scholarly journals Evaluation of Light-Activated Provisional Resin Materials for Periodontal Soft Tissue Management

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Soo-Kyung Jun ◽  
Hae-Hyoung Lee ◽  
Jung-Hwan Lee
Keyword(s):  
Mechanical Properties ◽  
Soft Tissue ◽  
Adverse Effects ◽  
Compressive Modulus ◽  
Gingival Fibroblasts ◽  
Oral Keratinocytes ◽  
Compressive Test ◽  
Soft Tissue Management ◽  
Disk Specimen ◽  
Oral Cells

The purpose of this study was to determine mechanical properties using a compressive test with cylinder specimen (h=6 mm andϕ=4 mm) as well as cytotoxicity using elutes from disk specimen (ϕ=10 mm andh=2 mm) against human gingival fibroblasts and oral keratinocytes with light-activated provisional resin materials (Revotek LC and Luxatemp Solar) compared to chemically activated counterpart (Snap, Trim II, and Jet). Significantly increased compressive strength (210~280 MPa) was detected in light-activated products compared to chemically activated ones (20~65 MPa,P<0.05) and similar compressive modulus was detected in both types (0.8~1.5 and 0.5~1.3 GPa). Simultaneously, the light-activated products showed less adverse effects on the periodontal soft tissue cells in any polymerization stage compared to the chemically activated products. Particularly, chemically activated products had significantly greater adverse effects during the “polymerizing” phase compared to those that were “already set” (P<0.05), as shown in confocal microscopic images of live and dead cells. In conclusion, light-activated provisional resin materials have better mechanical properties as well as biocompatibility against two tested types of oral cells compared to the chemically activated counterpart, which are considered as more beneficial choice for periodontal soft tissue management.

scholarly journals Association Between Pain in Knee Osteoarthritis and Mechanical Properties of Soft Tissue Around Knee Joint

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 14599-14607
Author(s):  
Jianan Wu ◽  
Zhihui Qian ◽  
Ruixia Xu ◽  
Jing Liu ◽  
Luquan Ren ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Soft Tissue ◽  
Knee Joint ◽  
Knee Osteoarthritis

scholarly journals Concomitant control of mechanical properties and degradation in resorbable elastomer-like materials using stereochemistry and stoichiometry for soft tissue engineering

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mary Beth Wandel ◽  
Craig A. Bell ◽  
Jiayi Yu ◽  
Maria C. Arno ◽  
Nathan Z. Dreger ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Drug Delivery ◽  
Soft Tissue ◽  
Tissue Regeneration ◽  
Biological Tissues ◽  
Soft Tissue Regeneration ◽  
Soft Tissue Engineering ◽  
Degradation Properties ◽  
Enhance Cell Adhesion

AbstractComplex biological tissues are highly viscoelastic and dynamic. Efforts to repair or replace cartilage, tendon, muscle, and vasculature using materials that facilitate repair and regeneration have been ongoing for decades. However, materials that possess the mechanical, chemical, and resorption characteristics necessary to recapitulate these tissues have been difficult to mimic using synthetic resorbable biomaterials. Herein, we report a series of resorbable elastomer-like materials that are compositionally identical and possess varying ratios of cis:trans double bonds in the backbone. These features afford concomitant control over the mechanical and surface eroding degradation properties of these materials. We show the materials can be functionalized post-polymerization with bioactive species and enhance cell adhesion. Furthermore, an in vivo rat model demonstrates that degradation and resorption are dependent on succinate stoichiometry in the elastomers and the results show limited inflammation highlighting their potential for use in soft tissue regeneration and drug delivery.

scholarly journals Fabrication of Polycaprolactone/Nano Hydroxyapatite (PCL/nHA) 3D Scaffold with Enhanced In Vitro Cell Response via Design for Additive Manufacturing (DfAM)

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1394
Author(s):  
Yong Sang Cho ◽  
So-Jung Gwak ◽  
Young-Sam Cho
Keyword(s):  
Mechanical Properties ◽  
Cell Response ◽  
Structural Characteristics ◽  
Structure Design ◽  
Compressive Modulus ◽  
Control Group ◽  
Design For Additive Manufacturing ◽  
3D Scaffold ◽  
3D Printed

In this study, we investigated the dual-pore kagome-structure design of a 3D-printed scaffold with enhanced in vitro cell response and compared the mechanical properties with 3D-printed scaffolds with conventional or offset patterns. The compressive modulus of the 3D-printed scaffold with the proposed design was found to resemble that of the 3D-printed scaffold with a conventional pattern at similar pore sizes despite higher porosity. Furthermore, the compressive modulus of the proposed scaffold surpassed that of the 3D-printed scaffold with conventional and offset patterns at similar porosities owing to the structural characteristics of the kagome structure. Regarding the in vitro cell response, cell adhesion, cell growth, and ALP concentration of the proposed scaffold for 14 days was superior to those of the control group scaffolds. Consequently, we found that the mechanical properties and in vitro cell response of the 3D-printed scaffold could be improved by kagome and dual-pore structures through DfAM. Moreover, we revealed that the dual-pore structure is effective for the in vitro cell response compared to the structures possessing conventional and offset patterns.

