Simon J H, Kelly W H, Gordon D G, Ericksen G W
J Am Dent Assoc. 1978 Jul;97(1):17-23. doi: 10.14219/jada.archive.1978.0454.
Extrusion in a vertical direction was used in efforts to retain 14 teeth that had subcrestal fractures, perforations, or caries below the gingival tissue. Indications for the procedure, techniques, and complications are discussed.