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Papers by Eric Luis

<b>Copyright information:</b>Taken from "Acromioclavicular joint dislocation: a ... more <b>Copyright information:</b>Taken from "Acromioclavicular joint dislocation: a comparative biomechanical study of the palmaris-longus tendon graft reconstruction with other augmentative methods in cadaveric models"http://www.josr-online.com/content/2/1/22Journal of Orthopaedic Surgery and Research 2007;2():22-22.Published online 27 Nov 2007PMCID:PMC2235831.

Research article Acromioclavicular joint dislocation: a comparative biomechanical study of the pa... more Research article Acromioclavicular joint dislocation: a comparative biomechanical study of the palmaris-longus tendon graft reconstruction with other augmentative methods in cadaveric models

Journal of Surgical Simulation, 2022

Between 2011 and 2020, in the Macao Special Administrative Region, China, critical health care re... more Between 2011 and 2020, in the Macao Special Administrative Region, China, critical health care reforms took place with simulation training in medical education. The introduction of simulation training for postgraduates at the Faculty of Health Sciences at the Macau University of Science and Technology (MUST) was a key driver of this health care services reform, supported with two public health care lecture forums: the Sino Luso International Medical Forum launched in 2011 and the Sino Asia Pacific Medical Forum, established in 2015. Advocacy and education from these forums also helped pave the way for approval from the Macao SAR Government Gazette of the first Bachelor of Medicine, Bachelor of Science (MBBS) programme on 14 January 2019. The programme was launched on 2 September 2019 at the newly opened Faculty of Medicine (formerly Faculty of Health Sciences) at the MUST. The strategy was based on a threepronged approach, starting with the implementation of simulation-based postgraduate training programmes, creating internationally supported medical lecture forums, and ending with the establishment of the medical school. The strategy has led to a solid foundation to successfully adopt leading-edge technology for medical and clinical training and education, meeting the needs of future health care and health care providers.

which permits unrestricted use, distribution, and reproduction in any medium, provided the origin... more which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. An eight year old boy with Henoch-Schonlein Purpura (HSP) presented with acute compartment syndrome (ACS) of his left hand following arterial cannulation of his radial artery in intensive care unit. Emergency decompression and fasciotomy were performed. The authors report this first case in literature and discuss how HSP can be complicated by ACS and ways to prevent the latter from happening. Background Henoch-Schonlein Purpura is one of the most common vasculitides of childhood and is considered to be self-limiting. One manifestation of HSP that can continue to cause lifelong problems is renal involvement [1]. In 1990, the American College of Rheumatology published diagnostic criteria for HSP. These included (1) Palpable purpura-slightly raised "palpable " hemorrhagic

The state-of-the-art silicone 3D printing technologies, which has revolutionized the practice of ... more The state-of-the-art silicone 3D printing technologies, which has revolutionized the practice of medicine, are reviewed in this paper.

This paper discusses medical grade silicone use in the production of medical implants and devices... more This paper discusses medical grade silicone use in the production of medical implants and devices and reviews the stateof-the-art silicone 3D printing technologies including stereolithography [1], moisture-cured extrusion [2], heat-cured extrusion, hybrid jetting and UV-extrusion [3] and freeform reversible embedding [4] including PICSIMA [5]. The advantages and disadvantages of each method are discussed in detail and the challenges unique to silicone 3D Printing are highlighted.

Purpose: This study was done to determine whether a) there is a correlation between the Notch Wid... more Purpose: This study was done to determine whether a) there is a correlation between the Notch Width Index (NWI) and notch volume, as measured by Magnetic Resonance Imaging (MRI), in patients with ACL-injured and non-ACL injured knees, b) there is a difference in NWI between patients with and without anterior cruciate ligaments tear, c) there is a relationship between ACL diameter, angle of ACL inclination and ACL injury and d) there are differences in distal femur morphology between the ACL-injured and non-ACL injured knees. Materials and methods: In this study, 59 ACL-injured patients and 59 match-control ACL-intact patients were enrolled. MRI was used to measure the notch width, notch height and condylar widths. The thickness of ACL and ACL angle of inclination were also measured. Results: Statistically, Notch Width Index (NWI) (0.47 +/- 0.07 vs 0.43+/-0.05, p <0.05) and Medial-condyle tolateral condyle ratio (M:L ratio) ( 1.07 +/- 0.11 vs 1.02 +/- 0.09, p = 0.023) were all sig...

Primary vertebral leiomyosarcoma of the spine is extremely rare. Due to its rarity, the number of... more Primary vertebral leiomyosarcoma of the spine is extremely rare. Due to its rarity, the number of studies on pathology, treatment and prognosis is limited. Tissue Biopsy and Immunohistochemical staining techniques provide unequivocal diagnosis of leiomyosarcoma. The mainstay of treatment of spinal leiomyosarcoma is surgery, with or without radiotherapy and embolization. The principles of surgery comprise resection of tumor, decompression and stabilisation of the spinal cord and prevention of tumor recurrence. The Tomita total en-bloc resection is the preferred surgical technique. We hereby present a literature review of spinal leiomyosarcoma and a case report of the first case of a 56-year-old lady in Malaysia who was diagnosed with L3 vertebral leiomyosarcoma and lung metastasis.

