[Orthopaedic technology and neuromuscular scoliosis : Orthotics, wheelchair seating shells and positioning aids]. / Orthopädische Technik und neuromuskuläre Skoliosen : Rumpforthetik, Rollstuhl- und Sitzschalenversorgung.

Children and adolescents with neuromuscular scoliosis usually undergo severe challenges with their respiratory and locomotor systems during growth. Early onset scoliotic deformities take a whole team of specialists to ease the problematic side effects associated with poor posture and seating abilities. Wheelchairs and seating shells need to be adjusted as does suitable bracing for the collapsing spine. Key issues are the maintenance of proper lung function and upright sitting in the wheelchair or seating shell. Although spine bracing can be helpful and has its place in seating, the natural history of progression in neuromuscular curvatures is rarely sustainably stopped. While bracing is sometimes not tolerated by patients with severe hypotonic thoracic collapse and breathing issues, it can otherwise buy time for some patients to gain height and weight before surgical intervention inevitably takes place.

[Physiotherapeutic and rehabilitative options for neuromuscular scolioses : Areas of physiotherapy techniques in the field of tension between hypertonic and hypotonic forms of neuromuscular scoliosis]. / Physiotherapeutische und rehabilitative Möglichkeiten bei neuromuskulären Skoliosen : Arbeitsfelder krankengymnastischer Techniken im Spannungsfeld hypertoner und hypotoner Formen neuromuskulärer Skoliosen.

Conservative treatment and physiotherapy (PT) of neuromuscular scoliosis and its underlying systemic causes is dominated by a pragmatic approach. In the choice of treatment, the observance of the underlying muscle tone sets the essential course to select an appropriate PT technique. Hypertonic forms need the reflex-modulation techniques included in Bobath or Vojta programmes. They sometimes necessitate tone-reducing medication and additional orthotics with a likely risk of pressure sores. In hypotonic forms of scoliosis on the other hand, gravity and spine collapse with pulmonal dysfunction are the key issues addressed by conservative treatment. Sustained quality of life and supported partaking in social life through maintenance of pulmonary function and upright sitting ability are of continuing concern. PT programmes with a neurophysiologic background such as those of Bobath and Vojta are of central significance.

Lower Limb Malrotation Is Regularly Present in Long-Leg Radiographs Resulting in Significant Measurement Errors.

Weight-bearing long-leg radiographs are commonly used in orthopaedic surgery. Measured parameters, however, change when radiographs are conducted in different rotational positions of the leg. It was hypothesized that rotational errors are regularly present in long-leg radiographs resulting in wrong measurements. In 100 consecutive long-leg radiographs conducted according to the method of Paley, rotation was assessed by fibular overlap. Angular parameters in radiographs (mechanical lateral proximal femoral angle (mLPFA), mechanical lateral distal femoral angle (mLDFA), angle between the anatomical and mechanical femoral axis (AMA), mechanical medial proximal tibia angle (mMPTA), mechanical lateral distal tibial angle (mLDTA), and the mechanical femoral and tibial axis (mFA-mTA) were measured and deviations related to malrotation calculated. An average internal rotation of 8 degrees was found in lower limbs showing a range between 29 degrees of internal and 22 degrees of external rotation. As a result, mean differences before and after rotational correction for measured parameters (mLPFA, mLDFA, AMA, mMPTA, mLDTA, mFA-mTA) ranged between 0.4 and 1.7 degrees (-2.1; 5.6 95% confidence interval [CI]). In conclusion, malrotation of lower limbs is regularly present in long-leg radiographs. As all measured parameters are influenced by malrotation, correct lower limb rotation needs to be verified.

[Conservative and surgical treatment of idiopathic scoliosis]. / Konservative und operative Therapie der idiopathischen Skoliose.

Idiopathic scoliosis is the largest group of all forms of scoliosis in the growth phase accounting for 80-90%. A distinction is made between idiopathic infantile (0-3 years), juvenile (4-10 years) and adolescent scoliosis (>10 years), depending on the age when scoliosis appears. The treatment depends on the skeletal age, the Cobb angle and the progression behavior of scoliosis. Mild cases are treated conservatively using physiotherapy, exercises and bracing but in advanced stages scoliosis should be surgically treated. With existing growth potential various techniques, such as traditional growing rods, magnetically controlled growth rods and vertebral body tethering are available. After the end of the growth phase a fusion should be recommended for scoliosis >50°.

