimposition of 3D meshes from digital oral impressions: a comparative in vitro study in the aesthetic area

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Francesca Cattoni ◽  
Giulia Teté ◽  
Alessandro Mauro Calloni ◽  
Fabio Manazza ◽  
Giorgio Gastaldi ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Test Group ◽  
In Vitro Study ◽  
Mean Value ◽  
Digital Impression ◽  
Control Group ◽  
Minimal Invasiveness ◽  
Significant Difference ◽  
The Aesthetic

Abstract Background Aesthetic porcelain veneers proved to be a long-term reliable prosthetic solution, ensuring minimal invasiveness. The use of veneers requires an adhesive cementation technique, so maintaining as much enamel as possible is to ensure lasting success. A diagnostic mock-up is a key tool that allows a preview of the outcome of the aesthetic restoration: it is obtainable both in an analog and digital way. With the recent developments in impression technology and the ever so fast growing use of CAD-CAM technologies it is useful to understand the pros and cons of either one of these techniques (analog and digital) in order to identify the easier and more convenient workflow in aesthetic dentistry. Methods After taking pictures and impressions of the dental arcs of a patient in need of aesthetic rehabilitation, 52 resin models were produced and a digital drawing of the smile was outlined. Both an analog and a digital wax-up were obtained from two of the 52 models: the latter was obtained using digital impressions and a dedicated software. The analog wax-up was then used to produce 25 matrices that have later been used to mould 25 resin mock-ups using a traditional moulding protocol (Control Group - CG). The digital wax-up was used to mill 25 PMMA mock-ups. Each mock-up, both milled and moulded (total 50), was then laid on the other 50 resin models as a digital impression of it was taken. The STL. files of the milled mock-ups were compared with the 3D CAD wax-up made using a specific software. The STL. files of the analog printed mock-ups were compared with the traditional wax-up design. A statistical analysis was carried out to evaluate the difference between the groups. Results The statistical analysis showed a significant difference (P > 0.01) between the mean value of the distance between the points of the overlapping STL. meshes in GC (0.0468 mm) and in TG (Test Group - TG) (0,0109 mm). Conclusions The study showed a difference in accuracy between traditional moulded and milled mock-ups compared to their original wax-up. The data analysis reports that the digital method allows for greater accuracy. Within the limitations of this study, a fully digital workflow is to considered more reliable when it come to creating an esthetic mockup: the digital procedure has been shown to be more accurate than the one made manually which is much more operator dependent and it brings an increase to the chance of error, and that could ultimately affect the final result.

scholarly journals Analysis of Surface Roughness and 3D Scanning Topography of Zirconia Implants Before and After Photofunctionalisation by 3D Optical Profilometry- An Invitro Study

2021 ◽  
Author(s):  
Arunjaikumar Ravindran ◽  
Suma Karthigeyan ◽  
Ramesh Bhat ◽  
Madhulika Naidu ◽  
Senthilnathan Natarajan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Roughness Parameter ◽  
In Vitro Study ◽  
Control Group ◽  
P Value ◽  
Study Group ◽  
Optical Profilometry ◽  
Before And After ◽  
Zirconia Implants

Introduction: Zirconia is considered as an alternative material for the fabrication of implants. Surface roughness of the implant plays a fundamental role in the initial bone formation. The rationale of using 3D optical profilometry in this study was to evaluate the surface roughness of the zirconia implants before and after Ultraviolet (UV) photofunctionalisation. Also, Moreso 3D optical instruments have a better resolution than the mechanical ones like Atomic Force Microscopy (AFM). Aim: To analyse the surface roughness and topography of zirconia implants after photofunctionalisation using optical profilometry. Materials and Methods: This is an in-vitro study conducted over a period of six months from March 2020 to August 2020. Ten commercially machined Zirconia implants, five each in study and control group, were micro analysed at three different regions (abutment, thread and crest) by optical profilometry. Study group was surface treated by UV radiation for 48 hours. Quantitative morphometric analysis was done between two groups and p-value less than 0.05 was considered statistically significant. The statistical test applied in this study was independent t-test. Results: Scanning micrographs of the study group revealed highest density of summits contributing to increased surface area in the study group. Quantitative analysis of surface roughness showed statistically significant higher mean roughness parameter for photofunctionalised implants in abutment, crest and thread region (p<0.05). Conclusion: Photofunctionalisation is a potentially synergistic technique in producing textured zirconia implants.

