# Allogeneicic Demineralized Dentin Matrix Graft for Guided Bone Regeneration in Dental Implants
## 3 Results  
A total of 96 surgeries (54 in the maxilla and 42 in the mandible) were performed on 44 and 52 patients with Auto- and Allo-DDM, respectively. The total BMB heights were 10.78 \(\pm\) 1.84,  
Figure 2: Buccal marginal bone (BMB) changes on cone-beam computed tomography (CBCT) images of allogeneic chernized dentin matrix (Allo-DDM) (**a**,**b**,**c**) and autogenous demineralized dentin matrix (Auto-DDM) (**d**,**e**,**f**) at T1 (immediately after implantation), T2 (before prosthetic loading), and T3 (12 months after prosthetic loading). (**a**,**d**) Cross-sectional views at implantation and simultaneous guided bone regeneration (GBR) with Allo-DDM and Auto-DDM. The vertical reference line passed through the middle of the implant from the apex to the center of the cover screw, and the horizontal reference line at the marginal crest of the grafted bone was drawn perpendicular to the vertical line. The BMB height was measured from the apex of the dental implant to the marginal crest of the grafted bone. (**b**,**e**) After 4 months of GBR, initial BMB resorption was measured based on the reference lines. This is the baseline for comparison with functional resorption at 12 months of prosthetic loading. (**c**,**f**) At 12 months after loading, the crest bone around the implant neck showed gradual remodeling with cortical bone formation and developing cancellous bone support. Allo-DDM; allogeneic demineralized dentin matrix; Auto-DDM; autogenous demineralized dentin matrix; BMB, buccal marginal bone; GBR, guided bone regeneration; CBCT, cone-beam computed tomography. \(10.15\pm 1.82\), and \(9.80\pm 1.64\) mm at T1, T2, and T3, respectively. They presented a significant decrease between each stage (\(P<0.001\), Table 1). No significant changes observed in both the sexes and jaws for BMB height (Table 1). According to the types of DDM, the BMB heights were higher in Auto-DDM compared with the Allo-DDM (Table 1). At T1, the BMB heights of Auto-DDM and Allo-DDM were \(11.76\pm 1.84\) and \(10.78\pm 1.45\) mm, respectively (\(P=0.004\)). At T2, the BMB heights of Auto-DDM and Allo-DDM were \(11.09\pm 1.70\) and \(10.45\pm 1.82\) mm, respectively (\(P=0.011\)). At T3, the BMB heights of Auto-DDM and Allo-DDM were \(10.45\pm 1.77\) and \(9.80\pm 1.64\) mm, respectively (\(P=0.065\)). Total initial and functional resorptions were \(0.72\pm 0.86\) and \(0.58\pm 0.70\) mm, respectively, without significant differences between the periods. Both the initial resorption (\(0.73\pm 0.97\) and \(0.72\pm 0.77\) mm; \(P=0.973\)) and functional resorption (\(0.69\pm 0.81\) and \(0.48\pm 0.58\) mm, \(P=0.141\)) were not statistically different between the Auto- and Allo-DDM (Table 2, Figure 3). Concerning the differences between the jaws, the initial resorption on the maxilla (\(0.84\pm 0.98\) mm) was higher than that on the mandible (\(0.58\pm 0.66\) mm) without significance (\(P=0.145\)). However, the functional resorption was similar between the maxilla and mandible (\(0.64\pm 0.76\) and \(0.51\pm 0.61\) mm, \(P=0.374\)) (Table 2, Figure 3). In the maxilla, the resorption of Auto- and Allo-DDM were similar to the initial resorption (\(0.82\pm 1.18\); ranged between 0-2.00 mm and \(0.85\pm 0.78\); ranged between 0-1.80 mm, \(P=0.899\)) and functional resorption (\(0.71\pm 0.90\); ranged between 0-2.00 mm and \(0.57\pm 0.59\) mm; ranged between 0-1.90 mm, \(P=0.502\)). In the mandible, the resorption of Auto- and Allo-DDM was similar at the initial resorption (\(0.59\pm 0.54\); ranged between 0-3.70 mm and \(0.57\pm 0.75\) mm; ranged between 0-1.80 mm, \(P=0.899\)) and functional resorption (\(0.67\pm 0.67\); ranged between 0-3.20 mm and \(0.38\pm 0.55\) mm; ranged between 0-1.80 mm, \(P=0.133\)) (Table 2, Figure 3). \begin{table}