Customized disposable intravitreal injection kit vs conventional stainless steel instruments for intravitreal injection. A comparison

2020 ◽  
pp. 1
Author(s):  
Hussain Khaqan ◽  
Usman Imtiaz ◽  
Irfan Malik ◽  
Bilal Qureshi ◽  
Ateeq Rehman
Keyword(s):  
Stainless Steel ◽  
Intravitreal Injection ◽  
Conventional Stainless Steel

scholarly journals Pillow positioning facilitates independent bridging for bedpan use in pelvic fractures

1992 ◽  
Vol 48 (3) ◽  
pp. 41-44 ◽  
Author(s):  
Jeanette A. Fourie ◽  
Eileen M.P. Lief ◽  
Timothy T. Dunne
Keyword(s):  
Clinical Trial ◽  
Stainless Steel ◽  
Pelvic Fractures ◽  
Control Group ◽  
Mechanical Advantage ◽  
Block Randomisation ◽  
Significant Difference ◽  
Experimental Group ◽  
Conventional Stainless Steel

The idea of giving a patient with fractures of the pelvis a mechanical advantage, by placing pillows under his/her back in order to make bridging for the bedpan easier, was tested in this clinical trial. Twenty nine subjects were entered by block randomisation into the experimental group and twenty nine into the control group. The number of days from entry into the trial until independent bridging was noted. Independent bridging is defined as the patient being able to lift high enough to slide a conventional stainless steel bedpan under the buttocks. Results show that there is a significant difference in time to bridging (Y = 0,602, p = 0,0027) in favour of the experimental group. Other variables studied appear to marginally favour the control rather than the experimental group, thus suggesting that the pillow method could be used safely and effectively in the treatment of patients who have sustained a range of pelvic fractures.

scholarly journals Comparison of Galvanic Corrosion Potential of Metal Injection Molded Brackets to that of Conventional Metal Brackets with Nickel-Titanium and Copper Nickel-Titanium Archwire Combinations

2013 ◽  
Vol 14 (3) ◽  
pp. 488-495 ◽  
Author(s):  
S Chidambaram ◽  
M Vijay ◽  
D Praveen Kumar Varma ◽  
K Baburam Reddy ◽  
D Ravindranath ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Potential ◽  
Galvanic Corrosion ◽  
Nickel Titanium ◽  
Copper Nickel ◽  
Conventional Brackets ◽  
Titanium Wire ◽  
Conventional Bracket ◽  
Conventional Stainless Steel

ABSTRACT Aim The aim of the study is to investigate the galvanic corrosion potential of metal injection molding (MIM) brackets to that of conventional brackets under similar in vitro conditions with nickel-titanium and copper nickel-titanium archwires. Materials and methods Twenty-five maxillary premolar MIM stainless steel brackets and 25 conventional stainless steel brackets and archwires, 0.16 inch, each 10 mm length, 25 nickeltitanium wires, 25 copper nickel-titanium wires were used. They were divided into four groups which had five samples each. Combination of MIM bracket with copper nickel-titanium wire, MIM bracket with nickel-titanium wire and conventional stainless steel brackets with copper nickel-titanium wire and conventional stainless steel brackets with nickel-titanium wires which later were suspended in 350 ml of 1 M lactic acid solution media. Galvanic corrosion potential of four groups were analyzed under similar in vitro conditions. Precorrosion and postcorrosion elemental composition of MIM and conventional stainless steel bracket by scanning electron microscope (SEM) with energy dispersive spectroscope (EDS) was done. Results MIM bracket showed decreased corrosion susceptibility than conventional bracket with copper nickeltitanium wire. Both MIM and conventional bracket showed similar corrosion resistance potential in association with nickel-titanium archwires. It seems that both brackets are more compatible with copper nickel-titanium archwires regarding the decrease in the consequences of galvanic reaction. The EDS analysis showed that the MIM brackets with copper nickel-titanium wires released less metal ions than conventional bracket with copper nickeltitanium wires. Conclusion MIM brackets showed decreased corrosion susceptibility, copper nickel-titanium archwires are compatible with both the brackets than nickel-titanium archwires. Clinical significance Clinically MIM and conventional brackets behaved more or less similarly in terms of corrosion resistance. In order to decrease the corrosion potential of MIM brackets, more precise manufacturing technique should be improved to get a more smoother surface finish. How to cite this article Varma DPK, Chidambaram S, Reddy KB, Vijay M, Ravindranath D, Prasad MR. Comparison of Galvanic Corrosion Potential of Metal Injection Molded Brackets to that of Conventional Metal Brackets with Nickel-Titanium and Copper Nickel-Titanium Archwire Combinations. J Contemp Dent Pract 2013;14(3):488-495.

CARPENTER PROJECT 70+ CUSTOM 630

Alloy Digest ◽  
2003 ◽  
Vol 52 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Temperature Treatment ◽  
Single Step ◽  
Steel Type ◽  
Low Temperature Treatment ◽  
Conventional Stainless Steel

Abstract Carpenter Project 70+ Custom 630 is a modified version of conventional stainless steel Type 630 (17Cr-4Ni) with improved machinability. The alloy has good fabrication characteristics and can be age hardened by a single-step, low-temperature treatment. See also Carpenter Custom 630, Alloy Digest SS-258, revised December 2000, and Carpenter Project 70 Stainless Custom 630, Alloy Digest SS-732, November 1998. This datasheet provides information on composition and physical properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SS-886. Producer or source: Carpenter Specialty Alloys.