scholarly journals The Impact of Strengthening Exercise on Dynamic Balance in Patients with Knee Osteoarthritis

2021 ◽  
Vol 15 (10) ◽  
pp. 3429-3431
Author(s):  
Shenbaga Subramanian Sundaram ◽  
Makesh Babu Subramanian ◽  
Riziq Allah Mustafa Gaowgeh ◽  
Mikhled Falah Maayah ◽  
Ziyad Neamatallah ◽  
...  
Keyword(s):  
Knee Osteoarthritis ◽  
Dynamic Balance ◽  
Mean Value ◽  
Control Group ◽  
P Value ◽  
Strengthening Exercise ◽  
Significant Difference ◽  
The Mean ◽  
The Impact ◽  
Experimental Group

Background: Knee osteoarthritis is characterised clinically by usage-related pain and/or functional limitation. OA that is associated with physical dysfunction and decline in health-related quality of life caused the main disability worldwide and is expected to increase due to aging and obesity rates and further load on the population and health system. The strengthening exercises that normally used is knee flexion and extensions, isometric quadriceps exercise, isometric hamstring exercise, and sit to stand to improve the balance. Objectives: is to find out the impact of Strengthening exercise on Balance in patients with knee Osteoarthritis Study Design: Quasi experimental study Methods: Fifty-six (n=56) of knee OA patients were involved in this study by judgemental sampling design. Researcher will first demonstrate and explain the Y-balance tools testing procedure based on Plisky and colleagues study. Participants are given to practice six trials before the formal testing, stated that SEBT have a significant learning effect and found that the reaching distances reached the longest distance after six trials and then will be constant. Results: Independent t-test shows significant difference in only anterior direction. In the experimental group the mean value is 69.83 with a SD of 11.62 while in the control group the mean value is 63.51 with a SD of 11.36; p-value of .045 and t-value of 2.056. In postero-lateral directions result shows there is no significant difference, experimental group the mean value is 91.10 with a SD of 9.74 while in control group mean value is 90.88 with SD value of 12.68; p-value of .947 and t-value of .067. Result of postero-medial shows no significant difference too, in experimental group the mean value of 95.16 with SD of 10.92 while in control group the mean value is 93.40 with SD of 8.20; p=value of .501 and t-value of .678. Conclusion: This study has proven strengthening exercise using YBT improved only anterior direction of YBT but no significant difference in postero-lateral and postero-medial direction. Key Words: Knee Osteoarthritis, Strengthening exercise, Dynamic Balance, Star excursion test

scholarly journals Antimicrobial and mechanical acrylic resin properties with silver particles obtained from Fusarium oxysporum

2018 ◽  
Vol 21 (1) ◽  
pp. 96 ◽  
Author(s):  
Tabata Prado Sato ◽  
Celio Ilidio Conjo ◽  
Rodnei Dennis Rossoni ◽  
Juliana Campos Junqueira ◽  
Renata Marques de Melo ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Fusarium Oxysporum ◽  
Biofilm Formation ◽  
Antimicrobial Agents ◽  
Acrylic Resin ◽  
Control Group ◽  
Significant Difference ◽  
Color Alteration ◽  
Cie Lab

<p><strong>Objective: </strong>This study evaluated the effects of the incorporation of silver nanoparticles (AgNPs) obtained from <em>Fusarium oxysporum</em> on heat-activated acrylic resin (HAAR) and their influence on resin’s surface roughness, hardness, color alteration and antimicrobial capacity against <em>Candida albicans</em>. <strong>Material and Methods:</strong> For this, 50 discs of HAAR (2x5 mm) were produced and divided into three groups, Control: HAAR; Ag1: HAAR plus 0.539 mg of AgNPs; and Ag2: HAAR plus 1.1 mg of AgNPs. Knopp hardness (HK), surface roughness (Ra and Rz) and color alteration according to the CIE Lab were measured. Specimens were then evaluated <em>in vitro</em> with regard to <em>C. albicans</em> biofilm formation through formed colony count (CFU/mL). Scanning Electron Microscopy (SEM) and Atomic force microscopy (AFM) analyses were performed. <strong>Results:<em> </em></strong>The addition of AgNPs of both concentrations changed Ra, Rz and HK significantly. There was statistically significant difference for L (p=0.00); a*(p=0.00) and b*(p=0.00) parameters. There were no differences between Ag1 and Ag2 biofilm formation, but the comparison of both with the control group presented a significant reduction (p=0.0091) on biofilm formation. SEM and AFM images showed no signs of NPs clustering. <strong>Conclusion:</strong> It can be concluded tha AgNPs incorporation in HAAR was effective in reducing <em>C. albicans</em> activity, with a slight change in color and hardness of the material, being effective therefore, in regions such as the dental prostheses palate, which have lesser aesthetic appeal.</p><p><strong>Keywords</strong></p><p>Acrylic resins; Silver; Antimicrobial agents.</p>

