Special technique for attachment incorporation with an implant overdenture

2003 ◽  
Vol 89 (1) ◽  
pp. 93-96 ◽  
Author(s):  
Walid M. Sadig
Keyword(s):  
Special Technique ◽  
Implant Overdenture

The effectiveness of waist-shaped and straight-shaped interdental brushes in cleaning implant overdenture attachments: a self-controlled clinical trial

2020 ◽  
Author(s):  
Qiuwen Chen ◽  
Yanjun Ge ◽  
Jinyou Chai ◽  
Hailan Feng ◽  
Jianzhang Liu ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Oral Hygiene ◽  
Respiratory Diseases ◽  
The Other ◽  
Controlled Clinical Trial ◽  
Cleaning Procedure ◽  
Plaque Removal ◽  
Line Angle ◽  
Implant Overdenture ◽  
Interdental Brush

Elderly patients often find it challenging to remove plaque accumulated on the attachments of implant overdentures (IOD) using conventional cleaning instruments. Further, excessive plaque accumulation can lead to peri-implant diseases and occasionally to respiratory diseases. Therefore, here, we aimed to compare the effectiveness of waist-shaped interdental brushes (WIB) with that of straight-shaped ones (SIB) in plaque removal from the locator attachments of IOD. Twenty participants with two locator attachments retaining mandibular IOD participated in this study. After the baseline cleaning, the participants refrained from oral hygiene maintenance for 3 days. A dentist cleaned one of the attachments using the WIB and the other attachment using the SIB. The pre- and post-cleaning modified plaque index (mPLI) scores were recorded. Following another 3 days free from oral hygiene maintenance, the trained participants repeated the same cleaning procedure using the WIB and SIB. Pre- and post-cleaning mPLI scores were recorded. Regardless of the type of brush used, the post-cleaning mPLI scores were lower than the pre-cleaning ones. After the cleaning procedure, the overall mean mPLI score was lower in the WIB group than in the SIB group. The post-cleaning mPLI scores at the line-angles and on the axial surfaces of the attachments were also lower in the WIB group than in the SIB group. There was no difference in the cleaning effectiveness between the dentist and participants when they used the same type of interdental brush. The WIB was significantly more efficient in plaque removal than the SIB, especially at the line-angle sites.

The Bending, Buckling, and Flexural Vibration of Simply Supported Polygonal Plates by Point-Matching

1961 ◽  
Vol 28 (2) ◽  
pp. 288-291 ◽  
Author(s):  
H. D. Conway
Keyword(s):  
Hydrostatic Pressure ◽  
Boundary Conditions ◽  
Flexural Vibration ◽  
Frequency Equation ◽  
Numerical Results ◽  
Special Technique ◽  
Point Matching ◽  
Buckling Loads ◽  
Simply Supported ◽  
Flexural Vibrations

The bending by uniform lateral loading, buckling by two-dimensional hydrostatic pressure, and the flexural vibrations of simply supported polygonal plates are investigated. The method of meeting the boundary conditions at discrete points, together with the Marcus membrane analog [1], is found to be very advantageous. Numerical examples include the calculation of the deflections and moments, and buckling loads of triangular square, and hexagonal plates. A special technique is then given, whereby the boundary conditions are exactly satisfied along one edge, and an example of the buckling of an isosceles, right-angled triangle plate is analyzed. Finally, the frequency equation for the flexural vibrations of simply supported polygonal plates is shown to be the same as that for buckling under hydrostatic pressure, and numerical results can be written by analogy. All numerical results agree well with the exact solutions, where the latter are known.

The Possibility of Visualizing Temperature Fields Using Digital Holographic Interferometry

2013 ◽  
Vol 284-287 ◽  
pp. 988-995 ◽  
Author(s):  
Tomáš Vít ◽  
Vít Lédl ◽  
Roman Dolecek ◽  
Pavel Psota
Keyword(s):  
Holographic Interferometry ◽  
Rapid Change ◽  
Optical Methods ◽  
Temperature Fields ◽  
Constant Current ◽  
Special Technique ◽  
Limiting Factor ◽  
Measured Temperature ◽  
Hot Wire ◽  
First Results

The presented paper compares results of measured temperature fields achieved by digital holographic interferometry (DHI) and hot wire anemometry. It shows the possibility of using holographic interferometry for the visualization of temperature fields in periodically moving fluids. The measurement of temperature fields in moving fluids has many inherent difficulties. The usage of point temperature measurement methods, such as Constant Current Anemometry (CCA), is limited to frequencies up to 3000 Hz. This frequency should be the limiting factor for using CCA in fluids when a rapid change of temperature occurs. This shortcoming of CCA measurements could be overcome through the use of optical methods such as digital holographic interferometry. It is necessary to employ a special holographic setup with double sensitivity instead of the commonly used Mach-Zehnder type of holographic interferometer in order to attain parameters sufficient for the studied case. This setup is not as light-efficient as the Mach-Zehnder type but has double sensitivity. The special technique of acquiring and phase averaging the results from holographic interferometry is presented. The paper also shows the first results of an evaluated 3D temperature field.

