scholarly journals Knots Tied With High–Tensile Strength Tape Biomechanically Outperform Knots Tied With Round Suture

2021 ◽  
Vol 9 (10) ◽  
pp. 232596712110395
Author(s):  
Chih-Kai Hong ◽  
Hao-Chun Chuang ◽  
Kai-Lan Hsu ◽  
Fa-Chuan Kuan ◽  
Yueh Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Failure Load ◽  
High Strength ◽  
Biomechanical Properties ◽  
Materials Testing ◽  
Clinical Failure ◽  
High Tensile Strength ◽  
Yield Load ◽  
Failure Loads ◽  
Knot Security

Background: Tape-type suture material is well-accepted in arthroscopy surgery. Purpose: To compare the knot security of a high–tensile strength round suture and high–tensile strength tape with commonly used arthroscopic knots. Study Design: Controlled laboratory study. Methods: We compared the performance of No. 2 braided nonabsorbable high-strength suture with that of 1.3-mm braided nonabsorbable high-strength tape. Five commonly used arthroscopic knots were investigated: the Roeder knot; the Western knot; the Samsung Medical Center (SMC) knot; the Tennessee knot; and a static surgeon’s knot. Seven knots were tied for each combination of knots and suture types. Knots were tied on a 30-mm circumferential metal post, and the suture loops were transferred to a materials testing machine. After preloading to 5 N, all specimens were loaded to failure. The clinical failure load, defined as the maximal force to failure at 3 mm of crosshead displacement, yield load, and stiffness, were recorded. A 2-way analysis of variance was used to determine differences between the groups. Results: Both suture type and knot type significantly affected the clinical failure load, yield load, and stiffness ( P = .002). The high-strength tape resulted in a significantly greater clinical failure load than the high-strength suture in the case of the Roeder knot, Western knot, and SMC knot ( P = .027, .005, and .016, respectively). When the high-strength round suture was used, the Roeder knot, Western knot, and SMC knot resulted in significantly smaller clinical failure loads compared with the Tennessee knot ( P = .011, .003, and .035, respectively) and the static surgeon’s knot ( P < .001 for all). When the high-strength tape was used, the Roeder knot, Western knot, and SMC knot resulted in significantly smaller clinical failure loads compared with the static surgeon’s knot ( P = .001, .001, and .003, respectively). Conclusion: The results of this study indicated that arthroscopic knots tied using 1.3-mm high-strength tape biomechanically outperformed knots tied using a No. 2 high-strength suture. While the static surgeon’s knot exhibited the best biomechanical properties, the Tennessee knot resulted in generally better biomechanical properties among the arthroscopic sliding knots. Clinical Relevance: Elongation and loosening of tied knots possibly affects the clinical results of repaired constructs.

scholarly journals Comparing the Influence of Different Overhand/Underhand Stacking Combinations of Reversing Half-Hitches on Alternating Posts on Arthroscopic Knot Security

2019 ◽  
Vol 12 (4) ◽  
pp. 97-102
Author(s):  
Tyler T. Bilden ◽  
Heather A. Evin ◽  
Benjamin C. Noonan ◽  
Alexander C.M. Chong
Keyword(s):  
Failure Load ◽  
Suture Material ◽  
Clinical Failure ◽  
Suture Materials ◽  
Orthopedic Surgeons ◽  
Mode Of Failure ◽  
Load To Failure ◽  
Arthroscopic Knot ◽  
Failure Loads ◽  
Knot Security

