We used 3D Computer-assisted Design (CAD) templates provided by the manufacturers and representing four primary femoral hip systems (Figure 1 ) with different implantation strategies (Table I ): 1) uncemented calcar-guided stems with two offset options (Optimys, Mathys, Switzerland), 2) uncemented straight stems with two offset options (Summit, DePuy Synthes, USA), 3) cemented undersized stems (Exeter philosophy) with three offset options (CPT, ZimmerBiomet, USA), and 4) cemented line-to-line stems (canal-filling Kerboull philosophy) with proportional offset options (Centris, Mathys, Switzerland). For each implant, we used the neck lengths available for 36 mm ceramic heads.
Summit
Manufactured by DePuy
Sourced in United States
The Summit is a piece of laboratory equipment used for the analysis and processing of various samples. It performs fundamental functions necessary for scientific research and testing, without making claims about its intended use or application.
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Lab products found in correlation
4 protocols using summit
1
Comparative Analysis of Femoral Hip Implants
2
Ceramic vs. Metal Acetabular Liners in Total Hip Arthroplasty
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All patients received identical devices in each group except only for acetabular liner (metal or ceramic). Pinnacle acetabular shell consist of Titanium-6Aluminium-4Vanadium alloy (Pinnacle; DePuy®, Warsaw, IN, USA), Biolox delta femoral head consist of Zirconia toughened Alumina composite and cementless collarless femoral stem consist of Titanium-6Aluminium-4Vanadium alloy (Summit; DePuy®, Warsaw, IN, USA) were used in all of the patients. The group 1 used the Cobalt-Chromium-Molybdenum alloy (Ultamet; DePuy®, Warsaw, IN, USA) as the acetabular metal liner and group 2 used Biolox delta liners consisting of Zirconia-Alumina as a ceramic liner.
All operations were carried out by a single orthopedic surgeon (NGW), and the surgical techniques used for the procedure were identical for all patients via posterior approach. Standard postoperative care and rehabilitation was carried out for all THA patients in the same manner. The patients were followed up in outpatient clinics at 1 month, 3 months, 6 months, 1 year and annually after the operation.
All operations were carried out by a single orthopedic surgeon (NGW), and the surgical techniques used for the procedure were identical for all patients via posterior approach. Standard postoperative care and rehabilitation was carried out for all THA patients in the same manner. The patients were followed up in outpatient clinics at 1 month, 3 months, 6 months, 1 year and annually after the operation.
3
Femoral Prostheses in Bipolar Hip Arthroplasty
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The femoral components used were standard-type femoral stems with smooth surfaces including CPT (Zimmer, Warsaw, IN, USA; 62 cases), Exeter (Howmedica, Benoist-Girard, France; 18 cases), C stem AMT (Depuy, Leeds, UK; 17 cases), IC straight stem (Implantcast, Buxtehude, Germany; 10 cases), Bencox® ID cemented (Corentec, Cheonan, Korea; 7 cases), and Logica cemented (Lima, Milano, Italy; 1 case). Bone cement (CMW3; Depuy, Warsaw, IN, USA) was used in all cases to fix femoral prosthetic components (Fig. 1 ).
The femoral prostheses used in cementless BHA were Tri-Lock (Depuy, Warsaw, IN, USA; 50 cases), Wagner Cone (Zimmer, Winterthur, Switzerland; 5 cases), Bencox® ID non-cemented (Corentec, Cheonan, Korea; 3 cases), Corail (Depuy J&J, Landayer, Chaumont, France; 2 cases), Summit (Depuy, Leeds, UK; 2 cases), C2 stem (Lima; 2 cases), and M/L Taper (Zimmer, Winterthur, Switzerland; 1 case) (Fig. 2 ).
The femoral prostheses used in cementless BHA were Tri-Lock (Depuy, Warsaw, IN, USA; 50 cases), Wagner Cone (Zimmer, Winterthur, Switzerland; 5 cases), Bencox® ID non-cemented (Corentec, Cheonan, Korea; 3 cases), Corail (Depuy J&J, Landayer, Chaumont, France; 2 cases), Summit (Depuy, Leeds, UK; 2 cases), C2 stem (Lima; 2 cases), and M/L Taper (Zimmer, Winterthur, Switzerland; 1 case) (
4
Retrieval Study of MoM Pinnacle Implants
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This retrieval study examined patient and implant data collected from a consecutive series of 92 MoM Pinnacle hip implants received at our centre. The acetabular components consisted of a cobalt-chromium liner paired with a titanium shell, while all heads were 36 mm in diameter, composed of cobalt-chromium and paired with Corail (n = 52) or Summit (n = 40) titanium femoral stems (both DePuy Synthes). These stems shared the same taper diameter (12/14), method of fixation (cementless), and other comparable dimensional and topographical design features.
The implants were separated into two groups: those with a primary implantation date before 2007 (pre-2007) and those implanted from 2007 onwards (2007 onwards). The rationale for using 1 January 2007 as the boundary between the two groups was based on speculation that a change in the way Pinnacle implants were manufactured had occurred in 2006, acknowledging the delay between manufacture and implantation date. Patient gender, age, and blood metal ion levels (cobalt (Co) and chromium (Cr)) were collected for both cohorts, along with the time to revision and positioning measurements of the implants.
The implants were separated into two groups: those with a primary implantation date before 2007 (pre-2007) and those implanted from 2007 onwards (2007 onwards). The rationale for using 1 January 2007 as the boundary between the two groups was based on speculation that a change in the way Pinnacle implants were manufactured had occurred in 2006, acknowledging the delay between manufacture and implantation date. Patient gender, age, and blood metal ion levels (cobalt (Co) and chromium (Cr)) were collected for both cohorts, along with the time to revision and positioning measurements of the implants.
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