
Medically Reviewed By
Dr. Deepak Garg ( Orthopaedic Oncology & Robotic Joint Surgery)
A masterclass in revision total hip arthroplasty on massive acetabular bone defects, Paprosky classification, 3D-printed trabecular titanium modular augments, and pelvic discontinuity stabilization.
CRITICAL CLINICAL RED FLAG: Progressive groin pain, limb shortening, and audible clicking in a patient with a prior total hip replacement indicate aseptic loosening and progressive acetabular osteolysis; unaddressed cavitary and segmental bone destruction can culminate in catastrophic Pelvic Discontinuity.
Ultra-high molecular weight polyethylene wear debris and micromotion in aging hip arthroplasties induce macrophage-mediated periprosthetic osteolysis. In revision surgery, deficient acetabular bone stock compromises implant initial mechanical stability and long-term biological osseointegration, demanding structured classification and modular reconstruction.
Paprosky Type I & II: Intact acetabular rim with minor cavitary or superior bone loss, amenable to hemispherical porous-coated press-fit cups with screw fixation.
Paprosky Type IIIA (Severe Superior Defect): >30% to 50% bone loss with superior migration of the hip center >3 cm above the obturator line (the "up-and-out" defect); ischial lysis present.
Paprosky Type IIIB (Severe Medial Defect): >50% circumferential bone loss with medial migration past Kohler's line (the "up-and-in" defect), severe tear-drop and ischial lysis with imminent or established pelvic discontinuity.
Modern 3D additive manufacturing has replaced structural allograft with porous trabecular titanium (porosity ~80%, mean pore size ~300-500 µm), replicating the modulus of elasticity of human cancellous bone and eliminating allograft resorption:
1. Anatomical Hip Center Restoration: Modular structural wedges and buttress augments fill uncontained segmental defects, bringing the true rotational hip center back to within 5 mm of its anatomical coordinates.
2. High Initial Frictional Coefficient (Scratch Fit): Provides immediate rotational and shear stability against host pelvic bone, permitting direct osteoblast migration and rapid bone ingrowth.
3. Cup-Cage & Custom Triflange Constructs: In true pelvic discontinuity, bridging the superior ilium and inferior ischium with custom 3D titanium triflange implants or cup-cage constructs stabilizes the dissociated hemipelvis rigidly.
"Revising a failed hip with massive bone loss is an engineering triumph. 3D-printed trabecular titanium augments anchor directly into host bone, restoring stable, pain-free walking even in the most severe Paprosky Type IIIB defects." — Dr. Deepak Garg
1. Paprosky WG, Perona PG, Lawrence JM. Acetabular defect classification and surgical reconstruction in revision arthroplasty. A 6-year follow-up evaluation. The Journal of Arthroplasty, 1994; 9(1): 33-44.
2. Sporer SM, Paprosky WG. The treatment of massive acetabular bone loss with a modular porous metal augment in revision total hip arthroplasty. The Journal of Bone and Joint Surgery (JBJS Am), 2006; 88(Suppl 3): 71-78.
3. Gallart X, Garcia-Rey E, Rios J, et al. Revision Total Hip Arthroplasty with 3D Trabecular Titanium Cups in Severe Acetabular Defects: Multicenter Prospective Study. The Bone & Joint Journal, 2021; 103-B(7): 1238-1246.

Senior Consultant & Clinical Director — Orthopaedic Oncology & Robotic Joint Surgery
MBBS (TNMC Mumbai), DNB Orthopaedics (PGI & SP Miraj), Fellowship Arthroplasty and Arthroscopy (Fortis Hospital, New Delhi), Fellowship Orthopaedic Oncology (Rajiv Gandhi Cancer Institute, New Delhi)

16+ Years Experience
Spica — Grover Hospital
Request a priority OPD appointment or second opinion on your scans.
Proprietary surgical methodologies and precision protocols pioneered by our senior directors to minimize trauma, protect natural anatomy, and accelerate recovery.

Dr. Deepak Garg (Orthopaedic Surgical Oncology - RGCI Delhi Trained) and Dr. Neha Gupta (Medical Oncology) co-lead the Bone Cancer & Sarcoma Center at Spica Healthcare. Integrating intensive multi-agent neoadjuvant chemotherapy protocols (MAP: High-Dose Methotrexate, Doxorubicin, Cisplatin for Osteosarcoma; VIDE: Vincristine, Ifosfamide, Doxorubicin, Etoposide for Ewing Sarcoma) with 3D computer-navigated limb salvage surgery and modular titanium megaprosthetic joint reconstruction, 5-year survival rates exceed 75% to 80% while saving over 95% of patients from limb amputation.
Spica Healthcare — Bone and Cancer Institute, Bathinda — is South-Western Punjab's premier super-speciality centre led by AIIMS and Tata Memorial fellowship-trained directors.
Every diagnostic MRI review, surgical staging, and operation is personally directed by chief clinical specialists — Dr. Deepak Garg (Orthopaedic Oncology & Robotics) and Dr. Neha Gupta (Medical Oncology) — guaranteeing zero junior proxies.
Sub-millimeter implant positioning and soft-tissue ligament balancing ensuring patients walk comfortably within 24 hours of total knee replacement.
South-West Punjab's only dedicated centre for modular titanium megaprosthesis, saving natural limbs and functions in 95%+ of bone cancer patients.
Full cashless coverage for Ayushman Bharat (PM-JAY), Punjab Govt Health Schemes, ECHS, and 30+ private insurance networks with on-desk approvals.
Positive-pressure HEPA filtered theatres minimizing infection rates below international benchmarks with 24/7 dedicated critical care backup.
Fellowship-trained surgical directors from AIIMS & Tata Memorial providing compassionate, world-class tertiary care in super-speciality orthopaedics and medical oncology.

Senior Consultant & Clinical Director — Medical Oncology
MBBS (BFUHS Faridkot), MD Radiation Oncology (BFUHS Faridkot), DrNB Medical Oncology (Sarvodaya Hospital, Faridabad), Precision Oncology (Harvard, USA), Ex Consultant RGCI New Delhi


Senior Consultant & Clinical Director — Orthopaedic Oncology & Robotic Joint Surgery
16+ Yrs ExpSenior Consultant & Clinical Director — Orthopaedic Oncology & Robotic Joint Surgery
MBBS (TNMC Mumbai), DNB Orthopaedics (PGI & SP Miraj), Fellowship Arthroplasty and Arthroscopy (Fortis Hospital, New Delhi), Fellowship Orthopaedic Oncology (Rajiv Gandhi Cancer Institute, New Delhi)
Free OPD screening camps, director-led masterclasses, and national oncology representations by Spica Healthcare.
Real stories from patients who recovered through limb preservation surgery, 3D robotic joint replacements, and precision cancer care at Spica Healthcare — Grover Hospital, Bathinda.
Evidence-based surgical recovery roadmaps, robotic joint protocols, and precision oncology insights written by our clinical directors.