About Cenna Medical

The Origin of Cenna Medical Bone Milling Technology

Realizing that there was a need for a better bone mill, we listened to the surgeons and experts, and we heard, for example:

  • A prominent spine surgeon said, "We keep explaining to the industry what we need. The industry keeps offering mush makers.“

  • Another spine surgeon complained, "We do not use their 3mm blade because it produces excessive bone flakes.“

  • Another spine surgeon described the ideal bone graft for spinal fusion as "graft with the consistency of hamburger,  with bone particles.“

  • An experienced hospital operating room builder said, "Not another electric cord in an already cluttered operating room, tripping and falling. Make it battery powered.“

Searching for required particle size and distribution profile, we found the characteristics of a properly graded bone graft defined and published by N.T. Brewster et al*. The authors discovered that the particle-size distribution profile of a well-graded bone graft, one having optimal mechanical properties for impaction bone grafting, is similar to the Fuller or modified Fuller curve*. We liked Brewster’s evidence-based description of a well-graded bone graft.


​Significant innovations were required to design a bone mill with a small foot print capable of meeting Brewster’s requirement. Further, to eliminate bone graft quality variations due to operator interference, automation became the ideal choice.


After more than 4 years of innovating-designing-producing-testing, we exhibited our first automated and battery powered bone mill in the NASS 2014, San Francisco.

​Our HR500 Spinal Bone Mill has successfully provided superior bone grafts for patients since 2015, in the USA and overseas.


The design and technology of The Universal Bone Mill, introduced in 2018, is patterned according to our time-tested HR500 Spinal Bone Mill. It has a larger milling chamber, larger blades for creating 8 mm bone croutons for joint revision-impaction bone grafting, and a more powerful drive system. ​

Cenna Medical Technologies, Corp


Cenna Medical Technologies, (Cenna Medical), is a privately held company, registered in the state of Utah and based in Sandy, Utah, co-located with our manufacturing facility.

We control quality by manufacturing most parts and components at our facility. The exceptions are our battery units,

power-supply module and motor. We are continually creating new innovative blade designs that improve our overall product performance, based on input from surgeons. 

Houshang Rasekhi, D.Eng., the Founder and President of Cenna Medical, received his education at Rensselaer Polytechnic Institute. He is directly involved in product development, operations and management of Cenna Medical.

Dr. Rasekhi currently holds three patents on the bone mill, with an additional patent pending. 

Cenna Medical Technologies is fully dedicated to serve the medical community with technological innovations and excellence in quality.

*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.