New Generation Titanium Biologically Fixed Threaded Implants in Jawbone and Hip Joint

Christodoulou, Nikolaos

doi:10.15406/mojor.2017.09.00371

Cited by 1 publication

(4 citation statements)

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“…New generation threaded cups have already shown a high primary stability, representing an essential factor for good subsequent osteointegration and, hence, also for long-term secondary stability [ 5 , 6 , 18 , 19 , 20 ]. The DELTA ST-C cup is a cementless primary implant with screw-in fixation, which is characterized by a hemispheric design and is also provided with helicoids designed to guarantee optimal initial stability and to support torsional loads weighing in the equatorial area, without interrupting the continuity at the bone wall and encompassing considerable bone saving [ 8 ].…”

Section: Discussionmentioning

confidence: 99%

“…Threaded cups have exhibited biomechanical advantages when compared to press fit cups, but they are not commonly used in every-day clinical practice [ 7 ]. The main reason seems to be that between 1970 and the 1980s, first generation threaded cups with a smooth surface were widely used and had high failure rates, due to the lack of bony ingrowth [ 6 , 7 , 19 ]. The main concerns were early loosening, cup breakage and soft tissue damage, as well as difficulty in removing the cup in revision cases [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

“…The main concerns were early loosening, cup breakage and soft tissue damage, as well as difficulty in removing the cup in revision cases [ 7 ]. Second and third generation threaded cups have a porous coating, allowing for bony ingrowth [ 6 , 19 ]. Nevertheless, they are not considered the most “popular” choice of cup implant.…”

Section: Discussionmentioning

confidence: 99%

“…The new generation of threaded cups has shown a high primary stability which is essential for a good subsequent osteointegration and, thus, also for long-term secondary stability [ 5 , 6 ]. The primary stability of these components is based on a press-fit situation by threads screwed into the bone, and it depends on several factors, such as the design of the rim, the cup’s geometry, the implant material, as well as the surface finishing [ 5 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Early Clinical and Radiographic Outcomes of Total Hip Arthroplasty with DELTA ST-C Cup and MINIMA S Stem

et al. 2023

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Background and Objectives: The uncemented threaded DELTA ST-C cup was introduced in last few years. It has a hemispheric shell, consisting of Ti6Al4V titanium alloy. The MINIMA S stem was developed according to the principles of proximal-loading and extended metaphyseal geometry applied to a short stem. The purpose of the study was to assess the clinical and radiographic outcomes and the short- and mid-term survivorship of the DELTA ST-C cup and MINIMA S stem in patients undergoing total hip arthroplasty (THA). The present is the first study to report outcomes and implant survivorship of the DELTA ST-C cup coupled with the MINIMA S femoral stem. Materials and Methods: The present study is a retrospective observational cohort study of a prospectively maintained database, evaluating clinical outcomes and implant survivorship in 95 patients undergoing THA with the MINIMA stem coupled with the DELTA ST-C cup with at least a 3-year follow-up. The clinical evaluation was assessed with a change in the Harris hip score (HHS), while the radiographic evaluation included anteroposterior views of the pelvis and lateral views of the affected hip. Results: The enrolled population’s mean age was 69.3 years and most patients were female (64%). The MINIMA S standard stem was implanted in 68 patients (72%), the lateralized stem was implanted in 27 (28%), and the mean acetabular inclination was 48.2°. The HHS improved significantly from the preoperative value (median 46, IQR: 38–55), already at 1 month after surgery (median 76, IQR: 66–77), reaching excellent results at 1 year and 3 years postoperatively (median 96, IQR: 91–100). X-rays demonstrated good implant stability and biomechanics parameter restorations revealed no sign of subsidence, and the presence of radiolucent lines greater than 2 mm in the short stem area in five cases and in the acetabulum in one were not clinically significant. No revisions have been performed so far. Conclusions: The MINIMA S stem coupled with the DELTA ST-C cup demonstrated very good clinical and radiological results with a significant increase of the Harris hip score at short- and mid-term follow-up. This is the first study evaluating the DELTA ST-C cup, showing promising outcomes during the study’s follow-up. The MINIMA S stem has been evaluated in a very few studies. However, the combination with this particular cup had not yet been studied. The design of the stem and the cup ensures primary stability and excellent early term outcomes, moreover the study demonstrates extraordinary implant survivorship, equal to 100%.

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Section: Discussionmentioning

confidence: 99%