( ( Guided ( bone ( and ( tissue regeneration ) ) ) ) . )
(ROOT (S (VP (VB Guided) (NP (NN bone) (CC and) (NN tissue) (NN regeneration))) (. .)))
Guided bone and tissue regeneration.
(ROOT (S (NP (NNS Bones)) (VP (VBP are) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NNS tissues))))) (. .)))