thumb<unk> s (also denticles or endoliths) are nodular, calcified masses appearing in either or both the coronal and root portion of the<unk>  organ in teeth.<unk> s are not painful unless they impinge on nerves. They are classified: :A) On the basis of structure ::1) True<unk> s: formed of dentin by odontoblasts ::2) False<unk> s: formed by mineralization of degenerating<unk>  cells, often in a concentric pattern :B) On the basis of location ::1) Free: entirely surrounded by<unk>  tissue ::2) Adherent: partly fused with dentin ::3) Embedded: entirely surrounded by dentin
Pulp stone
Goa stone
Reading stone
Phlebolith
Gallstone
Sialolithiasis
Rhinolith
Dilaceration