Initial experience with a newly developed cementless hip endoprosthesis

Area of Science:

• Veterinary Orthopedics
• Canine Hip Replacement
• Biomaterials and Implants

Background:

• Severe hip osteoarthritis and chronic hip luxation significantly impact canine mobility and quality of life.
• Current treatment options may involve pain management, conservative therapies, or surgical interventions with varying success rates.

Purpose of the Study:

• To evaluate the early clinical outcomes of the novel HELICA-Endoprosthesis in dogs with hip joint conditions.
• To assess the safety and efficacy of this cementless hip prosthesis in a canine population.

Main Methods:

• Implantation of the HELICA-Endoprosthesis (cementless, screw-in femoral stem and acetabular component) in 39 dogs with severe hip osteoarthritis and 1 dog with chronic hip luxation.
• Patients ranged from 9 months to 10 years old and weighed 22-54 kg.
• Postoperative monitoring included assessment of weight-bearing, complications, and radiographic findings.

Main Results:

• All dogs were capable of weight-bearing on the operated leg one day post-surgery.
• Complications included loosening of stem and/or cup components in five dogs, primarily attributed to technical errors during the learning phase.
• Surgical revisions were successful in three of five cases; two required femoral head and neck excision.
• Radiographic bone resorption was noted in two dogs without significant clinical lameness.
• One dog experienced temporary ischial neuropraxy, with complete recovery within six weeks.

Conclusions:

• The HELICA-Endoprosthesis offers a potentially simpler surgical technique with shorter surgery times for canine hip replacement.
• Early clinical results are encouraging, with rapid return to weight-bearing observed.
• Further long-term follow-up, gait analysis, and histological evaluation are necessary for definitive assessment.