The use of twin-ring Ilizarov external fixator constructs: Application and biomechanical proof-of principle with possible clinical indications

Background: In peri- or intra-articular fractures of the tibia or femur, the presence of short metaphyseal bone fragments may make the application of an Ilizarov external fixator (IEF) challenging. In such cases, it may be necessary to bridge the adjacent joint in order to ensure stable fixation. The twin-ring (TR) module of circular external fixation is proposed as an alternative method that avoids joint bridging, without compromising stability of fixation. The aim of this study is to present the experimental tests performed to compare the biomechanical characteristics of the single- and TR IEF modules. The clinical application of the TR module in select patients is also presented and the merits of this technique are discussed.Methods: In this experimental study, the passive stiffness and stability of the single-ring (SR) and twin-ring (TR) IEF modules were tested under axial and shear loading conditions. In each module, two perpendicular wires on the upper surface and another two wires on the lower surface of the rings were used for fixation of the rings on plastic acetal cylinders simulating long bones.Results: In axial loading, the main outcome measure was stiffness and the SR module proved stiffer than the TR. In shear loading, the main outcome measure was stability, the TR module proving more stable than the SR.Discussion: The TR configuration, being stiffer in shear loading, may make joint bridging unnecessary when an IEF is applied. If it is still required, TR frames allow for an earlier discontinuation of bridging; either case is in favour of a successful final outcome.Conclusion: The application of the TR module has led to satisfactory clinical outcomes and should be considered as an alternative in select trauma patients treated with an IEF. Biomechanically, the TR module possesses features which enhance fracture healing and at the same time obviate the need for bridging adjacent joints, thereby significantly reducing patient morbidity. © 2011 Grivas and Magnissalis; licensee BioMed Central Ltd

Use of ASEPSIS scoring method for the assessment of surgical wound infections in a Greek orthopaedic department

Background: In Greece there is no systematic assessment of surgical wounds with the use of a validated instrument, while the ASEPSIS scoring method has been widely used internationally. Aim: To examine the frequency of wound infections and their correlations both with patient background factors, as well as surgery factors, with the use of ASEPSIS. Methods: In this prospective, observational study, participants undergoing orthopaedic surgeries in a large hospital in Greece were assessed during hospitalisation and the first month after discharge using the ASEPSIS wound assessment tool. The principles of the Declaration of Helsinki were applied. Non-parametric statistical analyses were performed using SPSS 20.0. Results: In total, 111 patients participated; nearly half (49.5%) had a total ASEPSIS score of “0”. Almost 3 out of 4 patients (76.6%) had an ASEPSIS score under or equal to “10” (satisfactory healing) and only 3.6% had a minor or severe surgical wound infection. The ASEPSIS score was only positively correlated to longer surgery duration and longer postoperative stay. Discussion: The frequency of surgical wound infections in orthopaedic patients in Greece is comparable to that described in the literature. ASEPSIS could be used for assessing patients and as a performance indicator in Greek orthopaedic departments. © 2018 Elsevier Lt

Fracture of the base of first metacarpal (Bennett fractures) treated with close reduction and Kirschner wire fixation: 16-25 years outcomes

Bennett's injury is a fracture dislocation of the first carpo-metacarpal joint. The causative mechanism is axial overloading along the first metacarpal with simultaneous flexion. The palmar oblique ligament holds the palmar marginal fragment in its anatomical position. The different treatment options are the following: a) using local anesthetics in Emergency Room (ER) or typical surgical treatment in operative room with close reduction followed by percutaneous Kirschner wire, b) open reduction and internal fixation with screws or tension band wiring, c) external fixation. The aim of this study is to report a series of patients with Bennett's fractures who were treated under local anesthesia with closed reduction and percutaneous K-wire fixation, and the presentation of the long term, (16-25 years), follow-up outcomes, which were very good in all the reported patients without development of posttraumatic arthritis

Truncal changes in patients suffering severe hip or knee osteoarthritis: A surface topography study

