An Engineering Evaluation of the Oxford External Fixator with Sliding Clamps: Fixator Stiffness and Fracture Healing Assessment

1985 ◽  
Vol 14 (1) ◽  
pp. 21-29 ◽  
Author(s):  
A E Churches ◽  
K E Tanner ◽  
J D Harris
Keyword(s):  
Fracture Healing ◽  
External Fixator ◽  
Sliding Clamps ◽  
Healing Assessment

scholarly journals Fracture Healing Assessment Based on Impact Testing: In Vitro Simulation and Monitoring of the Healing Process of a Tibial Fracture with External Fixator

2017 ◽  
Vol 09 (07) ◽  
pp. 1750098 ◽  
Author(s):  
Francesca Di Puccio ◽  
Lorenza Mattei ◽  
Antonia Longo ◽  
Stefano Marchetti
Keyword(s):  
Fracture Healing ◽  
Modal Analysis ◽  
External Fixator ◽  
Healing Process ◽  
Experimental Modal Analysis ◽  
Impact Testing ◽  
Resonant Frequencies ◽  
Bone Callus ◽  
Healing Assessment

In clinical practice, bone healing is monitored with X-rays and manipulation. Its assessment is thus subjective, depending on the skills of the operator. Alternative and quantitative approaches have been proposed, generally based on the estimation of bone stiffness, which is known to increase with the healing process. The present study investigates the application of experimental modal analysis to fracture healing assessment focusing on fractures treated with an external fixator. The aim is to ascertain the capability of this approach to detect changes in the bone-callus stiffness as variations in the resonant frequencies despite the presence of the fixator, which might hide the bone response. In vitro tests were performed on a tibia phantom where the healing process was simulated creating three different types of callus surrogates, using glue and resin. The resonant frequencies of the phantom with screwed pins and of the phantom with the complete fixator were estimated. Results confirm an increase in the frequencies as the simulated bone-callus stiffness increases, encouraging the application of experimental modal analysis to fracture healing monitoring. This approach can offer remarkable advantages with respect to the actual standards: being non-invasive and quantitative, it would allow a more frequent healing monitoring.

Clinical feasibility of fracture healing assessment through continuous monitoring of implant load

2020 ◽  
pp. 110188
Author(s):  
Manuela Ernst ◽  
Heiko Baumgartner ◽  
Stefan Döbele ◽  
Dankward Höntzsch ◽  
Tim Pohlemann ◽  
...  
Keyword(s):  
Fracture Healing ◽  
Continuous Monitoring ◽  
Healing Assessment

Factors affecting the fracture healing in treatment of tibial shaft fractures with circular external fixator

Injury ◽  
2009 ◽  
Vol 40 (11) ◽  
pp. 1151-1156 ◽  
Author(s):  
Kadir Bahadır Alemdaroğlu ◽  
Uğur Tiftikçi ◽  
Serkan İltar ◽  
Nevres Hürriyet Aydoğan ◽  
Talip Kara ◽  
...  
Keyword(s):  
Fracture Healing ◽  
External Fixator ◽  
Tibial Shaft ◽  
Factors Affecting ◽  
Shaft Fractures ◽  
Circular External Fixator ◽  
Tibial Shaft Fractures

Fracture Healing Assessment with External Fixation

1985 ◽  
Vol 14 (1) ◽  
pp. 13-20 ◽  
Author(s):  
A E Churches ◽  
K E Tanner ◽  
M Evans ◽  
J Gwillim
Keyword(s):  
Fracture Healing ◽  
External Fixation ◽  
Healing Assessment

The Radio-Radial External Fixator in the Treatment of Fractures of the Distal Radius

1999 ◽  
Vol 24 (5) ◽  
pp. 604-609 ◽  
Author(s):  
T. FISCHER ◽  
P. KOCH ◽  
C. SAAGER ◽  
G. N. KOHUT
Keyword(s):  
Fracture Healing ◽  
Distal Radius ◽  
External Fixator ◽  
Bone Grafting ◽  
Load Transfer ◽  
Daily Life ◽  
Early Mobilization ◽  
Ao Classification ◽  
Fracture Types ◽  
Pin Track

