The group of bioceramics includes hydroxyapatites, which, due to their specific properties, are widely used in biotechnology. These compounds exist in skeletons of human and animal bodies. A range of advantages of implants, which contain, among other things, hydroxyapatites, results also from the level of their porosity. Recent trends that focus on the improvement in poor strength properties of HA coatings include the introduction of solid solution of in (Khalil, 2007, “Consolidation and Mechanical Properties of Nanostructured Hydroxyapatite Bioceramics by High Frequency Induction Heat Sintering,” Mater. Sci. Eng., 456, pp. 368–372; Chevalier, 2004, “Critical Effect of Cubic Phase on Aging in Yttria-Stabilized Zirconia Ceramics for Hip Replacement Prothesis,” Biomaterials, 25, pp. 5539–5545; Inuzuka, 2004, “Hydroxyapatite-Deped Zirconia for Preparation of Biomedical Composites Ceramics,” Solid State Ionics, 172, pp. 509–513; Sung, Y. M., and Kim, D. H., 2003, “Crystallization Characteristics of Yttria-Stabilized Zirconia/Hydroxyapatite Composite Nanopowder,” J. Cryst. Growth, 254, pp. 411–417; Marciniak, J., 2002, Biomateriały, Wydawnictwo Politechniki Śląskiej, Gliwice, Poland; Park J., and Bronzino J. D., 2000, Biomaterials, CRC, Boca Raton, FL; Yoshida, 2006, “Fabrication of Structure-Controlled Hydroxyapatite/Zirconia Composite,” J. Eur. Ceram. Soc., 26, pp. 515–518). It seems essential to determine the resulting structural and strength properties in the aspect of further application of composites based on hydroxyapatite with the addition of the zirconia phase. The investigations involved ceramic composites based on HA with different amounts of the phase modified with yttrium dioxide.