Imperial College London

ProfessorAndrewAmis

Faculty of EngineeringDepartment of Mechanical Engineering

Professor
 
 
 
//

Contact

 

+44 (0)20 7594 7062a.amis

 
 
//

Assistant

 

Ms Fabienne Laperche +44 (0)20 7594 7033

 
//

Location

 

713City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

423 results found

Bull AMJ, Earnshaw PH, Smith A, Katchburian MV, Hassan ANA, Amis AAet al., 2002, Intraoperative measurement of knee kinematics in reconstruction of the anterior cruciate ligament, JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME, Vol: 84B, Pages: 1075-1081, ISSN: 0301-620X

JOURNAL ARTICLE

Bull AMJ, Earnshaw PH, Smith A, Katchburian MV, Hassan ANA, Amis AAet al., 2002, Intraoperative measurement of knee kinematics in reconstruction of the anterior cruciate ligament, Journal of Bone and Joint Surgery - Series B, Vol: 84, Pages: 1075-1081, ISSN: 0301-620X

Our objectives were to establish the envelope of passive movement and to demonstrate the kinematic behaviour of the knee during standard clinical tests before and after reconstruction of the anterior cruciate ligament (ACL). An electromagnetic device was used to measure movement of the joint during surgery. Reconstruction of the ACL significantly reduced the overall enveldpe of tibial rotation (10° to 90° flexion), moved this envelope into external rotation from 0° to 20° flexion, and reduced the anterior position of the tibial plateau (5° to 30° flexion) (p < 0.05 for all). During the pivot-shift test in early flexion there was progressive anterior tibial subluxation with internal rotation. These subluxations reversed suddenly around a mean position of 36 ± 9° of flexion of the knee and consisted of an external tibial rotation of 13 ± 8° combined with a posterior tibial translation of 12 ± 8 mm. This abnormal movement was abolished after reconstruction of the ACL.

JOURNAL ARTICLE

Bull AMJ, Katchburian MV, Shih YF, Amis AAet al., 2002, Standardisation of the description of patellofemoral motion and comparison between different techniques, KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, Vol: 10, Pages: 184-193, ISSN: 0942-2056

JOURNAL ARTICLE

Gupte CM, Smith A, Jamieson N, Bull AMJ, Thomas RD, Amis AAet al., 2002, Meniscofemoral ligaments-structural and material properties, JOURNAL OF BIOMECHANICS, Vol: 35, Pages: 1623-1629, ISSN: 0021-9290

JOURNAL ARTICLE

Gupte CM, Smith A, McDermott ID, Bull AMJ, Thomas RD, Amis AAet al., 2002, Meniscofemoral ligaments revisited - Anatomical study, age correlation and clinical implications, JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME, Vol: 84B, Pages: 846-851, ISSN: 0301-620X

JOURNAL ARTICLE

Gupte CM, Smith A, McDermott ID, Bull AMJ, Thomas RD, Amis AAet al., 2002, Meniscofemoral ligaments revisited, Journal of Bone and Joint Surgery - Series B, Vol: 84, Pages: 846-851, ISSN: 0301-620X

The meniscofemoral ligaments were studied in 84 fresh-frozen knees from 49 cadavers. Combined anterior and posterior approaches were used to identify the ligaments. In total, 78 specimens (93%) contained at least one meniscofemoral ligament. The anterior meniscofemoral ligament (aMFL) was present in 62 specimens (74%), and the posterior meniscofemoral ligament (pMFL) in 58 (69%). The 42 specimens (50%) in which both ligaments were present were from a significantly younger population than that with one MFL or none (p < 0.05). Several anatomical variations were identified, including oblique fibres of the posterior cruciate ligament (PCL), which were seen in 16 specimens (19%). These were termed the 'false pMFL'. The high incidence of MFLs and their anatomical variations should be borne in mind during arthroscopic and radiological examination of the PCL. It is important to recognise the oblique fibres of the PCL on MRI in order to avoid wrongly identifying them as either a pMFL or a tear of the lateral meniscus. The increased incidence of MFLs in younger donors suggests that they degenerate with age.

