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A study on the mechanical characteristics of the EBM-printed Ti-6Al-4V LCP plates in vitro.

Liu PC, Yang YJ, Liu R, Shu HX, Gong JP, Yang Y, Sun Q, Wu X, Cai M - J Orthop Surg Res (2014)

Bottom Line: The results show significant differences in bending stiffness, bending strength, bending structural stiffness, and hardness between the samples using EBM and the original LCP plates.The EBM samples' bending stiffness was 87.67%, which is greater than using the LCP plates'; and the bending strength was 190.7% greater, the bending structural stiffness was 73.2% greater, and the hardness was 27.9% greater.The results show that the EBM plates' general mechanical strength was significantly greater than the LCP plates.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No,301, Middle Yanchang Road, Shanghai 200072, China. orthopedics_dsyy@126.com.

ABSTRACT

Purpose: The electron beam melting (EBM) Ti-6Al-4V material technology has been developed over a short time period. It was introduced through a research to develop Ti-6Al-4V implants for patients, but EBM printed locking compression plates have not been used for clinical implants. The main purpose of this study is to find whether the EBM Ti-6Al-4V plate suit for clinical implants.

Methods: First, we scanned an AO-locking compression plate (LCP) and printed LCP samples using EBM. Next, we evaluated the EBM plate surface roughness through optical microscopy as well as the LCP and EBM plates' mechanical characteristics using the ASTM standard, which is commonly used to test the mechanical properties of bone plates subject to bending. Each sample was examined using a single-cycle four-point bending test and hardness testing to acquire data on bending stiffness, bending strength, bending structural stiffness, and hardness.

Results: The results show significant differences in bending stiffness, bending strength, bending structural stiffness, and hardness between the samples using EBM and the original LCP plates. The EBM-printed samples' surface roughness was 0.49 ± 0.02 μm. The mean hardness of the LCP sample was 266.67 HV10 ± 5.8, and the EBM-printed sample mean hardness was 341.1 HV10 ± 1.93. The EBM samples' bending stiffness was 87.67%, which is greater than using the LCP plates'; and the bending strength was 190.7% greater, the bending structural stiffness was 73.2% greater, and the hardness was 27.9% greater.

Conclusions: The results show that the EBM plates' general mechanical strength was significantly greater than the LCP plates. An EBM plate is advantageous for clinical implants because it can be customized with great potential for improvement.

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Related in: MedlinePlus

The EBM sample surface at 35X (a) and 140X (b) magnifications.
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Fig2: The EBM sample surface at 35X (a) and 140X (b) magnifications.

Mentions: Optical microscopy was used to visualize the sample surface and record the roughness; the EBM sample surface was visualized at 35X (Figure 2a) and 140X (Figure 2b) magnifications through imaging microscopy (KH-8700 Tokyo Japan). The lens used was MXG-2500REZ. To determine the roughness and due to the sample size, the samples were indented at three different locations (Figure 3); the roughness was examined using microscopy (n =9).Figure 2


A study on the mechanical characteristics of the EBM-printed Ti-6Al-4V LCP plates in vitro.

Liu PC, Yang YJ, Liu R, Shu HX, Gong JP, Yang Y, Sun Q, Wu X, Cai M - J Orthop Surg Res (2014)

The EBM sample surface at 35X (a) and 140X (b) magnifications.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4221727&req=5

Fig2: The EBM sample surface at 35X (a) and 140X (b) magnifications.
Mentions: Optical microscopy was used to visualize the sample surface and record the roughness; the EBM sample surface was visualized at 35X (Figure 2a) and 140X (Figure 2b) magnifications through imaging microscopy (KH-8700 Tokyo Japan). The lens used was MXG-2500REZ. To determine the roughness and due to the sample size, the samples were indented at three different locations (Figure 3); the roughness was examined using microscopy (n =9).Figure 2

Bottom Line: The results show significant differences in bending stiffness, bending strength, bending structural stiffness, and hardness between the samples using EBM and the original LCP plates.The EBM samples' bending stiffness was 87.67%, which is greater than using the LCP plates'; and the bending strength was 190.7% greater, the bending structural stiffness was 73.2% greater, and the hardness was 27.9% greater.The results show that the EBM plates' general mechanical strength was significantly greater than the LCP plates.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No,301, Middle Yanchang Road, Shanghai 200072, China. orthopedics_dsyy@126.com.

ABSTRACT

Purpose: The electron beam melting (EBM) Ti-6Al-4V material technology has been developed over a short time period. It was introduced through a research to develop Ti-6Al-4V implants for patients, but EBM printed locking compression plates have not been used for clinical implants. The main purpose of this study is to find whether the EBM Ti-6Al-4V plate suit for clinical implants.

Methods: First, we scanned an AO-locking compression plate (LCP) and printed LCP samples using EBM. Next, we evaluated the EBM plate surface roughness through optical microscopy as well as the LCP and EBM plates' mechanical characteristics using the ASTM standard, which is commonly used to test the mechanical properties of bone plates subject to bending. Each sample was examined using a single-cycle four-point bending test and hardness testing to acquire data on bending stiffness, bending strength, bending structural stiffness, and hardness.

Results: The results show significant differences in bending stiffness, bending strength, bending structural stiffness, and hardness between the samples using EBM and the original LCP plates. The EBM-printed samples' surface roughness was 0.49 ± 0.02 μm. The mean hardness of the LCP sample was 266.67 HV10 ± 5.8, and the EBM-printed sample mean hardness was 341.1 HV10 ± 1.93. The EBM samples' bending stiffness was 87.67%, which is greater than using the LCP plates'; and the bending strength was 190.7% greater, the bending structural stiffness was 73.2% greater, and the hardness was 27.9% greater.

Conclusions: The results show that the EBM plates' general mechanical strength was significantly greater than the LCP plates. An EBM plate is advantageous for clinical implants because it can be customized with great potential for improvement.

Show MeSH
Related in: MedlinePlus