Discrimination between healthy and degenerated bovine articular cartilage with a fiber Bragg grating based microindenter.

In this study we aim to show that an optical fiber Bragg grating-based microindentation system, which has the potential to be deployed arthroscopically, can differentiate between healthy and degenerated articular cartilage, which represents an important challenge in minimally-invasive surgery. DESIGN: Twenty bovine osteochondral cylinders, extracted from the patellar groove of ten 24 months old animals were subjected to stepwise in vitro stress-relaxation indentation measurements. The indentation procedure comprised 15 indentation steps of 20 μm each, reaching a total depth of 300 μm. Ten samples remained untreated and served as a control group for healthy cartilage. A second group of ten samples was treated for 12 h with an aqueous trypsin solution (concentration 2.5%) to deplete the proteoglycans. For both groups and all indentation depths deeper than 100 μm, the step response functions of a two elements Maxwell-Wiechert model fitted well to the measured relaxation curves. RESULTS: The standard deviations of the identified stiffness parameters within each group were much smaller than the difference of the average stiffness values between both groups. Based on the measured stiffness values, the system was capable to discriminate between healthy and degenerated cartilage with a high level of significance (p 
Source: Journal of the Mechanical Behavior of Biomedical Materials - Category: Materials Science Authors: Tags: J Mech Behav Biomed Mater Source Type: research

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ConclusionAll arthroscopic coracoclavicular button fixation of Neer type II distal clavicle fractures would provide sufficient stability and union with satisfactory radiological and clinical outcomes. This arthroscopic fixation technique would be more efficient than other osteosynthesis methods because it is a minimally invasive surgery with a low complication rate.Level of evidenceIII.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
Over the past few decades, minimally invasive surgery has become increasingly common across all medical specialties, and orthopedics is no exception. New research and technologies have led to improved methods of joint replacement, treatment of traumatic injuries, arthroscopic treatment of sports injuries, and endoscopic or arthroscopic treatment of complex musculoskeletal conditions, such as congenital anomalies and neurosurgical-associated conditions. The authors of this issue have provided valuable information about procedures ranging from endoscopic carpal tunnel release to minimally invasive total joint arthroplasty.
Source: Orthopedic Clinics of North America - Category: Orthopaedics Authors: Tags: Preface Source Type: research
We appreciate the interest and comments expressed by You et  al. regarding our recently published article.1 In our study, we compared the surgical outcomes of arthroscopic reduction and minimally invasive surgery (ARMIS) and traditional open reduction–internal fixation (ORIF) for supination–external rotation ankle fractures.
Source: Arthroscopy - Journal of Arthroscopic and Related Surgery - Category: Surgery Authors: Tags: Letter to the Editor Source Type: research
We read with great interest the article entitled “Arthroscopic Reduction and Minimally Invasive Surgery in Supination-External Rotation Ankle Fractures: A Comparative Study With Open Reduction” by Chiang et al.1 in a recent issue of the journal. We agree that arthroscopic reduction and minimally invasive surgery (ARMIS) could achieve superior surgical outcomes with a shorter postoperative stay and lower incidence of complications compared with open reduction–internal fixation (ORIF). In addition, regarding early postoperative pain, we wish to share our point of view with regard to the statistical analysis.
Source: Arthroscopy - Journal of Arthroscopic and Related Surgery - Category: Surgery Authors: Tags: Letter to the Editor Source Type: research
This study compares the short-term clinical and radiographic outcome between conventional and minimally invasive posterior approaches in total hip arthroplasty. Study Design &Methods We conducted a prospective, comparative pilot study containing 30 patients who underwent primary total hip arthroplasty between January 2017 and May 2017, 15 of them were operated through a conventional posterior approach and the other 15 were operated upon using a minimally invasive posterior approach. The exclusion criteria were severe protrusio or acetabular dysplasia as well as severe obesity (more than 120 kg body weight or a body m...
Source: Journal of Arthroscopy and Joint Surgery - Category: Orthopaedics Source Type: research
Knee arthroscopy is a minimally invasive surgery used in the treatment of intra-articular knee pathology which may cause unintended damage to femoral cartilage. An ultrasound (US)-guided autonomous robotic platform for knee arthroscopy can be envisioned to minimise these risks and possibly to improve surgical outcomes. The first necessary tool for reliable guidance during robotic surgeries was an automatic segmentation algorithm to outline the regions at risk. In this work, we studied the feasibility of using a state-of-the-art deep neural network (UNet) to automatically segment femoral cartilage imaged with dynamic volume...
Source: Ultrasound in Medicine and Biology - Category: Radiology Authors: Tags: Original Contribution Source Type: research
Advancements in lesser metatarsophalangeal (MTP) instability have involved the use of minimally invasive surgery techniques, synthetic augmentation of existing transfers, and use of arthroscopy for both diagnosing and addressing MTP disorder. Advances in imaging modalities, particularly MRI, have aided in diagnosing subtle instability. Clinical outcomes seem to be similar to traditional approaches as the indications and applicability continue to evolve.
Source: Foot and Ankle Clinics - Category: Orthopaedics Authors: Source Type: research
Publication date: Available online 19 September 2019Source: Arthroscopy TechniquesAuthor(s): Kai Man Chu, Tun Hing LuiAbstractSubfibular impingement is a common cause of lateral heel pain after calcaneal fracture. It can be caused by calcaneofibular impingement, peroneal impingement, or a combination thereof. It may not be easy to differentiate bony impingement from soft-tissue impingement. Simultaneous lateral calcaneal ostectomy and peroneal tendon decompression may increase the chance of pain relief. The purpose of this Technical Note was to report the technical details of endoscopic lateral calcaneal ostectomy and pero...
Source: Arthroscopy Techniques - Category: Surgery Source Type: research
Publication date: Available online 12 September 2019Source: Arthroscopy TechniquesAuthor(s): Tun Hing Lui, Yue Ting Ophelia WanAbstractOs subfibulare is an ossicle at the tip of the lateral malleolus. The ossicle is sometimes symptomatic and presents with local pain or lateral ankle instability. The purpose of this Technical Note is to describe the details of arthroscopic stabilization of the os subfibulare. It is indicated for symptomatic mechanical lateral ankle instability resulting from an unstable os subfibulare. The technique has the advantages of minimally invasive surgery, evaluation and treatment of concomitant an...
Source: Arthroscopy Techniques - Category: Surgery Source Type: research
Publication date: Available online 11 September 2019Source: Arthroscopy TechniquesAuthor(s): Yue Ting Ophelia Wan, Tun Hing LuiAbstractOsteochondral lesions of the talar head can be classified into 4 types according to their location. A type 1 lesion is located at the anterior part of the talar head. Surgical debridement and microfracture are indicated for symptomatic type 1 lesions if conservative treatment fails to relieve the pain. The purpose of this technical note was to describe the details of arthroscopic debridement and microfracture of the symptomatic type 1 osteochondral lesion of the talar head and the kissing l...
Source: Arthroscopy Techniques - Category: Surgery Source Type: research
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