Imperial College London

DrMiladMasjedi

Faculty of MedicineDepartment of Surgery & Cancer

Honorary Research Fellow
 
 
 
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Contact

 

+44 (0)20 3313 8833m.masjedi

 
 
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Location

 

7L16East WingCharing Cross Campus

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Summary

 

Publications

Publication Type
Year
to

49 results found

Karia M, Masjedi M, Duffell L, Kotti M, McGregor Aet al., 2018, Comparison of gait biomechanics in patients with and without knee osteoarthritis during different phases of gait, Journal of Orthopaedics, Trauma and Rehabilitation, Vol: 25, Pages: 11-15, ISSN: 2210-4917

Background: This study aimed to characterise knee adduction angles (KAA) and knee adduction moments (KAM) and compare this with foot centre of pressure (COP) in volunteers with and without knee osteoarthritis (OA). Methods: A total of 108 participants were recruited; 84 had no known pathology, 18 had medial knee OA, and six had lateral knee OA. Linear regression was used to determine correlations between the normalised COP, KAM, and KAA during each phase of gait for all participants. Results: The first phase of gait demonstrated significant differences between groups for all measures: KAA in all phases, COP in phases one and two, and KAM in phase one only. Conclusion: The largest mechanical changes are seen in the first phase of gait in osteoarthritic patients. Although COP is an easy to measure tool, it is not as sensitive as KAA and did not demonstrate a significant difference between healthy and medial OA patients.

Journal article

Aqil A, Wiik A, Zanotto M, Manning V, Masjedi M, Cobb JPet al., 2016, The Effect of Hip Arthroplasty on Osteoarthritic Gait: A Blinded, Prospective and Controlled Gait Study at Fast Walking Speeds, JOURNAL OF ARTHROPLASTY, Vol: 31, Pages: 2337-2341, ISSN: 0883-5403

Journal article

Masjedi M, Mandalia R, Aqil A, Cobb Jet al., 2016, Validation of the 'FeMorph' software in planning cam osteochondroplasty by incorporating labral morphology, COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING, Vol: 19, Pages: 67-73, ISSN: 1025-5842

Journal article

Aqil A, Wiik A, Clarke S, Masjedi M, Cobb Jet al., 2015, Resurfacing head size and femoral fracture: Are registry conclusions on head size justified?, Eur J Orthop Surg Traumatol, Vol: 25, Pages: 1301-1305, ISSN: 1633-8065

BACKGROUND: Joint registries report that peri-prosthetic fractures are the most common reason for early revision of a hip resurfacing arthroplasty (HRA) and are twice as likely with small implant sizes. However, a national survey found peri-prosthetic fracture to be strongly associated with surgical accuracy. We therefore asked whether the force required to induce a peri-prosthetic fracture: (1) was significantly lower when using smaller implants and (2) correlated to the size of implant used, when surgery was performed accurately. METHODS: To ensure an adequate power, we calculated our sample size from pilot data. Forty-four femurs were tested in two experiments. The first experiment tested femurs with either a small (48 mm) or a large (54 mm) HRA implant. The second involved testing femurs with a range of implant sizes. A rapid prototyped femur-specific guide ensured accurate implantation. Specimens were then vertically loaded in a servo-hydraulic testing machine till fracture. Displacement (mm) and force (N) required for fracture were recorded. RESULTS: A median force of 1081 N was required to fracture specimens implanted with small 48-mm heads, while 1134 N was required when a 54-mm head was used (U = 77, z = -0.054, p = 0.957). Implant head size and force required to fracture were not related, r = 0.12, p = 0.63. CONCLUSIONS: The force required to induce a resurfacing peri-prosthetic fracture was not related to the size of the implant. The increased failure rate seen in all registries is unlikely to be directly the result of this single variable. Correctly performed resurfacing arthroplasty is highly resistant to fracture.

Journal article

Aqil A, Sheikh HQ, Masjedi M, Jeffers J, Cobb Jet al., 2015, Birmingham Mid-Head Resection Periprosthetic Fracture., CiOS Clinics in Orthopedic Surgery, Vol: 7, Pages: 402-405, ISSN: 2005-4408

Total hip arthroplasty in the young leads to difficult choices in implant selection. Until recently bone conserving options were not available for younger patients with deficient femoral head bone stock. The novel Birmingham Mid-Head Resection (BMHR) device offers the option of bone conserving arthroplasty in spite of deficient femoral head bone stock. Femoral neck fracture is a known complication of standard resurfacing arthroplasty and is the most common reason for revision. It is unknown whether this remains to be the case for the BMHR neck preserving implants. We report a case of a 57-year-old male, who sustained a periprosthetic fracture following surgery with a BMHR arthroplasty. This paper illustrates the first reported case of a BMHR periprosthetic fracture. The fracture pattern is spiral in nature and reaches to the subtrochanteric area. This fracture pattern is different from published cadaveric studies, and clinicians using this implant should be aware of this as revision is likely to require a distally fitting, rather than a metaphyseal fitting stem. We have illustrated the surgical technique to manage this rare complication.

