Effect of wire and arc additive manufacturing (WAAM) process parameters on bead geometry and microstructure

M Dinovitzer, X Chen, J Laliberte, X Huang, H Frei - Additive Manufacturing, 2019 - Elsevier
This paper discusses the effects of process parameters in TIG based WAAM for specimens
created using Hastelloy X alloy (Haynes International) welding wire and 304 stainless-steel …

The effect of nucleotomy on lumbar spine mechanics in compression and shear loading

H Frei, TR Oxland, GC Rathonyi, LP Nolte - Spine, 2001 - journals.lww.com
Study Design. An in vitro biomechanical investigation on human cadaveric specimens was
conducted before and after nucleotomy. Endplate and vertebral body deformation patterns …

Mechanoregulation modelling of stretching versus bending dominated periodic cellular solids

A Parisien, MSA ElSayed, H Frei - Materials Today Communications, 2022 - Elsevier
With additive manufacturing advancements, the possibility of creating lattice-based 3D-printed
implants can enhance the osseointegration of orthopedic devices. To this date, there is no …

The acetabular labrum: a review of its function

S Bsat, H Frei, PE Beaulé - The bone & joint journal, 2016 - boneandjoint.org.uk
The acetabular labrum is a soft-tissue structure which lines the acetabular rim of the hip joint.
Its role in hip joint biomechanics and joint health has been of particular interest over the …

A biomechanical study comparing cortical onlay allograft struts and plates in the treatment of periprosthetic femoral fractures

D Wilson, H Frei, BA Masri, TR Oxland, CP Duncan - Clinical Biomechanics, 2005 - Elsevier
Background: Periprosthetic femoral fractures with well-fixed femoral components can be
difficult to manage and internal fixation is usually necessary. This study was designed to …

Concept based query expansion

Y Qiu, HP Frei - Proceedings of the 16th annual international ACM …, 1993 - dl.acm.org
Query expansion methods have been studied for a long time - with debatable success in
many instances. In this paper we present a probabilistic query expansion model based on a …

Subsidence of spinal fusion cages: a systematic review

…, EK Wai, MSA ElSayed, H Frei - International Journal of …, 2022 - ijssurgery.com
Background Although many research studies investigating subsidence of intervertebral fusion
cages have been published, to our knowledge, no study has comprehensively compared …

Surgical correction of cam deformity in association with femoroacetabular impingement and its impact on the degenerative process within the hip joint

…, AD Speirs, H Anwander, G Melkus, K Rakhra, H Frei… - JBJS, 2017 - journals.lww.com
Background: Cam morphology in association with femoroacetabular impingement (FAI) is a
recognized cause of hip pain and cartilage damage and proposed as a leading cause of …

The differential in vitro and in vivo responses of bone marrow stromal cells on novel porous gelatin–alginate scaffolds

C Yang, H Frei, FM Rossi… - Journal of Tissue …, 2009 - Wiley Online Library
Tissue engineering and stem cell therapy hold great potential of being able to fully restore,
repair and replace damaged, diseased or lost tissues in the body. Biocompatible porous …

Thoracolumbar spine mechanics contrasted under compression and shear loading

H Frei, TR Oxland, LP Nolte - Journal of orthopaedic research, 2002 - Wiley Online Library
The mechanical properties of the human spine have been studied extensively in compression,
but there remains a lack of fundamental data in shear. The overall goal of this study was …