Polymers

Additive manufacturing (AM) or 3D printing is a digital manufacturing process and offers virtuall... more Additive manufacturing (AM) or 3D printing is a digital manufacturing process and offers virtually limitless opportunities to develop structures/objects by tailoring material composition, processing conditions, and geometry technically at every point in an object. In this review, we present three different early adopted, however, widely used, polymer-based 3D printing processes; fused deposition modelling (FDM), selective laser sintering (SLS), and stereolithography (SLA) to create polymeric parts. The main aim of this review is to offer a comparative overview by correlating polymer material-process-properties for three different 3D printing techniques. Moreover, the advanced material-process requirements towards 4D printing via these print methods taking an example of magneto-active polymers is covered. Overall, this review highlights different aspects of these printing methods and serves as a guide to select a suitable print material and 3D print technique for the targeted polymer...

Polymers

Osteoarthritis of the knee with meniscal pathologies is a severe meniscal pathology suffered by t... more Osteoarthritis of the knee with meniscal pathologies is a severe meniscal pathology suffered by the aging population worldwide. However, conventional meniscal substitutes are not 3D-printable and lack the customizability of 3D printed implants and are not mechanically robust enough for human implantation. Similarly, 3D printed hydrogel scaffolds suffer from drawbacks of being mechanically weak and as a result patients are unable to execute immediate post-surgical weight-bearing ambulation and rehabilitation. To solve this problem, we have developed a 3D silicone meniscus implant which is (1) cytocompatible, (2) resistant to cyclic loading and mechanically similar to native meniscus, and (3) directly 3D printable. The main focus of this study is to determine whether the purity, composition, structure, dimensions and mechanical properties of silicone implants are affected by the use of a custom-made in-house 3D-printer. We have used the phosphate buffer saline (PBS) absorption test, F...

Journal of medical case reports, Jan 2, 2007

An eight year old boy with Henoch-Schonlein Purpura (HSP) presented with acute compartment syndro... more An eight year old boy with Henoch-Schonlein Purpura (HSP) presented with acute compartment syndrome (ACS) of his left hand following arterial cannulation of his radial artery in intensive care unit. Emergency decompression and fasciotomy were performed. The authors report this first case in literature and discuss how HSP can be complicated by ACS and ways to prevent the latter from happening.

Journal of Orthopaedic Surgery and Research, 2007

Background: Acromioclavicular injuries are common in sports medicine. Surgical intervention is ge... more Background: Acromioclavicular injuries are common in sports medicine. Surgical intervention is generally advocated for chronic instability of Rockwood grade III and more severe injuries. Various methods of coracoclavicular ligament reconstruction and augmentation have been described. The objective of this study is to compare the biomechanical properties of a novel palmaris-longus tendon reconstruction with those of the native AC+CC ligaments, the modified Weaver-Dunn reconstruction, the ACJ capsuloligamentous complex repair, screw and clavicle hook plate augmentation.

Journal of Hand Surgery (European Volume), 2012

Journal of Hand Surgery (European …, 2012

Kienb??ck's disease usually afflicts adults and may be due to stress on the lunate or compro... more Kienb??ck's disease usually afflicts adults and may be due to stress on the lunate or compromise of its vascular supply (Gelberman et al., 1980). It can cause wrist pain and loss of function. In advanced disease, carpal collapse with proximal migration of the capitate ...

Polymers

The first successful direct 3D printing, or additive manufacturing (AM), of heat-cured silicone m... more The first successful direct 3D printing, or additive manufacturing (AM), of heat-cured silicone meniscal implants, using biocompatible and bio-implantable silicone resins is reported. Silicone implants have conventionally been manufactured by indirect silicone casting and molding methods which are expensive and time-consuming. A novel custom-made heat-curing extrusion-based silicone 3D printer which is capable of directly 3D printing medical silicone implants is introduced. The rheological study of silicone resins and the optimization of critical process parameters are described in detail. The surface and cross-sectional morphologies of the printed silicone meniscus implant were also included. A time-lapsed simulation study of the heated silicone resin within the nozzle using computational fluid dynamics (CFD) was done and the results obtained closely resembled real time 3D printing. Solidworks one-convection model simulation, when compared to the on-off model, more closely correlat...

Sports Injuries & Medicine

The meniscus is the most common damaged structure of the knee, accounting for almost one million ... more The meniscus is the most common damaged structure of the knee, accounting for almost one million cases of knee surgeries performed annually in the United States alone. A complete meniscectomy (complete meniscus removal) was the most common procedure performed in 1889 and was the standard procedure in the next 80 years. However, follow-up radiographic studies from the late 1960s to 1980s reported a high frequency of post-meniscectomy osteoarthritis of the knee.

Journal of Surgical Simulation, 2022

Polymers

Journal of medical case reports, Jan 2, 2007

Journal of Orthopaedic Surgery and Research, 2007

Journal of Hand Surgery (European Volume), 2012

Journal of Hand Surgery (European …, 2012

Polymers

Sports Injuries & Medicine