An Investigation into the Load Transfer in Interlocking Intramedullary Nails during Simulated Healing of a Femoral Fracture

1994 ◽  
Vol 208 (1) ◽  
pp. 19-26 ◽  
Author(s):  
A W Miles ◽  
R J Eveleigh ◽  
B J Wight ◽  
M I Goodwin
Keyword(s):  
Intramedullary Nailing ◽  
Bone Healing ◽  
Femoral Fracture ◽  
Load Transfer ◽  
Load Sharing ◽  
Composite Model ◽  
Long Bones ◽  
Intramedullary Nails ◽  
Different Types ◽  
Healing Model

Interlocked intramedullary nailing is widely used for the fixation of fractures in long bones. This study investigated the biomechanical aspects of load sharing between the implant and bone for two different types of nails—a fully slotted AO/ASIF nail and a non-slotted Russell-Taylor nail—in a simulated bone healing model using composite model femora. The results demonstrated the different load-sharing characteristics of the two nail types in torsion but similar behaviour in bending. The techniques applied provided a useful basis on which to evaluate these types of implants.

scholarly journals Randomized Controlled Trial of the Clinical Recovery and Biodegradation of Polylactide-co-glycolide Implants Used in the Intramedullary Nailing of Children’s Forearm Shaft Fractures with at Least Four Years of Follow-Up

2021 ◽  
Vol 10 (5) ◽  
pp. 995
Author(s):  
Marja Perhomaa ◽  
Tytti Pokka ◽  
Linda Korhonen ◽  
Antti Kyrö ◽  
Jaakko Niinimäki ◽  
...  
Keyword(s):  
Intramedullary Nailing ◽  
Controlled Trial ◽  
Long Term Outcomes ◽  
Intramedullary Nails ◽  
Metal Implants ◽  
Shaft Fractures ◽  
Fractures In Children ◽  
Significant Difference

The preferred surgical fixation of forearm shaft fractures in children is Elastic Stable Intramedullary Nailing (ESIN). Due to known disadvantageous effects of metal implants, a new surgical method using biodegradable polylactide-co-glycolide (PLGA) intramedullary nails has been developed but its long-term outcomes are unclear. The aim of this study was to compare the long-term outcomes of Biodegradable Intramedullary Nailing (BIN) to ESIN and assess the biodegradation of the study implants via magnetic resonance imaging (MRI). The study population of the prospective, randomized trial consisted of paediatric patients whose forearm shaft fractures were treated with BIN (n = 19) or ESIN (n = 16). Forearm rotation at minimally four years’ follow-up was the main outcome. There was no clinically significant difference in the recovery of the patients treated with the BIN as compared to those treated with the ESIN. More than half of the implants (57.7%, n = 15/26) were completely degraded, and the rest were degraded almost completely. The PLGA intramedullary nails used in the treatment of forearm shaft fractures in this study resulted in good function and anatomy. No unexpected disadvantages were found in the degradation of the implants. However, two implant failures had occurred in three months postoperatively.

Mandibular Implant-Supported Overdenture: An In Vitro Comparison of Ball, Bar, and Magnetic Attachments

2013 ◽  
Vol 39 (3) ◽  
pp. 302-307 ◽  
Author(s):  
V. Manju ◽  
T. Sreelal
Keyword(s):  
Stress Distribution ◽  
Strain Gauge ◽  
Load Transfer ◽  
Implant Surface ◽  
Transfer Characteristics ◽  
Ball Bar ◽  
Different Types ◽  
Dial Gauge ◽  
In Vitro Comparison

In an implant-supported overdenture, the optimal stress distribution on the implants and least denture displacement is desirable. This study compares the load transfer characteristics to the implant and the movement of overdenture among 3 different types of attachments (ball-ring, bar-clip, and magnetic). Stress on the implant surface was measured using the strain-gauge technique and denture displacement by dial gauge. The ball/O-ring produces the optimal stress on the implant body and promotes denture stability.

scholarly journals Concrete Modular Pavements – Types, Issues And Challenges

2019 ◽  
Vol 14 (1) ◽  
pp. 80-103 ◽  
Author(s):  
Audrius Vaitkus ◽  
Judita Gražulytė ◽  
Rita Kleizienė ◽  
Viktoras Vorobjovas ◽  
Ovidijus Šernas
Keyword(s):  
Traffic Congestion ◽  
Road Network ◽  
Load Transfer ◽  
Precast Concrete ◽  
Concrete Slabs ◽  
Time Saving ◽  
Urban Streets ◽  
The Road ◽  
Different Types ◽  
Pavement Construction

According to the European Asphalt Pavement Association, more than 90 per cent of the European road network is paved with asphalt. Constantly increasing traffic volume and climate change accelerate deterioration of current pavements. As a result, there arises a need to rehabilitate them prematurely. Repair and rehabilitation work lead to traffic congestion, which is one of the most significant concerns in highly trafficked roads and urban streets. Concrete modular pavements consisting of precast concrete slabs are a reasonable solution to deal with the road works since their construction, as well as repair, is time-saving. Repair works typically are implemented during a low traffic period (usually at night). A primary purpose of concrete modular pavements is heavily trafficked roads and other transport areas. This paper focuses on concrete modular pavements, their types, issues and challenges related to their design, slab fabrication and pavement construction. The conducted analysis revealed 15 different types of concrete modular pavements that differ from the techniques of slab joints and load transfer between the adjacent slabs. More than 20 issues and challenges related to the design of modular elements, slab fabrication and pavement construction were identified. Finally, the existing practice of concrete modular pavements was summarised and the gaps of scientific knowledge, as well as a need for comprehensive research, were defined.

scholarly journals Are Cephalomedullary Nail Guides Accurate? A Case Report of an Unexpected Complication After Nailing an Intertrochanteric Femoral Fracture

2018 ◽  
Vol 9 ◽  
pp. 215145851875779
Author(s):  
Rayan Fairag ◽  
Fahad H. Abduljabbar ◽  
Alex Page ◽  
Ron Dimentberg
Keyword(s):  
Case Report ◽  
Carbon Fiber ◽  
Intramedullary Nailing ◽  
Hip Fractures ◽  
Femoral Fracture ◽  
Intraoperative Imaging ◽  
Unusual Complication ◽  
Cephalomedullary Nail ◽  
Lag Screw ◽  
Intertrochanteric Femoral Fracture

Intramedullary nailing is the mainstay of treatment for unstable intertrochanteric hip fractures. Various complications have been described with the use of these nails. We report an unusual complication whereby the lag screw completely missed the nail. We hypothesize that this previously unreported complication may be related to a specific flexible carbon fiber aiming device. Surgeon awareness and thorough intraoperative imaging are crucial to avoiding this complication.

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