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Asst Prof Abd Razak Hamid Rahmatullah

Dr Hamid Rahmatullah Bin Abd Razak from Sengkang General Hospital

Asst Prof Abd Razak Hamid Rahmatullah

MBBS, GDFM, MRCS (Glasg), M Med (Ortho Surg), MFSTEd, FRCSEd (Ortho), FRCSGlasg (Tr & Orth), FAMS (Orth Surg)


Specialty: Orthopaedic Surgery

Conditions Treated by this Doctor:
General Orthopaedics, Hip and Knee Conditions, Knee - Knee Cap Injury, Knee Ligament Injuries (ACL, PCL, Multiligament), Knee Meniscus Injuries, Minimally Invasive Surgery (MIS), Osteoarthritis: Total Knee Replacement Surgery, Sports Injuries, Trauma.

Clinical Appointments

  • Consultant Department of Orthopaedic Surgery Sengkang General HospitalSengkang General Hospital
  • Consultant Orthopaedic Surgery Singapore General HospitalSingapore General Hospital


Dr Hamid Razak is a Consultant and an ex-Chief Resident in the specialty of Orthopaedic Surgery with the Singapore Health Services (SingHealth). He is currently practicing at Sengkang General Hospital. He graduated with a Bachelor in Medicine, Bachelor of Surgery (MBBS) in 2009. During his first two postgraduate years in Singapore General Hospital, he won the “SingHealth Outstanding House Officer Award” as well as the “SingHealth Outstanding Medical Officer Award”. Having disrupted from National Service to read medicine, Hamid was re-enlisted in 2010. He performed exceedingly well in the Medical Officer Cadet Course and was awarded the prestigious Sword of Merit. He was later appointed as the Officer Commanding of the Medical Response Force, a position usually helmed by regular serviceman. Dr Hamid subsequently was selected for further specialist training in the competitive specialty of Orthopaedic Surgery. He continued his specialty training after completing his National Service commitment.

Dr Hamid has won several awards while in training. He was awarded the “SingHealth Outstanding Resident Award” in 2014 for his exemplary work as a trainee. He was also awarded the “SingHealth Outstanding Educator Award” in 2015 and the “Singapore General Hospital Junior Doctor Teaching Award” in 2015 and 2016 for his dedication and commitment to teaching medical undergraduates. In his final year in residency, he won the "SingHealth Outstanding Resident Award", the "SingHealth Outstanding Educator Award" and the "SingHealth Outstanding Quality Improvement Project Award". He was also selected as one of the outstanding chief residents in SingHealth and graduated as the valedictorian in his year.

Dr Hamid takes a keen interest in clinical research too having already published over 60 articles in peer-reviewed medical journals. He completed an overseas research attachment pursuing translational research in biological treatment of early primary osteoarthritis at Imperial College London under the National Medical Research Council Research Training Fellowship from July 2019 to March 2020. He was concurrently also awarded the prestigious Lee Kuan Yew Postgraduate Scholarship. Dr Hamid hopes to translate what he finds in the laboratory seamlessly to surgical practice and innovation.

Dr Hamid also completed a fellowship with the internationally renowned joint preservation surgeon, Prof Adrian Wilson at the London Knee Osteotomy Centre, United Kingdom from July 2019 to March 2020. Under the tutelage of Prof Adrian Wilson, Dr Hamid furthered his surgical skills in joint preservation procedures such as complex osteotomies as well as multiligament surgery of the knee. Having returned to Singapore after an enriching time in the United Kingdom, Dr Hamid is committed to pushing the frontiers in joint preserving surgery, especially in young patients with arthritis.


  • ​Yong Loo Lin School of Medicine, NUS, MBBS (2009)

  • Royal College of Physicians and Surgeons of Glasgow, MRCS (2012)

  • National University of Singapore, Graduate Diploma of Family Medicine (2013)

  • International Olympic Committee, Diploma in Sports Medicine (2015)

  • National University of Singapore, Masters in Medicine of Orthopaedic Surgery (2018)

  • Royal College of Surgeons of Edinburgh, FRCSEd (Orth), Fellowship (2018)

  • Royal College of Physicians and Surgeons of Glasgow, FRCSGlasg (Tr & Orth), Fellowship (2018)

  • Academy of Medicine Singapore, Fellowship (2018)

Professional Appointments and Committee Memberships

  • Assistant Professor, Duke-NUS Medical School
  • Clinician Faculty, Yong Loo Lin School of Medicine (NUS)
  • Clinical Tutor, Lee Kong Chian School of Medicine (NTU)
  • Member, Young Professionals Task Force, International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS)
  • Faculty, SingHealth Residency PGY-1 Programme
  • Executive Committee, SKH Junior Doctors Well-being Committee
  • Member, External Placement Review Board (Ministry of Home Affairs)
  • Advisory Board Member, Exercise is Medicine Singapore