A Knee Size-Independent Parameter for Malalignment of the Distal Patellofemoral Joint in Children.

INTRODUCTION: Patellar instability (PI) is a common finding in children. Current parameters describing patellofemoral joint alignment do not account for knee size. Additionally, most parameters utilize joint-crossing tibiofemoral landmarks and are prone to errors. The aim of the present study was to develop a knee size-independent parameter that is suitable for pediatric or small knees and determines the malpositioning of the distal patellar tendon insertion solely utilizing tibial landmarks. METHODS: Sixty-one pediatric knees were included in the study. The tibial tubercle posterior cruciate ligament distance (TTPCL) was measured via magnetic resonance imaging (MRI). The tibial head diameter (THD) was utilized as a parameter for knee size. An index was calculated for the TTPCL and THD (TTPCL/THD). One-hundred adult knees were analyzed to correlate the data with a normalized cohort. RESULTS: The THD was significantly lower in healthy females than in males (69.3 mm ± 0.8 mm vs. 79.1 mm ± 0.7 mm; p < 0.001) and therefore was chosen to serve as a knee size parameter. However, no gender differences were found for the TTPCL/THD index in the healthy adult study cohort. The TTPCL/THD was significantly higher in adult PI patients than in the control group (0.301 ± 0.007 vs. 0.270 ± 0.007; p=0.005). This finding was repeated in the PI group when the pediatric cohort was analyzed (0.316 ± 0.008 vs. 0.288 ± 0.010; p=0.033). CONCLUSION: The TTPCL/THD index represents a novel knee size-independent measure describing malpositioning of the distal patellar tendon insertion determined solely by tibial landmarks.

Rotation of intramedullary alignment rods affects distal femoral cutting plane in total knee arthroplasty.

PURPOSE: Intramedullary rods are widely used to align the distal femoral cut in total knee arthroplasty. We hypothesised that both coronal (varus/valgus) and sagittal (extension/flexion) cutting plane are affected by rotational changes of intramedullary femoral alignment guides. METHODS: Distal femoral cuts using intramedullary alignment rods were simulated by means of a computer-aided engineering software in 4°, 6°, 8°, 10°, and 12° of valgus in relation to the femoral anatomical axis and 4° extension, neutral, as well as 4°, 8°, and 12° of flexion in relation to the femoral mechanical axis. This reflects the different angles between anatomical and mechanical axis in coronal and sagittal planes. To assess the influence of rotation of the alignment guide on the effective distal femoral cutting plane, all combinations were simulated with the rod gradually aligned from 40° of external to 40° of internal rotation. RESULTS: Rotational changes of the distal femoral alignment guides affect both the coronal and sagittal cutting planes. When alignment rods are intruded neutrally with regards to sagittal alignment, external rotation causes flexion, while internal rotation causes extension of the sagittal cutting plane. Simultaneously the coronal effect (valgus) decreases resulting in an increased varus of the cutting plane. However, when alignment rods are intruded in extension or flexion partly contradictory effects are observed. Generally the effect increases with the degree of valgus preset, rotation and flexion. CONCLUSION: As incorrect rotation of intramedullary alignment guides for distal femoral cuts causes significant cutting errors, exact rotational alignment is crucial. Coronal cutting errors in the distal femoral plane might result in overall leg malalignment, asymmetric extension gaps and subsequent sagittal cutting errors.

[Disease-specific Knowledge in Conservative Treatment of Adolescent Idiopathic Scoliosis]. / Krankheitsspezifisches Wissen in der konservativen Therapie der idiopathischen Adoleszentenskoliose.

BACKGROUND: The typical onset of adolescent idiopathic scoliosis falls in a sensitive stage of life. Nevertheless, conservative brace treatment requires a high degree of compliance. Disease-specific knowledge influences therapy outcome in many diseases and potentially improves patient compliance and quality of life. We analysed disease-specific knowledge and quality of life of patients with adolescent idiopathic scoliosis. METHODS: Scoliosis patients (n = 67) undergoing conservative brace treatment were asked to answer a questionnaire with items about scoliosis-specific knowledge. This was anonymous and prior to regular interviews and examinations. The scoliosis-research-society-22 r score was determined in order to assess quality of life. RESULTS: The major sources of information for the patients were the attending physicians and the world wide web. The majority stated that they understood the nature of scoliosis, although their answers to more detailed questions revealed a major lack of knowledge. A significant gap in provision of information was found, especially in the field of therapy regimen and treatment goals. The expected duration of the therapy was unclear to most patients. Nevertheless, higher quality of life correlated with high compliance and patients who regarded alleviation of the disturbing appearance of their trunk as a main treatment aim also experienced a lower quality of life in the section of self image. CONCLUSIONS: Our study revealed a significant lack of disease-specific knowledge in patients with idiopathic scoliosis. Facilitation of knowledge might improve quality of life and therapy outcome in the future. As the attending physicians are the main source of information, it is up to us to improve this situation.

