Displaying publications 61 - 80 of 134 in total

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  1. Tamadon A, Pons DJ, Clucas D, Sued K
    Materials (Basel), 2019 Oct 01;12(19).
    PMID: 31581446 DOI: 10.3390/ma12193215
    One of the difficulties with bobbin friction stir welding (BFSW) has been the visualisation of microstructure, particularly grain boundaries, and this is especially problematic for materials with fine grain structure, such as AA6082-T6 aluminium as here. Welds of this material were examined using optical microscopy (OM) and electron backscatter diffraction (EBSD). Results show that the grain structures that form depend on a complex set of factors. The motion of the pin and shoulder features transports material around the weld, which induces shear. The shear deformation around the pin is non-uniform with a thermal and strain gradient across the weld, and hence the dynamic recrystallisation (DRX) processes are also variable, giving a range of observed polycrystalline and grain boundary structures. Partial DRX was observed at both hourglass boundaries, and full DRX at mid-stirring zone. The grain boundary mapping showed the formation of low-angle grain boundaries (LAGBs) at regions of high shear as a consequence of thermomechanical nature of the process.
    Matched MeSH terms: Shoulder
  2. Mohd Shaffid Md Shariff, Hanizah Ngadiron, Firdaus Hayati, Nornazirah Azizan, Affirul Chairil Ariffin
    MyJurnal
    Fracture is common after trauma. Proximal humeral fracture can occur in the elderly after fall and in youngsters after motor vehicle accidents (MVA) and sport injuries. A 37-year-old man was admitted with a fracture of his left proximal humerus following an MVA. He sustained a 3-part fracture and treated surgically using a PHILOS plate. There are few options in managing proximal humerus fracture ranging from conservative to surgical intervention based on its severity. We reminiscent the usage of PHILOS plate as a mode of treatment of such fracture.
    Matched MeSH terms: Shoulder Fractures
  3. Ali Md Nadzalan
    MyJurnal
    This study was conducted to investigate i) while the shoulder was in 180° of flexion and the elbow extended, which of the forearm position (supination, pronation and neutral) can generate the greatest handgrip strength, ii) is there any correlation of the handgrip strength between the dominant hand (right hand) and non-dominant hand (left hand) in each forearm position, and iii) will the dominant hand possessed 10% higher handgrip strength than the non-dominant hand. 100 right handed sedentary active students age 22.20 years old (± 1.03), height 172.83 cm (± 6.37), body mass 68.87 (± 11.52) and grip position 3.77 (± 0.77) were recruited in this study. The result indicated that for both the dominant and non-dominant hand, when the shoulder is in 180˚ flexion of the body with the elbow extended, the greatest grip strength was obtained when the forearm was in neutral position followed by pronation and supination position. Post Hoc analysis showed that for both dominant hand and non-dominant hand, pronation and supination forearm position produced greater strength score compared to supination forearm position (p0.05). In all forearm position, participants were shown to produced significantly greater strength in their dominant hand and all the scores were more than 10% greater compared to when using non-dominant hand. Positive relationships were also found for the strength score between dominant hand and non-dominant hand. As the conclusion, different shoulder, elbow and forearm position can affect handgrip strength.
    Matched MeSH terms: Shoulder
  4. Othman BH, Toda T, Kikuchi T
    Zookeys, 2016.
    PMID: 27551211 DOI: 10.3897/zookeys.605.8562
    A new species of Leptostraca, Nebalia terazakii sp. n. is described and figured. The species was sampled from the coral reefs of Pulau Payar Marine Park, Langkawi, Malaysia. There are 32 existing species of Nebalia but Nebalia terazakii sp. n. can be distinguished from the other known species of Nebalia by the following combination of characters: the rostrum is 1.89 times as long as wide and the eyes have no dorsal papilla or lobes. Article 4 of the antennular peduncle has one short thick distal spine. The proximal article of the endopod of maxilla 2 is shorter than the distal, a feature peculiar to Nebalia terazakii sp. n., the exopod of maxilla 2 is longer than article 1 of the endopod, the posterior dorsal borders of the pleonites 6 to 7 are provided with distally sharp denticles, anal plate with prominent lateral shoulder and finally, the terminal seta of the caudal rami is 1.17 times the length of the entire rami.
    Matched MeSH terms: Shoulder
  5. Abdulkarim, S.M., Ghazali, H.M.
