Influence of guided bone regeneration on marginal bone loss of implants in the mandible posterior region: a 10-year retrospective cohort study
Yang Rui, Zhang Sijia, Song Shuang, Liu Xiangdong, Zhao Guoqiang, Zheng Jian, Zhao Wenshuang, Song Yingliang
Abstract
ObjectiveTo investigate the effect of guided bone regeneration (GBR) on marginal bone loss (MBL) in the region of the mandibular posterior tooth by using a retrospective cohort study, in order to provide reference for clinical practice.
MethodsThe research subjects were patients who received dental implants from October 2008 to June 2011 in the region of the mandibular posterior tooth at the Department of Oral Implantology, School of Stomatology, The Fourth Military Medical University. According to whether GBR was performed or not and the time of implant insertion, the patients were divided into the controls group (patients without bone grafting), simultaneous GBR implantation group, and delayed GBR implantation group. On this basis, the MBL was measured according to radiographs by comparing the marginal bone level from that of immediate postoperation 10 years ago. General data was collected and compared among groups, including modified plaque index (mPI), modified sulcus bleeding index (mSBI), probing depth (PD), and gingival papilla height.
ResultsThe controls group (patients without bone grafting), implantation group, and delayed GBR implantation group followed 58, 76, 26 implants in 26, 32, 13 patients aging at (46.5±9.9), (45.5±10.7), (58.3±6.4) respectively. The duration of the follow-up was (11.2±0.7), (11.1±0.8), (11.1±0.9) years respectively. The 10-year implant survival rate was 100% (58/58), 100% (76/76), 100% (26/26). The MBL was (0.91±0.28), (0.84±0.27), (1.01±0.27) mm respectively. The MBL difference of patients with simultaneous GBR implantation and delayed GBR implantation showed statistical significance (P<0.05), but these two groups showed no statistical significance compared with the controls group (P>0.05). The mPI, mSBI, PD, and gingival papilla height of the three groups all had no significance on statistics (P>0.05).
ConclusionsIt can be concluded that there is no difference in long-term marginal bone resorption between simultaneous and delayed implantation with or without GBR (using autologous blood mixed with granular bone meal) in the posterior mandibular area.
Key words:
Dental implantation; Alveolar bone loss; Cohort studies; Follow-up studies; Guided bone regeneration
Contributor Information
Yang Rui
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Zhang Sijia
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Song Shuang
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Liu Xiangdong
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Zhao Guoqiang
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Zheng Jian
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Zhao Wenshuang
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
Song Yingliang
Department of Dental Implantology, School of Stomatology, The Fourth Military Medical University &
State Key Laboratory of Military Stomatology &
National Clinical Research Center for Oral Diseases &
Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
