The external deflection angle of the patellar tendon and the TT-TG value are used to determine whether recurrent patellar dislocation should undergo tibial tuberosity osteotomy

The clinical application of patellar tendon deflection angle in recurrent patellar dislocation

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2100042711

Enrollment

Unknown

Registered

2021-01-26

Start date

2021-06-01

Completion date

Unknown

Last updated

2021-05-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Recurrent dislocation of the patella

Interventions

Gold Standard:The TT-TG value is currently the most commonly used clinical index to judge the external deviation of the tibial tubercle, and TT-TG >= 20mm is the gold standard for tibial tubercle oste

Index test:Patellar&#32

tendon&#32

outer&#32

deflection&#32

angle&#32

>=&#32

20.15&#32

degrees

Eligibility

Sex/Gender

All

Age

16 Years to 37 Years

Inclusion criteria

Inclusion criteria: 1. Patients with at least two patellar dislocations; 2. Patients with informed consent; 3. Patients with mature bones; 4. Patients with unilateral patellar dislocation.

Exclusion criteria

Exclusion criteria: 1. Patients with at least two patellar dislocations; 2. Patients with informed consent; 3. Patients with mature bones; 4. Patients with unilateral patellar dislocation.

Design outcomes

Primary

Measure	Time frame
Patellar tendon outer deflection angle;SEN, SPE, ACC, AUC of ROC;	—

Countries

China

Contacts

Public ContactDai Zhu

The First Affiliated Hospital of Nanhua University

oliverdai@hotmail.com+86 13975484039

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026