The technique of radio-radial monobloc-fixation with the small AO external fixator device has been applied to 17 consecutive Colles’ fractures. The fracture types were mainly A3 and C2, according to the AO classification. We found this technique to be easy and quick in application and stable in fixation. Direct, precise and atraumatic reduction can be achieved by using the distal pins as joy-sticks. Furthermore, disimpaction of the fracture to regain length is possible without bone grafting. Normal carpal mobility and load transfer is preserved during fracture healing and the injured hand can be used in daily life with certain restrictions. To prevent pin-track infections, early mobilization of the wrist should be avoided. We recommend this technique in the treatment of comminuted AO-type A3 fractures of the distal radius and in certain type C2 cases.

Controlled Cyclic Compression of an Open Tibial Fracture Using an External Fixator Affects Fracture Healing in Mice

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
Jennifer A. Currey ◽  
Megan Mancuso ◽  
Sylvie Kalikoff ◽  
Erin Miller ◽  
Sean Day
Keyword(s):  
Fracture Healing ◽  
Mechanical Stimulation ◽  
External Fixator ◽  
Qualitative Assessment ◽  
Control Group ◽  
External Fixators ◽  
Tibial Osteotomy ◽  
Micro Computed Tomography ◽  
Trabecular Thickness ◽  
Significant Difference

Fractures resulting in impaired healing can be treated with mechanical stimulation via external fixators. To examine the effect of mechanical stimulation on fracture healing, we developed an external fixator for use in a mouse model. A 0.5 mm tibial osteotomy was stabilized with the external fixator in C57BL/6 mice. Osteotomies in the treatment group (nt = 41) were subjected to daily sessions of 150 μm of controlled displacement with the aim to create a more mineralized callus at 21 days compared with the control group (nc = 39). Qualitative assessment of the histology found no notable difference in healing patterns between groups at 7, 12, 17, and 21 days. At 21 days, micro-computed tomography (CT) analysis showed that the control group had a significantly higher bone volume (BV) fraction and trabecular number compared with treatment; however there was no significant difference in the total volume (TV) of the callus or trabecular thickness between groups. In summary, the external fixator was used with a motion application system to apply controlled displacement to a healing fracture; however, this treatment did not result in a more mineralized callus at 21 days.

Conversion from external fixator to intramedullary nail causes a second hit and impairs fracture healing in a severe trauma model

2012 ◽  
Vol 31 (3) ◽  
pp. 465-471 ◽  
Author(s):  
Stefan Recknagel ◽  
Ronny Bindl ◽  
Tim Wehner ◽  
Melanie Göckelmann ◽  
Esther Wehrle ◽  
...  
Keyword(s):  
Fracture Healing ◽  
External Fixator ◽  
Intramedullary Nail ◽  
Severe Trauma ◽  
Second Hit ◽  
Trauma Model

scholarly journals Locally-developed External Fixators as Definitive Treatment of Open Tibia Diaphyseal Fractures: A Clinical Prospective Study Conducted in Ivory Coast

2020 ◽  
Author(s):  
Kouamé Jean-Eric Kouassi ◽  
Jean Régis Akobé ◽  
Aya Adélaïde Natacha Kouassi ◽  
Loïc Founkoué ◽  
Christine Detrembleur ◽  
...  
Keyword(s):  
Fracture Healing ◽  
External Fixator ◽  
Ivory Coast ◽  
Definitive Treatment ◽  
External Fixators ◽  
Negative Consequences ◽  
Clinical Trial Registry ◽  
Septic Complications ◽  
Non Union ◽  
Diaphyseal Fractures

