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Related Experiment Video

Updated: Jun 4, 2026

Biological Compatibility Profile on Biomaterials for Bone Regeneration

Published on: November 16, 2018

Interfacial pH: a critical factor for osteoporotic bone regeneration.

Yuhui Shen¹, Waiching Liu, Kaili Lin

¹Department of Orthopaedics, Shanghai Institute of Orthopaedics & Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine , China.

Langmuir : the ACS Journal of Surfaces and Colloids

|February 12, 2011

Summary

Alkaline conditions at implant surfaces significantly enhance osteoblast function, crucial for bone regeneration. This study highlights interfacial pH, not bulk pH, as key for biomaterial success in bone tissue engineering.

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Last Updated: Jun 4, 2026

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Published on: November 16, 2018

Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect

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Multimodal Approach to Assess Bone Regeneration and Scaffold Performance

Multimodal Approach to Assess Bone Regeneration and Scaffold Performance

Published on: February 13, 2026

Area of Science:

Biomaterials Science
Cell Biology
Tissue Engineering

Background:

Osteoporosis involves osteoblast and osteoclast imbalance, potentially due to acidic microenvironments.
The role of implant material surface chemistry and local pH in bone cell function is often overlooked.
Biomaterial degradation can alter local ion concentrations and pH, impacting cell responses.

Purpose of the Study:

To investigate the effect of strontium-containing calcium silicate (Sr-CaSiO3) degradation on interfacial pH.
To determine the impact of altered interfacial pH on osteoblast proliferation and alkaline phosphatase (ALP) activity.
To establish the significance of solid-liquid interface chemistry in bone regeneration.

Main Methods:

Synthesized Sr-containing CaSiO3 biomaterials with varying Sr substitution levels.
Measured interfacial pH at the material surface after degradation in cell culture medium.
Assessed osteoblast proliferation and ALP activity at different interfacial pH values.

Main Results:

Degradation of Sr-CaSiO3 resulted in an elevated interfacial pH (> 7.4).
Osteoblast proliferation and ALP activity were significantly enhanced at pH > 8.
A maximum enhancement was observed at 10% Sr substitution for Ca.

Conclusions:

The interfacial pH, rather than bulk pH, is a critical factor influencing osteoblast response.
Alkaline interfacial conditions promote bone regeneration.
This finding has implications for designing biomaterials in bone tissue engineering.