Die inverse Schulterendoprothese Delta Xtend

Gruber, Sabine; Schoch, Christian; Geyer, Michaël

doi:10.1007/s00132-016-3355-5

Cited by 8 publications

(1 citation statement)

References 11 publications

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“…Scapular notching is a frequently reported complication of Grammont reverse total shoulder arthroplasty (RTSA), occurring in 44 % to 93 % of patients [1][2][3][4] . Notching can appear within the first few postoperative months of a patient undergoing RTSA and may continue to progress over time 1,4,5 . This condition is also sometimes accompanied by screw fracture and implant loosening 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Impact of scapular notching on glenoid fixation in reverse total shoulder arthroplasty: an in vitro and finite element study

Zhang

Junaid

Grégory

et al. 2020

Journal of Shoulder and Elbow Surgery

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Background: The high incidence of scapular notching in reverse total shoulder arthroplasty (RTSA) has spurred several methods to minimize the bone loss. However, up to 93 % of RTSA with accompanying scapular notching have been reported to maintain good implant stability for over 10 years. The purpose of this study is to investigate the correlation between scapular notching and glenoid fixation in RTSA.Methods: An in-vitro setup was used to measure the notch-induced variations of the strain on the scapular surface and the micromotion at the bone-prosthesis interface during arm abductions of 30°, 60° and 90°. Finite element analysis (FEA) was used to study the bone and screw stresses as well as the bone-prosthesis micromotion in cases of a grade 4 notch during complicated arm motions.Results: The notch resulted in an apparent increase of inferior screw stress in the root of the screw cap and the notch-screw conjunction. However, the maximal stress (172 MPa) along the screw after notch is still much less than the fatigue strength of the titanium screw (600 MPa) under cyclic loading. The bone-prosthesis micromotion results did not present significant notch-induced variations.Conclusions: Scapular notching will not lead to significant effects on the initial stability of glenoid component in RTSA. This finding may explain the long-term longevity of RTSA in cases of severe scapular notching. The relationship between scapular notching and weak regions along the inferior screw may explain why fractures of the inferior screw are sometimes reported in patients with RTSA clinically.

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Section: Introductionmentioning

confidence: 99%

Impact of scapular notching on glenoid fixation in reverse total shoulder arthroplasty: an in vitro and finite element study

Zhang

Junaid

Grégory

et al. 2020

Journal of Shoulder and Elbow Surgery

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Complications and revisions in anatomic and reverse short stem shoulder arthroplasty

Loew¹,

Schnetzke²,

Kappes³

et al. 2023

Arch Orthop Trauma Surg

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Introduction One current trend in the field of shoulder arthroplasty is a design shift to shorter and metaphyseal fixed humeral stem components. The aim of this investigation is to analyze complications resulting in revision surgery after anatomic (ASA) and reverse (RSA) short stem arthroplasty. We hypothesize that complications are influenced by the type of prosthesis and indication for arthroplasty. Materials and methods A total of 279 short stem shoulder prostheses were implanted by the same surgeon (162 ASA; 117 RSA), and 223 of these prostheses were implanted as primary procedures; in 54 cases, arthroplasty was performed secondary to prior open surgery. Main indications were osteoarthritis (OA) (n = 134), cuff tear arthropathy (CTA) (n = 74) and posttraumatic deformities (PTr) (n = 59). Patients were evaluated at 6 weeks (follow-up 1; FU1), 2 years (FU2) and the time span of the last follow-up defined as FU3 with a minimum FU of 2 years. Complications were categorized into early complications (within FU1), intermediate complications (within FU2) and late complications (> 2 years; FU3). Results In total, 268 prostheses (96.1%) were available for FU1; 267 prostheses (95.7%) were available for FU2 and 218 prostheses (77.8%) were available for FU3. The average time for FU3 was 53.0 months (range 24–95). A complication leading to revision occurred in 21 prostheses (7.8%), 6 (3.7%) in the ASA group and 15 (12.7%) in the RSA group (p < 0.005). The most frequent cause for revision was infection (n = 9; 42.9%). After primary implantation, 3 complications (2.2%) occurred in the ASA and 10 complications (11.0%) in the RSA group (p < 0.005). The complication rate was 2.2% in patients with OA, 13.5% in CTA and 11.9% in PTr. Conclusions Primary reverse shoulder arthroplasty had a significantly higher rate of complications and revisions than primary and secondary anatomic shoulder arthroplasty, respectively. Therefore, indications for reverse shoulder arthroplasty should be critically questioned in each individual case.

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Long-term results of reverse total shoulder arthroplasty for rotator cuff dysfunction: a systematic review of longitudinal outcomes

Ernstbrunner

Andronic

Grubhofer

et al. 2019

Journal of Shoulder and Elbow Surgery

150

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Die inverse Schulterendoprothese Delta Xtend

Abstract: This study confirms good early results after RSA after more than 5 years. We see very good outcomes in patients with CTA and omarthrosis, whilst the rate of complication is low.

Cited by 8 publications

References 11 publications

Impact of scapular notching on glenoid fixation in reverse total shoulder arthroplasty: an in vitro and finite element study

Impact of scapular notching on glenoid fixation in reverse total shoulder arthroplasty: an in vitro and finite element study

Complications and revisions in anatomic and reverse short stem shoulder arthroplasty

Long-term results of reverse total shoulder arthroplasty for rotator cuff dysfunction: a systematic review of longitudinal outcomes

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