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Journal of Molecular and Clinical Medicine  2018, Vol. 1 Issue (3): 169-176    DOI: 10.31083/j.jmcm.2018.03.006
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Lateral Guided Bone Regeneration Using a Novel Synthetic Bioresorbable Membrane: A Two Center Prospective Randomized Controlled Trial Running title: A novel membrane for ridge augmentation
Michal Halperin-Sternfeld1, 2, *(), Hadar Zigdon-Giladi1, 3, Lior Shapira4, Asaf Wilensky4
1 Department of periodontology, School of Graduate Dentistry, Rambam Health Care Campus, Haifa 31096, Israel
2 Department of Oral Biology, The Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
3 Faculty of Medicine, Technion -- Israel Institute of Technology, Haifa, 31096, Israel
4 Department of Periodontology, Faculty of Dental Medicine, Hebrew University and Hadassah Medical Center, Jerusalem 91120, Israel
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The aim of this study was to evaluate the outcomes of lateral guided bone regeneration (GBR) using a novel resorbable synthetic polyethylene-glycol/methacrylate (PEG/MET) membrane compared to a non-cross-linked collagen membrane (CM). Twenty-eight patients with a potential implant site exhibiting insufficient bone width of $\leq$ 5 mm were included. Ridge width was measured intraoperatively at 1 mm and 4 mm apical to the crest and via cone-beam computed tomography at baseline and 6 months following GBR using either a PEG/MET or a CM in conjunction with an allograft. During implant placement, core biopsies were harvested and analyzed histomorphometrically. Width changes were calculated. Differences between groups were analyzed using two-sided t-test and Mann-Whitney U-test. The PEG/MET membrane was moldable and exhibited higher strength and stability compared to the CM. Nevertheless, it displayed higher exposure rate of 12/15, compared to 2/13 in the CM sites. At the time of implant insertion, 6 months following GBR, significant gain in bone width was observed in both groups. Mean ridge width at 1 mm and 4 mm apical to the crest was increased significantly from 2.06 $\pm$ 0.77 mm and 3.84 $\pm$ 1.23 mm to 3.84 $\pm$ 1.52 mm and 6.06 $\pm$ 2.03 mm ($p=$ 0.0006 and $p=$ 0.0009, respectively), with no clinical or radiographic differences between groups. Experimental sites contained more residual scaffold material than the controls (17.4 $\pm$ 3.3% and 8.6 $\pm$ 2.0%, $p=$ 0.0566). However, bone and connective tissue area fraction were not statistically different between the groups. Overall, despite the higher exposure rate, the new PEG/MET membrane was as successful as a standard collagen membrane in lateral GBR and may have potential use in bone augmentation procedures. This study suggests the feasibility of synthetic membranes, which are not associated with disease transmission, as an attractive alternative to the commonly used CM of bovine or porcine origin.

Key words:  Alveolar ridge reconstruction      Bone augmentation      Guided bone regeneration      Randomized controlled trial      Bioresorbable membrane     
Submitted:  15 July 2018      Revised:  17 August 2018      Accepted:  24 August 2018      Published:  20 September 2018     
*Corresponding Author(s):  Michal Halperin-Sternfeld     E-mail:

Cite this article: 

Michal Halperin-Sternfeld, Hadar Zigdon-Giladi, Lior Shapira, Asaf Wilensky. Lateral Guided Bone Regeneration Using a Novel Synthetic Bioresorbable Membrane: A Two Center Prospective Randomized Controlled Trial Running title: A novel membrane for ridge augmentation. Journal of Molecular and Clinical Medicine, 2018, 1(3): 169-176.

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Fig. 1.  Clinical photographs illustrate the treatment rendered to the experimental group. (a) Insuffiecint alveolar bone ridge of 3 mm at baseline. (b, c) AMCA RegeneCure? barrier membrane before and after trimming. (d) Decortication of the buccal cortical plate. (e) Anchorage of AMCA RegeneCure? barrier membrane with a tack. (f) Application of OraGRAFT? Cortical particulate mineralized FDBA, LifeNet. (g) Placement of AMCA RegeneCure? barrier membrane over the bone substitute. (h) Augmentation site closure using ePTFE sutures.

