A novel internal fixation method for open book injuries of the pubic symphysis— A biomechanical analysis

2020 ◽  
Vol 77 ◽  
pp. 105009 ◽  
Author(s):  
Tobias Fritz ◽  
Laura Mettelsiefen ◽  
Friedemann Strobel ◽  
Benedikt J. Braun ◽  
Steven C. Herath ◽  
...  
Keyword(s):  
Internal Fixation ◽  
Pubic Symphysis ◽  
Biomechanical Analysis ◽  
Fixation Method ◽  
Open Book

scholarly journals Failure of Internal Fixation of The Anterior Ring For Unstable Pelvic Fractures, The Experience of A Single Institute

2021 ◽  
Author(s):  
Sheng Zhang ◽  
Huagui Mo ◽  
Yucheng Liu ◽  
Guohua Zhu ◽  
Bin Yu
Keyword(s):  
Internal Fixation ◽  
Pelvic Ring ◽  
Treatment Strategies ◽  
Pubic Symphysis ◽  
Pelvic Fractures ◽  
Fixation Failure ◽  
Initial Surgery ◽  
Multidisciplinary Cooperation ◽  
Preoperative Plan ◽  
Anterior Ring

Abstract Background: This study aimed to share our experience of anterior ring fixation failure for unstable pelvic fractures and propose corresponding treatment strategies. Materials: From January 2009 to December 2018, 93 patients with pelvic fractures were retrospectively reviewed. Patients with failure of the anterior ring internal fixation within 3 months after initial surgery were analyzed. Quality of reduction was evaluated using the Majeed scoring system.Results: According to the Tile classification of fracture, there were 23 cases of type B1, 17 cases of type B2, 11 cases of type B3, 28 cases of type C1, 6 cases of type C2, and 8 cases of type C3. The duration from injury to pelvic internal fixation ranged from 5-28 days. Seven out of 93 patients experienced failure of internal fixation of the anterior pelvic ring within 3 months, including 2 patients fixed with an external fixator and 5 patients were fixed with a plate. Five patients undergoing revision surgery were followed up for 6-36 months with an average of 18 months. According to Majeedscore at the last follow-up, there were 2 cases of excellent, 2 cases of good, 1 case of fair, and the excellent and good rate reached 80%.Conclusion: The treatment of complicated unstable pelvic fractures requires early multidisciplinary cooperation, proper management of hemodynamic stability and other comorbidities, and performing internal fixation surgery within 2 weeks. It is necessary to make a preoperative plan and stabilize the posterior ring first, avoiding a single steel plate crossing the pubic symphysis.

scholarly journals PUBIC SYMPHYSIS DIASTASIS IN PREGNANCY AND DELIVERY (REVIEW)

2018 ◽  
Vol 24 (3) ◽  
pp. 145-156
Author(s):  
A. L. Petrushin ◽  
A. V. Pryaluchina
Keyword(s):  
Internal Fixation ◽  
Treatment Options ◽  
Pubic Symphysis ◽  
Lower Limbs ◽  
Sacroiliac Joints ◽  
Pubic Symphysis Diastasis ◽  
Partial Load ◽  
Short Period ◽  
Pregnancy And Delivery ◽  
Symphysis Diastasis

Purpose of the study— to generalize and arrange the data published in scientific literature and to present currentviews on epidemiology, diagnostics and treatment options for pubic symphysis diastasis during pregnancy and delivery. Semeiotic separation wider than 10 mm is considered pubic symphysis diastasis during pregnancy and delivery. Diastasis above 14-25 mm might be associated with ruptures of sacroiliac joints. Frequency of such pathology is reported in the range from 0,03 to 2,8%. Key risk factors of this pathology include multiparity and repeated labor. Symptoms of pubic separation include pain and signs of pelvic instability manifesting immediately after delivery or within a short period of time after the delivery. AP roentgenography is the principal diagnostics method however lately ultrasound exam is done more frequently. Conservative option prevails in treatment of pubic symphysis diastasis. Surgical procedures are recommended in case of separation above 30-50 mm, ruptures of sacroiliac joints, open lesions, failed conservative treatment and urological dysfunction. In such cases preferred option is the internal fixation by plate and screws. Some authors use external fixation. Late-term outcomes of both methods do not demonstrate significant differences. Pain regress after the surgery is observed within 3 weeks to 6 months postoperatively, walking with partial load is restored in 5-14 days, full load on the lower limbs is possible 6 months postoperatively. Indications for removal of implants after internal fixation are not clearly defined. Following surgical treatment of pubic symphysis diastasis the majority of authors incline to subsequent operative delivery.