  • National Medical Research Council Research Training Fellowship, 2019

  • Lee Kuan Yew Postgraduate Scholarship, 2019

  • SingHealth Residency Outstanding Faculty Award, 2019

  • Singapore Youth Award, 2018

  • ​Valedictorian, SingHealth Residency Graduating Cohort of 2018

  • SingHealth Residency Outstanding Quality Improvement Project Award, 2018

  • SingHealth Residency Inspiring Resident-Educator Award, 2018

  • SingHealth Residency Outstanding Resident Award, 2018

  • Valedictorian, Singapore Chief Residency Program (SCRP), 2017

  • NUS YLLSOM Junior Doctor Teaching Award, 2016

  • SingHealth Publish! Award, 2016

  • SingHealth Residency Inspiring Resident-Educator Award, 2015

  • NUS YLLSOM Junior Doctor Teaching Award, 2015

  • SingHealth Residency Inspiring Resident-Educator Award, 2014

  • SingHealth Best House Officer Award, 2010

  • SGH Best House Officer in Orthopaedic Surgery, 2009

  • Certificate of Commendation for Community Medicine Patient Study Module, 2007

Research Interests



  1. Outcomes of surgically treated fingertip injuries in migrant workers. Mak WK, Cheah JM, Chua DT, Bin Abd Razak HR. Ann Acad Med Singapore 2020 June.
  2. A rare presentation of a full-thickness rotator cuff tear with a confluent partial articular-sided tear. Wong KDOO, Bin Abd Razak HR. Cureus 2020 June.
  3. The strengths of one-, two-, and three-weave Pulvertaft tendon repairs. Choke A, Rung WY, McGrouther DA, Bin Abd Razak HR. J Hand Surg Eur Vol. 2020 May.
  4. Routine preoperative group crossmatching and postoperative check haemoglobin is not necessary in patients undergoing total knee arthroplasty. Tay AYW, Thever Y, Bin Abd Razak HR, Hao Y, Tan AHC. J Knee Surg 2020 Apr.
  5. Arthroscopic procedures could delay the need for a subsequent knee arthroplasty in older patients with end-stage osteoarthritis. Phua JK, Bin Abd Razak HR, Mitra AK. J Orthop Surg (Hong Kong) 2020 Apr.
  6. An anatomical and biomechanical assessment of the interosseous membrane of the cadaveric forearm. Bin Abd Razak HR, Andy Yew KS, Bin Mohd Moideen IS, Kenny Tay XK, Howe TS, Joyce Koh SB. J Hand Surg Eur Vol 2020 May.
  7. Patterns of weight change and their effects on clinical outcomes following total knee arthroplasty in an Asian population. Razzaki T, Mak WK, Bin Abd Razak HR, Tan HA. J Arthroplasty 2020 Feb.
  8. Role of adipose-derived stem cells in osteoarthritis. Bin Abd Razak HR, Heidari N, Wilson AJ. Asian J Arthrosc 2019 Dec.
  9. Periprosthetic fractures after total knee arthroplasty: the influence of pre-operative mechanical factors versus intraoperative factors. Zainul-Abidin S, Lim B, Bin Abd Razak HR, Gatot C, Allen JC, Koh J, Howe TS. Malay Orthop J 2019 Jul.
  10. Which patients require a contralateral total knee arthroplasty within 5 years of index surgery? Mak WK, Bin Abd Razak HR, Tan HA. J Knee Surg 2019 Jul.
  11. Satisfaction rates are low following revision total knee arthroplasty in Asians despite improvements in patient-reported oouotcome measures. Bin Abd Razak HR, Lee JHM, Tan SM, Chong HC, Lo NN, Yeo SJ. J Knee Surg 2019 Jul.
  12. Diabetes mellitus does not negatively impact outcomes and satisfaction following unicompartmental knee arthroplasty in well-controlled disease. Law GW, Bin Abd Razak HR, Goh GS, Wong KC, Chong HC, Lo NN, Yeo SJ. Asia Pac J Sports Med Arthrosc Rehabil Technol 2019 Jan.
  13. Duration of physical activity, sitting, sleep and the risk of total knee replacement among Chinese in Singapore, the Singapore Chinese Health Study.  Leung YY, Bin Abd Razak HR, Talaei M, Ang LW, Yuan JM, Koh WP. PLoS One 2018 Sep.
  14. Acceptable functional outcomes and patient satisfaction following total knee arthroplasty in Asians with severe knee stiffness: a matched analysis. Polascik BW, Bin Abd Razak HR, Chong HC, Lo NN, Yeo SJ. Clin Orthop Surg 2018 Sep.
