This retrospective study evaluates the results obtained over 10 cases of mandibular defects treated by means of Vertical Distraction Osteogenesis (VDO) towards implants prosthetic rehabilitation. Selecting criteria for the mandibular defect were: teeth defects with a minimum of three elements, a basal bone with a minimum height of 8.0mm and depth of 5.0mm. All cases were treated using the “Verona Device”. Device positioning was performed on the vestibular side of the mandible preserving the lingual periosteum and obtaining an ideal distraction vector toward implant insertion. Distraction protocol included: a latency period of 5 days, 0.5 to 1.0 mm of distraction rate and a stabilization period of 3 months. Surgical removal of the device was always combined with dental-implant insertions. After 3 months of osteointegration, second stage implant surgery and vestibuloplasty, by means of free palatal gengiva graft, were performed. All distraction procedures were successful allowing inserting a total of 45 oral implants. During implants insertion, histological evaluation was performed by means of a cylindrical-biopsy. Histology confirmed bony formation with the typical features of the distracted bone and with degree of density adequate for implants insertion with good primary stability. At the time of second stage implant surgery, implant osteointegration was confirmed for all implants accept one (implant survival rate 3 months after insertion: 97%). The mean follow-up of implant osteointegration ranged from 8 to 42 months (average: 28.5 months). The masticatory load ranged from to 1 to 34 months, reporting an implant success rate of 100%. X-ray investigations after 12 and 24 months of implant loading revealed minimum resorption of the bone surrounding the implants. At the same, time clinical evaluation of perimplant soft tissue was negative. Thanks to the ideal positioning of the fixtures at the time of their insertion, functional and aesthetic prosthetic rehabilitation was achieved in all cases.
A retrospective study of 45 oral implants inserted in mandibular bone defects rehabilitated by meand of vertical distraction osteogenesis
ALBANESE, Massimo;BERTOSSI, Dario;D'AGOSTINO, Antonio;FIOR, Andrea;NOCINI, Pier Francesco
2004-01-01
Abstract
This retrospective study evaluates the results obtained over 10 cases of mandibular defects treated by means of Vertical Distraction Osteogenesis (VDO) towards implants prosthetic rehabilitation. Selecting criteria for the mandibular defect were: teeth defects with a minimum of three elements, a basal bone with a minimum height of 8.0mm and depth of 5.0mm. All cases were treated using the “Verona Device”. Device positioning was performed on the vestibular side of the mandible preserving the lingual periosteum and obtaining an ideal distraction vector toward implant insertion. Distraction protocol included: a latency period of 5 days, 0.5 to 1.0 mm of distraction rate and a stabilization period of 3 months. Surgical removal of the device was always combined with dental-implant insertions. After 3 months of osteointegration, second stage implant surgery and vestibuloplasty, by means of free palatal gengiva graft, were performed. All distraction procedures were successful allowing inserting a total of 45 oral implants. During implants insertion, histological evaluation was performed by means of a cylindrical-biopsy. Histology confirmed bony formation with the typical features of the distracted bone and with degree of density adequate for implants insertion with good primary stability. At the time of second stage implant surgery, implant osteointegration was confirmed for all implants accept one (implant survival rate 3 months after insertion: 97%). The mean follow-up of implant osteointegration ranged from 8 to 42 months (average: 28.5 months). The masticatory load ranged from to 1 to 34 months, reporting an implant success rate of 100%. X-ray investigations after 12 and 24 months of implant loading revealed minimum resorption of the bone surrounding the implants. At the same, time clinical evaluation of perimplant soft tissue was negative. Thanks to the ideal positioning of the fixtures at the time of their insertion, functional and aesthetic prosthetic rehabilitation was achieved in all cases.
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