JOURNAL ARTICLE

Gupte C, Bull AMJ, Amis AA, 2002, The meniscofemoral ligament as a secondary restraint - a sheep study, Orthopaedic Research Society.Transactions of the Annual Meeting, Vol: 27, Pages: 908-908, ISSN: 0149-6433

JOURNAL ARTICLE

Post WR, Teitge R, Amis A, 2002, Patellofemoral malalignment: looking beyond the viewbox, CLINICS IN SPORTS MEDICINE, Vol: 21, Pages: 521-+, ISSN: 0278-5919

JOURNAL ARTICLE

Sanghera B, Amis A, McGurk M, 2002, Preliminary study of potential for rapid prototype and surface scanned radiotherapy facemask production technique, Journal of Medical Engineering and Technology, Vol: 26, Pages: 16-21, ISSN: 1464-522X

JOURNAL ARTICLE

Aichroth PM, Wolman R, Maunder T, Amis AA, Bull AMJ, Mahadevan Vet al., 2001, Sports injuries: the knee, London, Publisher: Primal Pictures, ISBN: 9781902470214

BOOK

Amis AA, 2001, Evaluating the healing of articular cartilage defects., J Bone Joint Surg Am, Vol: 83-A, Pages: 1591-1592, ISSN: 0021-9355

JOURNAL ARTICLE

Amis AA, 2001, Evaluating the healing of articular cartilage defects, JOURNAL OF BONE AND JOINT SURGERY-AMERICAN VOLUME, Vol: 83A, Pages: 1591-1591, ISSN: 0021-9355

JOURNAL ARTICLE

Amis AA, Jackson DW, Lalor PA, Aberman HM, Simon TMet al., 2001, Evaluating the healing of articular cartilage defects [5] (multiple letters), Journal of Bone and Joint Surgery - Series A, Vol: 83, Pages: 1591-1592, ISSN: 0021-9355

JOURNAL ARTICLE

Basso O, Johnson DP, Amis AA, 2001, The anatomy of the patellar tendon, KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, Vol: 9, Pages: 2-5, ISSN: 0942-2056

JOURNAL ARTICLE

Gibbons CER, Davies AJ, Amis AA, Olearnik H, Parker BC, Scott JEet al., 2001, Periprosthetic bone mineral density changes with femoral components of differing design philosophy, INTERNATIONAL ORTHOPAEDICS, Vol: 25, Pages: 89-92, ISSN: 0341-2695

JOURNAL ARTICLE

Sanghera B, Naique S, Papaharilaou Y, Amis Aet al., 2001, Preliminary study of rapid prototype medical models, RAPID PROTOTYPING JOURNAL, Vol: 7, Pages: 275-284, ISSN: 1355-2546

JOURNAL ARTICLE

Sugita T, Amis AA, 2001, Anatomic and biomechanical study of the lateral collateral and popliteofibular ligaments, AMERICAN JOURNAL OF SPORTS MEDICINE, Vol: 29, Pages: 466-472, ISSN: 0363-5465

JOURNAL ARTICLE

Zavras TD, Race A, Bull AMJ, Amis AAet al., 2001, A comparative study of 'isometric' points for anterior cruciate ligament graft attachment, KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, Vol: 9, Pages: 28-33, ISSN: 0942-2056

JOURNAL ARTICLE

Sharifi F, Amis A, 2000, Bioresorbable poly-DL-lactide-co-glycolide/bioglass 45S5 biocomposite for tissue engineering

The preparation of a bioresorbable composite material with adequate mechanical and biocompatible properties for tissue engineering applications was investigated. The Bioglass® (BG) and poly-DL-lactide-co-glycolid (PDLLA-co-GA) were mixed in different volume fractions. The mechanical properties of the 22.9% Vf BG mixture were found to be within the cancellous bone properties. The preliminary in vitro cell seeding tests showed that the biocomposite substrates support the cells. SEM-EDAX studies of the surface indicated the presence the a HCA layer necessary for eliciting osteoblast activity.