Introduction Previous literature demonstrated the importanceof stacking at least three reversing half-hitches on alternating posts(RHAPs) following arthroscopic knot placement. However, RHAPsconstruction involves looping the suture in either an “overhand” or an“underhand” manner as it relates to the post, which may affect knotsecurity. This study investigated the presently unidentified influenceof different stacking combinations of three RHAPs and suture materialon arthroscopic knot security. Methods Four different RHAPs stacking combinations were tiedwith three different suture materials. Ten knots of each configurationwere tied using each suture material, resulting in 120 evaluated knots.A single load-to-failure test was performed. The mode of failure andmean ultimate clinical failure load were recorded. Results Different overhand/underhand stacking combinations ofthree RHAPs had a statistically significant effect on arthroscopicknot strength and security; however, all combinations surpassed theminimum ultimate clinical failure threshold. Knots constructed witheither Force Fiber® or braided fishing line had mean ultimate clinicalfailure loads of greater than 200 N and most commonly failed due tosuture material breakage (100%, 60 - 80% respectively). Conversely,FiberWire® demonstrated lower mean ultimate clinical failure loadsand had a higher incidence of elongated but intact failure (60 - 90%). Conclusion Different overhand/underhand stacking combinationsof three RHAPs yielded an arthroscopic knot capable of secure tissuefixation. A significant effect was observed for suture materials on theknot strength. This study increases our understanding of suitableRHAPs construction following arthroscopic knot placement that canlead to improving the ultimate clinical failure loads of constructedarthroscopic knots observed between orthopedic surgeons.

scholarly journals Does using high-tensile strength tape improve the fixation strength in tendon graft fixation with needleless suture wrapping techniques compared to a suture?

2020 ◽  
Vol 28 (3) ◽  
pp. 230949902097186
Author(s):  
Chih-Kai Hong ◽  
Fa-Chuan Kuan ◽  
Kai-Lan Hsu ◽  
Yueh Chen ◽  
Hao-Chun Chuang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cyclic Loading ◽  
High Strength ◽  
Biomechanical Properties ◽  
Tendon Graft ◽  
Graft Fixation ◽  
Fixation Strength ◽  
High Tensile Strength ◽  
Suture Materials ◽  
Load To Failure

Purpose: To compare the biomechanical properties of a high-tensile strength suture and high-tensile strength tape in tendon graft fixation using two needleless suture wrapping techniques, the modified Prusik knot and modified rolling hitch. Methods: Two needleless suture wrapping techniques, the modified rolling hitch (MR) and modified Prusik knot (MP), were utilized. Meanwhile, two kinds of suture materials, a No. 2 braided nonabsorbable high-strength suture (S) and a 1.3 mm high-tensile strength tape (T), were used. A total of 40 porcine tendons were used, which were randomly divided into four groups. Each group was assigned to one of the following groups: MRS, MRT, MPS, and MPT. Each specimen was pretensioned to 100 N for three cycles, cyclically loaded from 50 to 200 N for 200 cycles, and finally loaded to failure. Results: The MRT group (34.1 ± 3.5%) had a significantly higher value compared with the MRS (29.7 ± 2.3%), MPS (27.1 ± 3.6%) and MPT (29.5 ± 4.0%) groups in term of elongation after cyclic loadings ( p = 0.002). In terms of ultimate failure load, there were no significant differences in the MRS (401 ± 27 N), MRT (380 ± 27 N), MPS (398 ± 44 N) and MPT (406 ± 49 N) values ( p = 0.539). All specimens failed due to suture breakage at the knots. Conclusion: Compared with the high-tensile strength suture, using the high-tensile strength tape lead to greater elongation after cyclic loading when the modified rolling hitch was used. No differences in terms of elongation after cyclic loading and load to failure were found between the high-tensile strength suture and tape using the modified Prusik knot.

The Development of Annealing Time for Super Fine Grain and High Strength IF Steel

2013 ◽  
Vol 631-632 ◽  
pp. 613-616 ◽  
Author(s):  
Hong Mei Zhang ◽  
Li Feng Qiao
Keyword(s):  
Tensile Strength ◽  
High Strength ◽  
Strain Ratio ◽  
Continuous Annealing ◽  
High Tensile Strength ◽  
Plastic Strain Ratio ◽  
Fine Grain ◽  
New Type ◽  
High Strength If Steel ◽  
Annealing Experiments

The hot rolling, cold rolling and simulative continuous annealing experiments were carried out in the laboratory on the base of new type SFG HSS (super fine grain, high strength steel sheet). The results show that the microstructure which contains a number of cake shaped grain can be refined and homogenized by the feasible annealing holding time. Contrast to the conventional steel, the SFG steel have the characters of super fine grain, high tensile strength, low yield strength/tensile strength rate, good elongation and high r-value high（the plastic strain ratio）．

