title: Effect of immediate calcium hydroxide treatment and permanent root-filling on periodontal healing in contaminated replanted teeth.
abstract: The effect of immediate permanent root-filling and immediate intracanal calcium hydroxide treatment on experimentally contaminated and necrotized periodontal membranes (PDM) in avulsed and subsequently replanted monkey teeth was studied. Almost the entire root surface in the non-endodontically treated control teeth were covered with inflammatory resorption. A significant shift towards ankylosis not associated with root resorption (greater than 80% of the total root surface area) was noted following calcium hydroxide treatment. About two thirds of the root surfaces from the teeth with permanent root fillings showed surface resorptions or ankylosis preceded by root resorption. The root surface area which would have been covered by inflammatory resorption, unless endodontic treatment had been implemented, were instead predominantly covered by either surface resorption (permanent root filling) or ankylosis (calcium hydroxide treatment). Ankylosis compared with surface resorption may in the long term lead to progressive loss of root substance due to replacement resorption. It was concluded that calcium hydroxide may be an excellent initial intracanal treatment in teeth with healthy PDM, but care should be taken not to risk unnecessary development of ankylosis by prolonged treatment of teeth with compromised PDM.
authors.affiliation: Department of Histology and Neurobiology, School of Dentistry, Karolinska Institutet, Stockholm, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Lengheden
authors.forename: L
authors.initials: L
authors.lastname: Blomlöf
authors.forename: S
authors.initials: S
authors.lastname: Lindskog
mesh_terms: D000539:Alveolar Process / Q000473:pathology; D000818:Animals; D000844:Ankylosis / Q000473:pathology; D002126:Calcium Hydroxide / Q000494:pharmacology*; D003238:Connective Tissue / Q000473:pathology; D003739:Dental Cementum / Q000473:pathology; D003804:Dentin / Q000473:pathology; D007180:Incisor; D008252:Macaca fascicularis; D009336:Necrosis; D010513:Periodontal Ligament / Q000473:pathology; D010519:Periodontium / Q000473:pathology / Q000503:physiopathology*; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials / Q000494:pharmacology*; D012390:Root Canal Therapy; D012391:Root Resorption / Q000473:pathology; D014076:Tooth Diseases / Q000473:pathology; D014090:Tooth Replantation; D014945:Wound Healing
chemical_list: D012387:Root Canal Filling Materials; D002126:Calcium Hydroxide