Effect of intracanal dressings on repair and apical bridging of teeth with incomplete root formation.
Periapical repair and apical bridging were studied in dog's teeth with incomplete root formation and induced chronic periapical lesions treated with different dressings. A total of 75 root canals from the upper and lower premolars of 4 dogs approximately 6 months of age were chemo-mechanically prepared and filled with the following dressings: antibacterial dressing consisting of a calcium hydroxide+camphorated p-monochlorophenol paste applied for 7 days and followed by monthly renewed calcium hydroxide paste as temporary dressing at 30, 60 and 90 days (Group A); antibacterial dressing consisting of camphorated p-monochlorophenol alone for 7 days, followed by temporary dressing with calcium hydroxide paste renewed at 30, 60 and 90 days (Group B). A control group (Group C) received no dressings. Ninety days after the last calcium hydroxide paste (Groups A, B) and after the last irrigation/aspiration (Group C), the animals were killed, the maxillae and mandibles were removed, and the material submitted to routine histological processing and examination. Both root canal dressings, were of fundamental importance for apical repair and bridging. The apical bridging was predominantly complete in Group A, incomplete in Group B, and absent in Group C. The calcium hydroxide+camphorated p-monochlorophenol combination gave better results than camphorated p-monochlorophenol alone.
Leonardo
M R
MR
Department of Endodontics, Araraquara Dental School, UNESP, Brazil.
Bezerra da Silva
L A
LA
Utrilla
L S
LS
Leonardo
R de T
Rde T
Consolaro
A
A
D000818:Animals; D000890:Anti-Infective Agents / Q000627:therapeutic use*; D002126:Calcium Hydroxide / Q000627:therapeutic use; D002164:Camphor / Q000627:therapeutic use; D002733:Chlorophenols / Q000627:therapeutic use; D004285:Dogs; D004338:Drug Combinations; D010485:Periapical Periodontitis / Q000188:drug therapy*; D012388:Root Canal Irrigants / Q000627:therapeutic use*; D012389:Root Canal Obturation; D014092:Tooth Root / Q000254:growth & development / Q000473:pathology*
D000890:Anti-Infective Agents; D002733:Chlorophenols; D004338:Drug Combinations; D012388:Root Canal Irrigants; D002164:Camphor; C029804:camphorated parachlorophenol; D002126:Calcium Hydroxide