PubMed Journal Database | Der Orthopade 
The US National Library of Medicine and National Institutes of Health manage PubMed.gov which comprises of more than 21 million records, papers, reports for biomedical literature, including MEDLINE, life science and medical journals, articles, reviews, reports and books. BioPortfolio aims to publish relevant information on published papers, clinical trials and news associated with users selected topics.
For example view all recent relevant publications on Epigenetics and associated publications and clincial trials.
Showing PubMed Articles 1–25 of 184 from Der Orthopade
Strategies in revision shoulder arthroplasty.
The increasing number of primary shoulder arthroplasty operations is correlated to an increasing revision rate of up to 11.2 % for anatomical shoulder arthroplasty and 13.4 % for reverse shoulder arthroplasty. To reduce the risk of implant revision the surgeon has to take the possibility of late complications into account for the index operation and to choose a modular implant system. Indications for revision arthroplasty are secondary glenoid wear, aseptic loosening, infections, rotator cuff deficiency...
Survival rate and complications of stemmed shoulder prostheses in primary osteoarthritis.
Survivorship and survival rate of shoulder prostheses can be affected by a large number of possible complications. An evaluation of the current literature and the prosthesis register, however, shows an overall low revision (1.39 revisions per 100 observation years) and loosening rates (implant-related 10-year survival rate up to 99 %), comparable to that of hip and knee endoprostheses. It must be emphasized that cementless stems more often cause problems than cemented components (4.34 compared to 0.77 rev...
Resurfacing of the humeral head : Sensible indications.
Cup resurfacing of the humeral head is one of the possible prosthetic solutions for severe destruction of the glenohumeral joint. Because neurological complications are not uncommon after total shoulder arthroplasty using surface replacement, these cups are indicated when hemiarthroplasty is possible. The advantages of humeral head resurfacing are bone preservation and the technically easy exchange if revision is necessary; therefore, young patients are candidates for this type of endoprosthesis. At present...
Options and limits of stemless shoulder prostheses.
Currently there are five manufacturers offering stemless implants for shoulder joint replacement. A total number of almost 10,000 stemless implants have been used in shoulder arthroplasty since 2004. There are two different types of metaphyseal anchorage, one obtained by impaction of a fin system and in the other implant system cage screw fixation is used. Regarding revision surgery the different types of implants show varying advantages and disadvantages in terms of secondary approach to the glenoid and th...
Short stem shoulder prosthesis : Concept and first results.
The trend in shoulder arthroplasty is moving away from long stemmed, cemented humeral components to cementless, stemless and metaphyseal fixed implants and to humeral resurfacing. The cementless short stem prosthesis presents a concept that combines the advantages of a bone-saving implantation with a straightforward revision option. Furthermore, the stem may serve as a carrier for a convertible anatomic and reversed modular system. The concept consists of a stabile proximal fixation of the prosthesis by com...
Nerve injury after total hip replacement is a rare but severe complication. If the nerve lesion becomes evident in the early postoperative phase the lesion is often due to an incorrect implant position, direct nerve injury or vascular injury with manifestation of a hematoma which results in nerve compression. Secondary nerve lesions are more often due to a chronic hematoma with nerve compression. Secondary nerve lesions in particular are often a diagnostic challenge and should lead to an early revision afte...
Satisfaction after total knee arthroplasty : Comparison of 1990-1999 with 2000-2012.
Total knee arthroplasty (TKA) is one of the most common operations in orthopedic surgery worldwide but despite being mainly successful only 81 % of patients are satisfied with the final result. The following systematic review compared patient satisfaction and analyzed the causal connections and influencing factors after TKA between 1990-1999 and 2000-2012. From 1990 to 1999 a total of 81.2 % of patients were satisfied after TKA and in the period 2000-2012 patient satisfaction increased to 85 %. Influe...
BACKGROUND: The treatment options for advanced hallux rigidus include arthrodesis, excision arthroplasty (Keller-Brandes) and joint arthroplasty and based on the literature, arthrodesis still appears to be the gold standard. In recent years, technical advances and higher patient demands have led to an increasing use of total joint replacement but comparative data on patient satisfaction and clinical outcome of different forms of treatment are rare. MATERIAL AND METHODS: Between 1995 and 2005 a total of 27 p...
Spastic foot deformities in children : Surgical management.
Although the neurological defects associated with cerebral palsy are not progressive, secondary musculoskeletal disorders due to growth and gravity are variable. In the clinical analysis of spastic foot deformities different mechanisms that produce a variety of deformities have to be analyzed. The goals of surgical treatment are correction of the deformity, reestablishment of stability of the foot and preservation of functionally important ranges of motion and muscle strength. The most common spastic foot d...
The present article summarizes the different osteotomy techniques for an extension of standard surgical approaches to the knee joint in selected patients. The aim is to achieve satisfactory exposure and reduce potential postoperative complications compared to alternative techniques, such as the V-Y plasty or the quadriceps snip procedures. Osteotomy of the tibial tubercle is a reasonable extension of the anteromedial or the anterolateral surgical approach in selected patients undergoing revision total knee...
Update on metal-on-metal hip joints.
Increasing data are available describing risk factors for the development of local and systemic adverse events following operations using metal-on-metal (MoM) hip implants. The prevalence and clinical relevance of metal-associated problems are, however, still under debate. They can be influenced by type and position of implant as well as patient-specific factors. Patients with small MoM heads (maximum diameter 32 mm) and subgroups of resurfacing arthroplasty can achieve good long-term survival. The use of...
Malleolar osteotomy - Osteotomy as approach.
