Sharma, G;    Kneafsey, L;    Ashley, P;    Noar, J;      (2015)    Failure of eruption of permanent molars: a diagnostic dilemma.                   International Journal of Paediatric Dentistry , 26  (2)   pp. 91-99.    10.1111/ipd.12163 <https://doi.org/10.1111/ipd.12163>.       Green open access