A Biomechanical Study of an Alternative Internal Fixation Method for Transverse Patella Fractures

Orthopedics ◽  
2018 ◽  
Vol 41 (5) ◽  
pp. e643-e648
Author(s):  
Shuai Han ◽  
Dongdong Li ◽  
Peixun Zhang ◽  
Xiaofeng Yin ◽  
Yuhui Kou ◽  
...  
Keyword(s):  
Internal Fixation ◽  
Biomechanical Study ◽  
Fixation Method ◽  
Patella Fractures

Ankle spanning external fixator with limited internal fixation for distal tibial extra-articular fractures

2017 ◽  
Vol 5 (10) ◽  
pp. 4355
Author(s):  
Siddharth Goel ◽  
Abhay Elhence
Keyword(s):  
Soft Tissue ◽  
Internal Fixation ◽  
External Fixation ◽  
External Fixator ◽  
Tibial Fractures ◽  
Fixation Method ◽  
Ankle Pain ◽  
Distal Tibial Fractures ◽  
Tract Infections

Background: Fractures of the distal tibia are among the most difficult fractures to treat. The short distal segment presents difficulty in choosing the appropriate fixation method. The greatest challenge lies in the relatively tight soft tissue around the ankle. As a result, it has been a recent interest in treating these fractures with external fixation and limited internal fixation. The external stable fixation methods used are tubular or ring fixators, with or without immobilising the ankle. This minimally invasive nature of the surgery can avoid catastrophic wound complications like dehiscence, implant exposure and infection.Methods: 18 patients with extra-articular distal tibial fractures (AO Type 43A) were treated with the technique of ankle spanning external fixation. Lag screws or K-wires were supplemented for limited internal fixation when required. Fibula was stabilised in all cases. Intra- articular and Compound fractures were excluded. In addition to union at fracture site, ankle pain and motion was noted in each follow-up.Results: The mean follow-up was 25 months. Of the 18 patients included all but one fractures united with an average healing time of 16 to 18 weeks. Ankle pain and motion was graded according to Mazur modified by Teeny and Wiss clinical scoring system. 15 of them had excellent or good results, 2 had fair results. One patient had poor result. Five pin tract infections occurred. 17 patients had no evidence of osteoarthritis after completing follow up of at least 2 years.Conclusions: Distal tibial fractures are complex injuries, not only regarding the bony component, but also in terms of the management of the soft tissue problem. Ankle Spanning External Fixator with Limited Internal fixation is a relatively simple and cost-effective method for treating these fractures, achieving union and also maintaining ankle function.

scholarly journals Distal tibial pilon fractures (AO/OTA type B, and C) treated with the external skeletal and minimal internal fixation method

2013 ◽  
Vol 70 (9) ◽  
pp. 836-841 ◽  
Author(s):  
Sasa Milenkovic ◽  
Milorad Mitkovic ◽  
Ivan Micic ◽  
Desimir Mladenovic ◽  
Stevo Najman ◽  
...  
Keyword(s):  
Internal Fixation ◽  
Ankle Joint ◽  
Fixation Method ◽  
Universal Method ◽  
Type B ◽  
Tibial Pilon ◽  
Post Surgery ◽  
Articular Fractures ◽  
Type C ◽  
Pilon Fractures

Background/Aim. Distal tibial pilon fractures include extra-articular fractures of the tibial metaphysis and the more severe intra-articular tibial pilon fractures. There is no universal method for treating distal tibial pilon fractures. These fractures are treated by means of open reduction, internal fixation (ORIF) and external skeletal fixation. The high rate of soft-tissue complications associated with primary ORIF of pilon fractures led to the use of external skeletal fixation, with limited internal fixation as an alternative technique for definitive management. The aim of this study was to estimate efficacy of distal tibial pilon fratures treatment using the external skeletal and minimal internal fixation method. Methods. We presented a series of 31 operated patients with tibial pilon fractures. The patients were operated on using the method of external skeletal fixation with a minimal internal fixation. According to the AO/OTA classification, 17 patients had type B fracture and 14 patients type C fractures. The rigid external skeletal fixation was transformed into a dynamic external skeletal fixation 6 weeks post-surgery. Results. This retrospective study involved 31 patients with tibial pilon fractures, average age 41.81 (from 21 to 60) years. The average follow-up was 21.86 (from 12 to 48) months. The percentage of union was 90.32%, nonunion 3.22% and malunion 6.45%. The mean to fracture union was 14 (range 12-20) weeks. There were 4 (12.19%) infections around the pins of the external skeletal fixator and one (3.22%) deep infections. The ankle joint arthrosis as a late complication appeared in 4 (12.90%) patients. All arthroses appeared in patients who had type C fractures. The final functional results based on the AOFAS score were excellent in 51.61%, good in 32.25%, average in 12.90% and bad in 3.22% of the patients. Conclusion. External skeletal fixation and minimal internal fixation of distal tibial pilon fractures is a good method for treating all types of inta-articular pilon fractures. In fractures types B and C dynamic external skeletal fixation allows early mobility in the ankle joint.

