The Universal Bone MILL  

Creates Grafts That Meet

 The Grading Criteria* For 

Impaction Bone Grafting

 Re-milled graft 

 Milled femoral head

Bone:  Bovine femoral head
Blade: The 3mm-8mm 

The Universal Bone Mill curve


Innovative Technology and Design

for Creating Optimal Bone Graft


The design of the Universal Bone mill is based on the  successful design of our HR500 Spinal Bone Mill and the findings of N.T. Brewster et al*. The authors found that the particle size distribution profile of a well-graded bone graft, one having optimal mechanical property, is similar to the Fuller or modified Fuller curve, depicted in the above graph.

Significant innovation was required to meet the Brewster's grading requirements.

As the technology leader in the industry our HR500 Spinal Bone Mill, introduced in 2014, has successfully provided superior bone grafts for patients, in the USA and overseas.

*N.T. BrewsterW.J. Gillespie, C.R. Howie, S.P.G. Madabhushi,



A.S. Usamani,  D.R. Fairbarin. 

Mechanical consideration in Impaction bone grafting. Article in



the Bone and Joint Journal. February 1999.

Bovine femoral bone croutons created with the 8 mm blade and washed with hot water to reveal the aggregates.

The Universal Bone Mill  

 Washed re-milled graft 

 Re-milled graft 

 Milled graft 

The Universal Bone Mill in a THA Lab

The Demonstration

In a gathering of professors and hip surgeons, Cenna Medical had the opportunity to demonstrate the performance capability of The Universal Bone Mill. 

Using reciprocating saw, with three consecutive slices the femoral head was cut in 5 pieces. Using 3-8 mm blade, the cut pieces were milled and re-milled. Milling time was less than 2 seconds per piece.

A portion of the milled graft was washed to reveal the aggregates. 

The outstanding accuracy, speed and milling power of    The Universal Bone Mill for hip surgeons surprised the observers in the THA lab. 

US Patents: 7588202, 8196850, 10258201