scholarly journals Effects of posterior capsule stretch on adhesive capsulitis.

2019 ◽  
Vol 26 (08) ◽  
pp. 1272-1277
Author(s):  
Madiha Maryam ◽  
Muhammad Kashif ◽  
Abdul Ghafoor Sajjad ◽  
Razia Rizwan ◽  
Sehrish Ali ◽  
...  
Keyword(s):  
Internal Rotation ◽  
Manual Therapy ◽  
Functional Disability ◽  
Adhesive Capsulitis ◽  
Mean Value ◽  
Control Group ◽  
P Value ◽  
Significant Difference ◽  
Group A ◽  
Group B

To compare the effect of posterior capsular stretch on pain, ROM and functional disability in Adhesive Capsulitis. Study Design: Experimental, Randomized Control Trail. Setting: Department of Physiotherapy, Capital Development Authority Hospital Islamabad. Period: October 2015 to March 2016. Materials and Methods: Forty female patients having aged between 40 to 70 years with freezing and frozen stage of adhesive capsulitis were screened out. Adhesive capsulitis secondary to cervical Spondylosis, osteoporosis, direct trauma and any inflammation were excluded from the study. Subjects were randomly placed into two groups lottery method, the experimental group having 19 subjects received posterior capsular stretch along with conventional manual therapy and electrotherapy  whereas the control group had 21 subjects and they were given manual therapy and electrotherapy alone. The Numeric Pain Rating Scale, Shoulder Pain and Disability Index, and Range of Motion of shoulder joint were used as outcome measures. All the patients were assessed at baseline before intervention and at the completion of 6 weeks of treatment. Data was analyzed using SPSS version 20. Results: Abduction, Internal Rotation and disability show significant result. The abduction mean value of Group A was 115.00±22.023and of the Group B was 81.74±20.653 with p value was P<05. The internal rotation mean value of Group A was 70.71±12.776 and for the Group B was 60.32±8.699 and having p value P<05. The SPADI mean value of Group A was 51.76±22.043 and for the Group B was 24.24±7.287 having p value P<05. The NPRS and external rotation showed non-significant difference. Conclusion: It is concluded that posterior capsular stretch along with mobilization is more effective in treating ROM and functional disability.

Important Role of B2-Glycoprotien in Females with Recurrence Abortion

2018 ◽  
Vol 9 (01) ◽  
Author(s):  
Ahmed Abbas Hasan ◽  
Radhia Hussain Fadel ◽  
Saeed Hilal Khudhair ◽  
Doaa Hashim Jawad
Keyword(s):  
Pearson Correlation ◽  
Mean Value ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
P Value ◽  
Recurrent Abortion ◽  
Significant Difference ◽  
Medical City ◽  
And Gender ◽  
Age Range

Recurrent abortion consider as one of the most common problem in world. There are different causes associated with recurrent abortion, these may be occur due to complication of microorganism infection or associated with immunological disturbance like abortion caused by Anti-phospholipid syndrome, or associated with SLE. The anti-b2glucoprotien antibodies have a role in abortion. In this study, we wish to determine whether there is a relationship between the levels of these anti-b2glucoprotien antibodies and abortion. Thirty females patients with spontaneous abortion (10 of them with Antiphospholipid syndrome,10 of them with systemic lupus erthymatosus and final 10 with toxoplasmosis with ages ranged between (20-46) where taken from (Al-Hussein Medical City/Kerbala). Control group consisted of 20 healthy people who were free from history of abortion who matched in age and gender with patients. B2gp(IgMandIgG) EASIA Kit, generic assay) and was studied using the enzyme-linked immunosorbent assay (ELISA) method. T-test and ANOVA and Pearson correlation used to analyze results by using SPSS version 24. P-value ≤ 0.05 was considered significant. The patients with age range blow 30 years show high percent(63.3%) among the other groups .most of the patients have high percent of 3 times abortion were reported in all different groups .The mean value of anti-B2gP-I IgG (45.354) show highly a significant difference results in aborted patients with APS and significant difference in patients with SLE when compared with controls groups. the Anti-B2gPI IgM not give statistically significant difference when camper to health cases. we conclude that the Anti-B2GPI IgG levels were increased significantly in aborted females with APS and SLE .

