Auxetic Expansion of the Tunica Albuginea for Penile Length and Girth Restoration Without a Graft: A Translational Study

Miranda, Alexandre Franco

doi:10.1016/j.esxm.2021.100456

Cited by 8 publications

(5 citation statements)

References 23 publications

(28 reference statements)

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“…The results of this study demonstrated auxetic incisions expanded the fabric cylinder in both penile length and circumference, while the mesh incisions only expanded in length or circumference. The resulting final volume obtained using the auxetic technique was 2.9-fold greater than that of the mesh technique ( 41 ). Illustrated images from their series are provided in Figure 5 .…”

Section: Resultsmentioning

confidence: 96%

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A contemporary systematic review of penile lengthening procedures with penile prosthesis

Roadman,

Feng,

Salkowski

et al. 2024

Transl Androl Urol

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Background Penile prosthetic devices are the standard treatment for erectile dysfunction (ED) after failure of maximum medical therapy and conservative options. Several penile lengthening procedures (PLPs) can be performed concurrently with penile prosthesis (PP) insertion in patients with severe ED, penile shortening, and/or Peyronie’s disease to help combat negative emotional and psychological concerns from penile length loss with penile prosthetic device placement. Methods An extensive, systematic literature review of the various pre-, intra-, and post-operative techniques that can be applied to preserve, restore or enhance penile length at the time of penile prosthetic implantation. Results Numerous pre-operative and post-operative inflation protocols exists with vacuum erection devices and penile traction therapy. Intraoperative surgical techniques include cavernosal sparing and channeling without dilatation, subcoronal incision with circumferential penile degloving and grafting, the sliding technique, the modified sliding technique, the multiple-slit technique, the tunical expansion procedure (TEP), modified TEP, and the auxetic expansion procedure. These approaches can be meaningful to restore and/or preserve length for patients undergoing PP insertion. Conclusions PLPs can be performed by surgeons who have extensive penile reconstruction experience and have been trained to do these procedures, as there is significant risk to the patient and limitations to what can be expected. Each patient must be counseled in detail about the risks and benefits of these procedures and have their expectations managed as the average postoperative penile length recovery is around 3 cm and can range from 0–4.0 cm. Future research is needed to identify the appropriate candidate for each approach, and how much length gain the patient can expect.

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Section: Resultsmentioning

confidence: 96%

“… From ref. ( 41 ). An illustrated version of auxetic technique: (A) circumferential auxetic incisions simultaneously enhance length and girth.…”

Section: Resultsmentioning

confidence: 99%

A contemporary systematic review of penile lengthening procedures with penile prosthesis

Roadman,

Feng,

Salkowski

et al. 2024

Transl Androl Urol

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“…Rotating Triangle (RT) structures have been widely studied in the literature, where the lattice angle was varied from 0°to 135°for investigating their possible applications in various domains [42,[94][95][96][97][98]. Some key application areas were biomedical sector, aerospace, textile, sensors, and actuators.…”

Section: Rotating Trianglementioning

confidence: 99%

Expansion potential of auxetic prosthetic skin grafts: a review

et al. 2023

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The expansion of conventional prosthetic skin grafts has been quantified to be very low and insufficient for treating large and severe burn injuries with small amounts of available donor skin. Auxetic metamaterials and structures are the new class of materials which shows expansion in both directions while stretching in one direction (i.e., negative Poisson’s effect). This property of auxetic materials offers unprecedented potential for expansions in prosthetic skin grafts, which is crucial for covering large burn injury sites. This review article focuses on summarizing the up-to-date literature on design and analysis of auxetic skin grafts, and their expansion potential. This knowledge is anticipated to advance burn mitigation research and allow for development of prosthetic skin grafts for severe burn skin replacements.

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“…Current skin grafting trends focus on improving the availability, effectiveness, expansions, and safety of the procedure [23]. Auxetic patterns were recently used in skin grafting to increase the expansion ratio and recover large burn areas effectively [34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Auxetic incisions with alternating slit shapes: a promising technique for enhancing synthetic skin grafts expansion

Gupta

Chanda

2023

Mater. Res. Express

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Split thickness skin grafts are widely used in treating burn injuries. To date, with limited availability of donor skin and minimal expansions offered by conventional skin grafting, it is challenging to cover large and severe burns. In this study, novel synthetic skin grafts with alternating slit (AS) shaped cut patterns were developed and tested to evaluate the expansion potentials offered by auxetic or negative Poisson’s ratio structures in skin grafting. A range of auxetic incision patterns were designed with varying unit cell dimensions, and these were projected onto skin using 3D printing. The mechanical properties and digital image correlation of the created synthetic skin grafts were used to determine stress, effective Poisson's ratio, meshing ratio (MR), and generated strains for strain loadings of up to 150%. The AS graft simulant with equal slit lengths and low slit spacings exhibited the maximum negative Poisson’s effect, expansion, and MR. Expansions were inversely related with the spacing between slits. The lowest value for the MR and highest stress was observed with high spacing, high horizontal slit length, and low vertical slit length. The expansions were highly sensitive to the applied strain, with low strains exhibiting high auxeticity. Such an extensive experimental investigation of the expansion potentials and stress estimations of skin grafts with varying AS dimensional parameters have not been conducted previously. The findings would be crucial for advancing research on mitigation of large burn injuries using high expansion skin grafts.

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Auxetic Expansion of the Tunica Albuginea for Penile Length and Girth Restoration Without a Graft: A Translational Study

Cited by 8 publications

References 23 publications

A contemporary systematic review of penile lengthening procedures with penile prosthesis

A contemporary systematic review of penile lengthening procedures with penile prosthesis

Expansion potential of auxetic prosthetic skin grafts: a review

Auxetic incisions with alternating slit shapes: a promising technique for enhancing synthetic skin grafts expansion

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