Training

Question 1

McCormack Study

Tell about the study design with DTRAX?

Answer 1

60 patients
Multicenter single arm study
Single level cervical radiculopathy (C3-C7)
Assesments of: Cervical lordosis, foraminal dimensions, device retention, and fusion criteria
1 year results

Question 2

What is important for the surgeon to know about the outcome of the study?

Answer 2

1 year results in 60 patients
Fusions rates of 93%
Zero vertebral artery, nerve root or spinal cord injuries
Insignificant loss in lordosis
- 1.6 degrees at target level
- .04 degrees overall
NDI and VAS scores were significantly improved with baseline at 2 weeks and all assessments up to 1 year

Question 3

The Chisel has a flat leading edge of:

Answer 3

1mm in height

Question 4

TDR vs. ACDF in two Levels - 2 year study

What are the key article points regarding two level ACDF’s?

What are the key selling points?

Answer 4

• Radiographic success for ACDF is 79.8% vs 20.2% failure rate.
• There is n 11.4% reoperation rate at 2 years w 2-level ACDF
• 8% surgical re-intervention rate w/ ACDF due to pseudo at 24 months.

Rate of non-union and revision higher at 2 levels than is commonly believed.

Opportunity to decrease pseudo-rate using DTRAX

Question 5

Talk about the Carreaon Study that compared the treatment of ACDF pseudo’s: posterior revision vs. anterior revision.

Answer 5

120 patients
27 people - had repeat anterior procedures
93 people - had posterior procedures

The results showed that although posterior procedures required a longer hospital stay, significantly more blood loss, and higher complication rate ….

44% of patients with an anterior surgery had a 3rd operation

vs.

3% of patients with a posterior surgery had a 3rd operation.