Updated: Jun 16, 2026

Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
Published on: February 23, 2017
Junling Zhang1, Dongliang Jiang, Jingxian Zhang
1The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, China.
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This study explores a new method to create synthetic hydroxyapatite that resembles natural dental enamel. Using organic phosphate surfactant and gelatin, researchers produced nanorods arranged in parallel arrays, similar to those found in human teeth. Transmission electron microscopy confirmed the uniform size and alignment of these nanorods. The findings suggest a potential pathway for understanding how natural enamel forms and could lead to improved biomaterials for medical and dental applications.
Area of Science:
Background:
Current research on biomaterials synthesis often focuses on replicating natural structures to improve material performance. Prior studies have shown that natural dental enamel contains highly ordered hydroxyapatite nanorods arranged in parallel arrays. However, that uncertainty drove the need to develop a method for synthesizing enamel-like hydroxyapatite with similar structural properties. No prior work had resolved how to control the orientation and size of HAp nanorods during synthesis. Understanding biomineralization processes remains a key challenge in materials science. The ability to mimic natural enamel structures could enhance biomaterial applications. Existing methods lack precise control over nanorod alignment and size. This gap motivated the exploration of solution-mediated solid-state conversion techniques. The goal is to achieve synthetic structures comparable to natural enamel.
Purpose Of The Study:
This study aimed to develop a method for synthesizing dental enamel-like hydroxyapatite with controlled nanorod orientation and size. The specific problem addressed is the lack of precise control over structural organization in synthetic HAp. The motivation stems from the need for high-performance biomaterials that mimic natural enamel. The study focuses on using a solution-mediated solid-state conversion process. Organic phosphate surfactant and gelatin were selected as mediating agents. The objective is to achieve a structure similar to natural enamel. The process aims to produce nanorods arranged in parallel arrays. This approach could improve understanding of biomineralization mechanisms.
The study produced enamel-like hydroxyapatite nanorods with uniform size and c-axis alignment.
Gelatin acts as a mediating agent to facilitate the formation of aligned hydroxyapatite nanorods.
C-axis alignment mimics the natural organization of enamel, potentially improving biomaterial performance.
Transmission electron microscopy (TEM) was used to assess nanorod size and arrangement.
The study reports microarchitectural units over 10 micrometers in size, similar to natural enamel.
Main Methods:
The synthesis process involved a solution-mediated solid-state conversion method. Organic phosphate surfactant and gelatin were used as mediating agents. The reaction conditions were controlled to facilitate nanorod formation. Transmission electron microscopy (TEM) was employed to analyze the resulting structures. The study focused on the orientation and size of the hydroxyapatite nanorods. The nanorods were examined for alignment along the c-axis. The size distribution of the nanorods was measured and compared to natural enamel. The method's effectiveness was assessed by comparing synthetic and natural structures.
Main Results:
The synthetic hydroxyapatite nanorods formed with uniform sizes and aligned along the c-axis. TEM tests showed parallel arrangement of the nanorods in organized microarchitectural units. The size of the nanorods matched that observed in human dental enamel. The microarchitectural units exceeded 10 micrometers in size. The orientation and size regulation of the nanorods were successfully achieved. The synthetic structures closely resembled natural enamel organization. The use of organic phosphate surfactant and gelatin was critical for this outcome. These results suggest a viable method for mimicking enamel biomineralization.
Conclusions:
The study demonstrated that a solution-mediated solid-state conversion process can produce enamel-like hydroxyapatite structures. The authors propose that this method enables precise control over nanorod orientation and size. The synthetic structures closely resemble natural enamel in terms of arrangement and size. The use of organic phosphate surfactant and gelatin was essential for achieving these results. The findings suggest a potential pathway for understanding biomineralization processes. The method may lead to the development of high-performance biomaterials. The results align with the goal of mimicking natural enamel structures. This approach could enhance biomaterial applications in dental and medical fields.
The authors suggest this method could enhance understanding of biomineralization and biomaterial design.