Histological Evaluation of Bone Repair with Hydroxyapatite: A Systematic Review

Abstract

The aim of this study was to evaluate the morphological bone response in animal experiments by applying hydroxyapatite grafts in critical and non-critical size bone defects. Current report followed the guidelines established by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Animal experiments were selected by assessing repair of bone defects with hydroxyapatite as bone graft and with blood clot only as control. Eight articles were identified in specialized literature and included in the meta-analysis. Statistical analysis was carried out with a random-effect model (p = 0.05). Subgroup analyses were further performed to investigate bone repair in critical and non-critical bone defects. Comprehensive analysis of bone repair outcome showed a statistically significant difference between hydroxyapatite and blood clot control (p < 0.05). Subgroup analyses showed statistically significant difference for critical bone defects (p < 0.05). No statistically significant difference was reported in non-critical bone defects (p > 0.05). Although animal studies revealed a high risk of bias and results should be interpreted with caution, the literature suggests that non-critical bone defects may heal spontaneously and without the need of a bone graft. Conversely, when critical-size defects are present, the use of hydroxyapatite bone graft improves the bone repair process.

The mineralization, drug release and in vivo bone defect repair properties of calcium phosphates/PLA modified tantalum scaffolds

“…17,18 CaP based biomaterials and their composites have been extensively employed in various biomedical areas, such as drug delivery, [19][20][21] protein adsorption, 22 bioimaging, 23,24 bone defect repair/tissue engineering. 25,26 For example, CaP coated metallic scaffolds are considered as the promising weight bearing implants owing to their advantages of high biocompatibility and strength. [27][28][29] Meanwhile, in previous studies, the protein drugs of growth factors, such as, morphogenetic protein (BMP), vascular endothelial growth factor (VEGF), basic broblast growth factor (bFGF) and transforming growth factor-beta (TGF-b), were adopted and loaded in CaP materials to prepare biomaterials which are favorable for bone defect repair.…”

Synergic effects of decellularized bone matrix, hydroxyapatite, and extracellular vesicles on repairing of the rabbit mandibular bone defect model

“…Laminin also has several roles in cell migration, survival, attachment, and promotes osteogenic differentiation [ 28 ]. Collagen I, GAG, fibronectin [ 29 ] and HA [ 30 ] also promote the bone repair and remodeling. We showed that the number of osteocytes and bone area increased significantly in the defect treated with DC + HA scaffold compared to the untreated control defect.…”

Synergic effects of decellularized bone matrix, hydroxyapatite, and extracellular vesicles on repairing of the rabbit mandibular bone defect model

“…Laminin also has several roles in cell migration, survival, attachment, and promotes osteogenic differentiation [28]. Collagen I, GAG, bronectin [29] and HA [30] also promote the bone repair and remodeling. We showed that the number of osteocytes and bone area increased signi cantly in the defect treated with DC+HA scaffold compared to the untreated control defect.…”