Clinical evaluation of implants placed within or beyond the boundaries of the alveolar ridge preservation:a retrospective case series with 10weeks of observations in 28 patients
- Author:
Young-Chang KO
1
;
Ki-Tae KOO
;
Ling LI
;
Dongseob LEE
;
Yong-Moo LEE
;
Yang-Jo SEOL
;
Tae-Hyung KIM
;
Jungwon LEE
Author Information
- Publication Type:Research Article
- From:Journal of Periodontal & Implant Science 2025;55(1):50-61
- CountryRepublic of Korea
- Language:English
-
Abstract:
Purpose:This study investigated the effect of implant vertical positioning within alveolar ridge preservation (ARP) sites on implant stability quotient (ISQ) values, which were measured 10 weeks post-implantation.
Methods:Patients who underwent ARP using collagenized deproteinized bovine bone mineral, followed by implant placement in the posterior area, were divided into 2 groups:the within-ARP group and the beyond-ARP group. In the within-ARP group, osteotomy and implant placement occurred within the ARP boundary. In contrast, in the beyond-ARP group, these procedures were performed beyond the ARP boundary, incorporating 3 mm of pristine bone at the implant’s apex. Bone quality was assessed by tactile sense, and both insertion torque during implant surgery and ISQ values at 10 weeks post-implant surgery were measured. Multiple linear regression analysis and Pearson correlation analysis were used to explore the relationship between insertion torque and ISQ values.
Results:In total, 30 ARP sites in 28 patients were analyzed. There was no significant difference in bone quality, as determined by tactile sense, between the within-ARP and beyond-ARP groups. At the time of implant placement, the beyond-ARP group exhibited a higher insertion torque (33.33±13.39 Ncm) compared to the within-ARP group (17.08±11.17 Ncm). However, the ISQ values were similar between the 2 groups 10 weeks after implant placement. A positive correlation between insertion torque and ISQ values was confirmed at 10 weeks post-implant.
Conclusions:The engagement of pristine bone may facilitate high insertion torque during the placement of implants in ARP sites. Nevertheless, by 10 weeks post-implantation, the ISQ values were found to be comparable, irrespective of the implant’s position.