Production and Use of the Textile Reinforced Concrete

2014 ◽  
Vol 982 ◽  
pp. 59-62 ◽  
Author(s):  
Filip Vogel
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Reinforced Concrete ◽  
High Strength ◽  
Cement Matrix ◽  
High Tensile Strength ◽  
Textile Reinforced Concrete ◽  
Corrosion Resistant ◽  
New Material ◽  
Ductile Behavior

This article discusses about the textile reinforced concrete. The textile reinforced concrete is a new material with great possibilities for modern construction. The textile reinforced concrete consists of cement matrix and textile reinforcement of high strength fibers. This combination of cement matrix and textile reinforcement is an innovative combination of materials for use in the construction. The main advantage of the textile reinforced concrete is a high tensile strength and ductile behavior. The textile reinforced concrete is corrosion resistant. With these mechanical properties can be used textile reinforced concrete in modern construction.

Optimisation of V/N Ratios and Stelmor Cooling for Electric Arc Furnace Steels Used in Galvanised High Tensile Strength Wire Applications

2005 ◽  
Vol 500-501 ◽  
pp. 745-752
Author(s):  
Andrew Wallace ◽  
Allan Brownrigg ◽  
Peter D. Hodgson ◽  
Leo Frawley ◽  
Warwick Heath
Keyword(s):  
Tensile Strength ◽  
High Strength Steels ◽  
High Strength ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Vanadium Nitride ◽  
Arc Furnace ◽  
High Tensile Strength ◽  
Major Factors ◽  
High Level

The high level of residual nitrogen in Electric Arc Furnace (EAF) steels is one of the major factors influencing the performance of the finished product. For high tensile strength galvanised wire applications, nitrogen in interstitial solid solution can severely limit drawability and formability. This problem can be controlled simply and effectively by adding nitride-forming elements to the molten steel so that the nitrogen is removed from solution. Vanadium additions are especially beneficial in high strength steels because the removal of nitrogen as vanadium-nitride can cause extensive precipitation strengthening. This investigation concerns commercial grade steels microalloyed with vanadium and rolled to 5.5mm rod, under controlled Stelmor cooling conditions. This rod is used to produce 2.5mm high tensile strength galvanised wire. The aim of the research was to determine the optimum vanadium/nitrogen (V/N) ratio and Stelmor cooling profile for the vanadium steel rod. This was achieved by extensive production and laboratory trials followed by mechanical and microstructural analyses of the product.

scholarly journals Modulation of Multiple Precipitates for High Strength and Ductility in Al-Cu-Mn Alloy

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7383
Author(s):  
Linxiang Liu ◽  
Zhijun Wang ◽  
Qingfeng Wu ◽  
Zhongsheng Yang ◽  
Kexuan Zhou ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
High Strength ◽  
Mechanical Behaviors ◽  
High Tensile Strength ◽  
Transmission Electron ◽  
Evolution Pattern ◽  
Elongation To Failure ◽  
High Elongation ◽  
Strength And Ductility

The category and morphology of precipitates are essential factors in determining the mechanical behaviors of aluminum alloys. It is a great challenge to synthetically modulate multiple precipitates to simultaneously improve strength and ductility. In the present work, by optimizing the precipitations of the GP zone, θ’-approximant and θ’ phase for an Al-Cu-Mn alloy, a high tensile strength of 585 MPa with large elongation of 12.35% was achieved through pre-deformation and aging. The microstructure evolution pattern was revealed by detailed characterizations of scanning electron microscopy and transmission electron microscopy. It was found that such high tensile strength of the samples was due to a combination of strengthening by the high density of dispersive fine precipitates and dislocations, and the high elongation to failure was primarily attributed to the multimodal precipitates and elimination of precipitation-free zones along the grain boundaries. The strategy proposed here is a promising way of preparing ultra-strong Al-Cu-Mn alloys.

