TY - RPRT TI - Ceramic prostheses used as a columella. AU - T Palva AU - L G Johnsson AU - A Kohonen PY - 1987 DO - 10.1111/j.1365-2273.1987.tb00160.x UR - https://pubmed.ncbi.nlm.nih.gov/3829435/ ID - 3829435 ER -