Geometric analysis of the talus and development of a generic talar prosthetic

Trovato, Alexandra; El‐Rich, Marwan; Adeeb, Samer; Dhillon, Suki; Jomha, Nadr M.

doi:10.1016/j.fas.2016.12.002

Cited by 21 publications

(55 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the surgeon-altered shape, we found the following percentage of deviated points more than 1 mm: tibial-talar (2%), talar-navicular (13%), and talarcalcaneal (5%). For the case of Trovato et al (2017)'s talus, our findings revealed a comparatively lower percentage of deviated points when compared to the surgeon-altered shape; specifically, 2% in tibial-talar, 6.6% in talar-navicular, and 2.8% in calcanealtalar. Lastly, in the average female talus in the current study, we found 2% of deviated points in tibial-talar articular surface, and negligible percentages for the other two surfaces.…”

Section: Geometry Comparison With Other Studiesmentioning

confidence: 51%

“…FIGURE 6 | Comparison of the average male talus in the study (as reference), with average talus shapes from three sources: (1) Trovato et al (2017); (2) surgeon-altered; (3) the female talus in the current study.…”

Section: Discussionmentioning

confidence: 99%

“…male talus shape, surgeon-altered and Trovato et al (2017)'s talus showed a similar percentage at 8%, whereas the average female shape had the lowest percentage at 0.6% (Figure 6).…”

Section: Geometry Comparison With Other Studiesmentioning

confidence: 93%

See 2 more Smart Citations

Investigation of the Average Shape and Principal Variations of the Human Talus Bone Using Statistic Shape Model

Liu

Jomha

Adeeb

et al. 2020

Front. Bioeng. Biotechnol.

Self Cite

View full text Add to dashboard Cite

Due to the complexity of articular interconnections and tenuous blood supply to the talus, talus fractures are often associated with complications (e.g., avascular necrosis). Currently, surgically fusing the talus to adjacent bones is widely used as treatment to talus fractures, but this procedure can greatly reduce mobility in the ankle and hindfoot. Alternatively, customized talus implants have shown an overall satisfactory patient feedback but with the limitation of high expenses and time-consuming manufacturing process. In order to circumvent these disadvantages, universal talus implants have been proposed as a potential solution. In our study, we aimed to develop a methodology using Statistical Shape Model (SSM) to simulate the talus, and then evaluate the feasibility of the model to obtain the mean shape needed for universal implant design. In order to achieve this, we registered 98 tali (41 females and 57 males) and used the registered dataset to train our SSM. We used the mean shape derived from the SSM as the basis for our talus implant template, and compared our template with that of previous works. We found that our SSM mean shape talus implant was geometrically similar to implants from other works, which used a different method for the mean shape. This suggests the feasibility of SSM as a method of finding mean shape information for the development of universal implants. A second aim of our study was to investigate if one scalable talus implant can accommodate all patients. In our study, we focused on addressing this from a geometric perspective as there are multiple factors impacting this (e.g., articular surface contact characteristics, implant material properties). Our initial findings are that the first two principal components should be afforded consideration for the geometrical accuracy of talus implant design. Additional factors would need to be further evaluated for their role in informing universal talus implant design.

show abstract

Section: Geometry Comparison With Other Studiesmentioning

confidence: 51%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the Average Shape and Principal Variations of the Human Talus Bone Using Statistic Shape Model

Liu

Jomha

Adeeb

et al. 2020

Front. Bioeng. Biotechnol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…One possible solution to the issues associated with arthrodesis and arthroplasties is a talar body implant that replaces the avascular portion of the talus or the entire talus to maintain ankle joint motion and function. 8 At this time, there have been some reports of talar body replacements. These implants have been custom made from various materialsstainless steel, 9 alumina ceramic, [10][11][12] titanium alloy, 13 and cobalt-chrome.…”

Section: Introductionmentioning

confidence: 99%

“…Islam et al 15 proposed an implant in five sizes; however, that study had limitations including a small sample size (n = 27), lack of a diverse sample selection such that the female population was severely underrepresented, a randomly selected reference implant, and an incremental jump in size of volume (which will be more significant in the smaller sizes as volume is a cubic function). Trovato et al 8 improved upon this study by increasing the sample size (n = 91) with 45% of the subjects being female, selectively choosing the reference implant, and using incremental jump in the cube root of the volume between sizes. From this analysis, ten unisex implant sizes for the talus bone were created to maintain geometric compatibility of the ankle joint.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a generic talar prosthetic with a biological talus: A cadaver study

Trovato

Bornes

El‐Rich

et al. 2018

Journal of Orthopaedics

Self Cite

View full text Add to dashboard Cite

Treatment for talar avascular necrosis is challenging. This study evaluates the feasibility of a generic talar implant by cadaveric assessment. Ten cadaveric ankles were CT-scanned to determine talar implant size. The opposite ankles were CT-scanned with the biological talus and then with the implant. 3D ankle geometry was reconstructed and implant position was compared to the biological talus position. The averages among specimens' positive and negative average-deviations were 0.91 mm and 0.70 mm. Seventy percent of talar dome deviations between the biological talus and implant were within an acceptable range. This study yields promising results to support a generic talus bone prosthetic.

show abstract