China Journal of Oral and Maxillofacial Surgery ›› 2014, Vol. 12 ›› Issue (2): 144-151.

• Clinical Articles • Previous Articles     Next Articles

A clinical study of anterior alveolar bone reconstruction achieved through autogenous block bone in combination with guided bone regeneration(GBR) technique

ZHENG Ji-si1, ZHANG Shan-yong1, YANG Chi1, ZHANG Ying1, ZHAO Jing-yong2, YU Fei3   

  1. 1.Department of Oral Surgery, Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology. Shanghai 200011;
    2.Department of Oral Implantology, Hospital Affiliated to Qingdao University School of Medicine. Qingdao Shandong 266100;
    3.College of Basic Medicine, Shanghai Jiao Tong University School of Medicine. Shanghai 200011, China
  • Received:2013-03-25 Revised:2013-11-21 Online:2014-03-10 Published:2014-11-06
  • Supported by:
    Research Fund of Science and Technology Committee of Shanghai Municipality (134119a5400); The Seventh College Students Innovation Training Program of Shanghai Jiao Tong University School of Medicine (2013061).

Abstract: PURPOSE: To evaluate and compare the differences of bone resorption between implant placement sites (IPS) and non-implant placement sites(NIPS) after anterior alveolar bone reconstruction achieved through autogenous block bone in combination with guided bone regeneration(GBR) technique. METHODS: From Dec. 2010 to Aug. 2011, a consecutive series of 14 patients (73 edentulous sites) with anterior alveolar bone atrophy were treated with autogenous block bone grafts in combination with GBR technique and delayed implant placement 6 months after augmentation. CT scans were performed preoperatively(T0), immediately after augmentation(T1), 3 months after augmentation (T2), 6 months after augmentation before implant placement (T3), 9 months after augmentation (T4), and the longest postoperative follow-up point (mean. 13.8 months) (T5). Alveolar crestal bone height (ACBW), alveolar midway bone width (AMBW), and alveolar bone height (ABH) were selected as measurement parameters in Simplant 11.04 software. All results were divided into two groups: implant placement sites (IPS) and non-implant placement sites (NIPS), and compared by the paired t test using SAS 9.0 software package. RESULTS: All block bone grafts and implant placement surgeries were completed successfully. Dizziness, headache and other uncomfortable conditions didn't occur and the incisions healed excellently. All implants remained clinically osseointegrated at the longest postoperative follow-up point. The bone remodelling of both groups for these three parameters were as follows: a) there were significant differences for the bone augmentation and resorption of ACBW and AMBW at T1 and T2 (P<0.05) and ABH at T1, T2 and T3 (P<0.05) in IPS; b) there were significant differences for the bone augmentation and resorption of ACBW and ABH at T1, T2, T3 and T4 (P<0.05) and AMBW at T1, T2 and T3 (P<0.05) in NIPS; c) there were no significant differences at other time periods for these three parameters of both groups (P>0.05). CONCLUSIONS: A more rapid and initial loss of alveolar bone in NIPS resulted from the mucoperiosteal flap reflection during implant placement surgery, while a less bone loss of alveolar happened in IPS due to implant placement. This reminded us of the importance of bone grafts in combination with immediate or early implant placement.

Key words: Bone deficiency, Implant surgery, Block bone, Bone remodelling

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