  15. A comparative study of anterior cruciate ligament reconstruction with double, single or selective bundle techniques. Chia ZY, Chee JN, Bin Abd Razak HR, Lie DT, Chang PC. J Orthop Surg (Hong Kong) 2018 May-Aug.
  16. Cervical pedicle screw instrumentation is more reliable with O-arm based 3D navigation: analysis of cervical pedicle screw placement accuracy with O-arm based 3D navigation.  Chachan S, Bin Abd Razak HR, Loo WL, Allen JC, Shree Kumar D. Eur Spine J 2018 Apr.
  17. Achieving minimum clinically important difference in oxford knee score and short-form-36 physical component summary is less likely with single-radius compared with multiradius total knee arthroplasty in Asians. Lee WC, Bin Abd Razak HR, Allen JC, Chong HC, Tan HCA. J Knee Surg 2018 Apr.
  18. Protocol for a single-centre prospective observational study of postoperative delirium following total joint arthroplasties among South East Asians.  Abdullah HR, Tan SR, Lee SJ, HR Bin Abd Razak, Seet RH, Ying H, Sethi E, Sim EY. BMJ Open 2018;8(3):e019426.
  19. Early functional, radiological outcomes and satisfaction rates of total ankle arthroplasty in an Asian population. Tan SM, Bin Abd Razak HR, Sing Rikhraj I. Foot Ankle Spec 2018 Jan.
  20. Short-term outcomes of arthroscopic TightRope® fixation are better than hook plate fixation in acute unstable acromioclavicular joint dislocations.  Bin Abd Razak HR, Yeo EN, Yeo W, Lie TD. Eur J Orthop Sug Traumatol 2017 Dec 9.
  21. Bin Abd Razak HR, Acharyya S, Tan SM, Pang HN, Tay DK, Chia SL, Lo NN, Yeo SJ. Clin Orthop Surg 2017;9(4):432–438.
  22. Extradural hemangiomas mimicking a dumbbell nerve sheath tumour in the thoracolumbar spine: case report.  Chachan S, Bin Abd Razak HR, Loo WL, Tan CS, Dinesh SK. Surg Neurol Int 2018;8:244.
  23. Unicompartmental knee arthroplasty achieves greater flexion with no difference in functional outcome, quality of life and satisfaction versus total knee arthroplasty in patients younger than 55 years. A propensity score-matched cohort analysis.  Goh GS, Bin Abd Razak HR, Tay DK, Chia SL, Lo NN, Yeo SJ. J Arthroplasty 2018;33(2):355–361.
  24. Incidence of postoperative delirium in patients undergoing total knee arthroplasty – an Asian perspective. Huang J, Bin Abd Razak HR, Yeo SJ. Ann Transl Med 2017;5(16):321.
  25. Obesity is associated with poorer range of motion and Tegner scores following hamstring autograft anterior cruciate ligament reconstruction in Asians.  Bin Abd Razak HR, Chong HC, Tan HA. Ann Transl Med 2017;5(15):304.
  26. A rare case of massive rotator cuff tear and biceps tendon rupture with posterior shoulder dislocation in a young adult – surgical decision-making and outcome.  Soon EL, Bin Abd Razak HR, Tan AHC. J Orthop Case Rep 2017;7(2):82–86.
  27. Obesity does not affect outcomes in hybrid versus cemented total knee arthroplasty in Asians.  Ang JE, Bin Abd Razak HR, Howe TS, Tay BK, Yeo SJ. J Arthroplasty 2017;11(2):204–212.
  28. The role of isolated polyethylene exchange in total knee arthroplasty.  Pang HN, Bin Abd Razak HR, Petis S, Naudie DDR, MacDonald SJ. EFORT Open Rev 2017;2(3):66-71.
  29. Single-level minimally invasive transforaminal lumbar interbody fusion provides sustained improvements in clinical and radiological outcomes up to 5 years postoperatively in patients with neurogenic symptoms secondary to spondylolisthesis.  Bin Abd Razak HR, Dhoke P, Tay KS, Yeo W, Yue WM. Asian Spine J 2017;11(2):204-212.
  30. What are the preoperative outcome measures that predispose to periprosthetic fractures after primary total knee arthroplasty?  Lim JB, Bin Abd Razak HR, Zainul-Abidin S, Allen JC, Koh JS, Howe TS. J Arthroplasty 2017;32(8):2531–2534.
