Purpose: to determine whether new bone will form coronal to retained endodontically treated roots
N= 2 Macaca Speciosa monkeys
•Conventional RCT was done for central incisor, lateral incisor, second premolar & first molar.
•Contralateral teeth were extracted to serve as a control group.
•The crown has been removed to the level of the alveolar bone, then the roots amputated 2-3 mm below the crest of the alveolar bone, and sharp edges Rounded
•Approximation of the labial flaps to the lingual tissue, suturing with no. 3-0 silk sutures.
•Clinical & radiographic examination were conducted at 6, 12 & 20 weeks intervals.
•Procion Dye was administered to label newly bone formed a week before they were killed.
Most highlighted Results:
– normal and uncomplicated healing of the soft tissue with normal attached, unattached alveolar muccosa & and adequate vestibule
– The extreme distobuccal aspect of the posterior segment was the only site of inflammation after 5 months in both monkeys.
– The normal resorpative process continued & at 5 months it had slowed to an indiscernible amount
– Bone formation was apparent in 1 / 4 anteriors & 4 / 8 posterior retained root tips