ClinicalTrials.gg
RecruitingNCT04388332Updated Aug 31, 2026

ACDF Using Structural Allograft vs. Tritanium C

An interventional study of Structural allograft and Tritanium C in Degenerative Disc Disease, sponsored by Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute). Recruiting at 1 site in United States. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2026-08-31.

Sponsored by Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute) · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Started Aug 2020; still recruiting 6 years 2 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
60
Allocation
Non-randomized
Ages
18 Years to 80 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 232 studies in Intervertebral Disc Degeneration with a site in United States — 41 open to participants now, 60 under way, 5 of them phase 3. Intervertebral Disc Degeneration · United States.

Planned enrollment
64th of 141
60 · median 57
Started
2020
with 16 others
No phase
90 of 232
15 open now
Primary completion
2026-12
later than 25 of 59 live
Registered
156th of 232
by date

Among the 232 studies in Intervertebral Disc Degeneration with a site in United States, this one is the 64th largest by planned enrollment of the 141 interventional ones that give a count, is one of 17 that started in 2020, is one of 90 with no phase, reaches primary completion later than 25 of the 59 other live ones, and was the 156th registered.

Intervertebral Disc Degeneration

462 studies on the registry are indexed under Intervertebral Disc Degeneration; 100 are open to participants now.

Browse Intervertebral Disc Degeneration studies →

Open to participants now

41 of the 232 studies in Intervertebral Disc Degeneration with a site in United States are open now. Recruiting first, the newest first:

35 more — sign in →

All 41 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 60 Intervertebral Disc Degeneration studies recruiting now, 29 (48%) set no upper age limit and 16 (27%) stop at 75 or younger; 7 take children under 18; 5 take healthy volunteers.

This study: 18 Years to 80 Years · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 232 studies in Intervertebral Disc Degeneration with a site in United States, or all of them as a file.
02

Study summary

This is an observational, descriptive, prospective and retrospective data collection study. The purpose of this study is to observe radiographic outcomes of patients who will undergo anterior cervical discectomy and fusion (ACDF) utilizing Tritanium C (Stryker Spine). The rate of fusion success and adverse events will be compared retrospectively to patients who underwent instrumented ACDF utilizing structural allograft bone with plates.

Read the detailed description

Retrospective Cohort: A maximum of 200 patients that received one or two level ACDF structural allograft with plates with autograft and/or allograft comprised of cancellous and/or corticocancellous bone chips at AHN in the past will retrospectively be screened for inclusion into a pool of potential candidates for the retrospective cohort. Patients will be included in this preliminary pool if the following information are available: age (at surgery), sex, body mass index (at surgery), no smoking at baseline, number of levels operated on, which specific levels were operated on, standard of care clinic follow-up at 6 and 12 months (3 month visit not required) and imaging that can be used to assess fusion at baseline, 6 and 12 months (3 month imaging not required). If available, NDI and VAS, questionnaires completed during baseline and post-op visits will be collected.

This pool of retrospective cohort candidates will be used to match the patients in the prospective cohort to patients treated with structural allograft using a 1:2 ratio. Thus, 40 patients will ultimately be included in the retrospective cohort.

03

Conditions studied

  • Degenerative Disc Disease

Keywords

  • Tritanium C
  • Structural Bone Graft
  • Anterior Cervical Discectomy and Fusion
04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Males or females ≥18 years of age, ≤ 80 years of age
  2. Subject is skeletally mature
  3. Subject is diagnosed with degenerative disc disease (DDD) at one level or two contiguous levels from the C2 -T1 disc
  4. Subject has received six weeks of non-operative therapy i.e. injections, physical therapy, oral
  5. Subject understands the conditions of enrollment and is willing to sign and date the (Prospective study)
  6. Subjects that will prospectively undergo one or two level anterior cervical discectomy and fusion with Tritanium C (Prospective study)
  7. Subjects that underwent one or two level anterior cervical discectomy and fusion with either standard of care structural allograft bone at any AHN facility from 01/01/2016 to 08/14/2023 (Retrospective study) • Note that these patients will be followed for a maximum of one year (up to 08/14/2024 for a patient enrolled at the end of this inclusion period)

Exclusion criteria

Exclusion Criteria:

Patients may not be enrolled in the study if any of the following exclusion criteria are present:

  1. Presence of an infection systemic or local
  2. Presence of marked local inflammation
  3. Subject has any abnormality present which affects the normal process of bone remodeling including, but not limited to, severe osteoporosis involving the spine, bone absorption, osteopenia, primary or tumors involving the spine, active infection at the site or certain metabolic disorders affecting osteogenesis
  4. Use of bone growth stimulator
  5. Subject has prior fusion at the levels to be treated
  6. Subject has any neuromuscular deficit
  7. Subject has any condition of senility, mental illness, or substance abuse
  8. Subject has any other medical or surgical condition which would preclude the potential benefit of spinal implant surgery in the judgement of the PI
  9. Subject has rapid joint disease, bone absorption, osteopenia, osteomalacia, and/or osteoporosis. Subject is pregnant or plans to become pregnant during the course of the study.
  10. ≥40 kg/m2
  11. Subject uses chronic
  12. Subjects with current active psychiatric diagnosis or a personality disorder likely to interfere with the study
  13. Subjects who smoke and do not plan to quit
  14. Mental or neuromuscular disorder which would create an unacceptable risk of fixation failure or complications in postoperative care
  15. Subject has any open wounds
  16. Subject has inadequate tissue coverage over the operative site
  17. Subject may be sensitive to titanium materials
  18. Subject is missing 6 and/or 12 month clinical or radiographic follow-up (Retrospective study)
Terms in these criteria, in plain language(4)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
60 participants (estimated)