  31. Epidemiology of surgically managed anterior cruciate ligament ruptures in a sports surgery practice.  Sayampanathan AA, Howe BK, Bin Abd Razak HR, Chi CH, Tan AH. J Orthop Surg (Hong Kong) 2017;25(1):2309499016684289.
  32. Cartilage delamination flap mimicking a torn medial meniscus.  Jonathan GZ, Bin Abd Razak HR, Amit Kanta M. Case Rep Orthop 2016;2016:7062129.
  33. Improvement in healthrelated quality of life after unilateral total knee arthroplasty in patients with bilateral knee osteoarthritis.  Thiam D, Teh DJ, Bin Abd Razak HR, Tan AH. J Orthop Surg (Hong Kong) 2016;24(3):294-297.
  34. P-hacking in orthopaedic literature: a twist to the tail.  Bin Abd Razak HR, Ang JE, Attal H, Howe TS, Allen JC. J Bone Joint Surg Am 2016;98(20):e91.
  35. Prevalence of venous thromboembolic events is low in Asians after total knee arthroplasty without chemoprophylaxis.  Bin Abd Razak HR, Binte Abd Razak NF, Tan HA. J Arthroplasty 2017;32(3):974-979.
  36. Patient-reported outcomes, quality of life, and satisfaction rates in young patients aged 50 years or younger after total knee arthroplasty.  Goh GS, Liow MH, Bin Abd Razak HR, Tay DK, Lo NN, Yeo SJ. J Arthroplasty 2017;32(2):419-425.
  37. Intraoperative measurements of joint line changes using computer navigation do not correlate with postoperative radiographic measurements in total knee arthroplasty.  Goh GS, Bin Abd Razak HR, Tan JY, Yeo SJ. J Arthroplasty 2017;32(1):61-65.
  38. Injury patterns in patients presenting with a recurrent anterior cruciate ligament tear following primary reconstruction.  Koh BT, Sayampanathan AA, Bin Abd Razak HR, Chong HC, Tan HC. Ann Transl Med 2016;4(12):232.
  39. Obesity and venous thromboembolism in total knee arthroplasty patients in an Asian population.  Tay K, Bin Abd Razak HR, Tan AH. J Arthroplasty 2016;31(12):2880-2883.
  40. Preoperative haemoglobin cut-off values for the prediction of post-operative transfusion in total knee arthroplasty.  Yeh JZ, Chen JY, Bin Abd Razak HR, Loh BH, Hao Y, Yew AK, Chia SL, Lo NN, Yeo SJ. Knee Surg Sports Traumatol Arthrosc 2016;24(10):3293-3298.
  41. The influence of body mass index on functional outcome and quality of life after total knee arthroplasty. Chen JY, Lo NN, Chong HC, Bin Abd Razak HR, Pang HN, Tay DK, Chia SL, Yeo SJ.  Bone Joint J 2016;98-B(6):780-785.
  42. Age and preoperative knee society score are significant predictors of outcomes among Asians following total knee arthroplasty.  Bin Abd Razak HR, Tan CS, Chen YJ, Pang HN, Tay KJ, Chin PL, Chia SL, Lo NN, Yeo SJ. J Bone Joint Surg Am 2016;98(9):735-741.
  43. Factors affecting wear of constrained polyethylene tibial inserts in total knee arthroplasty.  Pang HN, Bin Abd Razak HR, Jamiecson P, Teeter MG, Naudie DD, MacDonald SJ. J Arthroplasty 2016;31(6):1340-1345.
  44. Meeting patient expectations and ensuring satisfaction in total knee arthroplasty.  Bin Abd Razak HR, Yeo SJ. Ann Transl Med 2015;3(20):315.
  45. Functional outcomes of the second surgery are similar to the first in Asians undergoing staged-bilateral total knee arthroplasty.  Kumar V, Bin Abd Razak HR, Chong HC, Tan AH. Ann Acad Med Singapore 2015;44(11):514-518. 
  46. Correlations between functional knee outcomes and health-related quality of life after total knee arthroplasty in an Asian population.  Thiam WD, Teh JW, Bin Abd Razak HR, Tan HC. J Arthroplasty 2016;31(5):989-993.
  47. Radiographic grading of the patellofemoral joint is more accurate in skyline compared to lateral views.  Heng HY, Bin Abd Razak HR, Mitra AK. Ann Transl Med 2015;3(18):263.
  48. Diagnosis of ligamentous and meniscal pathologies in patients with anterior cruciate ligament injury: comparison of magnetic resonance imaging and arthroscopic findings.  Bin Abd Razak HR, Sayampanathan AA, Koh TH, Tan HC. Ann Transl Med 2015;3(17):243.
