Tibial tuberosity to trochlear groove distance (TT-TG distance)

Last revised by Henry Knipe on 20 Oct 2023

Citation, DOI, disclosures and article data

Citation:

Brown N, Knipe H, Hacking C, et al. Tibial tuberosity to trochlear groove distance (TT-TG distance). Reference article, Radiopaedia.org (Accessed on 24 Apr 2024) https://doi.org/10.53347/rID-44662

DOI:

https://doi.org/10.53347/rID-44662

Permalink:

https://radiopaedia.org/articles/44662

rID:

44662

Article created:

3 May 2016, Nathan Brown

Disclosures:

At the time the article was created Nathan Brown had no recorded disclosures.

View Nathan Brown's current disclosures

Last revised:

20 Oct 2023, Henry Knipe ◉ ◈

Disclosures:

At the time the article was last revised Henry Knipe had the following disclosures:

Integral Diagnostics, Shareholder (ongoing)
Micro-X Ltd, Shareholder (ongoing)

These were assessed during peer review and were determined to not be relevant to the changes that were made.

View Henry Knipe's current disclosures

Revisions:

24 times, by 15 contributors - see full revision history and disclosures

Systems:

Musculoskeletal

Tags:

patella instability, patellar dislocation, patella subluxation, cases

Synonyms:

TT-TG
Tibial tuberosity-trochlear groove (TT-TG) distance
TTT distance

The tibial tuberosity to trochlear groove (TT-TG) distance is used to guide the treatment of patellofemoral instability. It can be accurately measured on both CT and MRI although MRI measurements are consistently shorter ⁶.