scholarly journals Welding of DOCOL 1200M using micro-jet cooling

2020 ◽  
Vol 92 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Abilio Silva ◽  
Bożena Szczucka-Lasota ◽  
Tomasz Węgrzyn ◽  
Adam Jurek
Keyword(s):  
Tensile Strength ◽  
Welded Joint ◽  
High Strength ◽  
High Tensile Strength ◽  
Lower Strength ◽  
Plastic Properties ◽  
Supporting Structure ◽  
Jet Cooling

In welding elements of the supporting structure of the means of transport, attention is paid to the high strength and good plastic properties of the welded joint. In the construction of transport means, DOCOL 1200M  steel from the AHSS group is increasingly used due to their high tensile strength of steel at the level of 1200 MPa. The welds have much lower strength than the native material. In this paper, it was decided to check the weldability of  DOCOL 1200M steel with the use of micro-jet cooling

scholarly journals The Biomechanical Properties of a High-Tensile Strength Tape for Tendon Graft Fixation Using the Krackow Configuration

2020 ◽  
Vol 2 (4) ◽  
pp. e347-e351 ◽  
Author(s):  
Chih-Kai Hong ◽  
Kai-Lan Hsu ◽  
Fa-Chuan Kuan ◽  
Yueh Chen ◽  
Chen-Hao Chiang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Biomechanical Properties ◽  
Tendon Graft ◽  
Graft Fixation ◽  
High Tensile Strength

An in vitro comparison of a 2.7/3.5 mm hybrid plate alone and combined with crossed K-wires for canine pancarpal arthrodesis

2008 ◽  
Vol 21 (04) ◽  
pp. 307-311 ◽  
Author(s):  
R. Bailey ◽  
A. Shields ◽  
D. Bennett ◽  
J. L. Arnott
Keyword(s):  
Ultimate Load ◽  
Failure Load ◽  
Average Weight ◽  
Yield Load ◽  
Mode Of Failure ◽  
Failure Loads ◽  
K Wires ◽  
Hybrid Plate ◽  
Dorsal Plating

SummarySeveral techniques have been described for canine pancarpal arthrodesis (PCA) with dorsal plating becoming the most accepted method for ease of placement despite the proposed biomechanical disadvantages. The aim of this study was to compare the biomechanical effects of the addition of crossed K-wires to a standard 2.7/3.5 mm hybrid PCA plate. A 2.7/3.5 mm hybrid PCA plate, alone and combined with crossed K-wires were tested. Six pairs of cadaver forelimbs were collected from medium-sized dogs with an average weight of 24 kg by elbow disarticulation. The limbs were potted and fixed in an Instron load cell (Instron, High Wycombe, UK) and axially loaded to failure. Load displacement data and mode of failure were recorded and stiffness, yield load and ultimate load at failure were calculated. The yield load (kN) of the plate and K-wire construct (1.278 ± 0.11) was significantly higher than for the plate construct alone (1.002 ± 0.07) (p = 0.00056). However, the differences between the two constructs in stiffness and failure loads were not significant

Reduction of Springback in Hat Channel with High-Strength Steel Sheetby Stroke Returning Deep Drawing

2013 ◽  
Vol 554-557 ◽  
pp. 1320-1330 ◽  
Author(s):  
Taro Geka ◽  
Masayuki Asakura ◽  
Takuma Kiso ◽  
Takashi Sugiyama ◽  
Masato Takamura ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Deep Drawing ◽  
High Strength Steel ◽  
High Strength ◽  
New Method ◽  
Dual Phase ◽  
High Tensile Strength ◽  
Blank Holder ◽  
Steel Sheets

This study investigated the twisting phenomenon in curved hat channel products made of dual-phase 980-MPa-class high-tensile-strength steel sheets. The stroke returning deep drawing (SRDD) method was proposed to deal with twisting. In this new method, after the punch reaches the bottom dead point, it returns to a certain drawing height without the blank holder being removed. With the application of the SRDD method, twisting hardly occurred, but sidewall curl increased. A two-step SRDD was then proposed to reduce the sidewall curl of SRDD products. In the two-step SRDD method, a stroke returning process is carried out in two steps under different conditions. The results showed that the two-step SRDD method reduced the sidewall curl and twist simultaneously.

Sign in / Sign up

Export Citation Format

Share Document