Backgroud: Osteoarthritis (OA) of the hip and knee is a degenerative disease with complications, including reduced range of motion and pain. Although OA of the hip and knee is common, there are few studies that investigated if patients with this condition had affected morphological truncal parameters. The objectives of this study were to compare the morphology of the spine and the pelvis of patients with hip or knee OA to that of a control group (CG) and to comment on the proposed mechanisms of these changes and the clinical effects on patients. Methods: This study included three groups of individuals. The first group consisted of 34 patients (15 men and 19 women with a mean age of 67.62 ± 8.28 years) suffering from hip OA. The second group consisted of 45 patients (11 men and 34 women with a mean age of 72.47 ± 7.0 years) suffering from knee OA. These patients were compared with a CG, which consisted of 25 individuals (13 men and 12 women with a mean age of 69.28 ± 10.11 years). The DIERS formetric 4D analysis system was used to calculate several truncal parameters in all planes. All analyses were accomplished using the SPSS ver. 17.0, and p < 0.05 was used to determine statistical significance. Results: Patients with hip OA presented with significantly increased values than those in the CG for sagittal imbalance, scoliosis angle, vertebral rotation, trunk torsion, and pelvic obliquity, and decreased values than those in the CG for fleche lombaire. Patients with knee OA presented with significantly increased values than those in the CG for sagittal imbalance, apical deviation, scoliosis angle, vertebral rotation, trunk torsion, and pelvic obliquity. Patients with hip or knee OA, compared to the CG, had greater forward inclination of the spine, greater scoliosis, greater vertebral rotation and trunk torsion, and greater obliquity of the pelvis at the frontal plane. Conclusions: Patients with severe hip or knee OA could have truncal morphology alterations, in addition to reduced hip or knee range of motion and pain. These alterations could cause significant negative effects, which may then seriously affect the patients' quality of life. © 2021 by The Korean Orthopaedic Association

A modified technique for the treatment of intra-articular calcaneal fractures with the use of the Ilizarov apparatus

The management of intra-articular calcaneal fractures during the past years has been ranged from the nihilistic approach of no active treatment to open reduction and internal fixation (ORIF) or even to early subtalar arthrodesis. The management of such fractures with the use of circular external fixators in a closed fashion or in combination with minimal approach is demonstrated in our study. The midterm results of 36 intra-articular calcaneal fractures treated between 1996 and 2003 with the use of the Ilizarov apparatus according to our modified operative strategy are presented. In treating calcaneal fractures, the classic Essex-Lopresti classification into depression and tongue type has been proved very useful in our hands. While the depression-type fractures can be reduced through skeletal traction and the above-mentioned minimal approach, tongue-type fractures can cause difficulties in reducing and especially maintaining the reduction of the tongue fragment. Especially for these fractures, a combined technique was applied by reducing the fracture with Steinmann pins according to the Essex-Lopresti method and incorporating them into the Ilizarov apparatus. This technique appears to be a lot easier and more accurate than the alternative "bent-wire technique" for reducing and holding down a tongue fragment. The original Essex-Lopresti manipulation alone with plaster immobilization does not allow weight bearing and is associated with regional osteoporosis. Apart from the Essex-Lopresti classification, the material was also categorized by the widely accepted Sanders CT classification for comparison of our results to those of the literature. The SF-36 patient-oriented general health status questionnaire was utilized before, during, and after the treatment period to assess patients' satisfaction levels. We propose this operative strategy as an option for the treatment of all calcaneal fractures. © Springer-Verlag 2005

Rib hump deformity assessment using the rib index in adolescent idiopathic scoliotics treated with full screw or hybrid constructs: Aetiological implications

Background: Review of literature reveals that in Idiopathic Scoliosis (IS) children, the post-operative rib hump (RH) correction using full transpedicular screw construct has never been compared to hybrid constructs, applying the Rib-Index (RI) method. Therefore the aim of this report is to study which of the above two constructs offers better postoperative Rib Hump Deformity (RHD) correction. Methods: Twenty five patients with Adolescent Idiopathic Scoliosis (AIS) were operated using full pedicle screw construct or hybrid construct. Sixteen underwent full screw instrumentation (group A) and nine an hybrid one (group B). The median age for group A was 15 years and for group B 17.2 years. The RHD was assessed on the lateral spinal radiographs using the RI. The RI was calculated by the ratio of spine distances d1/d2, where d1 is the distance between the most extended point of the most extending rib contour and the posterior margin of the corresponding vertebra on the lateral scoliosis films and d2 is the distance from the least projected rib contour and the posterior margin of the same vertebra. Moreover the amount of RI correction was calculated by subtracting the post-operative RI from the pre-operative RI. Results: Although within group A the RI correction was statistical significant (the pre-op RI was 1.93 and the post-op 1.37; p<0.001) and similarly in group B (the mean pre-op RI was 2.06 while the mean post-op 1.51; p=0.008), between group A and B the post-operative RI correction mean values were found to be no statistically significant, (p=0.803). Conclusion: Although the pre- and post-operative RI correction was statistically significant within each group, this did not happen post-operatively between the two groups. It appears that the RHD correction is not different, no matter what the spinal construct type was used. Provided that the full screw construct is powerful, the post-operative derotation and RHD correction was expected to be better than when an hybrid construct is applied, which is not the case in this study. It is therefore implied that the RHD results more likely from the asymmetric rib growth rather than from vertebral rotation, as it has been widely believed up to now. In 2013 Lykissas et al, reported that costoplasty combined with pedicle screws and vertebral derotation significantly improved RH deformity as opposed to pedicle screws and vertebral derotation alone. Another interesting implication is that the spinal deformity is the result of the thoracic asymmetry, implication in line with the late Prof. John Sevastikoglou's (Sevastik's) thoracospinal concept. © 2015 Soultanis et al; licensee BioMed Central Ltd

