The present invention for the first time discloses a novel small molecular weight enamel matrix polypeptide which is at least 80%, such as 90% identical to the amino acid sequence as shown in SEQ ID NO: 1 (MPLPPHPGHP GYINFSYEVL TPLKWYQNMI RHPYTSYGYE PMGGWLHHQI IPWSQQTPQ SHA) (TRAP63), a homologue, analogue, or a pharmaceutically acceptable salt thereof. The present invention further discloses a pharmaceutical composition consisting of an enamel matrix polypeptide which is at least 80%, such as 90% identical to the amino acid sequence as shown in SEQ ID NO: 1, a homologue, analogue, or a pharmaceutically acceptable salt thereof, and a suitable pharmaceutical carrier, which further can consist of one or more enamel matrix polypeptides selected from the group of enamel matrix polypeptides which correspond to: a. SEQ ID NO: 2, b. SEQ ID NO: 3 and c. SEQ ID NO: 4.