    MyJurnal
    HyperDSC™(fast scan rate) was used to study the melting behavior of canola (CLO), sunflower (SFO), palm olein (PO), rice bran oils (RBO), and cocoa butter (CB), and was compared to the melting behaviors using conventional DSC. There was an increase in sensitivity with increase in scan rate. Slow scan rate (5 to 20C/min) gave low sensitivity, which increased when the scan rates were increased to 50, 100 and 200C/min. Peak resolution was affected by scan rate depending on the sample weight. Increase in the size of sample coupled with the use of fast scan rate decreased the peak resolution. Generally small sample sizes gave better peak resolution. Results of the effect of scan rate on glass transition (Tg) shows that Tg, which is a weak transition especially in crystalline and low amorphous materials was not detected using conventional scan rates (5 to 20oC/min). It was however detected using of hyperDSC™ scan rates (100 to 200oC/min). Increasing the scan rate resulted in an increase in the peak temperature and the elimination of shoulder peaks, which were caused due to the polymorphic behavior of the triacylglycerols in the oils. The increase in peak temperature caused a shift in the peak position towards a higher temperature value. There is a positive correlation between the peak temperature and scan rate. The correlation coefficients (r) for CLO, SFO, PO, RBO and CB were 0.96, 0.95, 0.97, 0.96 and 0.96 respectively.
    Matched MeSH terms: Shoulder
  6. Sukadarin, E.H., Deros, B.M., Nawi, N.S.M., Rambely, A.S., Bakar, S.A., Tamrin, S.B.M.
    MyJurnal
    Posture is one of the most important factor that need to be considered in any postural analysis. Awkward, extreme,
    and repetitive postures can increase the risk of musculoskeletal disorders (MSDs). As observational methods are more
    widely used than instrumentation-based methods to assess postural problems, this study reviews and assesses the
    scientific literature of observational methods and focused on pen and paper based specifically. In order to identify the
    published methods, a list of English or Malay articles dating as far back as 1990 was compiled from PubMed, Science
    Direct and Google Scholar. The keywords were ergo*, posture*, method*, observational*, postural problems*, pen and
    paper*, posture analysis*, indirect* and macro-ergo*. In addition, a secondary search was also performed using
    bibliography of retrieved articles so that additional papers for conducting review and evaluations can be collected. A
    total of 121 articles that assessed postural problems in working activities were found. However, after intensive
    screening process only 6 articles were selected to be further analyzed. Posture of upper arms/shoulder, lower arms/
    elbow, wrist, neck, back/trunk and leg were highlighted in this study. The limitations and the strengths of the
    published pen and paper based observational method focusing on those postures were also discussed. The finding of
    this review will benefit researchers in the process of understanding unsafe posture in workplace. It could also provide
    to researcher on how to improve the current pen and paper based observational method for assessing postural
    problems.
    Matched MeSH terms: Shoulder
  7. Hanani Yuhaniz, Asnawi Seraila, Siti Rafedah Abdul Karim, Suhaimi Muhammed, Abdul Hamid Saleh
    MyJurnal
    In developing ergonomically sound furniture, there is a need in evaluating anthropometrics from various aspect such as gender differences. The objectives of this study was to evaluate anthropometrics differences between genders of children in Malaysia in order to determine the need in having specified chairs for each gender. Represented by four states in Malaysia, a total of 2400 children were involved in the study. A custom made measurer and an anthropometer were used to measure the subjects. Six body measurements, which are, sitting shoulder height, sitting subscapular height, shoulder breadth, buttock popliteal length, popliteal height and hip width were documented for evaluation. From this study, there were some significant differences on some body parts while other body parts were similar to male and female. Therefore, chairs are needed to be made according to the suitability of both gender.
    Matched MeSH terms: Shoulder
  8. Hanani Yuhaniz, Asnawi Seraila, Suhaimi Muhammed, Abdul Hamid Saleh
    MyJurnal