Bent femoral intramedullary nails: a report of two cases with need for urgent removal

Two cases of bent intramedullary femoral nail removal are presented. Both patients had to be operated, for different reasons, as soon as possible. A metal cutting blade was used as an option for partial or full sectioning of the nails. For both cases, a lateral approach was required. For one case, this approach had to be combined with a small anteromedial incision so that the blade could move across the thigh. One nail was removed in one piece and the other in two pieces separately. Both nails were exchanged with other interlocked nails. Both fractures healed without complications despite the extensive and relatively traumatic approach. Our rationale for nail sectioning depending on angulation elements is presented and proposed. © Springer-Verlag 2004

The rib index is not practically affected by the distance between the radiation source and the examined child

Background: All lateral spinal radiographs in idiopathic scoliosis (IS) show a Double Rib Contour Sign (DRCS) of the thoracic cage, a radiographic expression of the rib hump. The outline of the convex overlies the contour of the concave ribs. The rib index (RI) method was extracted from the DRCS to evaluate rib hump deformity in IS patients. The RI was calculated by the ratio of spine distances d1/d2 where d1 is the distance between the most extended point of the most extending rib contour and the posterior margin of the corresponding vertebra on the lateral scoliosis films, while d2 is the distance from the least projection rib contour and the posterior margin of the same vertebra, (Grivas et al 2002). In a symmetric thorax the "rib index" is 1. This report is the validity study of DRCS, ie how the rib index is affected by the distance between the radiation source and the irradiated child. Methods: The American College of Radiology's (2009) guidelines for obtaining radiographs for scoliosis in children recommends for the scoliotic - films distance to be 1,80 meters. Normal values used for the transverse diameter of the ribcage in children aged 6-12 years were those reported by Grivas in 1988. Results: Using the Euclidean geometry, it is shown that in a normal 12-year old child d1/d2 = 1.073 provided that the distance Z ≈ 12cm (11,84) and EA = 180cm, with transverse ribcage diameter of the child 22 cm. Conclusions: This validity study demonstrates that the DRCS is substantially true and the RI is not practically affected by the distance between the radiation source and the irradiated child. The RI is valid and may be used to evaluate the effect of surgical or conservative treatment on the rib cage deformity (hump) in children with IS. It is noted that RI is a simple method and a safe reproducible way to assess the rib hump deformity based on lateral radiographs, without the need for any other special radiographs and exposure to additional radiation. © 2015 Grivas et al; licensee BioMed Central Ltd

Subchondral cyst development and MMP-1 expression during progression of osteoarthritis: An immunohistochemical study

Background: Subchondral bone cyst (SBC) formation is often identified in patients with osteoarthritis. Furthermore, several studies have shown that expression of matrix metalloproteinases (MMPs) is elevated in patients with OA. Objectives: The aim of our study is to correlate the presence of SBCs and MMP-1 expression with the osteochondral alterations during OA progression. Methods: We studied the cartilage and subchondral bone of 15 patients who had undergone total knee or hip replacement due to primary OA. As controls, we used the femoral heads of three patients without macroscopic OA changes. We evaluated three specimens per patient. Results: Specimens were divided in four groups based on the Mankin histological severity score. Using immunohistochemistry, we noted SBCs at the site of greatest disease severity. Specifically, these were present more frequently in group III (Mankin score: 6-7) and IV (Mankin: ≥. 8), compared with group I (Mankin: 1-3) and II (Mankin: 4-5). Mild OA stages (Mankin: 1-6) were characterized by degeneration and thinning of the cartilage, followed by increased osteoblast and osteoclast activity of the subjacent bone and the subsequent appearance of SBCs. Simultaneously, we observed expression of MMP-1 in groups I and II in the cartilage and III and IV in both the cartilage and the subchondral bone. Moreover, osteoblast-like cells in the lining of the SBCs showed an increased expression of MMP-1 in stages III and IV. Conclusion: Our study provides immunohistological evidence that SBCs accumulate in advanced OA and contain activated cells, which express MMP-1, suggesting that they may thus participate in the osteochondral changes of OA. Level of evidence: Level III; prospective comparative study. © 2013 Elsevier Masson SAS