Comparison of Post-operative Knee Range of Motion and Functions Between Intraoperative Complete and Incomplete Patellofemoral Articular Contacts in Patients Undergoing Total Knee Arthroplasty

Comparison of Post-operative Knee Range of Motion and Functions Between Intraoperative Complete and Incomplete Patellofemoral Articular Contacts in Patients Undergoing Total Knee Arthroplasty: A Prospective, Randomized Controlled Trial

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05349461

Enrollment

Registered

2022-04-27

Start date

2021-04-20

Completion date

2022-12-31

Last updated

2022-04-27

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

Conditions

Complete Contact, Incomplete Contact

Brief summary

The purpose of this study is to compare clinical outcome in knee range of motion and functions between intraoperative complete and incomplete patellofemoral articular contacts

Interventions

PROCEDUREComplete patellofemoral articular contact

The patellofemoral condition is in constant contact with the femoral trochlea when the knee is bent from 30 to 90 degrees during the No thumb test.

PROCEDUREIncomplete patellofemoral articular contact

The patellofemoral condition is in no constant contact with the femoral trochlea when the knee is bent from 30 to 90 degrees during the No thumb test.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

TRIPLE (Subject, Caregiver, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Healthy volunteers

Inclusion criteria

* Primary osteoarthritis of knee who were scheduled for a primary total knee arthroplasty * Age 50-80 year

Exclusion criteria

* Revision surgery * Bilateral total knee arthroplasty * History of patellar fracture * History of patellar chondromalacia * History of Patellar instability

Design outcomes

Primary

Measure	Time frame	Description
Knee range of motion (ROM)	Change from baseline Knee range of motion (ROM) at 3 months, 6 months, and 12 months after surgery	Goniometer measure range of motion (minimum 0, maximum 145)
Knee flexion	Change from baseline knee flexion at 3 months, 6 months, and 12 months after surgery	Goniometer measure knee flexion (minimum 135, maximum 145)
Knee extension	Change from baseline knee extension at 3 months, 6 months, and 12 months after surgery	Goniometer measure knee extension (minimum -10, maximum 0)

Secondary

Measure	Time frame	Description
Knee Society and Knee Society function score	Change from baseline Knee Society and Knee Society function score at 3 months, 6 months, and 12 months after surgery	Knee Society and Knee Society function score (minimum 0, maximum 200)
Prevalence of anterior knee pain ,AKP	Change from baseline Prevalence of anterior knee pain ,AKP 3 months, 6 months, and 12 months after surgery	Prevalence of anterior knee pain ,AKP (minimum 0, maximum 10)
New patellar score	Change from baseline new patellar score at 3 months, 6 months, and 12 months after surgery	New patellar score (minimum 0, maximum 30)
Oxford knee score	Change from baseline Oxford knee score 3 months, 6 months, and 12 months after surgery	Oxford knee score (minimum 0, maximum 48)

Countries

Thailand

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026