Clinical trial NCT04748458: Long-term Outcomes of Conical Tapered Stems in Cementless Total Hip Arthroplasty Due to Congenital Hip Pathologies
Official title: Retrospective Study About the Long-term Outcomes of Conical Tapered Stems in Cementless Total Hip Arthroplasty for Osteoarthritis Due to Congenital Hip Pathologies
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Dysplasia; Hip
Prosthesis Survival
Lead sponsor: Istituto Ortopedico Rizzoli
Sponsor class: OTHER
First posted: 2021-02-10
Enrollment: 85
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: RETROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: retrospective, consecutive adult population treated with conical tapered stems in cementless total hip arthroplasty for osteoarthritis due to congenital hip pathologies.

Brief summary: A retrospective consecutive population of patients treated with conical tapered stems in cementless total hip arthroplasty for osteoarthritis due to congenital hip pathologies will be selected. The aim of this retrospective study is to evaluate the long-term clinical and radiographic results of this implant and the survival rates in such a specific cohort.

Detailed description: Congenital hip pathologies may severely alter the local anatomy of the hip, making total hip arthroplasty (THA) due to osteoarthritis after congenital hip pathologies challenging. While it seems that congenital hip pathologies did not significantly influence the outcomes when compared to THA after osteoarthritis, the choice of implant was demonstrated to impact the survival rates of the THA after congenital hip pathologies.

To date, no guidelines exist about the correct choice of hip implant in congenital hip pathologies: only mid-term case series are available. Conical tapered stems have been frequently suggested for the most difficult cases.

The aim of this study is to describe the survival rates and the long-term clinical and radiological outcome of conical tapered stems in THAs after congenital hip pathologies.

Eligibility criteria: Inclusion Criteria:

* Symptomatic hip osteoarthritis due to congenital hip pathologies
* Consecutive population with a minimum follow-up of 2 years
* Cementless total hip arthroplasty with conical tapered stem
* Pre-operative planning using CT
* Complete clinical and radiographic assessment

Exclusion Criteria:

* Other type of hip osteoarthritis
* Other type of implants
* Inadequate pre-operative planning (eg: no CT)
* Incomplete clinical and radiographic assessment

Primary outcomes:
measure: Harris Hip Score
timeFrame: 15 months
measure: Survival Rate
timeFrame: 15 months
measure: Radiographic Cup Osseointegration
timeFrame: 15 months
measure: Radiographic Stem Osseointegration
timeFrame: 15 months
Secondary outcomes:
Other outcomes:
Locations:
city: Bologna
country: Italy
facility: Chirurgia Protesica e dei Reimpianti di Anca e Ginocchio, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
Study officials:
affiliation: IRCCS Istituto Ortopedico Rizzoli, Bologna, ITaly
name: Francesco Traina, Prof
role: STUDY_DIRECTOR
References:
citation: Greber EM, Pelt CE, Gililland JM, Anderson MB, Erickson JA, Peters CL. Challenges in Total Hip Arthroplasty in the Setting of Developmental Dysplasia of the Hip. J Arthroplasty. 2017 Sep;32(9S):S38-S44. doi: 10.1016/j.arth.2017.02.024. Epub 2017 Feb 22.
citation: Perry KI, Berry DJ. Femoral considerations for total hip replacement in hip dysplasia. Orthop Clin North Am. 2012 Jul;43(3):377-86. doi: 10.1016/j.ocl.2012.05.010.
citation: Argenson JN, Flecher X, Parratte S, Aubaniac JM. Anatomy of the dysplastic hip and consequences for total hip arthroplasty. Clin Orthop Relat Res. 2007 Dec;465:40-5. doi: 10.1097/BLO.0b013e3181576052.
citation: Pak P, de Steiger R. Cone femoral prosthesis for osteoarthritis of the hip with femoral dysplasia. J Orthop Surg (Hong Kong). 2008 Aug;16(2):206-10. doi: 10.1177/230949900801600216.
citation: Taniguchi N, Jinno T, Koga D, Hagino T, Okawa A, Haro H. Cementless Hip Stem Anteversion in the Dysplastic Hip: A Comparison of Tapered Wedge vs Metaphyseal Filling. J Arthroplasty. 2017 May;32(5):1547-1552. doi: 10.1016/j.arth.2016.12.020. Epub 2016 Dec 22.