Table 1  Clinical and radiographic horizontal alveolar ridge width at baseline and 6 months following augmentation
Variable Mean (mm) S.D. (mm) Minimum (mm) Maximum (mm) Median (mm)
Baseline clinical bone width at 1 mm 2.06 0.77 1.0 3.0 2.0
Baseline clinical bone width at 4 mm 3.84 1.23 2.0 6.0 4.0
Final clinical bone width at 1 mm 3.84 1.52 1.5 7.5 3.75
Final clinical bone width at 4 mm 6.06 2.03 2.0 11.0 6.0
Baseline radiographic width at 1 mm 2.86 1.24 1.0 6.0 3.0
Baseline radiographic width at 4 mm 4.77 1.49 2.0 5.0 7.0
Final radiographic width at 1 mm 4.75 1.49 2.0 8.0 5.0
Final radiographic width at 4 mm 7.04 1.93 3.0 7.25 11.5
Table 2  Clinical and radiographic horizontal alveolar ridge width and the change 6 months following augmentation
Variable N Mean baseline (士 SE) mm Mean final(士 SE) mm Mean changes (士 SE) mm p-value*
Clinical bone width at 1 mm 16 2.06 士 0.19 3.84 士 0.38 1.78 士 0.41 0.0006
Clinical bone width at 4 mm 16 3.84 士 0.31 6.06 士 0.51 2.22 士 0.54 0.0009
Radiographic bone width at 1 mm 28 2.86 士 0.23 4.75 士 0.28 1.89 士 0.29 0.0001
Radiographic bone width at 4 mm 28 4.77 士 0.28 7.04 士 0.36 2.27 士 0.32 0.0001
Table 3  Clinical and radiographic changes in alveolar ridge width: Comparison between treatment groups
Variable Mean (士 SE)changes N Mean (士 SE) changes (mm) N p-value*
experimental group control group
Clinical bone width change at 1 mm 2.00 士 0.60 8 1.56 士 0.59 8 0.5215
Clinical bone width change at 4 mm 2.06 士 0.68 8 2.19 士 0.71 8 1.000
% Clinical bone width change at 1 mm 144.8 士 59 8 86.5 士 29 8 0.7105
% Clinical bone width change at 4 mm 60.13 士 26 8 53.75 士 29 8 0.7518
Radiographic width change at 1 mm 1.80 士 0.43 15 2.00 士 0.42 13 0.6243
Radiographic width change at 4 mm 1.90 士 0.41 15 2.69 士 0.50 13 0.2650
% Radiographic width change at 1 mm 106.6 士 39 15 90.4 士 22.5 13 0.4730
% Radiographic width change at 4 mm 51.60 士 15.6 15 65.7 士 15.8 13 0.1645
Fig. 2.  A representative image of H&E histological slide obtained from control group (scale bar 500 $\mu $m). Intimate contact between newly formed vital bone (arrow pointing on osteocytes) and residual scaffold (asterisk) was observed. Bone marrow (BM) spaces were also present.

Fig. 3.  Nonspecific inflammatory infiltrate was observed in the connective tissue (coronal part) of two biopsies obtained from the experimental group.

Table 4  Comparison between treatment groups: Histological variables
Variable Mean 士 sechangesexperimentalgroup N Mean 士 SE changes control group N p-value*
% Vital bone 58.1 士 7.9 7 53.3 士 6.7 9 0.5245
% Residual scaffold 17.4 士 3.3 7 8.6 士 2.0 9 0.0566
% Connective tissue 4.7 士 4.7 7 14.3 士 6.8 9 0.2467
% Bone marrow 7.1 士 3.3 7 7.3 士 5.2 9 0.5598
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