A non-union which does go on to heal is called a delayed union.

Delayed Union: Poor blood supply or infection.

The Picacho Pass skirmish delayed Union forces for weeks after they retreated north.

Derangement of the expression of BMPs and other skeletally active cytokines may be important in understanding the failure of healing in delayed unions.

It has also been proven safe and effective in treatment of delayed union in long bone fractures and patients at a risk of non-union following spinal fusion surgeries.

Implantation of BMP-2 in a collagen sponge induces new bone formation and can be used for the treatment of bony defects, delayed union, and non-union.

RODIA methodology allows to perform a quantitative evaluation of the medical images (e.g. X-ray, ultrasonography), enhancing bone fracture detection, fracture healing monitoring and early detection of nonunion or delayed union and other issues.

Cape Well-met was discovered and named by the Swedish Antarctic Expedition, 1901-04, and commemorates the long delayed union at this point of a relief party under Dr. J. Gunnar Andersson and the winter party under Dr. Otto Nordenskjold after twenty months of enforced separation.