Ridge preservation comparing the clinical and histologic healing ofan intrasocket allograft vs. a facial overlay xenograft using a bioresorbable barrier membrane.

Ridge preservation;papilla preservation;allograft;xenograft

Evmenios Poulias

University:University of Louisville

Department:Oral Biology

关键词: Ridge preservation;    papilla preservation;    allograft;    xenograft;   

Others  :  https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=2145&context=etd

美国|英语

来源: The Universite of Louisville's Institutional Repository

【 摘 要 】

Aim. The efficacy of ridge preservation procedures using grafting materials and barrier membranes has been well established in the literature. However, the loss of horizontal width even with the utilization of intrasocket only guided bone regeneration procedures can lead to loss of soft and hard tissue contour or even compromise implant placement. The primary aim of this study was to compare ridge preservation using an intrasocket mineralized particulate cancellous allograft to an intrasocket mineralized particulate cancellous allograft plus a facial overlay with a particulate bovine xenograft, both covered with a bioresorbable barrier membrane. Clinical and histologic data was used to assess the outcomes. Methods. Twelve positive controls received an intrasocket mineralized cancellous particulate allograft 500-800 flm (lntrasocket group) while twelve test patients received an intrasocket mineralized cancellous particulate allograft 500 to 800 flm plus a facial overlay with a particulate bovine xenograft 250-1000 flm (Overlay group). All sites included in the study were covered with a bioresorbable poly (D,L lactic) acid barrier membrane. Only non-molar sites were included bordered with at least one tooth mesially or distally. Following tooth extraction and at 4-month re-entry, horizontal ridge dimensions were measured with a digital caliper and vertical ridge changes were measured from a resin- fabricated stent. Each site was re-entered for implant placement at about 4 months. Prior to implant placement, a 2.7 X 6 mm trephine core was obtained and preserved in formalin for histologic analysis. Results. The mean horizontal crestal ridge width at the crest for the Intrasocket group decreased from 8.7 ± 1.0 mm to 7.1 ± 1.5 mm for a mean loss of 1.6 ± 0.8 mm (p < 0.05) while the Overlay group decreased from 8.4 ± 1.4 mm to 8.1 ± 1.4 mm for a mean loss of 0.3 ± 0.9 mm (p > 0.05). The difference between the two groups was statistically significant (p < 0.05). The mean mid-buccal vertical change for the lntrasocket group was gain of 0.5 ± 2.9 mm (p > 0.05) vs. a gain of OJ ± 2.6 mm for the Overlay group (p > 0.05). There were no statistically significant differences between groups for vertical change (p > 0.05) except for the distal vertical change (p < 0.05). Histologic analysis revealed that the Intrasocket group had 35 ± 16% vital bone, 21 ± 13% non-vital bone, 44 ± 9% trabecular space, while the Overlay group had 40 ± 16% vital