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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.
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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Congenital hip pathologies | Conical tapered stem for osteoarthritis due to congenital hip pathologies |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Conical tapered stem | Device | Implantation of conical tapered stem |
|
| Measure | Description | Time Frame |
|---|---|---|
| Harris Hip Score | Mean clinical results at last follow-up evaluated using the Harris hip score. Minimum-maximum values: 0-100. Best result: 100. | 15 months |
| Survival Rate | Percentage of survived implants (no component exchange or removed) described using Kaplan-Meier curve with 95% confidence interval. Minimum-maximum values: 0-100. Best result: 100. | 15 months |
| Radiographic Cup Osseointegration | Osseointegrated cups described using the Moore's criteria: the cup is osseointegrated when at least 3 criteria are present (radial trabeculae, superolateral buttress, inferolateral buttress, medial stress shielding, absence of radiolucent lines). | 15 months |
| Radiographic Stem Osseointegration | Osseointegrated stems described according to Engh's criteria | 15 months |
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Inclusion Criteria:
Exclusion Criteria:
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retrospective, consecutive adult population treated with conical tapered stems in cementless total hip arthroplasty for osteoarthritis due to congenital hip pathologies.
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| Name | Affiliation | Role |
|---|---|---|
| Francesco Traina, Prof | IRCCS Istituto Ortopedico Rizzoli, Bologna, ITaly | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Chirurgia Protesica e dei Reimpianti di Anca e Ginocchio, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy | Bologna | 40136 | Italy |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28291651 | Result | 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. | |
| 22819165 | Result | 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. |
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| ID | Title | Description |
|---|---|---|
| FG000 | Congenital Hip Pathologies | Conical tapered stem for osteoarthritis due to congenital hip pathologies Conical tapered stem: Implantation of conical tapered stem |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
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| ID | Title | Description |
|---|---|---|
| BG000 | Congenital Hip Pathologies | Conical tapered stem for osteoarthritis due to congenital hip pathologies Conical tapered stem: Implantation of conical tapered stem |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Harris Hip Score | Mean clinical results at last follow-up evaluated using the Harris hip score. Minimum-maximum values: 0-100. Best result: 100. | Total hip arthroplasties with a Wagner Cone implant in dysplasia | Posted | Mean | Standard Deviation | points | 15 months | hip | hip |
|
|
15 months
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Congenital Hip Pathologies | Conical tapered stem for osteoarthritis due to congenital hip pathologies Conical tapered stem: Implantation of conical tapered stem |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Dr Francesco Castagnini | IRCCS Istituto Ortopedico Rizzoli | +390516366418 | francescocastagnini@hotmail.it |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot_SAP | Yes | Yes | No | Study Protocol and Statistical Analysis Plan | Mar 18, 2022 | Mar 18, 2022 | Prot_SAP_000.pdf |
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| ID | Term |
|---|---|
| D006617 | Hip Dislocation |
| D011475 | Prosthesis Failure |
| ID | Term |
|---|---|
| D004204 | Joint Dislocations |
| D007592 | Joint Diseases |
| D009140 | Musculoskeletal Diseases |
| D014947 | Wounds and Injuries |
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| 17906591 | Result | 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. |
| 18725674 | Result | 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. |
| 28110848 | Result | 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. |
| hip |
|
| years |
| Participants |
|
| Sex: Female, Male | Count of Participants | Participants | Participants |
|
| Race (NIH/OMB) | Count of Participants | Participants | Participants |
|
| Region of Enrollment | Number | participants | Participants |
|
| Crowe I | Hips classified according to the Crowe dislocation degree (scale from 1, minimal subluxation, to 4, high riding hip) | Count of Units | hip | hip |
|
| Crowe II | Hips classified according to the Crowe dislocation degree (scale from 1, minimal subluxation, to 4, high riding hip) | Count of Units | hip | hip |
|
| Crowe III | Hips classified according to the Crowe dislocation degree (scale from 1, minimal subluxation, to 4, high riding hip) | Count of Units | hip | hip |
|
| Crowe IV | Hips classified according to the Crowe dislocation degree (scale from 1, minimal subluxation, to 4, high riding hip) | Count of Units | hip | hip |
|
| hip |
|
|
| Primary | Survival Rate | Percentage of survived implants (no component exchange or removed) described using Kaplan-Meier curve with 95% confidence interval. Minimum-maximum values: 0-100. Best result: 100. | Total hip arthroplasties with a Wagner Cone implant in dysplasia | Posted | Mean | 95% Confidence Interval | percentage of surviving hips | 15 months | hip | hip |
|
|
|
| Primary | Radiographic Cup Osseointegration | Osseointegrated cups described using the Moore's criteria: the cup is osseointegrated when at least 3 criteria are present (radial trabeculae, superolateral buttress, inferolateral buttress, medial stress shielding, absence of radiolucent lines). | Total hip arthroplasties with a Wagner Cone implant in dysplasia | Posted | Count of Units | hip | 15 months | hip | hip |
|
|
|
| Primary | Radiographic Stem Osseointegration | Osseointegrated stems described according to Engh's criteria | Total hip arthroplasties with a Wagner Cone implant in dysplasia | Posted | Count of Units | hip | 15 months | hip | hip |
|
|
|
| 4 |
| 85 |
| 0 |
| 85 |
| 0 |
| 85 |
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| D025981 |
| Hip Injuries |
| D011183 | Postoperative Complications |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |