Displaying publications 81 - 100 of 113 in total

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  1. Shalimar A, Sharaf I, Farah Wahida I, Ruszymah BH
    J Orthop Surg (Hong Kong), 2007 Dec;15(3):357-60.
    PMID: 18162686 DOI: 10.1177/230949900701500323
    A Malaysian family with congenital insensitivity to pain with anhydrosis was diagnosed based on clinical symptoms of chronic ulcers, joint deformities, malunited fractures, anhydrosis, and learning disabilities. We detected a compound heterozygous mutation in exon 16: V709L from the mother and G718S from the father. Two novel mutations were identified: at amino acid 709, a change of G to C at nucleotide 2209 (approximately 2209G to C) causing a valine to leucine substitution (V709L), and at amino acid 718, a change of G to A at nucleotide 2236 (approximately 2236G to A) causing a glycine to serine substitution (G718S). Polymorphisms identified were at nucleotides approximately 2113G to C and approximately 2176T to C.
  2. Suppan VKL, Tew MM, Wong BC, Chan HK, Chew YW, Tan CS, et al.
    J Orthop Surg (Hong Kong), 2020 3 5;28(1):2309499019895029.
    PMID: 32129141 DOI: 10.1177/2309499019895029
    PURPOSE: A recent 3-month randomized, open-label controlled trial found that the intra-articular hyaluronic acid injection (GO-ON®) given as a single dose of 5 mL is as effective and safe as three repeated doses of 2.5 mL in patients with knee osteoarthritis. However, the information on the long-term efficacy and economic implications of the single-dose regimen is still limited. Hence, this follow-up study was designed to compare the effectiveness and costs of the two regimens 12 months following the treatment.

    METHODS: All the 127 patients, who received either three repeated doses (n = 64) or a single dose (n = 63) of GO-ON in the previous trial, were followed up in month 12 following the treatment. The effectiveness of both the regimens was assessed using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and the mean WOMAC scores were compared with those recorded at the baseline and in month 3. Additionally, the total treatment costs of the two regimens, taking account of both direct and indirect costs, were computed and compared.

    RESULTS: A total of 125 patients (98.4%) completed the assessment. Despite the reduction of the overall mean WOMAC score from 39.24 to 19.93 (p < 0.001) in the first 3 months following the treatment with GO-ON, no further changes were observed up to month 12 (p > 0.95). In the meantime, the two regimens did not differ in the mean WOMAC scores (p = 0.749) and in the subscale scores for pain (p = 0.970), stiffness (p = 0.526), and physical functioning (p = 0.667) in month 12. The cost for single-dose injection was found to be approximately 30% lower compared to the repeated doses.

    CONCLUSION: These findings indicate that the single larger dose of GO-ON is as effective as the repeated doses over 12 months, and yet the total treatment cost is lowered.

  3. Suppan VKL, Wei CY, Siong TC, Mei TM, Chern WB, Nanta Kumar VK, et al.
    J Orthop Surg (Hong Kong), 2017 9 28;25(3):2309499017731627.
    PMID: 28946838 DOI: 10.1177/2309499017731627
    BACKGROUND: Intra-articular hyaluronic acid (HA) injection is used in management of knee, hand and hip osteoarthritis. While HA injection is included in the list of evaluated therapies, its efficacy and optimum dosing still have no consensus. This study was conducted to explore the possibility of using single injection HA to increase patient convenience while maintaining the therapeutic efficacy.

    METHODS: We present a prospective, open label, non-blinded, randomized controlled trial performed in accordance with guidelines in principles of good clinical practice. Block randomization was done for patients to receive either single 5 ml GO-ON injection or the conventional three injections of 2.5 ml GO-ON at weekly interval. Baseline Western Ontario McMaster University Osteoarthritis (WOMAC) scores were evaluated and recorded. All subjects were re-evaluated at 3 months and the WOMAC score recorded again as primary end points. Data analyses were performed with IBM SPSS Statistics for Windows software (version 21.0, IBM Corp, Armonk, New York, USA).