scholarly journals Effect of Different Dentifrices on the Surface Roughness of Acrylic Resins: An in vitro Study

2017 ◽  
Vol 18 (8) ◽  
pp. 679-682
Author(s):  
Nitin Gautam ◽  
Aditi Sharma ◽  
Unjum Bashir ◽  
Sisir Rapolu ◽  
Nallamilli Mamatha ◽  
...  
Keyword(s):  
Surface Roughness ◽  
In Vitro Study ◽  
Positive Association ◽  
Acrylic Resin ◽  
Control Group ◽  
Distilled Water ◽  
Acrylic Resins ◽  
Type Size ◽  
Utmost Care

ABSTRACT Aim This study was undertaken to study the effect of three most commonly used dentifrices for denture cleaning and to find out any positive association between number of strokes by toothbrush and surface roughness of acrylic resin. Materials and methods About 40 acrylic rectangular blocks with high finish were polished until surface roughness was calculated as 0 µm. The materials tested were distilled water as a control group, Patanjali Dant Kanti, Colgate Total Cream, and Cleansodent as dentifrices. Stroking was done with dentifrices, and surface roughness readings were recorded at 1,000, 9,000, and 18,000 strokes. Results Patanjali Dant Kanti was found to have maximum abrasive potential followed by Colgate Total Cream, followed by Cleansodent and least by distilled water. Conclusion Surface roughness was found to be directly proportional to the type, size, and fineness of the abrasive component used; the professional denture cleanser (Cleansodent) has less abrasive potential than the regular toothpastes. Among those tested, the highest abrasive potential was found in Patanjali Dant Kanti and lowest by Cleansodent (denture cleanser). Clinical significance The patient as well as dentist should choose the dentifrice with utmost care noting the size and type of abrasives used. Washing the dentures normally with water without toothbrush daily and cleaning of dentures once in 10 to 15 days with a soft toothbrush and professional denture cleanser should be the line of maintenance of dentures. How to cite this article Gautam N, Sharma A, Bashir U, Rapolu S, Mamatha N, Sravani S. Effect of Different Dentifrices on the Surface Roughness of Acrylic Resins: An in vitro Study. J Contemp Dent Pract 2017;18(8):679-682.

scholarly journals Gingerly effervescent tablets: investigating the effect of cytotoxicity on gingival fibroblasts and antimicrobial properties under laboratory conditions

2019 ◽  
Vol 9 (6) ◽  
pp. 4534-4538
Keyword(s):  
Antimicrobial Properties ◽  
Live Cells ◽  
Control Group ◽  
P Value ◽  
Gingival Fibroblast ◽  
Gingival Fibroblasts ◽  
Laboratory Conditions ◽  
Significant Difference ◽  
Effervescent Tablet

Ginger is a medicinal plant with antioxidant, anti-bacterial, anti-inflammatory and anti-fungal properties. The shape of effervescent tablet is a new form of this product for use as a mouthwash. This study investigated the cytotoxicity and antimicrobial properties of gingerly effervescent tablets under laboratory conditions. In this study, MTT assay was done to evaluate in-vitro gingival fibroblast cytotoxicity during 24, 48 and 72 hours. In addition, the effect of antimicrobial properties on common bacterial and oral fungi was investigated. P- value was considered significantly less than 0.05. There was no significant difference between the mean of live cells in groups with 24, 48 and 72 duration (P-value = 0.071). There was no significant difference between ginger group and control group (P<0.05). Minimum inhibitory concentration (MIC) of effervescent tablet was different, ranging from 10 mg/ml for Candidas family to 20 mg/ml for Staphylococcus and 40 mg/ml for negative grams. According to the results, it can be concluded that gingerly effervescent tablets have no toxic effect after 72 hours of exposureto gingival fibroblasts. Its suitable antimicrobial properties for fungi makes it useful for the control of infection and as an ideal mouthwash.

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