Cementless and Cemented Dual-Pivot Total Knee Arthroplasty: A Matched Comparison With a Minimum Two-Year Follow-Up.

Background: With the use of newer biomaterials, many authors have reported similar results between cementless and cemented total knee arthroplasty (TKA). The purpose of this study was to compare the early clinical and radiographic outcomes of cementless and cemented TKA using the same dual-pivot articulation.

Methods: A consecutive series of 806 TKAs were implanted by a single surgeon using the same dual-pivot articulation.

Custom Triflange Acetabular Implants: Average 10-Year Follow-Up.

Background: Acetabular reconstruction options in the setting of substantial bone deficiency (Paprosky 3A and 3B) remain limited. Custom triflange acetabular implants are one choice for this challenging problem. However, few studies have reported on survivorship beyond 3 to 5 years.

Does design change in total knee arthroplasty implants affect patient-reported outcomes?

Purpose: The purpose of this study is to compare the early results of patient-reported outcomes between two generations of a total knee system.

Methods: Between June 2018 and April 2020, 121 first-generation, cemented TKAs (89 patients) and 123 s-generation, cemented TKAs (98 patients) were performed by a single surgeon. Demographic and surgical data were collected from all patients.

Instability After Primary Total Hip Arthroplasty: Dual Mobility Versus Jumbo Femoral Heads.

Background: The use of dual mobility (DM) articulations has grown substantially over the last decade to help minimize dislocation risk. The purpose of this study is to compare the results of DM articulations to jumbo femoral heads of equivalent sizes as they relate to postoperative dislocation.

Methods: This is a retrospective cohort study of primary total hip arthroplasties (THAs) performed at a single institution between 2005 and 2018.

Press-Fit Dual-Pivot Total Knee Arthroplasty: Early Results With a Minimum 2-Year Follow-Up.

Background: Ultracongruent (UC) tibial bearings are being used with increasing frequency in the United States. Evidence suggests that the use of certain UC bearings may lead to improved patient satisfaction when compared with using conventional inserts. However, little is known as to what effect the use of UC tibial inserts has on bone ingrowth in uncemented total knee arthroplasty (TKA).

Progressive Tibial Bearing Sagittal Plane Conformity in Cruciate-Retaining Total Knee Arthroplasty.

Background: We hypothesized that when the posterior cruciate ligament (PCL) is found deficient at total knee arthroplasty (TKA), using an anterior-stabilized (AS) tibial insert would provide similar function and survivorship when compared to using a more traditional cruciate-retaining (CR) bearing when the (PCL) is balanced.

Methods: A total of 1731 TKAs were performed using the same TKA design. Of them, 868 TKAs had a standard CR insert implanted (CR-S), 480 TKAs used a lipped CR insert (CR-L), and 383 TKAs used an AS insert.

Medial Mobile-Bearing Unicompartmental Knee Arthroplasty in Young Patients Aged Less Than or Equal to 50 Years.

Background: Contemporary research has shown medial mobile-bearing unicompartmental knee arthroplasty to be an effective treatment in patients younger than 60 years; however, only one other study has specifically investigated unicompartmental arthroplasty outcomes in patients 50 years or younger. The purpose of this study was to determine the clinical outcomes and survivorship of medial mobile-bearing unicompartmental arthroplasty in this younger patient population.

Methods: A retrospective review of patients undergoing primary unicompartmental knee arthroplasty using the Oxford partial knee from 2003 to 2014 in a single practice database was performed.

The patient-specific Triflange acetabular implant for revision total hip arthroplasty in patients with severe acetabular defects: planning, implantation, and results.

Aims: Few reconstructive techniques are available for patients requiring complex acetabular revisions such as those involving Paprosky type 2C, 3A and 3B deficiencies and pelvic discontinuity. Our aim was to describe the development of the patient specific Triflange acetabular component for use in these patients, the surgical technique and mid-term results. We include a description of the pre-operative CT scanning, the construction of a model, operative planning, and surgical technique.

Bilateral Total Hip and Knee Arthroplasties: Average 10-Year Follow-Up.

Background: The present study investigates the clinical and radiographic outcomes in patients with all 4 major lower extremity joints replaced.

Methods: A retrospective review of our institution's database identified 125 patients in whom both hips and both knees were replaced. The mean time between the first and last arthroplasty was 6.

ACL Damage and Deficiency is Associated with More Severe Preoperative Deformity, Lower Range of Motion at the Time of TKA.

Background: ACL status varies in the arthritic knee during TKA.

Questions/purposes: The purpose of this study was to examine clinical features and intraoperative findings associated with stages of ACL degeneration.

