dental composition, kit of parts and use of them. The present application relates to a dental composition comprising a) a compound (a) having the following characteristics: only one main chain unit (u) having 6 to 20 carbon atoms, at least 6 carbon atoms thereof forming aromatic or aliphatic cyclic moiety, the other carbon atoms being part of the pendant substituents of the cyclic moiety or part of the spacer moiety linking groups, with one or more carbon atoms being substituted by one oxygen atom, the moiety main chain moiety not comprising a bisphenol structure and halogen atoms, one or two unit (s) being connected to the main chain unit (s) via an ether bond, at least one unit (s) ) comprising a -ch2-ch2-ch2-ch2-o-ch2-ch2-ch (q) -og moiety or a -ch2-ch (og) -ch2-om moiety or a mixture of these two types of moieties within a unit (s), with gas comprising at least one p-portion and a urethane moiety, the urethane moiety acting as a connecting member to the unit (s) and comprising at least one group selected from acroyl, methacryl, aryl, mixtures and combinations thereof, q. comprising at least one group selected from hydrogen, methyl, feline, phenoxymethyl, mixtures and combinations thereof and provided that in the main chain unit (u) at least two substituents are attached, each having at least a group g, where, in the case where only one unit (s) is present, the group g which is not part of said unit (s) is located in the additional hanging substituent of unit (u), b) a filler (b ) and c) an initiator (c).composição dental, kit de peças e uso dos mesmos. o presente pedido refere-se a uma composição dental que compreende a) um composto (a) com as seguintes características: apenas uma unidade de cadeia principal (u) com 6 a 20 átomos de carbono, ao menos 6 átomos de carbono da mesma formando uma porção cíclica aromática ou alifática, os demais átomos de carbono fazendo parte dos substituintes pendentes da porção cíclica ou fazendo parte dos grupos de ligação às unid