CROWN DOWN PREPARATION TECHNIQUE WITH LARGE TAPER ENDODONTIC HAND INSTRUMENT

2021 ◽  
Vol 17 (1) ◽  
pp. 41-48
Author(s):  
Asri Riany Putri ◽  
Keyword(s):  
Stainless Steel ◽  
Root Canal ◽  
Working Time ◽  
Root Canal Treatment ◽  
Preparation Technique ◽  
Root Canal Preparation ◽  
Periapical Lesions ◽  
Root Canals ◽  
Root Canal System ◽  
Conventional Stainless Steel

Introduction: Root canal preparation is an important step in root canal treatment. The use of stainless steel K-Files is time-consuming and causes fatigue to patients and operators. The large taper endodontic hand instrument can be used as an option for another preparation instrument. The purpose of this article is to determine the advantages of using large taper endodontic hand instruments as a preparation instrument compared to conventional stainless steel K-Files. Case: The 24-year-old male patient presented with pain in his lower left tooth even though it was not used. Examination of teeth 35, percussion and press (+), palpation (-), CE (-), exploration of root canals with smooth broach (+). There was a radiolucent image in the distal crown that had reached the pulp chamber, radiolucency with a blurred border of 2 mm in diameter at the periapical area, and the dilation of the periodontal ligaments along with the roots. Tooth 35 diagnosis was partial pulp necrosis with periapical lesions. Case Management: Root canal treatment of teeth 35 using hand-used ProTaper with the crown down technique up to F4 WL = 21 mm. Obturation with single cone technique with Endomethasone as a sealer. Discussion: The large taper instrument is very flexible and easily enters narrow and bent root canals, thus it can shorten the working time, reduce the risk of fatigue for patients and operators, improves the cleaning of the root canal system, and consistent root canal formation. The crown down technique used can reduce the risk of preparation errors, prevent debris extrusion and improve obturation quality. Conclusion: Root canal preparation using a large taper endodontic hand instrument can shorten the working time and reduce the risk of fatigue for patients and operators compared to preparations using conventional stainless steel K-File.

Nickel and Cobalt Hypersensitive Reaction Before and After Orthodontic Therapy in Children

2004 ◽  
Vol 5 (4) ◽  
pp. 79-90 ◽  
Author(s):  
Aynur Medine Şahin Saǧlam ◽  
Vahide Baysal ◽  
A. Murat Ceylan
Keyword(s):  
Stainless Steel ◽  
Hypersensitivity Reaction ◽  
Orthodontic Treatment ◽  
Total Sample ◽  
Hypersensitive Reaction ◽  
Nickel Allergy ◽  
Cross Sectional ◽  
Orthodontic Therapy ◽  
Before And After ◽  
Conventional Stainless Steel

Abstract Nickel and cobalt are major components of alloys used in orthodontics. The objectives of this cross-sectional study was to determine the prevalence of a nickel hypersensitivity reaction before and after orthodontic treatment with conventional stainless steel brackets and wires. The total sample consisted of 82 patients (55 females, and 27 males) from the Orthodontic Department at the Faculty of Dentistry, Süleyman Demirel University. A patch test and a questionnaire were used to evaluate hypersensitivity to these metals. The statistical analysis was carried out using Fisher's exact X2 (2 x 2) test. The prevalence of nickel allergy was found to be higher in females than males (14.55% in females, 0% in males), and the prevalence of cobalt allergy was found to be 9.76% (7.27% in females, 14.81% in males). Orthodontic treatment with conventional stainless steel alloys does not appear to have an allergenic effect on the gingival and oral health of the patient. A family history of an allergy to these metals or the use of metallic objects in contact with the skin do not characterize nickel and cobalt hypersensitivity. This suggests orthodontic therapy with conventional stainless steel appliances does not initiate or aggravate a nickel hypersensitivity reaction. There was no association between the before treatment and after treatment to a nickel and cobalt hypersensitivity reaction. Citation Saglam AMS, Baysal V, Ceylan AM. Nickel and Cobalt Hypersensitive Reaction Before and After Orthodontic Therapy in Children. J Contemp Dent Pract 2004 November;(5)4:079-090.

scholarly journals Development of Braided Carbon/Peek Composite Bone Plates

2001 ◽  
Vol 10 (1) ◽  
pp. 096369350101000 ◽  
Author(s):  
K. Fujihara ◽  
Zheng-Ming Huang ◽  
S. Ramakrishna ◽  
K. Satkunanantham ◽  
H. Hamada
Keyword(s):  
Stainless Steel ◽  
Bending Moment ◽  
Composite Plates ◽  
Bone Plates ◽  
Bending Tests ◽  
Braided Composite ◽  
Four Point Bending ◽  
Peek Composite ◽  
Conventional Stainless Steel ◽  
Composite Bone

In this study, a novel fabrication method using braiding technique was applied to fabricate carbon/PEEK composite bone plates. Four-point bending tests of the composite plates were carried out to compare with the conventional stainless-steel bone plate. The braided composite bone plates with considered braiding angles displayed a maximum bending moment in the range of 38.2 ∼ 44.0 % and bending stiffness in the range of 26.6 ∼ 30.2 % of those of a stainless-steel plate. The bending properties of braided composite plates are comparable with those of the polymer composite bone plates reported in the literature. The potential of braided carbon/PEEK composite material for bone fracture fixation applications is indicated.

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