Failure of Hertwig's epithelial sheath diaphragm to investigate the proper horizontal level leads to:
TAURODONTISM

Also called Bull-like teeth.
Originally described by Sir Arthur Keith in 1913 to describe a condition in which the body of the tooth is enlarged at the expense of roots.
Caused by the failure of Hertwig’s epithelial sheath diaphragm to investigate the proper horizontal level.
Taurodontism.
Dentin dysplasia.
Pulp polyp.
Amelogenesis imperfecta.