The influence of bone graft procedures on primary stability and bone change of implants placed in fresh extraction sockets

Sang Ho Jun,Cong Zhou,Chang-Joo Park,Hyon-Seok Jang,Suk-Hyun Hwang,Youn Ki Lee,Jae-Jun Ryu

doi:10.1186/s40902-018-0148-2

Abstract

BackgroundThis study was to evaluate the effect of bone graft procedure on the primary stability of implants installed in fresh sockets and assess the vertical alteration of peri-implant bone radiographically.MethodsTwenty-three implants were inserted in 18 patients immediately after tooth extraction. The horizontal gap between the implant and bony walls of the extraction socket was grafted with xenografts. The implant stability before and after graft procedure was measured by Osstell Mentor as implant stability quotient before bone graft (ISQ bbg) and implant stability quotient after bone graft (ISQ abg). Peri-apical radiographs were taken to measure peri-implant bone change immediately after implant surgery and 12 months after implant placement. Data were analyzed by independent t test; the relationships between stability parameters (insertion torque value (ITV), ISQ abg, and ISQ bbg) and peri-implant bone changes were analyzed according to Pearson correlation coefficients.ResultsThe increase of ISQ in low primary stability group (LPSG) was 6.87 ± 3.62, which was significantly higher than the increase in high primary stability group (HPSG). A significant correlation between ITV and ISQ bbg (R = 0.606, P = 0.002) was found; however, age and peri-implant bone change were not found significantly related to implant stability parameters. It was presented that there were no significant peri-implant bone changes at 1 year after bone graft surgery.ConclusionsBone graft procedure is beneficial for increasing the primary stability of immediately placed implants, especially when the ISQ of implants is below 65 and that bone grafts have some effects on peri-implant bone maintenance.

Highlights

This study was to evaluate the effect of bone graft procedure on the primary stability of implants installed in fresh sockets and assess the vertical alteration of peri-implant bone radiographically
It is shown that a marked reduction of the height of the alveolar ridge consistently occurred following tooth extraction and that implant installation in the fresh extraction socket did not interfere with the process of bone modeling [11]
Statistical correlations among variables There was a significant correlation between insertion torque value (ITV) and Implant stability quotient (ISQ) bbg (R = 0.606; P = 0.002) (Fig. 2)

Summary

Introduction

This study was to evaluate the effect of bone graft procedure on the primary stability of implants installed in fresh sockets and assess the vertical alteration of peri-implant bone radiographically. It is shown that a marked reduction of the height of the alveolar ridge consistently occurred following tooth extraction and that implant installation in the fresh extraction socket did not interfere with the process of bone modeling [11]. Implant primary stability and spontaneous bone graft after immediate implantation are important factors for high success rates and esthetic outcomes, the relationship between them has not been sufficiently evaluated. The aim of the present study was to evaluate the effect of bone graft after immediate implant placement in fresh extraction socket

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