Current therapeutic strategies of heterotopic ossification--a survey amongst orthopaedic and trauma departments in Germany.

BACKGROUND: Heterotopic ossification (HO) is a complication after tissue trauma, fracture and surgery (i.e. total hip arthroplasty). Prophylaxis is the most effective therapy. If HO formations become symptomatic and limit patients' quality of life, revision surgery is indicated and is usually combined with a perioperative oral prophylaxis (NSAIDs) and/or irradiation. However, a long-term use of NSAIDs can induce gastro-intestinal or cardiac side-effects and possible bony non-unions during fracture healing. Subject of this study was to assess the current status of HO prophylaxis after injuries or fractures and to evaluate current indications and strategies for excision of symptomatic HO. METHODS: Between 2013 and 2014, a questionnaire was sent to 119 orthopaedic and trauma surgery departments in Germany. Participation was voluntary and all acquired data was given anonymously. RESULTS: The cumulative feedback rate was 71 %. Trauma and orthopaedic surgery departments in Germany recommend oral HO prophylaxis after acetabulum and femoral neck fractures, elbow dislocation, and fracture or dislocation of the radial head. Pain upon movement and an increasing loss of range of motion in the affected joint are considered to be clear indications for HO surgery. A partial removal of ROM-limiting HO formations was also considered important. The vast majority of all departments include perioperative oral HO prophylaxis and/or irradiation if surgical HO removal is planned. The choice and duration of NSAIDs is highly variable. CONCLUSION: HO is of clinical significance in current traumatology and orthopaedics. Certain fractures and injuries are prone to HO, and prophylactic measures should be taken. The respondents in this survey assessed current therapeutic strategies for HO formations similarly. These concepts are in line with the literature. However, the duration of perioperative oral HO prophylaxis varied greatly among the specialist centres. This is significant as a long-term use of NSAIDs fosters a potential risk for the patients' safety and could influence the clinical outcome. National and international guidelines need to be developed to further reduce HO rates and improve patients' safety in trauma and orthopaedic surgery.

Stability of pedicle screws after kyphoplasty augmentation: an experimental study to compare transpedicular screw fixation in soft and cured kyphoplasty cement.

OBJECTIVE: The goal of this cadaver study was to compare the stability of pedicle screws after implantation in soft or cured kyphoplasty cement. METHODS: Pedicle screws were inserted in a total of 30 thoracolumbar vertebrae of 10 different human specimens: 10 screws were implanted in nonaugmented vertebrae (group 1), each 10 screws were placed in soft (group 2) and cured (group 3) cement. Pedicle screws were than evaluated for biomechanical axial pullout resistance. RESULTS: Mean axial pullout strength was 232 N (range 60-600 N) in group 1, 452 N (range 60-1125 N) in group 2 and 367 N (range 112-840 N) in group 3. The paired Student t-test demonstrated a significant difference between pullout strength of groups 1 and 2 (P = 0.0300). Between pullout strength of groups 1 and 3 and between groups 2 and 3 no significant difference was seen. CONCLUSION: We achieved a 1.9 times higher pullout strength with kyphoplasty augmentation of osteoporotic vertebrae compared with the pullout strength of nonaugmented vertebrae. Implantation of pedicle screws in cured cement is a sufficient method. With this method we found a 1.6 times higher pullout strength then in nonaugmented vertebrae.

Recurrent crepitant cellulitis caused by Clostridium perfringens.

A previously healthy 13-year-old boy developed extensive subcutaneous emphysema of the lower limb after a penetrating injury to the knee. Clostridium perfringens was isolated from the wound. Despite surgical debridement and appropriate antibiotics, the emphysema recurred, and prolonged antibiotic treatment was required. This case highlights the distinction between gas gangrene and the lesser known entity of clostridial crepitant cellulitis.