The phrase "slab fractures" refers to a type of bone fracture where a flat, thin piece of the bone breaks. It is similar to a slab of stone breaking into smaller pieces. Full definition
According to the U.K. DentalVets group, «The teeth damaged have all had the same buccal slab fractures of the upper carnassials (see image). (healthypets.mercola.com)
They acquire multiple slab fractures in their eagerness to break the bone down as quickly as possible. (healthypets.mercola.com)
As one study notes, «Unfortunately, earthquake experience has proved that this form of construction is vulnerable to failure in which the thin concrete slab fractures around the supporting columns and drops downward, leading potentially to a complete progressive collapse of a building as one floor cascades down onto the floors below.» (treehugger.com)