PTH and osteoarthritis: PTH prevents cartilage degeneration and/or the deterioration of subchondral bone (Sampson et al., 2011; Orth et al., 2013; Bellido et al., 2011; Yan et al., 2014; Chang et al., 2009; Lugo et al., 2012; Eswaramoorthy et al., 2012; Cui et al., 2020; Morita et al., 2018; Dai et al., 2016; Chen et al., 2018), induces cartilage regeneration or chondrocytes proliferation in osteoarthritis (Sampson et al., 2011; Petersson et al., 2006), and stimulates subchondral bone and articular cartilage repair of focal osteochondral defects (Orth et al., 2013).