Effect of Bubble Inclusions on the Mechanical Properties of Cast Poly-Methyl Metacrylate

1972 ◽  
Vol 94 (4) ◽  
pp. 847-852 ◽  
Author(s):  
J. D. Stachiw
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Loading Condition ◽  
Stress Raiser ◽  
Compressive Yield Strength ◽  
Compressive Test ◽  
Acrylic Plastic ◽  
Methyl Metacrylate ◽  
As Stress ◽  
Stress Raisers

Bubble inclusions present in cast acrylic plastic generally degrade the mechanical properties of the material. To evaluate the effect of bubbles on the mechanical strength of acrylic plastic, 120 tensile and compressive test specimens were machined from massive acrylic castings with bubble inclusions. The specimens were tested under uniaxial loading condition and effect of bubbles on tensile and compressive strength noted. The stress raiser effect of bubbles caused the tensile specimens to fail at stresses 7 to 30 percent lower than observed in specimens without bubbles. The compressive yield strength was not affected by bubbles. However, here the bubbles served as stress raisers also and caused cracks to initiate at the bubble surfaces when the yield strength of acrylic plastic was reached.

Influence of CAD/CAM zirconia for implant-abutment manufacturing on gingival fibroblasts and oral keratinocytes

2015 ◽  
Vol 20 (5) ◽  
pp. 1101-1108 ◽  
Author(s):  
A. M. Pabst ◽  
C. Walter ◽  
A. Bell ◽  
M. Weyhrauch ◽  
I. Schmidtmann ◽  
...  
Keyword(s):  
Gingival Fibroblasts ◽  
Oral Keratinocytes ◽  
Implant Abutment ◽  
Cad Cam

Advanced Navigation Planning Including Soft Tissue Management

Orthopedics ◽  
2005 ◽  
Vol 28 (10) ◽  
Author(s):  
Ulrich Clemens ◽  
Rolf Klaus Miehlke
Keyword(s):  
Soft Tissue ◽  
Soft Tissue Management ◽  
Navigation Planning

scholarly journals Soft tissue management of children's open tibial fractures – a review of seventy children over twenty years

2010 ◽  
Vol 92 (4) ◽  
pp. 320-325 ◽  
Author(s):  
P Rao ◽  
MV Schaverien ◽  
KJ Stewart
Keyword(s):  
Soft Tissue ◽  
Tibial Fractures ◽  
Soft Tissue Management ◽  
Retrospective Case ◽  
Open Tibial Fractures ◽  
Fractures In Children ◽  
Superficial Wound ◽  
Patient Stay ◽  
Grade Ii ◽  
Distally Based

INTRODUCTION The management of open tibial fractures in children represents a unique reconstructive challenge. The aim of the study was to evaluate the management of paediatric open tibial fractures with particular regard to soft tissue management. PATIENTS AND METHODS A retrospective case-note analysis was performed for all children presenting with an open tibial fracture at a single institution over a 20-year period for 1985 to 2005. RESULTS Seventy children were reviewed of whom 41 were males and 29 females. Overall, 91% (n = 64) of children suffered their injury as a result of a vehicle-related injury. The severity of the fracture with respect to the Gustilo classification was: Grade I, 42% (n = 29); Grade II, 24% (n = 17); Grade III, 34% (n = 24; 7 Grade 3a, 16 Grade 3b, 1 Grade 3c). The majority of children were treated with external fixation and conservative measures, with a mean hospital in-patient stay of 13.3 days. Soft tissue cover was provided by plastic surgeons in 31% of all cases. Four cases of superficial wound infection occurred (6%), one case of osteomyelitis and one case of flap failure. The limb salvage was greater than 98%. CONCLUSIONS In this series, complications were associated with delayed involvement of plastic surgeons. Retrospective analysis has shown a decreased incidence of open tibial fractures which is reported in similar studies. Gustilo grade was found to correlate with length of hospital admission and plastic surgery intervention. We advocate, when feasible, the use of local fas-ciocutaneous flaps (such as distally based fasciocutaneous and adipofascial flaps), which showed a low complication rate in children.

scholarly journals The Ortho-Plastic Approach to Soft Tissue Management in Trauma

2014 ◽  
Vol 8 (1) ◽  
pp. 399-408 ◽  
Author(s):  
Daniel J Jordan ◽  
Marco Malahias ◽  
Wasim Khan ◽  
Sandip Hindocha
Keyword(s):  
Emergency Department ◽  
Soft Tissue ◽  
Soft Tissue Injuries ◽  
British Association ◽  
Current Evidence ◽  
Soft Tissue Management ◽  
Initial Management ◽  
Accident And Emergency ◽  
Accident And Emergency Department ◽  
British Orthopaedic Association

Fractures with associated soft tissue injuries, or those termed ‘open,’ are not uncommon. There has been much discussion regarding there management, with the guidance from the combined British Orthopaedic Association and British Association and Aesthetic Surgeons teams widely accepted as the gold level of therapy. We aim to discuss the current evidence about the initial management of this group of injuries, taking a journey from arrival in the accident and emergency department through to the point of definitive closure. Other modes of therapy are also reviewed.

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