Periodontal tissue regeneration including cementogenesis adjacent to dentin-bonded retrograde composite fillings in humans.
The roots of two incisors were treated by apicoectomy and a retrograde dentin-bonded composite filling. Periapical healing was observed a few months later by radiography. Later, due to root fracture and marginal bone resorption, the apical parts were removed including adjacent periapical bone. A histological and scanning electron microscopic examination of the tissue showed reformation of periodontium adjacent to the composite, including reformation of a lamina dura, inserting Sharpey's fibers and cementum deposited in intimate contact with the composite. This finding is in agreement with previous observations of tissue surrounding retrograde dentin-bonded composite fillings placed in monkeys, indicating that tissue regeneration including cementogenesis may occur on composite material and consequently form a biological closure of the root canal.
Department of Oral Surgery and Oral Medicine, University Hospital (Rigshospitalet), Copenhagen.
J O
JO
Andreasen
E C
EC
Munksgaard
L
L
Fredebo
J
J
Rud
D000328:Adult; D025021:Cementogenesis; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D006801:Humans; D007180:Incisor; D008297:Male; D008855:Microscopy, Electron, Scanning; D010486:Periapical Tissue / Q000503:physiopathology*; D010513:Periodontal Ligament / Q000503:physiopathology*; D012184:Retrograde Obturation; D014092:Tooth Root / Q000254:growth & development*
D003188:Composite Resins; D017220:Dentin-Bonding Agents