  49. Outcomes are favorable in Asian patients undergoing deltoid-on open rotator cuff repair without acromioplasty.  Lim WA, Bin Abd Razak HR, Lim LW, Dhanaraj ID, Sedeek Mosaid SM, Tan HC. J Orthop 2015;12(3):126-129.
  50. Irreducible dislocation of the great toe interphalangeal joint secondary to an incarcerated sesamoid.  Bin Abd Razak HR, Chia ZY, Tan HC. Case Rep Orthop 2015;2015:231685.
  51. No gender-based differences in outcomes after conventional total knee arthroplasty in Asians.  Gen LY, Bin Abd Razak HR, Chi CH, Chye TH. J Arthroplasty 2015;30(9):1548-1550.
  52. Postoperative delirium in patients undergoing total joint arthroplasty: a systematic review.  Bin Abd Razak HR, Yung WY. J Arthroplasty 2015;30(8):1414-1417.
  53. First-time anterior shoulder dislocations: should they be arthroscopically stabilised?  Sedeek SM, Bin Abd Razak HR, Ee GW, Tan AH. Singapore Med J 2014;55(10):511-515.
  54. Outcomes are favorable after arthroscopic treatment of osteochondritis dissecans of the talus.  Goh GS, Bin Abd Razak HR, Mitra AK. J Foot Ankle Surg 2015;54(1):57-60.
  55. Correlation between radiographic and arthroscopic findings in Asian osteoarthritic knees.  Bin Abd Razak HR, Heng HY, Cheng KY, Mitra AK. J Orthop Surg (Hong Kong) 2014;22(2):155-157.
  56. Postoperative range of motion does not correlate with patient reported outcome scores in Asians after total knee arthroplasty.  Soon EL, Bin Abd Razak HR, Tan CS, Tan HC. J Arthroplasty 2014;29(12):2285-8.
  57. Total knee arthroplasty in Asian subjects: preoperative range of motion determines postoperative range of motion?  Bin Abd Razak HR, Han XA, Chong HC, Tan HC. Orthop Surg 2014;6(1):33-37.
  58. Computer navigation results in less severe flexion contracture following total knee arthroplasty.  Bin Abd Razak HR, Yeo Jin S, Chong Chi H. J Arthroplasty 2014;29(12):2369-2372.
  59. Generalized ligamentous laxity may be a predisposing factor for musculoskeletal injuries.  Bin Abd Razak HR, Bin Ali N, Howe TS. J Sci Med Sport 2014;17(5):474-478.
  60. The use of pneumatic tourniquets is safe in Asians undergoing total knee arthroplasty without anticoagulation.  Bin Abd Razak HR, Tan HC. Knee 2014;21(1):176-179.
  61. Preoperative patient characteristics and outcomes of total knee arthroplasty in a multiethnic Asian population stratified by ethnicity.  Jiang L, Bin Abd Razak HR, Chong HC, Tan A. J Arthroplasty 2014;29(2):304-307.
  62. The truth behind subchondral cysts in osteoarthritis of the knee. Audrey HX, Bin Abd Razak HR, Andrew TH. Open Orthop J 2014 Jan 24;8:7-10.
  63. Health care subsidy and outcomes of total knee arthroplasty in Asians.  Bin Abd Razak HR, Xiang TR, Chi CH, Andrew TH. Orthopedics 2013;36(6):e735-740.
  64. Joint line changes in cruciate-retaining versus posterior-stabilized computer-navigated total knee arthroplasty.  Bin Abd Razak HR, Pang HN, Yeo SJ, Tan MH, Lo NN, Chong HC. Arch Orthop Trauma Surg 2013;133(6):853-859.
  65. Surgically treated cervical myelopathy: a functional outcome comparison study between multilevel anterior cervical decompression fusion with instrumentation and posterior laminoplasty.  Seng C, Tow BP, Siddiqui MA, Srivastava A, Wang L, Yew AK, Yeo W, Khoo SH, Balakrishnan NM, Bin Abd Razak HR, Chen JL, Guo CM, Tan SB, Yue WM. Spine J 2013;13(7):723-731.
  66. Obesity does not imply poor outcomes in Asians after total knee arthroplasty.  Bin Abd Razak HR, Chong HC, Tan AH. Clin Orthop Relat Res 2013;471(6):1957-1963.
  67. Incidence of clinically significant venous thromboembolic events in Asian patients undergoing total knee arthroplasty without anticoagulation.  Bin Abd Razak HR, Soon AT, Dhanaraj ID, Tan AH. J Arthroplasty 2012;27(6):1128-1132.

Research Trials