Production of thin Shell Clavicle Implants through Single Point Incremental Forming

Vanhove, Hans; Carette, Yannick; Vancleef, Sanne; Duflou, Joost R.

doi:10.1016/j.proeng.2017.04.058

Cited by 43 publications

(21 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the use of patient-specific implants to reduce hardware irritation could be the solution to avoid this complication. 32 Our study has some limitations that need to be addressed. We chose to focus on the surface morphology because this will determine the fit of a plate and did not provide any information about the intramedullary canal or the cortical thickness.…”

Section: Discussionmentioning

confidence: 94%

Why off-the-shelf clavicle plates rarely fit: anatomic analysis of the clavicle through statistical shape modeling

Vancleef

Herteleer

Carette

et al. 2019

Journal of Shoulder and Elbow Surgery

Self Cite

View full text Add to dashboard Cite

Background The clavicle presents a large variability in its characterizing sigmoid shape. Prominent and nonproperly fitting fixation plates (FP) cause soft tissue irritation and lead to hardware removal. It is therefore key in FP design to account for shape variations. Statistical shape models (SSMs) have been built to analyze a cluster of complex shapes. The goal of this study was to describe the anatomical variation of the clavicle using SSMs. Methods Two different SSMs of the clavicle were created and their modes of variation were described. One model contained 120 left male and female clavicles. The other model consisted of 76 left and corresponding right clavicles, 41 originating from men and 35 from women. Results The model of 120 left clavicles showed that 10 modes of variation are necessary to explain 95% of the variation. The most important modes of variation are the clavicle length, inferior-superior bow, and medial and lateral curvature. Statistically significant differences between male and female clavicles were seen in length, sigmoid shape, and medial curvature. Comparison in men between left and right revealed significant differences in length and medial curvature. For women, a statistically significant difference between left and right was only seen in the length. Conclusion Although the operative treatment of displaced midshaft clavicular fractures has clear benefits, the variable anatomy of the clavicle often makes it challenging for the surgeon to make the plate fit adequately. Based on the identified variability in the clavicle's anatomy, it seems unlikely that a clavicle plating system can fit the entire population.

show abstract

Section: Discussionmentioning

confidence: 94%

Why off-the-shelf clavicle plates rarely fit: anatomic analysis of the clavicle through statistical shape modeling

Vancleef

Herteleer

Carette

et al. 2019

Journal of Shoulder and Elbow Surgery

Self Cite

View full text Add to dashboard Cite

show abstract

“…SPIF enables the production of small batches, development of prototypes, and the economically competitive production of customized elements such as biomedical implants [7]. The literature has addressed the general biomedical applications of SPIF [8,9] and also a number of specific applications such as maxillofacial implants [10], clavicle implants [11], denture plates [12], and ankle supports [13]. It is precisely in this field that titanium alloys are of special interest due to their biocompatible characteristics.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Formability and Dimensional Accuracy Improvement of Ti6Al4V in Warm SPIF Processes

Naranjo

Miguel

Martínez

et al. 2019

Metals

View full text Add to dashboard Cite

Single Point Incremental Forming (SPIF) has great potential as it can be easily implemented and the forming process does not require the use of dies. However, its application to high performance alloys such as Ti6Al4V has not been resolved due to its characteristic low formability. In the literature, studies on the warm SPIF process applied to this alloy report improved formability. However, in some of these studies the procedures used are complex and in others the surface finishes obtained are unsatisfactory. The present study proposes a methodology consisting of a simple heating device which permits working at moderate temperatures and quantifies the benefit of the temperature on the alloy formability, the forces acting during the process, and finally the dimensional precision of the parts produced. Working temperatures in the range of 300–400 °C significantly reduce forces, increase formability of the alloy, and substantially reduce springback. However, the springback values suggest the need for dimensional compensation at the design stage of products.

show abstract

“…Several research groups have recognized the potential of SPIF for skull implant manufacturing with a variety of materials being tested (Gottmann 2012, Bagudanch et al 2015. Vanhove et al (2017) recently broadened the spectrum of medical applications with a demonstration of the effectiveness of SPIF to manufacture titanium clavicular implants. The thin shell alternative to conventional reconstruction offers a geometrically superior fit, better bone alignment and can eliminate the need for reoperation for implant removal.…”

Section: Biomedical Applicationsmentioning

confidence: 99%

Single point incremental forming: state-of-the-art and prospects

et al. 2017

Self Cite

View full text Add to dashboard Cite

Incremental sheet metal forming in general and Single Point Incremental Forming (SPIF) specifically have gone through a period of intensive development with growing attention from research institutes worldwide. The result of these efforts is significant progress in the understanding of the underlying forming mechanisms and opportunities as well as limitations associated with this category of flexible forming processes. Furthermore, creative process design efforts have enhanced the process capabilities and process planning methods. Also, simulation capabilities have evolved substantially. This review paper aims to provide an overview of the body of knowledge with respect to Single Point Incremental Forming. Without claiming to be exhaustive, each section aims for an up-to-date state-of-the-art review with corresponding conclusions on scientific progress and outlook on expected further developments.

show abstract

Production of thin Shell Clavicle Implants through Single Point Incremental Forming

Cited by 43 publications

References 7 publications

Why off-the-shelf clavicle plates rarely fit: anatomic analysis of the clavicle through statistical shape modeling

Why off-the-shelf clavicle plates rarely fit: anatomic analysis of the clavicle through statistical shape modeling

Evaluation of the Formability and Dimensional Accuracy Improvement of Ti6Al4V in Warm SPIF Processes

Single point incremental forming: state-of-the-art and prospects

Contact Info

Product

Resources

About