CONFERENCE PAPER

Shih Y, Bull A, McGregor A, Humphries K, Amis Aet al., 2000, Dynamic ultrasound measurement of patellar lateral tracking, Ultrasound in Medicine and Biology, Vol: 26, ISSN: 0301-5629

This study used ultrasound scanning to investigate the patellar medial/lateral shift (patellar lateral tracking) in sitting flexion/extension and squatting. A femoral clamp was used to hold the ultrasound probe during testing. In sitting, the patella moved medially from 90° to 20° knee flexion, then turned laterally to terminal extension. Similar tracking pattern was observed for squatting. ANOVA revealed that the patellar lateral position was greatly affected by the movement pattern (p<0.0005), and was also influenced by the gender for maximum medial position (p<0.05). Height, patellar width and patellar length were found to have a moderate to good correlation to the patellar lateral tracking. Student t-test showed good inter- and intra-rater test-retest relationship (p<0.05) for patellar tracking measurement. This is the first dynamic patellar tracking evaluation in vivo using a non-invasive method. Further research is necessary for the accuracy and validity of this method, and for evaluation of patellofemoral patients.

JOURNAL ARTICLE

Wingfield C, Amis AA, Stead AC, Law HTet al., 2000, Cranial cruciate stability in the rottweiler and racing greyhound: an in vitro study, Journal of Small Animal Practice, Vol: 41, Pages: 193-197, ISSN: 0022-4510

JOURNAL ARTICLE

Wingfield C, Amis AA, Stead AC, Law HTet al., 2000, Comparison of the biomechanical properties of rottweiler and racing greyhound cranial cruciate ligaments, Journal of Small Animal Practice, Vol: 41, Pages: 303-307, ISSN: 0022-4510

JOURNAL ARTICLE

Amis AA, Kempson SA, 1999, Failure mechanisms of polyester fiber anterior cruciate ligament implants: A human retrieval and laboratory study, Journal of Biomedical Materials Research, Vol: 48, Pages: 534-539, ISSN: 0021-9304

It has been hypothesized that ACL implant failure is often caused by bone impingement in knee extension following malplacement of the tibial tunnel. This study examined polyethylene terephtalate fiber ACL implants retrieved from a clinical study, and, to confirm the hypothesis, also set up a laboratory study intended to duplicate the failure mechanism. SEM and TEM examination of 25 ruptured implants gave details of fiber failure morphology, with shearing into longitudinal fibrils, followed by rupture, when the fibrils burst apart. Cadaver joints were run in a knee simulator, with deliberately impinging ACL implants. SEM examination of implants abraded in the knee in vitro showed identical fiber damage patterns, thus confirming the impingement hypothesis.

JOURNAL ARTICLE

Amis AA, 1999, Anatomy and biomechanics of the posterior cruciate ligament, Sports Medicine and Arthroscopy Review, Vol: 7, Pages: 225-234, ISSN: 1062-8592

JOURNAL ARTICLE

Amis AA, 1999, The kinematics of knee stability, Journal of Bone and Joint Surgery-British Volume, Vol: 4, Pages: 96-104, ISSN: 0301-620X

JOURNAL ARTICLE

Amis AA, 1999, Patello-femoral joint replacement, Current Orthopaedics, Vol: 13, Pages: 64-70, ISSN: 0268-0890

JOURNAL ARTICLE

Amis AA, Kempson SA, 1999, Failure mechanisms of polyester fiber anterior cruciate ligament implants: A human retrieval and laboratory study, Journal of Biomedical Materials Research, Vol: 48, Pages: 534-539, ISSN: 0021-9304

JOURNAL ARTICLE

Amis AA, Kempson SA, 1999, Bone adaptation to a polyester fiber anterior cruciate ligament replacement, Journal of Long-Term Effects of Medical Implants, Vol: 9, Pages: 153-168, ISSN: 1050-6934

JOURNAL ARTICLE

Bull AMJ, Andersen HN, Basso O, Targett J, Amis AAet al., 1999, Incidence and mechanism of the pivot shift - An in vitro study, Clinical Orthopaedics and Related Research, Vol: 363, Pages: 219-231, ISSN: 0009-921X

JOURNAL ARTICLE

Giurea M, Zorilla P, Amis AA, Aichroth Pet al., 1999, Comparative pull-out and cyclic-loading strength tests of anchorage of hamstring tendon grafts in anterior cruciate ligament reconstruction, American Journal of Sports Medicine, Vol: 27, Pages: 621-625, ISSN: 0363-5465

JOURNAL ARTICLE

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: id=00000148&limit=30&person=true&page=10&respub-action=search.html