Abstract Background: This study sought to evaluate the effectiveness of locally-developed external fixators (LDEF) as definitive treatment for open tibia diaphyseal fractures (OTDF) in Ivory Coast.Methods: Gustilo I, II and IIIA OTDFs of patients admitted within 24 hours of injury were prospectively included and treated with a locally-developed external fixator. The rates of union, mal-union, septic complications, as well as the functional results were assessed, in addition to the LDEF construct’s integrity. Predictive factors of failure or poor results were assessed.Results: Overall, 40 OTDF patients were admitted within 24 hours of injury. Gustilo I, II and IIIA fractures were observed in three, 13, and 24 patients, respectively. Uneventful fracture healing was obtained in 29 cases, with an average union time of 8.47 months. Mal-union and non-union were registered in three and four cases, respectively. Pin-track infection (PTI) was observed in 13 cases, and deep infection in seven. Infection resolved in all patients except four, who developed chronic osteomyelitis. None of the non-unions were associated with an infection. The overall functional result was satisfactory in 32 patients. PTI was the only predictive factor for chronic infection. Biplanar frames, when compared to monoplanar constructs, were associated with a significantly improved functional outcome.Conclusion: In comparison with the results obtained in the same environment without a locally-developed external fixator, the provision of such a device improved significantly the OTDF management, as it provided better stability and superior fracture healing rates. PTI remains an essential problem but with, hopefully, limited negative consequences. Trial registration: This study protocol was registered in Pan African Clinical Trial Registry under N°PACTR202009854874448. Date of registration 28 September 2020 ‘retrospectively registered’. www.pactr.org.

scholarly journals External fixator combined with three different fixation methods of fibula for treatment of extra-articular open fractures of distal tibia and fibula: a retrospective study

2020 ◽  
Author(s):  
DongDong Sun ◽  
Dan Lv ◽  
Kun Zhou ◽  
Jian Chen ◽  
Li-Lan Gao ◽  
...  
Keyword(s):  
Blood Loss ◽  
Fracture Healing ◽  
External Fixator ◽  
Distal Tibia ◽  
Operation Time ◽  
Healing Time ◽  
Open Fractures ◽  
Group A ◽  
Group B ◽  
Ankle Function

Abstract Background To compare the efficacy of three different fixation methods of fibula combined with external fixation of tibia for the treatment of extra-articular open fractures of distal tibia and fibula. Methods From January 2017 to July 2019, 91 cases of open fractures of distal tibia and fibula were treated with external fixator, and the fibula was fixed with non-fixation (group A, n=35), plate-screw (group B, n=30) and Kirschner wire(group C, n=26).The operation time, intraoperative blood loss, surgical and implants costs, fracture healing time, postoperative complications, and American Orthopaedic Foot and Ankle surgery (AOFAS) scores were compared among the groups. Results Four patients were lost to follow-up, and 87 patients were followed up for 5-35 months (average, 14.2 months). The operation time of group C(114.92±36.09min) was shorter than that of group A (142.27±47.05min) and group B(184.00±48.56min) (P<0.05). There was no difference in intraoperative blood loss among the three groups (P>0.05). The surgical and implants costs in group C (5.24±1.21, thousand dollars) is lower than that in group A (6.48±1.11, thousand dollars) and group B (9.37±2.16, thousand dollars) (P < 0.05).The fracture healing time of group C(5.67±1.42months) was significantly less than that of group A (6.90±1.33months) and group B(6.70±1.12months) (P<0.05). The postoperative complications such as fractures delayed union and nonunion in group C (2 cases, 8.00%) is less than that in group A (13 cases, 39.39%) and group B (11cases, 37.93%) (P<0.05). The wound infection and needle-tract infection did not differ among the three groups (P>0.05). The excellent or good rate of ankle function was 69.70% in group A, 72.41% in group B and 84.00% in group C, with no statistical difference among the three groups (P>0.05). conclusion Compared with simple external fixator fixation and external fixator combined with plate-screw osteosynthesis, external fixator combined with K-wire intramedullary fixation shortens the operative time and fracture healing time, reduced costs and complications of fracture healing, while the blood loss, infection complications and ankle function recovery showed no difference with the other two groups. External fixator combined with plate-screw osteosynthesis had no advantage in treating extra-articular open fractures of distal tibia and fibula when compared with simple external fixation.

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