Effect of hydrothermal surface modification on the biological and mechanical performance of β-TCP scaffolds fabricated by DLP

Effect of hydrothermal surface modification on the biological and mechanical performance of β-TCP scaffolds fabricated by DLP

Článek WoS

Hydrothermal treatment (≈ 180 ℃, > 1 atm) in a slightly acidic medium was used to tailor the surface morphology of β-tricalcium phosphate (β-TCP) scaffolds fabricated by Digital Light Processing (DLP), with the aim of enhancing their biological performance. DLP enabled the production of scaffolds with high geometric accuracy and uniform porosity, while the hydrothermal treatment induced surface transformation through a dissolution–reprecipitation mechanism without altering the bulk composition, which remained predominantly β-TCP after sintering. Moderate hydrothermal treatments (6 h) provided a simple route to develop complex bone scaffolds with surface texture, preserve mechanical strength and improve cellular metabolic activity through defect reduction and moderate surface texturing, with respect to untreated scaffolds. Prolonged treatments resulted in substantial crystal growth, which negatively affected densification unless the sintering temperature was increased. Such temperature increase led to significant microcracking, which degraded the scaffold strength without providing further biological enhancement.

Hydrothermal treatment (≈ 180 ℃, > 1 atm) in a slightly acidic medium was used to tailor the surface morphology of β-tricalcium phosphate (β-TCP) scaffolds fabricated by Digital Light Processing (DLP), with the aim of enhancing their biological performance. DLP enabled the production of scaffolds with high geometric accuracy and uniform porosity, while the hydrothermal treatment induced surface transformation through a dissolution–reprecipitation mechanism without altering the bulk composition, which remained predominantly β-TCP after sintering. Moderate hydrothermal treatments (6 h) provided a simple route to develop complex bone scaffolds with surface texture, preserve mechanical strength and improve cellular metabolic activity through defect reduction and moderate surface texturing, with respect to untreated scaffolds. Prolonged treatments resulted in substantial crystal growth, which negatively affected densification unless the sintering temperature was increased. Such temperature increase led to significant microcracking, which degraded the scaffold strength without providing further biological enhancement.

β-tricalcium phosphate (β-TCP); Digital Light Processing (DLP);Hydrothermal treatment; Bone scaffolds; Mechanical properties; Surface modification

β-tricalcium phosphate (β-TCP); Digital Light Processing (DLP);Hydrothermal treatment; Bone scaffolds; Mechanical properties; Surface modification

PAREDES SÁNCHEZ, C.; ROLEČEK, J.; OLIVER URRUTIA, C.; MAŘÁK, V.; SALAMON, D.; MIRANDA, P.

01.11.2026

Elsevier Ltd

Journal of the European Ceramic Society

46

14

Spojené království Velké Británie a Severního Irska

11

https://www.sciencedirect.com/science/article/pii/S0955221926003900