    RESULTS: In the cohort of 127 patients, 33 were males and 94 females. The mean age was 59.1 years (standard deviation (SD) = 7.25) in single injection arm and 60.1 years (SD = 7.72) in triple injection arm. The two groups were recorded to have no significant difference in age ( p = 0.46) and Kellgren-Lawrence radiological grade ( p = 0.694). There was significant increase in the WOMAC scores from the baseline (pre-injection) to that recorded 3 months after injection ( p < 0.001) in patients of both groups. However, there was no statistically significant difference noticed in this clinical improvement between the two arms ( p = 0.889).

    CONCLUSION: The study shows single 5 ml dose regime comparing well with conventional three doses of 2.5 ml of intra-articular GO-ON HA injected at weekly intervals and confirms good efficacy, tolerability and safety of single larger dose of GO-ON knee intra-articular injection.
  4. Sulaiman AR, Nawaz H, Munajat I, Sallehudin AY
    J Orthop Surg (Hong Kong), 2007 Apr;15(1):84-6.
    PMID: 17429125
    We report a case of the Antley-Bixler syndrome in an 11-year-old girl. She presented with bilateral proximal femoral focal deficiency, right clubfoot, left radiohumeral synostosis, bilateral ear hypoplasia, cleft palate, tongue tie, missing teeth, congenital heart disease, a pelvic kidney with hydronephrosis, and mental retardation. Proximal femoral focal deficiency has never been reported before as a manifestation of Antley-Bixler syndrome. Her mother was exposed to radiation during an intravenous urogram done in the first trimester of pregnancy. Exposure to radiation has not been implicated as a cause of Antley-Bixler syndrome.
  5. Kamarul T, Mansor A, Robson N, Albusaidi SH, Suhaeb AM, Samsudin EZ
    J Orthop Surg (Hong Kong), 2018 1 13;26(1):2309499017749983.
    PMID: 29320962 DOI: 10.1177/2309499017749983
    PURPOSE: Worldwide advances in microsurgery have made salvaging of amputated hand via replantation and revascularization common procedures. The present study examines the outcome of these procedures in a tertiary hospital in Malaysia.

    METHODS: Patients with hand amputation who underwent replantation or revascularization from 2005 to 2012 were identified and reviewed for patient characteristics, amputation characteristics and survival rates. Successfully treated patients were interviewed to assess the functional outcome using Quick Disability of the Arm, Shoulder and Hand (Quick-DASH) questionnaire and Michigan Hand Outcome Questionnaire (MHQ). Statistical analysis was performed to evaluate outcome and elicit predictive factors.

    RESULTS: Fifty-five patients were enrolled: 37 (67.3%) underwent replantation and 18 (32.7%) underwent revascularization. The overall success rate of 78% ( n = 43) was within the range of previously reported data (61.6% to 96.0%). Ischaemic time <6 h provided significantly better survival rates ( p < 0.05). Functional outcomes were successfully assessed in 34 patients (79%), at a mean follow-up of 40 months (range 11-93 months). The overall Quick-DASH and MHQ scores were 42.82 ± 23.69 and 60.94 ± 12.82, respectively. No previous reports of functional outcome were available for comparison. Both Quick-DASH ( p = 0.001) and MHQ scores ( p < 0.001) were significantly higher for finger injuries, followed by thumb, wrist and palm injuries.

    CONCLUSION: Ischaemic time and level of injury are important predictors of success rate of replantation and revascularization of amputated upper limb appendages.

  6. Ajit Singh V, Ho SC, Abdul Rashid ML, Santharalinggam RD
    J Orthop Surg (Hong Kong), 2023;31(3):10225536231208242.
    PMID: 37824849 DOI: 10.1177/10225536231208242
    BACKGROUND: Clavicle fractures are traditionally treated non-operatively. This study determines the functional outcome of midshaft clavicle fractures treated non-operatively, the factors influencing it, and the incidence of acromioclavicular joint (ACJ) arthrosis.

    METHODS: Patients with midshaft clavicular fractures treated non-operatively between 16 and 50 years old with no prior AC joint problems were assessed. Demographics, hand dominance, type of occupation, and smoking status were documented. Functional scoring using DASH score, CM score, and radiological evaluation was done with special tests to diagnose AC joint arthrosis. Two or more positive special tests were considered significant for this study.

