Microindentation for In Vivo Measurement of Bone Tissue Mechanical Properties in Humans

2010

Measuring Bone Strength with Microindentation

Sample size: 35 publication 10 minutes Evidence: high

Author Information

Author(s): Diez-Perez Adolfo, Güerri Roberto, Nogues Xavier, Cáceres Enric, Peña Maria Jesus, Mellibovsky Leonardo, Randall Connor, Bridges Daniel, Weaver James C, Proctor Alexander, Brimer Davis, Koester Kurt J, Ritchie Robert O, Hansma Paul K

Primary Institution: Hospital del Mar-IMIM-Universitat Autónoma, Barcelona, Spain

Hypothesis

Can a new microindentation technique accurately measure the mechanical properties of bone tissue in vivo?

Conclusion

The microindentation technique can effectively differentiate between patients with and without fragility fractures, providing a direct measurement of bone tissue resistance to fracture.

Supporting Evidence

The total indentation distance was significantly greater in fracture patients than in controls.
The technique was well tolerated with minimal discomfort.
Interobserver variability was acceptable, ranging from 8.7% to 15.5%.
The area under the ROC curve for total indentation distance was 93.1%.
The study provides a new method for assessing bone quality without invasive procedures.

Takeaway

Doctors can now use a special tool to poke at bones and see how strong they are without needing to take out any bone. This helps them understand if someone is likely to break a bone.

Methodology

The study involved using a reference point indentation instrument to perform bone microindentation testing on 27 women with osteoporosis-related fractures and 8 control subjects.