Developmental Dysplasia of the Hip
Conditions
Interventions
Navigation Group:Computer-assisted navigation PAO
Freehand Group:Conventional freehand PAO
Sponsors
The Fourth Medical Center of PLA General Hospital
Eligibility
Sex/Gender
All
Age
18 Years to 45 Years
Inclusion criteria
Inclusion criteria: (1) Skeletally mature patients aged 18 to 45 years with closed physes; (2) Clinical diagnosis of symptomatic developmental dysplasia of the hip (DDH), characterized by inguinal pain persisting for more than 6 months despite conservative management; (3) Radiographic parameters consistent with DDH, defined as a lateral center-edge angle (LCEA) 10°; (4) Preoperative osteoarthritis classified as Tönnis grade 0 or 1; (5) Good concentric congruency between the femoral head and acetabulum confirmed on preoperative functional radiographs. (6)Voluntarily signed informed consent.
Exclusion criteria
Exclusion criteria: (1) Moderate to severe osteoarthritis (Tönnis grade = 2) or significant joint space narrowing (< 2 mm); (2) Crowe type III or IV high dislocation, or a severely deformed femoral head precluding concentric reduction; (3) History of prior open hip surgery (including osteotomy or open reduction) or septic arthritis in the affected joint; (4) Concomitant severe neuromuscular disorders (e.g., cerebral palsy, sequelae of poliomyelitis), connective tissue diseases (e.g., Marfan syndrome), or systemic conditions affecting bone healing (e.g., uncontrolled diabetes, active rheumatoid arthritis, severe osteoporosis); (5) Severe deformity requiring concurrent femoral osteotomy; (6) Contraindications to computer-assisted navigation, such as the presence of metallic implants at the surgical site; (7) Inability to comply with the postoperative rehabilitation protocol or concurrent participation in other clinical trials that might interfere with the study results. (8)Intolerance to general anesthesia or severe systemic diseases.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Achievement rate of radiographic correction parameters;Intraoperative radiation exposure;Operative time; | — |
Secondary
| Measure | Time frame |
|---|---|
| Complication rate;Hip Functional Scores and Pain Scores; | — |
Countries
China
Contacts
Public ContactYong Li
Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital
Outcome results
None listed