    This study on anthropometrics of Primary School children from grade 1 to 5 in Peninsular Malaysia involves 2310 students aged seven to eleven years old. The objectives were to analyze the differentiation of anthropometrics between children of grades 1 to 5 and grouping them to suitable levels in which they are appropriate to propose chair dimensions. A multi-stage sampling method was used, and rural and urban areas were also included in providing anthropometric database that represents the whole Peninsular Malaysia population. There were six dimensions measured in this study, which are sitting shoulder, sitting subscapular height, sitting elbow height, hip width, buttock-popliteal length and popliteal height. All the measurements were chosen to represent dimensions needed to construct ergonomic school chair. From the results, ANOVA showed p-values of
    Matched MeSH terms: Shoulder
  9. Ariffin, M. H., Selvyn Lloyd, Rhani, S. A., Kamalnizat, Baharudin, A.
    Malays Orthop J, 2014;8(2):40-42.
    MyJurnal
    The management of post-radiation wound breakdown over the posterior cervico thoracic region can be a challenging task for a surgeon. The aim of the treatment is to produce a well vascularized and a low tensile flap which will close a large defect. We describe the use of the lower trapezius flap to reconstruct the wound breakdown and to obtain stable tissue coverage in a patient with post- radiation necrosis. This flap minimizes the disruption of the scapula-thoracic function while preserving the range of movement over the shoulder. From the literature review, it was noted that the dorsal scapular artery (DSA) and transverse cervical artery (TCA) aid in the blood supply to the trapezius muscle and prevent local necrosis during rotation of the flap. The trapezius flap is widely accepted because of the minor donor site morbidity, large arc of rotation and adequate blood supply.
    Matched MeSH terms: Shoulder
  10. Hari Krishnan, T.
    MyJurnal
    Introductions: Call center has been defined as a working environment in which uses telephone and computer for the purpose of marketing and manage communication with prospect clients or existing clients (Rocha, Glina, Morinho and Nakasato, 2005; Sprigg, Smith and Jackson, 2003).
    Methodology: The study was conducted via observation of working condition and face to face interview with call center operators. Measurement of anthropometrics was also conducted.
    Results: Ergonomics issues found at call center were inappropriate work condition and workstation which lead to awkward sitting posture (sitting with forward leaning posture, raised shoulder, feet not supported on floor). Besides that organizational policy which required high job demand and subsequently lead to prolonged sitting and static posture (very minimal posture changes). Combination all these factors lead to musculoskeletal symptoms and the operators reported of having neck, shoulder, upper back and lower back pain compared to other body parts.
    Conclusion: The management should embark on organization wide ergonomics management program and should review the current policy and create safe and healthy working environment by providing suitable workstation for the operators in order to prevent musculoskeletal.
    Matched MeSH terms: Shoulder
  11. Singh, H.
    MyJurnal
    It is very rare indeed in the practice of children's orthopaedics today in Malaysia that the natural history of long bone osteomyelitis is seen. A case is presented where a shoulder abscess in a 3-year-old child developed into septic arthritis of the shoulder and subsequently chronic osteomyelitis of the adjacent humerus. The parents refused active surgical debridement and sequestrectomies. Three years later the child had regenerated a new humerus over the sequestra. Radiographs are presented illustrating the entire natural history of osteomyelitis with the regeneration of a new humerus.
    Matched MeSH terms: Shoulder
  12. Choy, Yew Sing, Sinniah, D.
    MyJurnal
    Reported is the first case of syringomyelia and syringobulbia associated with Arnold Chiari I malformation in a Malaysian child. The initial complaint was that of unilateral anhidrosis of the face. The chief presenting features were dissociated sensory loss, asymmetrical weakness of the left upper limb associated with subluxation of left shoulder and signs of upper motor neurone lesion in the left lower limb. One unusual feature was the presence of vesiculation followed by ulceration of the pinnae of both ears. Magnetic resonance imaging (MRI) of the posterior fossa and cervical and thoracic cord facilitated the diagnosis and was the most useful diagnostic procedure in this child.
    Matched MeSH terms: Shoulder
  13. Tan, K.K., Ibrahim, S.
    Malays Orthop J, 2007;1(1):45-46.
    MyJurnal