Both arthroscopic and open surgical techniques may be used for treatment of osteochondral lesions of the ankle joint. Osteotomy around the ankle joint is a well established technique to extend the approach in cases where the osteochondral lesions are located more posteriorly. Medial, oblique, monoplanar malleolar osteotomy should be used in patients with lesions of the medial talus shoulder. The posterolateral ostechondral lesions are less frequent and in such cases distal fibular osteotomy is recommended....
Osteotomies for an expansion of the surgical approach.
The biomechanics of screws, cerclage wire and cerclage cable.
In contrast to fracture fixation, when performing an osteotomy the surgeon is able to plan preoperatively. The resulting fixation and compression of the bone fragments are the most important points. A stable osteosynthesis should prevent dislocation of bone fragments and improve bone healing. Beside plates, cerclages can be used for tension band or diaphysis bone fixation. Moreover, cortical or cancellous screws can be used for osteotomy fixation. This work describes biomechanical principles for fixation af...
Finite element analyses (FEA) as well as multibody system dynamics (MSD) are the main tools used for numerical simulation in the field of musculoskeletal research. While FEA is utilized for field problems, such as calculation of stress and strain distribution, MSD is applied for solving kinematic analyses, such as calculation of muscle and joint forces. Depending on the focus of investigation, modelling of biological tissue may vary from simple homogeneous behavior to modelling biochemical processes on the...
Publish in Der Orthopäde - does it benefit the career?
BACKGROUND: There is no evidence-based treatment algorithm established for acromioclavicular joint (AC joint) dislocation classified as type Rockwood III injury. Recent meta-analyses revealed no advantage of surgical treatment compared to the non-operative approach. Both surgical and non-surgical approaches have been reported with inconsistent results. Therefore, the hypothesis of the current study was that patients classified as having Rockwood grade III injury may have different degrees of horizontal AC j...
BACKGROUND: The limited regeneration capacity of hyaline articular cartilage requires detailed studies concerning the tissue integration of cartilage transplants with meaningful but time and/or resource-consuming and in part ethically problematic animal models or, alternatively, with in vitro test systems for implant materials. MATERIAL AND METHODS: The present study describes a regeneration model with bovine cartilage rings (outer Ø 6 mm, central defect Ø 2 mm) for insertion, cultivation and biomechani...
Specific biomechanical properties represent important quality markers of cartilage tissue engineering (TE) constructs. The aim of the study was to identify a sensitive biomechanical test to assess mechanical properties of cartilage TE constructs. Biomechanical testing of in vitro cultivated constructs following the very low rubber hardness (VLRH) principle illustrated significant differences between constructs cultured under chondrogenic conditions over various periods of time. An increase in proteoglycan a...
Bone marrow edema syndrome (BMES).
Bone marrow edema (BME) syndrome represents a pathologic accumulation of interstitial fluid in bone - with a traumatic BME being differentiated from a non-traumatic, often ischemic, and a reactive as well as a mechanical BME. Atraumatic/ischemic BME is inconsistently described as a separate entity or as a reversible preliminary stage of osteonecrosis (ON). However, there is always the risk of transformation of BME into ON and subsequent joint destruction. The most common sites of BME are the hip, knee, and...
INTRODUCTION: The principle philosophy of posterior spinal instrumentation and fusion (PSIF) for the treatment of adolescent idiopathic scoliosis (AIS) has changed during recent decades. In the past the treatment of AIS mainly focused on correction of the major curve in the frontal plane while the sagittal profile and balancing were only of inferior interest in treatment planning. Various long-term outcome studies have demonstrated that many AIS patients developed a flatback syndrome (decrease of thoracic k...
Diagnosis and treatment of tarsal coalitions and synostoses in children and adolescents.
The majority of tarsal coalitions are located in the calcaneonavicular and talocalcaneal regions and other locations are rare. Complete early ossified synostoses are found not only in major limb deficiencies but also in otherwise normal feet. Magnetic resonance imaging (MRI) and computed tomography (CT) scans are the most important imaging techniques especially for preoperative planning. Early resection is advisable in calcaneonavicular coalitions as soon as it is detected in childhood and adolescence. Indi...
More muscle mass in men : Explanatory model for superior outcome after total hip arthroplasty.
BACKGROUND: Men show better functional results after total hip arthroplasty (THA). The aim of this study was a patient-specific analysis of the hip joint muscles in comparison to the joint geometry. METHODS: In this study 93 computed tomography (CT) scans of the pelvis (45 men, 48 women) were analyzed to determine hip joint geometry and the volume of the gluteus medius (GMV), gluteus maximus (GXV) and tensor fasciae latae (TFL) muscles. The abduction muscle volumes were analyzed with respect to patient-spec...
BACKGROUND: Preservation of movement at the treated segment and possible reduction of adjacent segment effects is assumed to be an advantage of non-fusion technologies over fusion. The aim of this study was to compare the segmental range of motion (ROM) at the operative level, the cranial and caudal adjacent levels and the global lumbar spine ROM (L2-S1) after monosegmental fusion and total disc replacement (TDR). PATIENTS AND METHODS: Radiographic data was collected from 27 patients with level 1 degenerat...
Conservative therapy of osteoarthritis.
Osteoarthritis of the knee is a degenerative joint disease with progressive degradation of articular cartilage and subchondral bone. Symptoms may include joint pain, tenderness, stiffness, locking and joint effusion depending on the stage of the disease. In an effort to delay major surgery, patients with knee osteoarthritis are offered a variety of nonsurgical modalities, such as weight loss, exercise, physiotherapy, bracing, orthoses, nonsteroidal anti-inflammatory drugs (NSAIDs) and intra-articular viscos...