scholarly journals Biomechanical analysis of tension-compression asymmetry, anisotropy and heterogeneity of bone reconstruction in response to periprosthetic fracture repair

2019 ◽  
Keyword(s):  
Mechanical Properties ◽  
Internal Fixation ◽  
Periprosthetic Fracture ◽  
Bone Repair ◽  
Molecular Mechanisms ◽  
Biomechanical Analysis ◽  
Theoretical Research ◽  
Periprosthetic Femoral Fracture ◽  
Bone Reconstruction ◽  
Tension Compression Asymmetry

Introduction. Bone repair after periprosthetic fracture is a critical issue in orthopedics. Objectives. So there is a need for research to provide new medical solutions, especially in the context of population ageing in the Ukraine. The importance of biomechanics which is concerned with the application of principles, concepts and methods of mechanics of solid and fluid to the human body in motion and at rest is well recognized as a foundation for further experimental and theoretical research in the skeletal tissues. Materials and methods. Different aspects of biomechanics require different concepts and methods of mechanics of solid and fluid to be used. Remodeling occurs significantly throughout lifetime of bone that is why it can be regarded as a primary determinant of the mechanical properties of bone and implant. Biomechanical analysis given in this review has been concerned with understanding on how mechanical signals and molecular mechanisms affect the healing of Vancouver periprosthetic femoral fracture of B1 and C-type with the use of internal fixation through a less invasive stabilization system (LISS)-plate, which is screwed into the artificial hip joint. Results. Identification of such parameters as mechanical properties of bone, titanium alloys (hip prosthesis, coating, LISS-plate, screws) and implant/biomaterial interface with bone under mechanical and biochemical loading that are very essential for predicting arthroplasty outcomes were investigated experimentally considering elastoplastic deformation, creep, fatigue and ratcheting, as well as, damage development in materials under discussion. Among the basic deformation features were tension-compression asymmetry, anisotropy and heterogeneity of mechanical properties. We used the three-dimensional finite element model derived from the reconstruction of treatment and magnetic resonance (tomographic) images. Conclusions. As a result of this model analysis, it was found that treatment rate of periprosthetic femoral fractures after total hip arthroplasty with the use of LISS-plates and screws for internal fixation may be controlled by means of ABAQUS (or ANSYS) software package to reproduce the characteristic features of bone and implant in bone reconstruction in order to improve the fracture healing rate and shorten treatment duration Introduction. Bone repair after periprosthetic fracture is a critical issue in orthopedics. Objectives. So there is a need for research to provide new medical solutions, especially in the context of population ageing in the Ukraine. The importance of biomechanics which is concerned with the application of principles, concepts and methods of mechanics of solid and fluid to the human body in motion and at rest is well recognized as a foundation for further experimental and theoretical research in the skeletal tissues. Materials and methods. Different aspects of biomechanics require different concepts and methods of mechanics of solid and fluid to be used. Remodeling occurs significantly throughout lifetime of bone that is why it can be regarded as a primary determinant of the mechanical properties of bone and implant. Biomechanical analysis given in this review has been concerned with understanding on how mechanical signals and molecular mechanisms affect the healing of Vancouver periprosthetic femoral fracture of B1 and C-type with the use of internal fixation through a less invasive stabilization system (LISS)-plate, which is screwed into the artificial hip joint. Results. Identification of such parameters as mechanical properties of bone, titanium alloys (hip prosthesis, coating, LISS-plate, screws) and implant/biomaterial interface with bone under mechanical and biochemical loading that are very essential for predicting arthroplasty outcomes were investigated experimentally considering elastoplastic deformation, creep, fatigue and ratcheting, as well as, damage development in materials under discussion. Among the basic deformation features were tension-compression asymmetry, anisotropy and heterogeneity of mechanical properties. We used the three-dimensional finite element model derived from the reconstruction of treatment and magnetic resonance (tomographic) images. Conclusions. As a result of this model analysis, it was found that treatment rate of periprosthetic femoral fractures after total hip arthroplasty with the use of LISS-plates and screws for internal fixation may be controlled by means of ABAQUS (or ANSYS) software package to reproduce the characteristic features of bone and implant in bone reconstruction in order to improve the fracture healing rate and shorten treatment duration.

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