    RESULTS: 101 patients were recruited, 83 male and 18 female patients. The average age of 34.7 ± 13.93 years. The average follow-up was 32.7 months (range: 24-75; SD ± 9.9 months). 48.5% were blue-collar workers, and 60.4% involved the dominant upper limb. 44.6% were cigarette smokers. There was 20 mm and more shortening in 21.8% of subjects. 40.6% had a significant special test, and 36.6% had radiological changes of AC joint osteoarthritis. Positive two or more special tests were significantly associated with radiological evidence of arthrosis (p = .00). The mean DASH score was 28.28 ± 17.4, and the mean CM score was 27.58 ± 14.34. Most have satisfactory to excellent scores. Hand dominance, smoking, and blue-collar work were significantly associated with poorer CM scores, and hand dominance was significant for Dash scores.

    CONCLUSION: There is an equal distribution poor, satisfactory and excellent functional outcomes in patients with midshaft clavicle fractures treated non-operatively. The poor outcomes may be attributed to ACJ arthrosis. Hand dominance, smoking and blue-collar work affected the functional outcome. Shortening of the clavicle had no bearing on the clinical and radiological findings of osteoarthritis and functional scores. The presence of two or more positive special tests is an accurate predictor of AC joint arthritis.

  7. Saw A, Chua YP, Hossain G, Sengupta S
    J Orthop Surg (Hong Kong), 2012 Aug;20(2):181-4.
    PMID: 22933675
    To assess the monthly rates of infection of individual pin sites in 7 patients during distraction osteogenesis.
  8. Naidu SV, Sengupta S
    J Orthop Surg (Hong Kong), 2005 Apr;13(1):3-7.
    PMID: 15872394
    To predict healing of the stump by assessing the microscopic vascular changes at the amputation site.
  9. Foead A, Penafort R, Saw A, Sengupta S
    J Orthop Surg (Hong Kong), 2004 Jun;12(1):76-82.
    PMID: 15237126
    To conduct a prospective randomised controlled study to compare the stability and risk of nerve injury between fractures treated by medial-lateral pin fixation and those treated by 2-lateral pin fixation.
  10. Saw A, Phang ZH, Alrasheed MK, Gunalan R, Albaker MZ, Shanmugam R
    J Orthop Surg (Hong Kong), 2019 9 19;27(3):2309499019873987.
    PMID: 31530084 DOI: 10.1177/2309499019873987
    PURPOSE: Management of Blount disease in adolescents and young adults is complex and associated with high risk of morbidities. Gradual correction with external fixator can minimize soft tissue injury and allow subsequent adjustment in degree of correction. This study investigates the surgical outcome and complication rate of gradual correction of neglected Blount disease through single-level extra-articular corticotomy.

    METHODS: Patients treated for Blount disease using external fixator from 2002 to 2016 were recruited for the study. We used Ilizarov and Taylor Spatial Frame (TSF) external fixator to perform simultaneous correction of all the metaphyseal deformities without elevating the tibia plateau. Surgical outcome was evaluated using mechanical axis deviation (MAD), tibial femoral angle (TFA), and femoral condyle tibial shaft angle (FCTSA).

    RESULTS: A total of 22 patients with 32 tibias have been recruited for the study. The mean MAD improved from 95 ± 51.4 mm to 9.0 ± 37.7 mm (medial to midpoint of the knee), mean TFA improved from 31 ± 15° varus to 2 ± 14° valgus, and mean FCTSA improved from 53 ± 14° to 86 ± 14°. Mean duration of frame application is 9.4 months. Two patients developed pathological fractures over the distracted bones, one developed delayed consolidation and other developed overcorrection.

    CONCLUSIONS: Correction of Blount disease can be achieved by gradual correction using Ilizarov or TSF external fixator with low risk of soft tissue complication. Longer duration of frame application should be considered to reduce the risk of pathological fracture or subsequent deformation of the corrected bone.