Attachment systems for implant overdenture: influence of implant inclination on retentive and lateral forces

2011 ◽  
Vol 22 (11) ◽  
pp. 1315-1319 ◽  
Author(s):  
Tsung-Chieh Yang ◽  
Yoshinobu Maeda ◽  
Tomoya Gonda ◽  
Sunny Kotecha
Keyword(s):  
Lateral Forces ◽  
Implant Overdenture

scholarly journals Precise Percutaneous Coronary Intervention of LAD Ostial Stenosis by Using Afzal’s Technique: An easy but Innovative Procedure

2016 ◽  
Vol 9 (1) ◽  
pp. 49-54
Author(s):  
Afzalur Rahman ◽  
Farhana Ahmed ◽  
Mohammad Arifur Rahman ◽  
Syed Nasir Uddin ◽  
Md Zillur Rahman ◽  
...  
Keyword(s):  
Percutaneous Coronary Intervention ◽  
De Novo ◽  
Coronary Revascularization ◽  
Coronary Intervention ◽  
Target Lesion ◽  
Special Technique ◽  
Stent Deployment ◽  
Percutaneous Coronary ◽  
Stent Length

Background: The ostial left anterior descending coronary artery (LAD) lesion is an important target for coronary revascularization because its location subtends a large territory of myocardium. Ostial lesions have a reputation of being fibrotic, calcified, and relatively rigid. Greater degraees of rigidity and recoil resulted in lower acute gain and higher rates of target lesion revascularization (TLR) following percutaneous coronary intervention (PCI). In addition, procedural complications such as dissections, vessel closure and myocardial infarction were more frequent. Aim of the study was to evaluate a simple but innovative technique to deal with significant LAD ostial lesion.Methods: This prospective study was conducted between January 2010 and February 2013. Patients with significant angiographic de novo ostial LAD artery stenoses were identified and screened for study eligibility. An ostial stenosis was defined as an angiographic narrowing of e” 70% located within 3 mm of the vessel origin. Study included all consecutive patients with ostial lesions who underwent elective PCI and stent deployment. The study population consisted of 36 patients.Results: Among 36 patients 27 (75%) were male. mean age was 55.75 ± 8.07 years. 21 (58.3%) had diabetes, 15 (41.7%) hypertension, 21 (58.3%) hypercholesterolemia, 24 (66.66%) were smoker and 18 (50%) had F/H of CAD. Among them 6 (16.7%) had STEMI, 9 (25%) had NSTEMI, 12 (33.3%) had UA and 9 (25%) CSA. CAG showed 15 (41.7%) SVD, 15 (41.7%) DVD and 6 (16.7%) were TVD. LAD ostial stenosis were 83.16 ± 10.14%. Considering procedural characteristics, DES were 33 (91.7%) and BMS were 3 (8.3%). DES polymers were Evarolimus 15 (41.7%), Zotarolimus 12 (33.3%) and Biolimus 6 (16.7%). Mean stent length were 21.75 ± 8.07 mm. Mean stent diameter were 2.83 ± 0.28 mm. Minimum follow up time was 9 months and maximum follow up time was 44 months. There were no MACE but Angina (CCS II) were 2 (5.55%) and LVF (NYHA II) were 1(2.77%).Conclusion: Precise placement of LAD ostial stent is always challenging. Several technique applied but results not always satisfactory. Our strategies were precise location of stent implantation at ostium by adopting special technique of simultaneous balloon placement from distal LM to proximal LCX preventing unwanted stent movement during its placement and also properly guiding us for precise stent placement at the ostium. Parked balloon from distal LM to LCX will also be helpful for quick measure for any plaque shifting into LCX.Cardiovasc. j. 2016; 9(1): 49-54

Nonlinear semi-analytical nonlocal strain-gradient dynamic response investigation of phase-transition-induced transversely graded hierarchical viscoelastic nano/microplates

2019 ◽  
Vol 233 (15) ◽  
pp. 5388-5409 ◽  
Author(s):  
M Shariyat ◽  
F Farrokhi
Keyword(s):  
Strain Gradient ◽  
Viscoelastic Model ◽  
Functionally Graded ◽  
Special Technique ◽  
Stress And Strain ◽  
Transient Vibration ◽  
Size Dependent ◽  
Integration Schemes ◽  
Series Type ◽  
Nonlocal Strain Gradient

A functionally graded Boltzmann hierarchical viscoelastic model with both stress- and strain-gradient nonlocalities is developed and implemented to extract results that are more precise than results of Eringen's nonlocal elasticity model. The available size-dependent vibration analyses of the nano/microplates have focused on the frequency analysis and even not the time-dependent transient vibration analyses. In the present research, the forced and transient responses of the microplates are studied comprehensively, for the first time, using a three-element standard solid viscoelastic model. The studied transversely symmetric graded viscoelastic microplate and the relevant function of the material properties variations contain notable hints as well. Furthermore, the resulting new sixth-order nonlocal strain gradient integrodifferential equations are solved by a special technique that includes an analytical spatial Navier series-type solution and a trapezoidal and Runge–Kutta integration schemes, in time domain. Finally, the influences of the stress- and strain-gradient nonlocality parameters and the viscoelasticity parameters on the dynamic behaviors of the viscoelastic FGM microplates are investigated in details. Results show that the effects of the strain gradient nonlocality on the viscodynamic results may be much remarkable than those of the length scale nonlocality, in microscales.

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