Imperial College London

ProfessorAndrewAmis

Faculty of EngineeringDepartment of Mechanical Engineering

Professor
 
 
 
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Contact

 

+44 (0)20 7594 7062a.amis

 
 
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Assistant

 

Ms Fabienne Laperche +44 (0)20 7594 7033

 
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Location

 

713City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

414 results found

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

Keen CE, Amis AA, 1999, Polyester fibre prosthetic anterior cruciate ligament implant rupture: necrosis of ingrown connective tissue, Histopathology, Vol: 35, Pages: 74-81, ISSN: 0309-0167

JOURNAL ARTICLE

Kerner J, Huiskes R, van Lenthe GH, Weinans H, van Rietbergen B, Engh CA, Amis AAet al., 1999, Correlation between pre-operative periprosthetic bone density and post-operative bone loss in THA can be explained by strain-adaptive remodelling, Journal of Biomechanics, Vol: 32, Pages: 695-703, ISSN: 0021-9290

JOURNAL ARTICLE

Amis AA, Jakob RP, 1998, Anterior cruciate ligament graft positioning, tensioning and twisting., Knee Surg Sports Traumatol Arthrosc, Vol: 6 Suppl 1, Pages: S2-12, ISSN: 0942-2056

This paper reports on a scientific workshop to study anterior cruciate ligament (ACL) reconstruction. The aim is to present recommendations for ACL reconstruction methods that will be of use for surgeons. A study of knee anatomy and graft placement concluded that the tibial attachment must be posterior enough to avoid graft impingement against the femur, and methods to attain this were presented. On the femur, poor graft placement leads to excessive changes of the graft attachment site separation distance as the knee flexes, and the worst case corresponds to the attachment being too far anterior. It was agreed that there were typical patterns of graft tension changes as the knee flexes, and that grafts should be tensioned close to full knee extension. A typical tensioning protocol would be 60 N tension applied at 10 degrees of flexion. It was recognised that graft remodelling caused uncontrollable tension changes post-operation. Graft twisting, to recreate the anatomical spiral of ACL fibres seen in the flexed knee, was also discussed.

JOURNAL ARTICLE

Amis AA, 1998, Biomechanics of the elbow, Joint replacement in the shoulder and elbow, Editors: Wallace, Publisher: Butterworth Heinemann, Pages: 103-125, ISBN: 9780750613675

BOOK CHAPTER

Amis AA, 1998, Biomechanics of the elbow, Surgery of the elbow - practical and scientific aspects, Editors: Stanley, Kay, Publisher: Arnold, Pages: 15-27, ISBN: 9780340598054

BOOK CHAPTER

Amis AA, Jakob RP, 1998, Anterior cruciate ligament graft positioning, tensioning and twisting, Knee Surgery, Sports Traumatology and Arthroscopy, Vol: 6, Pages: 2-12, ISSN: 0942-2056

JOURNAL ARTICLE

Beynnon BD, Amis AA, 1998, In vitro testing protocols for the cruciate ligaments and ligament reconstructions., Knee Surg Sports Traumatol Arthrosc, Vol: 6 Suppl 1, Pages: S70-S76, ISSN: 0942-2056

The techniques that have been used to characterize the biomechanical behavior of the knee, cruciate ligaments, and cruciate ligament replacements differ, making comparisons between studies difficult or, at times, impossible. Therefore, it is important to standardize the testing protocols and techniques that describe the biomechanical behavior of the knee and cruciate ligaments. This will allow investigators to express opinions with respect to the interpretation of data, rather than based on differences between testing techniques. Standardized techniques are proposed to locate the origins of the tibial and femoral coordinate systems, and thus, allow comparisons of knee kinematics (e.g., displacements and rotations) between investigations. Standard techniques that can be used to measure the load-displacement behavior of the knee are described, and important considerations that should be appreciated with respect to preparing and testing of the joint are summarized. It is important to evaluate the single cycle load-to-failure characteristics and the cyclic loading response of an anterior cruciate ligament graft, and techniques to evaluate cruciate ligament graft fixation are proposed. The strengths of different models to characterize the biomechanical behavior of the knee are reviewed.

JOURNAL ARTICLE

Beynnon BD, Amis AA, 1998, In vitro testing protocols for the cruciate ligaments and ligament reconstructions, Knee Surgery, Sports Traumatology and Arthroscopy, Vol: 6, Pages: 70-76, ISSN: 1433-7347

JOURNAL ARTICLE

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