former is heavy weight while the latter is medium weight and possesses larger pore sizes. The 2D PPNT is a non-woven PP material that is available in three different weights and thicknesses (Fig.4.10). These meshes are congured in a variety of shapes and sizes as shown.

probably the oldest at sheet of heavy weight polypropylene in existence, having been brought to market in the early 1960s (Fig.4.13). It is still in use today and like many of these prostheses, a lightweight and more macroporous version has been developed, the Bard Soft Mesh (Fig.4.14). Biomesh P1 (Fig.4.15) is the standard weight material compared to the Premium (Fig.4.16). It is available for extraperito­neal placement in various shapes and sizes for laparoscopic inguinal and ventral hernia repairs. Bulev B and Bulev UL are somewhat similar to the Basic and Basic Evolution meshes discussed above (Figs.4.17 and 4.18). The weights of the Bulev

DynaMesh comes in two weights; Dynamesh PP—Standard (Fig.4.19, right) is twice the weight of the Dynamesh PP—Light (Fig.4.19, left) product. Easy Prothes is available as a heavy weight material (90g/m2), two medium products (70g/m2 and 60g/m2), and a lightweight version (40g/m2). Figures4.20 and 4.21 compare the medium and lightweight versions. The Hermesh 3–8 have a huge variety of sizes and graduated weights from heaviest (3) to lightest (8) and sizes (Fig.4.22).

Optilene products are all lightweight materials that vary from the heaviest by that

name (60gm/m

Elastic version has unequal pore sizes (3.6×2.8mm) to allow for multidirectional elasticity (Figs.4.23, 4.24, and 4.25). Parietene Flat Sheet and Parietene Lightweight products are monolament at sheet products (Fig.4.26). Premilene is the heaviest

inguinal and extraperitoneal ventral hernia repair (Fig. 4.16). Prolene is also a heavier weight mesh material and it is one of the older products available (Fig.4.28). Prolene Soft Mesh is the lighter weight version that has larger pores than the original mesh and blue lines through the product (Fig.4.29). Prolite was one of the earliest meshes that were initially introduced as a lighter weight material (Fig.4.30). Today, it is considered a mid-weight mesh. Prolite Ultra possesses even less weight of mesh than Prolite (Fig.4.31).