Abstract
BackgroundThe purposes of the present study were to compare implant stabilities of mandibular block bone graft and bovine bone graft and to evaluate influencing factors for implant stability in mandibular block bone (MBB) graft.MethodsThis retrospective study investigated 1224 cases and 389 patients treated by one surgeon in the Department of Oral and Maxillofacial Surgery of Pusan National University Dental Hospital (Yangsan, Korea) between January 2010 and December 2014. Proportions that MBB graft cases constitute in all implant restoration cases and in all bone graft cases were measured. Implant stability quotient (ISQ) values were achieved by the same surgeon before loading. The average ISQ values of the experimental groups were compared. In addition, ISQ values of influencing factors, such as age, sex, implant size, and implant placement site, were compared within the MBB group using OsstellTM Mentor (Osstell®, Göteborg, Sweden). Paired t test and ANOVA were conducted for statistical analysis with a significance level of 0.05.ResultsFifty-five percent of all implant restoration cases performed bone graft while MBB cases constituted 34% of all implant restoration cases and 61% of all bone graft cases. Comparing ISQ values according to bone graft materials, the MBB group manifested sufficient implant stability by presenting comparable ISQ value to that of the experimental group without bone graft. Among the reviewed factors, females, mandibular molar regions, and implants in larger diameter displayed greater implant stabilities.ConclusionsSatisfactory implant stability was accomplished upon administration of MBB graft. Within the limitation of this study, gender, implant site, and implant diameter were speculated to influence on implant stability in MBB graft.
Highlights
The purposes of the present study were to compare implant stabilities of mandibular block bone graft and bovine bone graft and to evaluate influencing factors for implant stability in mandibular block bone (MBB) graft
In the comparison of Implant stability quotient (ISQ) values according to bone graft materials (Table 1), the group without bone grafting presented the highest ISQ while the bovine bone group showed the lowest ISQ among the three experimental groups
No significant difference was demonstrated between the group without bone graft and the MBB group
Summary
The purposes of the present study were to compare implant stabilities of mandibular block bone graft and bovine bone graft and to evaluate influencing factors for implant stability in mandibular block bone (MBB) graft. The traditional surgical methods with alveolar bone augmentation pose limitations on improving volumetric stability and implant stability. For patients with jawbone atrophy, an additional surgical procedure is inevitable to ensure sufficient amount of bone for implant installation. Autogenous bone grafts can be commonly harvested from various donor sites including the calvarium bone and iliac bone [1,2,3,4]. The mandibular bone has been widely adopted since it allows better accessibility, less scarring, and adequate harvest for implant installation [5]. Few studies have studied the initial stability of implants installed after performing mandibular body bone graft, and a few studies have conducted statistical evaluation on a number of cases
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