Intratrabecular bone remodeling—a previously overlooked mode of remodeling hyperactivated by parathyroid hormone
Authors' conclusion
This study demonstrates that intratrabecular tunneling is a previously unrecognized physiological mode of intratrabecular bone remodeling occurring across conditions and ages.
Study context
- Population
- Patients with hypoparathyroidism (iliac crest bone biopsies); extension study with conventional treatment only, continued or discontinued rhPTH
- Comparison
- rhPTH 100μg daily vs placebo, add-on to conventional therapy
- Outcome
- Intratrabecular porosity and pore types
- Follow-up
- 6 months
Methodological detailshistomorphometry of iliac crest biopsies from a randomised placebo-controlled trial and a 24-month open-label extension, rabbit model with time-lapsed synchrotron radiation μCT, micro-finite-element analysis
- Histomorphometry of iliac crest biopsies from a randomised placebo-controlled trial and a 24-month open-label extension
- Rabbit model with time-lapsed synchrotron radiation μCT
- Micro-finite-element analysis
Main finding
As reported in the abstract
6 months
- Increase in intratrabecular porosity with PTH-treatment after 6 and 30 months
- 18-fold and 36-fold
- Eroded pores, PTH vs conventional treatment (median)
- 7.7% vs 0.0%
- Eroded-formative pores, PTH vs conventional treatment (median)
- 69.1% vs 0.0%
- Formative pores, PTH vs conventional treatment (median)
- 12.9% vs 0.0%
- Quiescent pores, PTH vs conventional treatment (median)
- 0.9% vs 81.2%
Further findings
PTH-treatment withdrawal
- Withdrawal normalized intratrabecular remodeling to levels similar to conventional therapy
Location of intratrabecular remodeling
- Mainly in plates and junctions of trabeculae, not in trabecular rods
Correlations
- Positive correlation with PTH-induced trabecular mineralization; negative correlation with active vitamin D-supplementary doses
Original publication
Intratrabecular bone remodeling—a previously overlooked mode of remodeling hyperactivated by parathyroid hormone. J Bone Miner Res. Published 25 April 2026. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →