Trial results evaluating the clinical and radiographic performance of the G7 Acetabular System were posted on 2025-12-19. This observational study included participants with conditions such as Rheumatoid Arthritis and Noninflammatory Degenerative Joint Disease. The highest mean Harris Hip Score observed across different articulation types was 96.1.
Background
Rheumatoid Arthritis (RA) is a chronic inflammatory disorder that primarily affects the joints, leading to pain, swelling, stiffness, and potential joint damage over time. When severe joint damage occurs, particularly in the hip, surgical interventions like total hip arthroplasty (THA) become necessary to alleviate pain and restore function. The G7 Acetabular System is a component used in such procedures. Evaluating the real-world clinical and radiographic performance of such systems is essential for understanding their effectiveness in improving patient outcomes for conditions like RA and noninflammatory degenerative joint disease.
Trial design
This completed study was a prospective observational multi-center non-controlled study. It enrolled 162 participants to evaluate the clinical and radiographic performance of the G7 Acetabular Cup System. The conditions studied included Noninflammatory Degenerative Joint Disease and Rheumatoid Arthritis.
Key results
The study measured the Harris Hip Score across three different articulation types of the G7 Acetabular System. While specific time points for these measurements are not provided, the scores show a clear progression from lower initial values to higher subsequent values, indicating improved hip function:
- Harris Hip Score (Initial Measurements):
- For the Metal on Polyethylene articulation, the mean score was 45.8 (Standard Deviation 16.7) units.
- For the Ceramic on Polyethylene articulation, the mean score was 43.1 (Standard Deviation 12.6) units.
- For the Ceramic on Ceramic articulation, the mean score was 50.7 (Standard Deviation 15.4) units.
- Harris Hip Score (Subsequent Measurement Set 1):
- For the Metal on Polyethylene articulation, the mean score was 95.4 (Standard Deviation 7.4) units.
- For the Ceramic on Polyethylene articulation, the mean score was 94.2 (Standard Deviation 7.3) units.
- For the Ceramic on Ceramic articulation, the mean score was 92.8 (Standard Deviation 10.0) units.
- Harris Hip Score (Subsequent Measurement Set 2):
- For the Metal on Polyethylene articulation, the mean score was 96.1 (Standard Deviation 6.4) units.
- For the Ceramic on Polyethylene articulation, the mean score was 93.4 (Standard Deviation 9.5) units.
- For the Ceramic on Ceramic articulation, the mean score was 94.3 (Standard Deviation 8.7) units.
- Harris Hip Score (Subsequent Measurement Set 3):
- For the Metal on Polyethylene articulation, the mean score was 94.8 (Standard Deviation 7.1) units.
- For the Ceramic on Polyethylene articulation, the mean score was 91.7 (Standard Deviation 6.8) units.
- For the Ceramic on Ceramic articulation, the mean score was 94.1 (Standard Deviation 7.8) units.
What this means
The observed increase in Harris Hip Scores from initial lower values to consistently high values (in the 90s) across all articulation types suggests an improvement in hip function and pain relief for patients who received the G7 Acetabular System. The Harris Hip Score is a widely used outcome measure for hip function, where higher scores indicate better function and less pain. The consistency of these higher scores across different material combinations (metal on polyethylene, ceramic on polyethylene, and ceramic on ceramic) indicates that the system generally performed well in improving patient outcomes in this observational study.
Source
The information for this update was obtained from ClinicalTrials.gov, a public database of clinical studies. The results for the study evaluating the G7 Acetabular System were posted on 2025-12-19 on clinicaltrials.gov.