    We report a case of a broken K-wire migrating to the cervical spine from the right clavicle in a 9-year-old child. The initial diagnosis, fracture of the clavicle with an acromioclavicular joint dislocation, was treated by open reduction and K-wiring. One K-wire broke and migrated to the neck, posterolateral to the C6 vertebra. The K-wire was removed percutaneously under image intensification. Acromioclavicular joint dislocation in children is rare since the distal clavicle does not ossify until the age of 18 or 19 years meaning that almost all closed fractures of the clavicle in children can be treated nonoperatively.
    Matched MeSH terms: Shoulder Dislocation
  14. Keah RSH, Ch'ng KS
    Malays Fam Physician, 2013;8(2):62-64.
    PMID: 25606287 MyJurnal
    A 28-year-old man presented with a chief complaint of rashes all over his body. He had a history of a trip to Langkawi Island, a famous island resort off the west coast of Malaysia, over the Chinese New Year’s weekend. According to him, he had a lot of fun with a group of friends at the sunny beach and the beautiful sea. There were no untoward incidents and they were perfectly well when they returned home after a 2-day trip. On the evening of the second day after his return, he noticed rashes appearing over his body, notably on shoulders and trunk. These rashes were little painful in nature.
    Matched MeSH terms: Shoulder
  15. Nasir Mohd Nizlan, Azfar Rizal Ahmad, Hisham Abdul Rashid, Paisal Hussin, Che Hamzah Fahrudin, Abdullah Arifaizad, et al.
    MyJurnal
    Introduction: Degenerative disorder involving the acromioclavicular
    joint (ACJ) is quite common especially in the elderly.
    One of the surgical modalities of treatment of this disorder is the
    Mumford Procedure. Arthroscopic approach is preferred due to
    its reduced morbidity and faster post-operative recovery. One
    method utilizes the anteromedial and Neviaser portals, which
    allow direct and better visualization of the ACJ from the
    subacromial space. However, the dangers that may arise from
    incision and insertion of instruments through these portals are
    not fully understood. This cadaveric study was carried out to
    investigate the dangers that can arise from utilization of these
    portals and which structures are at risk during this procedure.
    Methods: Arthroscopic Mumford procedures were performed
    on 5 cadaver shoulders by a single surgeon utilizing the
    anteromedial and Neviaser portals. After marking each portals
    with methylene blue, dissection of nearby structures were
    carried out immediately after each procedure was completed.
    Important structures (subclavian artery as well as brachial plexus
    and its branches) were identified and the nearest measurements
    were made from each portal edges to these structures. Results:
    The anteromedial portal was noted to be closest to the
    suprascapular nerve (SSN) at 2.91 cm, while the Neviaser portal
    was noted to be closest also to the SSN at 1.60 cm. The
    suprascapular nerve was the structure most at risk during the
    Mumford procedure. The anteromedial portal was noted to be
    the most risky portal to utilize compared to the Neviaser portal.
    Conclusion: Extra precaution needs to be given to the
    anteromedial portal while performing an arthroscopic distal
    clavicle resection in view of the risk of injuring the
    suprascapular nerve of the affected limb.
    Matched MeSH terms: Shoulder
  16. Teo Chuun, B., Dian Darina Indah, D., Darliana, M.
    MyJurnal
    This study is aimed at seat design optimization for high-speed train based on the Malaysians sitting anthropometry
    data focusing on seat fit parameters. An analysis of anthropometry data composed of 15 dimensions that are
    required in seat design was done with 50 male subjects. These data were collected through direct measuring
    methods with standard equipment. According to the Malaysian automotive seat fit parameters, the backrest width,
    backrest height, cushion width, and cushion length were established based on these anthropometric dimensions:
    interscye breadth (5th percentile female and 95th percentile male), hip breadth (95th percentile female), sitting
    shoulder height (5th percentile female), and buttock-popliteal length (5th percentile female), respectively. This
    study uses the CATIA software to design and analyse the proposed seat design. The fit parameters proposed for the
    new design are seat height, 380mm; cushion width, 450mm; backrest width, 450mm and backrest height, 850mm.
    The CATIA human activity analysis (based on Rapid Upper Limb Analysis, RULA) was also executed. From the study,
    the new conceptual seat design gives the most optimized fit when compared to the current seat.
    Matched MeSH terms: Shoulder
  17. Chan CYW, Gani SMA, Lim MY, Chiu CK, Kwan MK
    Asian Spine J, 2019 Apr;13(2):216-224.
    PMID: 30472823 DOI: 10.31616/asj.2018.0151
    STUDY DESIGN: Prospective study.

