Abstract:
Objective To evaluate the effect of individualized prosthesis combined with coralline hydroxyapatite (CHA) and recombinant human bone morphogenetic protein-2 (rhBMP-2) on the reconstruction of rabbit mandibular defect with the aid of rapid prototyping (RP) .
Methods The radial defect models were made in 27 rabbits, which were evenly divided into 3 groups randomly. Individualized prostheses were obtained with RP. The 3 groups were treated with different materials: group A, individualized prostheses with autogenous bone; group B, individualized prostheses with CHA; group C, individualized prostheses with CHA and rhBMP-2. The measurement of bone mineral density (BMD) and the detection of osteocalcin (OC) and collagen Ⅰ (COL-1) with immunohistochemical staining were performed in 4, 12, and 24 weeks after the operation so as to compare the capacity of bone reconstruction among the three groups. Data were analyzed with One-Way ANOVA.
Results Both group A (0.537 ± 0.010) and group C (0.530 ± 0.010) showed a large number of trabecular and woven bone, whereas the contents of OC and COL-1 in the defect area were similar (t = 0.007, P>0.05) , both of which were significantly higher than group B (0.415 ± 0.009) (tAB = 0.122, PAB<0.001; tAB = 0.121, PAB<0.001) .
Conclusions Upon the individualized three-dimensional titanium with RP, CHA combined with rhBMP-2 was found to have an improved osteoinductive ability, leading to a satisfactory recovery in both the contour and function of rabbit mandibles, which provided a reliable basis for individualized functional reconstruction of mandibular defects.
Key words:
Mandibular injuries,
Mandibular prosthesis,
Hydroxyapatites,
Recombinant human bone morphogenetic protein-2,
Reverse engineering,
Rapid prototyping
Junlan Chen, Jinan Wu, Wei Peng, Jueyao Chen, Qiaoyi Zheng. An experimental study of rabbit mandibular defect reconstruction with individualized prosthesis and tissue engineering[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2019, 13(06): 328-335.