Journal article

Nigam C, Masjedi M, Houston J, Marquardt C, Aqil A, Cobb Jet al., 2014, Does cam osteochondroplasty compromise proximal femur strength?, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, Vol: 228, Pages: 1235-1240, ISSN: 0954-4119

Journal article

Duffell LD, Mushtaq J, Masjedi M, Cobb JPet al., 2014, The knee adduction angle of the osteo-arthritic knee: A comparison of 3D supine, static and dynamic alignment, KNEE, Vol: 21, Pages: 1096-1100, ISSN: 0968-0160

Journal article

Jaffry Z, Masjedi M, Clarke S, Harris S, Karia M, Andrews B, Cobb Jet al., 2013, Unicompartmental knee arthroplasties: Robot vs. patient specific instrumentation, The Knee

Journal article

Masjedi M, Tay C, Harris S, Cobb Jet al., 2013, A Local Reference Frame for Describing the Proximal Human Femur; Application inclinical settings, Skeletal Radiology

Journal article

Masjedi M, Tan WL, Sunnar J, Harris S, Aqil A, Cobb Jet al., 2013, Use of robotic technology in cam type osteochndroplasty, ISTA

Conference paper

Masjedi M, Harris S, Cobb J, 2013, A novel and improved design of femoral prosthesis., ISTA

Conference paper

Prinold JAI, Masjedi M, Johnson GR, Bull AMJet al., 2013, Musculoskeletal shoulder models: A technical review and proposals for research foci, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, Vol: 227, Pages: 1041-1057, ISSN: 0954-4119

Journal article

Masjedi M, Jaffry Z, Harris S, Cobb Jet al., 2013, Protocol for Evaluation of Robotic Technology in Orthopedic Surgery, Advances in Orthopedics, Vol: 2013

Journal article

Masjedi M, Duffell LD, 2013, Dynamic analysis of the upper limb during activities of daily living: Comparison of methodologies, Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine

Journal article

Masjedi M, Tay C, Harris S, Cobb Jet al., 2013, Proximal femoral frame: Application in cam femoroacetabular surgery., ISB

Conference paper

Masjedi M, Tan WL, Sunnar J, Harris S, Aqil A, Cobb Jet al., 2013, Use of robotic technology in cam femoroacetabular impingement corrective surgery, ISB

Conference paper

Tay C, Masjedi M, Cobb J, 2013, A local reference frame for the proximal femur, EFORT

Conference paper

Masjedi M, Nightingale C, Azimi D, Cobb Jet al., 2013, Three dimensional relationship between acetabular rim morphology and femoral cam severity, EFORT

Conference paper

Masjedi M, Tan WL, Sunnar A, Aqil A, Harris S, Cobb Jet al., 2013, Use of robotic technology in cam femoroacetabular impingement corrective surgery, EFORT

Conference paper

Jaffry Z, Masjedi M, Clark S, Andrews B, Harris S, Karia M, Cobb Jet al., 2013, Improving the accuracy of unicompartmental knee arthroplasties: Robot vs. Patient Specific Instrumentation, BASK

Conference paper

Masjedi M, Aqil A, Tan WL, Sunnar J, Harris S, Cobb Jet al., 2013, Use of robotic technology in cam femoroacetabular impingement corrective surgery, BHS

Conference paper

Karia M, Andrews B, Masjedi M, Jaffry Z, Cobb Jet al., 2013, Robotic assistance enables inexperienced surgeons to perform unicompartmental knee arthroplasty 'right first time', BASK

Conference paper

Masjedi M, Nightingale C, Azimi D, Cobb Jet al., 2013, The three-dimensional relationship between acetabular rim morphology and the severity of femoral cam lesions, The Bone & Joint Journal, Vol: 95-B, Pages: 314-319

Journal article

Aqil A, Drabu R, Bergmann J, Masjedi M, Manning V, Andrews B, Muirhead- Allwood S, Cobb Jet al., 2013, The Gait Of Patients With One Resurfacing And One Replacement Hip: A Single Blinded Controlled Study, International Orthopaedics

Journal article

Masjedi M, Tan WL, Sunnar J, Aqil A, Harris S, Cobb Jet al., 2012, Use of robotic technology in cam femoroacetabular impingement corrective surgery, International Journal of Medical Robotics and Computer Assisted Surgery

Journal article

Masjedi M, Marquardt CS, Drummond IMH, Harris JS, Cobb JPet al., 2012, Cam type femoro-acetabular impingement: quantifying the diagnosis using three dimensional head-neck ratios, Skeletal Radiology, Vol: 42, Pages: 329-33

Journal article

Masjedi M, Azimi D, Nightingale C, Davda K, Cobb Jet al., 2012, A 3-D Alpha angle, an improved method to quantify and plan cam hip surgery, Orthopaedic Research Society

Conference paper

Marquardt C, Masjedi M, Drummond I, Cobb Jet al., 2012, Diagnosis of Cam-type Impingement Using Three-Dimensional Head-Neck Ratios, ORS

Conference paper

Masjedi M, Azimi D, Nightingale C, Harris S, Cobb Jet al., 2012, A method of assessing the severity of cam type femoro-acetabular impingement in three dimensions., Hip International., Vol: 22, Pages: 677-82

Journal article

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