    PURPOSE: To compare patients' and parents' perceptions of physical attributes (PAs) of adolescent idiopathic scoliosis (AIS) patients and to report any correlations between their perceptions and Scoliosis Research Society-22r (SRS-22r) scores.

    OVERVIEW OF LITERATURE: Few studies have looked into the differences between patients' and parents' perceptions of their appearance.

    METHODS: AIS patient-parent pairs (n=170) were recruited. The patients' and parents' perceptions of six PAs were evaluated: waist asymmetry (WA), rib hump (RH), shoulder asymmetry (SA), neck tilt, breast asymmetry (BrA), and chest prominence. These PAs were ranked, and an aggregate PA (Agg-PA) score was derived from a score assigned to the attribute (6 for the most important PA and 1 for the least important). The patients also completed the SRS-22r questionnaire.

    RESULTS: Ninety-nine patients (58.2%) and 71 patients (41.8%) had thoracic and lumbar major curves, respectively. WA was ranked first by 54 patients (31.8%) and 50 parents (29.4%), whereas RH was ranked first by 50 patients (29.4%) and 38 parents (22.4%). The overall Agg-PA scores were similar for patients and parents (p>0.05). However, for thoracic major curves (TMCs) >40°, a significant difference was noted between the Agg-PA scores of patients and parents for SA (3.5±1.6 vs. 4.2±1.6, p=0.041) and BrA (3.0±1.6 vs. 2.2±1.3, p=0.006). For TMCs <40°, a significant difference was found between the Agg-PA scores of patients and parents for WA (3.7±1.6 vs. 4.4±1.5, p=0.050). BrA was negatively correlated with total SRS-22r score.

    CONCLUSIONS: There were no significant differences between patients and parents in their ranking of the most important PAs. For TMCs >40°, there were significant differences in the Agg-PA for SA and BrA. Pa¬tients were more concerned about BrA and parents were more concerned about SA. Patients' perception of the six PAs had weak correlation with SRS-22r scores.

    Matched MeSH terms: Shoulder
  18. Ho W, Lin Seow L, Musawi A
    J Clin Transl Res, 2018 May 28;4(1):70-74.
    PMID: 30873496
    Background: The purpose of the present study was to investigate the effect of different viscosities of polyvinyl siloxane (PVS) impression materials on the accuracy of the stone die produced.

    Methods: A three-unit bridge master model was fabricated using cold-cure acrylic resin. Four combinations of different viscosities of PVS impression materials - regular body (monophase) alone, light body with regular body, light body with heavy body, and light body with putty - were used to make an impression of the master model. Ten impressions from each group were taken and Type IV gypsum stone was used to generate the dies. The dies were measured at the inter-abutment distance, occlusogingival length, and shoulder width with a measuring microscope and were compared with the master model using one-way analysis of variance and Tukey (honest significant difference) test.