Methods: Coronal deformity, ROM, intra-articular degenerative patterns, and ligament releases were assessed for 1656 knees during TKA.

Twenty-Five-Years and Greater, Results After Nonmodular Cemented Total Knee Arthroplasty.

Background: Total knee arthroplasty (TKA) has been shown to be very successful with long-term follow-ups. But there are no reports showing prosthesis survival at 25-30 years. Here, we report the outcomes for 25-30 years using the Anatomic Graduated Component (Biomet, Warsaw, IN) TKA and elucidate the etiology and cause of failure of the components.

Residual Symptoms and Function After Unicompartmental and Total Knee Arthroplasty: Comparable to Normative Controls?

Background: Whether patient-reported symptoms and function after total knee arthroplasty (TKA) and medial unicompartmental knee arthroplasty (UKA) compare favorably to similar individuals without a diagnosis of knee pathology has not been investigated.

Methods: A retrospective, multicenter study was designed in which 4 centers contributed patients between ages 18 and 80 years undergoing knee arthroplasty. Data were collected by an independent, third-party survey center that administered a questionnaire assessing patient satisfaction and function.

Residual Symptoms and Function in Young, Active Hip Arthroplasty Patients: Comparable to Normative Controls?

Background: Whether patient-reported symptoms and function after total hip and surface replacement arthroplasty in young, active patients compare favorably to those without known hip pathology has not been investigated.

Methods: A retrospective, multicenter study was designed in which 5 centers contributed patients aged <60 years with a presymptomatic University of California at Los Angeles score ≥6 undergoing hip arthroplasty. Data were collected by an independent, third-party survey center that administered a questionnaire assessing patient satisfaction and function.

Cemented and uncemented total hip arthroplasty using the same femoral component.

Purpose: The purpose of this study was to evaluate the same femoral component after cemented and uncemented total hip arthroplasty. The results were compared in terms of hip scores, subsidence, and survivorship.

Methods: Between 1986 and 1996, 1017 primary THAs were implanted in 882 patients using the same porous-coated, titanium-alloy, femoral component.

Cultural Nuance in Orthopedic Foreign Aid: Differences in Patient Concerns.

Orthopedic aid to developing nations is expanding and becoming a unique facet of the specialty. This investigation seeks to compare patient impressions and concerns regarding the care patients receive as part of an itinerant surgical aid trip in 2 nations. In 2013 and 2014, patients from 2 separate nations completed a Likert scale survey assessing impressions of the care they received at the hands of a surgical team from abroad.

Ten-Year Outcome Comparison of the Anatomical Graduated Component and Vanguard Total Knee Arthroplasty Systems.

Unlabelled: The development of a new total knee system as a successor prosthesis in total knee arthroplasty (TKA) requires clinical outcome improvement. 10,843 TKAs were performed of which 9169 utilized the Anatomical Graduated Component (AGC) and 1674 utilized the Vanguard prosthesis (both Biomet, Warsaw, IN). Survival rates at ten years postoperatively for the AGC and Vanguard were 98.

Use of screws and cement in revision TKA with primary or revision specific prosthesis with up to 17 years followup.

The purpose of this study was to investigate the use for screws and cement, and primary and revision specific prosthesis for revision TKA. Between July 1989 and February 2010, 839 consecutive revision TKAs were performed, with 609 knees meeting inclusion criteria. At 17 years followup, Kaplan-Meier survivorship was 0.

The Surgeon's Role in Relative Success of PCL-Retaining and PCL-Substituting Total Knee Arthroplasty.

Background: The orthopedic literature has not shown a universal and replicated difference, outside of flexion, in clinical results between posterior cruciate ligament retention and posterior cruciate ligament substitution in total knee arthroplasty.

Questions/purposes: This study was performed to compare the restoration of flexion and knee function in a large series of cruciate-retaining and cruciate-substituting total knee arthroplasties (TKRs). In addition, we aimed to study how other variables, such as those unique to each surgeon, may have affected the results.

Twenty-year followup of an uncemented stem in primary THA.

Background: Uncemented stems have been used in THA for well over two decades, but there are relatively few studies reporting on the results after 20 years.

Questions/purposes: The purpose of this study was to evaluate at a minimum followup of 20 years (1) hip scores; (2) radiographic findings, including stem fixation and osteolysis; (3) reoperations; and (4) survivorship free from aseptic loosening in a group of patients who underwent primary THA using a proximally porous-coated, plasma-sprayed, straight-stemmed, titanium-alloy femoral component.

Methods: Between 1987 and 1993, we performed 1517 primary THAs, of which 447 were cementless, and 157 used the implant under study here (representing 10% of the THAs during the period in question).