( ( The materials ) ( ( used ( for ( ( the ( replacement ( hip joints ) ) ) ( ( were usually ) ( metals ( such ( as ( titanium ( with ( ( the ( hip socket ) ) ( usually ( lined ( with plastic ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS materials)) (VP (VBD used) (SBAR (IN for) (S (NP (DT the) (NN replacement) (NN hip) (NNS joints)) (VP (VBD were) (ADVP (RB usually)) (NP (NP (NNS metals)) (PP (JJ such) (IN as) (NP (NP (NN titanium)) (PP (IN with) (NP (NP (DT the) (NN hip) (NN socket)) (VP (ADVP (RB usually)) (VBN lined) (PP (IN with) (NP (NN plastic))))))))))))) (. .)))
The materials used for the replacement hip joints were usually metals such as titanium with the hip socket usually lined with plastic.
(ROOT (S (NP (NNP Metal)) (VP (VBZ is) (ADVP (RB regularly)) (VP (VBN used) (PP (IN in) (NP (JJ human) (NN hip) (CC and) (NN knee) (NNS implants))))) (. .)))