    Results: Differences were found for inter-abutment distance between the master model and the light body with regular body and light body with putty dies (both P < 0.02). A difference was found for shoulder width between the master model and the regular body alone die (P = 0.01). No differences were found for occlusogingival distance (all P > 0.08).

    Conclusion: Results suggested inter-abutment distance was most accurate when using a PVS light body combination. Occlusogingival length was accurate using any of the studied PVS combinations, and shoulder width was more accurate when using the regular body PVS.

    Relevance for patients: These results should be considered when choosing the viscosity of the PVS to use for producing impressions of high accuracy and fabricating a well-fitting fixed prosthesis.

    Matched MeSH terms: Shoulder
  19. Yeap JS, Lee DJK, Fazir M, Borhan TAM, Kareem BA
    Med J Malaysia, 2004 Dec;59 Suppl F:19-23.
    PMID: 15941156 MyJurnal
    The case notes of 102 patients (117 shoulder dislocations) were reviewed retrospectively to improve the understanding of the epidemiology of this common injury. Eighty-one dislocations were primary and 36 dislocations were second or recurrent dislocations. The age distribution was characterized by a peak in male patients aged between 21-30 years. The mean age for males was 30.5 years and 47.7 years for females. The male:female ratio in first time dislocations was 5:2, while it was 5:1 in recurrent dislocations. Ninety-eight percent were anterior dislocations and 2% were posterior dislocations. Greater tuberosity fractures were found in 17 patients and almost half of these patients were aged between 41-50 years. The most common cause of first time dislocation was a direct blow or fall onto the shoulder, accounting for 42 patients (55%). The majority of these patients were aged 40 years and above. Next common cause was motor vehicle accident which occurred mostly in the younger age group. Dislocations due to sporting injuries accounted for only 5.3% of all first time dislocations. Nearly 97% were successfully reduced without a general anaesthesia. Seventy-seven percent of the patients had their shoulders immobilized after reduction, mostly with body strapping only. Fifteen patients (14.7%) were referred for physiotherapy for stiffness. Few operations were performed for recurrent dislocations but surgery does not appear to be well accepted as yet by our patients.
    Matched MeSH terms: Shoulder Dislocation/etiology; Shoulder Dislocation/epidemiology*
  20. Sam CX, Anwar AZ, Ahmad AR, Solayar GN
    Malays Orthop J, 2021 Mar;15(1):119-123.
    PMID: 33880158 DOI: 10.5704/MOJ.2103.018
    Introduction: Reverse total shoulder arthroplasty provides a surgical alternative to standard total shoulder arthroplasty for the treatment of cuff tear arthropathy, arthritis and fracture sequelae. This study aimed to assess the short-term outcomes following reverse total shoulder arthroplasty for patients in a large public hospital in Malaysia.

    Materials and Methods: We identified and performed five primary reverse total shoulder arthroplasties between 1 May 2019 and 1 June 2020. All patients were contactable and available for analysis. Assessment of functional outcomes was performed using the Constant-Murley score, the patient satisfaction score (PSS), and imaging studies. The mean follow-up from operation to the time of reporting was 9.6 months (range, 3 to 14 months).

    Results: The median age for our patients was 58 years (±11.91). The most common indication for surgery was post-traumatic arthritis, followed by rotator cuff arthropathy and osteoarthritis. The mean Constant score improved from 9.0 pre-operatively to 52.3 post-operatively at a mean of 9.6 months. The majority of the patients were satisfied with the surgery as the post-operative range of motion, especially anterior elevation and abduction, improved in four of our patients and there were no short-term complications, for example, of infection or revisions, reported at the last follow-up.

    Conclusion: This study has shown that reverse total shoulder arthroplasty can yield good short-term outcomes for the treatment of complex shoulder problems in addition to cuff tear arthropathy. It should be considered a treatment for rotator cuff tears, severe arthritis and ≥ 3 parts proximal humeral fractures.

    Matched MeSH terms: Shoulder; Shoulder Fractures; Arthroplasty, Replacement, Shoulder
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