Embodiments of the invention relate to thermally-stable polycrystalline diamond (“PCD”) elements, polycrystalline diamond compacts (“PDCs”), and methods of fabricating such PCD elements and PDCs. In an embodiment, a method of fabricating a thermally-stable PCD element includes providing an at least partially leached PCD body including a plurality of interstitial regions, and infiltrating at least a portion of the interstitial regions of the at least partially leached PCD body with at least a portion of an infiltrant material. The infiltrant material may include at least one member chosen from the group of glass, silicone, and a ceramic having a negative coefficient of thermal expansion.