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Maxillofac Plast Reconstr Surg. 2018 Apr 25;40(1):8. doi: 10.1186/s40902-018-0148-2. eCollection 2018 Dec.

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

Author information

1Department of Dentistry, Korea University Anam Hospital, Seoul, Republic of Korea.
2Division of Oral and Maxillofacial Surgery, Department of Dentistry, College of Medicine, Hanyang University, Seoul, Republic of Korea.
3Department of Medicine, Korea University Graduate School, Seoul, Republic of Korea.
4Department of Dentistry, Korea University Ansan Hospital, Ansan-si, Republic of Korea.
5Department of Advanced Prosthodontics, Korea University Anam Hospital, Inchon-ro 73, Seongbuk-gu, Seoul, 02841 Republic of Korea.
Contributed equally



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.


Twenty-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.


The 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.


Bone 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.


Bone graft; Immediate implant; Peri-implant bone change; Primary stability

Conflict of interest statement

The study received approval from the ethics committee of the Korea University Anam Hospital, Seoul, South Korea (AN13025-002). Trial registration: AN13025-002. Registered on February 28, 2013. The first participant enrolled on May 1, 2013.The consent for publication was obtained from all the participants to report their individual data.The authors declare that they have no competing interests.Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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