Study arms

  • Active comparator
    Retrospective

    40 patients that received one or two level ACDF structural allograft with plates with autograft and /or allograft comprised of cancellous and/or corticocancellous bone chips.

    Procedure: Structural allograft

  • Experimental
    Prospective

    20 patients who are receiving Tritanium C as standard of care.

    Device: Tritanium C

Interventions

  • ProcedureStructural allograft

    Subjects that have received ACDF structural allograft with plates with autograft and/or allograft comprised of cancellous and/or corticocancellous bone chips

  • DeviceTritanium C

    Subjects will receive the Tritanium C anterior cervical cage which is intended to be used with autogenous or allogenic bone graft comprised of cancellous and/or corticocancellous bone graft

06

What researchers measure

Primary outcomes

  1. Time to the presence of fusion

    Antero-posterior and lateral plain radiographs

    Time frame: 3 months post-operatively

  2. Time to the presence of fusion

    Antero-posterior and lateral plain radiographs

    Time frame: 6 months post-operatively

  3. Time to the presence of fusion

    Antero-posterior and lateral plain radiographs

    Time frame: 12 months post-operatively

Secondary outcomes

  1. Neck disability

    Neck Disability Index (NDI): Subjects will designate a statement that best describes their level of disability for each section of the survey. Statements are then ranked from 0-5, where 0 is a better outcome and 5 is a worse outcome. All rankings are totaled for a final score.

    Time frame: Baseline, 3, 6, and 12 months post-operatively

  2. Neck and arm pain

    Visual Analog Scale (VAS) for neck and arm pain: Subjects will designate a score to represent their pain from 0 to 10. 0 is indicative of no pain and 10 is indicative of the worst possible pain.

    Time frame: Baseline, 3, 6, and 12 months post-operatively

  3. Incidence of sensory deficits

    Yes or no response to: Sensory deficit at the surgical level, sensory deficit at an adjacent level to the surgical level, sensory deficit at a different level to the surgical level, any sensory deficit during follow-up

    Time frame: Baseline, 3, 6, and 12 months post-operatively

  4. Incidence of motor deficits

    Yes or no response to: Motor deficit at the surgical level, motor deficit at an adjacent level to the surgical level, motor deficit at a different level to the surgical level, any motor deficit

    Time frame: Baseline, 3, 6, and 12 months post-operatively

  5. Rate of Adverse Events

    Adverse Event assessment

    Time frame: Day of surgery, 3, 6 and 12 month post-operatively

07

Study locations

1 of 1 sites recruiting
  • Allegheny Health Network
    Pittsburgh, Pennsylvania 15212, United States
    Recruiting
    • Sarah Kimutis · Contactsarah.kimutis@ahn.org
    • AHN Clinical Trial Contact Clinical Trial Contact · Contactclinicaltrials@ahn.org
    • Nestor Tomycz, MD · Principal investigator
    • Alexander Yu, MD · Sub investigator
    • Gary Schmidt, MD · Sub investigator
    • Daniel Altman, MD · Sub investigator
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Aug 2020 (actual). Primary completion is estimated for Dec 2026, 76 months after the start.

Of 40 non-industry interventional studies with no phase under Intervertebral Disc Degeneration, half reached primary completion within 44 months of starting (the median), counting those still running; a quarter within 13 and three quarters within 63. This study's planned 76 months is above that.

Counting every sponsor, half of 85 studies reached it within 50 months; a quarter within 27 and three quarters within 72.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 2, 2020
First posted
May 14, 2020
StartActual
Aug 20, 2020
Primary completionEst.
Dec 2026
CompletionEst.
Dec 2026
Last update
Aug 31, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 31, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04388332
Lead sponsor
Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute)
Collaborators
VB Spine, LLC
Responsible party
Nestor Tomycz (Assistant Professor, Department of Neurosurgery, Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute)) — Principal investigator
First posted
May 14, 2020
Start date
Aug 20, 2020
Primary completion
Dec 2026 (estimated)
Completion
Dec 2026 (estimated)
Last update
Aug 31, 2026

Study contacts

Nestor Tomycz, MD
Contact
nestor.tomycz@ahn.org
412-359-6200
Alexander Yu, MD
Contact
alexander.yu@ahn.org
412-359-6200
Nestor Tomycz, MD
principal investigator · Allegheny Health Network

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

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