  11. Singh C, Ibrahim S, Pang KS, Shanti S
    J Orthop Surg (Hong Kong), 2003 Jun;11(1):94-6.
    PMID: 12810979
    We report a case of a 13-year-old girl with an osteosarcoma of the right humerus, which had been diagnosed as an aneurysmal bone cyst at our institution. She underwent curettage and bone grafting of the lesion, which resulted in implantation metastasis of the tumour to the ilium. She died 15 months after presentation owing to pulmonary metastases. This report highlights the possibility of metastasis occurring by direct implantation to a graft donor site. We strongly recommend that a biopsy be performed in cases of presumed benign lesions before proceeding with the definitive surgery.
  12. Ajit Singh V, Chun Haw B, Haseeb A, Shuan Ju Teh C
    J Orthop Surg (Hong Kong), 2019 4 5;27(2):2309499019839616.
    PMID: 30943842 DOI: 10.1177/2309499019839616
    PURPOSE:: Arthroplasty-related infection has grown worldwide. Revision procedures for infection are associated with longer operating time, superior amounts of blood loss, and substantial economic encumbrance. To overcome cost, many surgeons opt for hand-mixed vancomycin into the bone cement. The objective of this research was to assess the biomechanical strength and antibacterial properties of hand-mixed vancomycin bone cement at different concentrations with commonly used industrial preblended antibiotic bone cement and plain cement. The target was to determine the ideal concentration of antibiotics that can be used in the preparation of hand-mixed vancomycin cement that delivers maximum antibiotics concentration without compromising its biomechanical properties.

    MATERIALS AND METHODS:: Vancomycin-impregnated polymethyl methacrylate (PMMA) specimen was hand prepared in varying concentrations (1-4 g). The authors tested three-point bending strength to determine 'maximum bending load' and stiffness and its antibacterial activity by looking into the zone of inhibition on methicillin-resistant Staphylococcus aureus-impregnated agar plate. These were compared with the industrial preblended Simplex™ P with 1 g tobramycin.

    RESULTS:: This study exhibited that vancomycin-PMMA disk that contained higher concentration of antibiotics had significantly higher antibacterial activity. The control group (plain cement) and industrial PMMA with preblended antibiotic (tobramycin) showed stable mechanical strength, while the hand-mixed antibiotic cement (HMAC) had variable mechanical strength varying on the concentration of antibiotics used.

    CONCLUSION:: It was effectively concluded that HMAC is advantageous as a cement spacer; however, it is not recommended for primary arthroplasty and second-stage revision arthroplasty. The recommended maximum concentration of vancomycin based on this study is 2 g/pack (40 g) of cement. Industrial preblended antibiotic cement is superior to hand-mixed cement.

  13. Chiu CK, Singh VA
    J Orthop Surg (Hong Kong), 2009 Apr;17(1):119-22.
    PMID: 19398809
    We report a case of chronic recurrent multifocal osteomyelitis in a 9-year-old girl. She presented with a 9-month history of gradually worsening pain and swelling in her left foot. Non-steroidal anti-inflammatory drugs were prescribed but the symptoms persisted. She underwent curettage through a small oval corticotomy window on the first metatarsal bone. The pain and swelling improved promptly and she was able to walk without pain 2 weeks later. Curettage enabled rapid symptomatic relief and induced remission, with little risk of complications.
  14. Loh YC, Lam WL, Stanley JK, Soames RW
    J Orthop Surg (Hong Kong), 2004 Jun;12(1):83-6.
    PMID: 15237127 DOI: 10.1177/230949900401200115
    Radial tunnel syndrome refers to pain on the lateral aspect of the forearm as a result of compression of the posterior interosseous nerve within a tunnel with specific anatomical boundaries. Diagnosis of the condition is difficult because of its close association with lateral epicondylitis, which warrants different methods of treatment. Based on a cadaveric study, a new clinical test, the Rule-of-Nine test, is proposed to improve the diagnostic accuracy in radial tunnel syndrome. The test involves constructing 9 equal squares on the anterior aspect of the forearm and noting those squares where tenderness can be elicited.
  15. Yong CK, Choon DS, Soon HC
    J Orthop Surg (Hong Kong), 2008 Aug;16(2):197-200.
    PMID: 18725672
    To present midterm results of Duracon total knee arthroplasty (TKA) performed between 1991 and 2001.
  16. Teo PC, Kassim AY, Thevarajan K
    J Orthop Surg (Hong Kong), 2013 Dec;21(3):340-6.
    PMID: 24366797
    To propose a novel method to measure the neck shaft angle and anteversion of the femur using anteroposterior and 45-degree oblique radiographs.
  17. Sinha NK, Bhardwaj A, Sadashiva Rao A, Trivedy PD
    J Orthop Surg (Hong Kong), 2019 2 26;27(1):2309499018816450.
    PMID: 30798736 DOI: 10.1177/2309499018816450
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