Promising results after hemi-shoulder arthroplasty using pyrolytic carbon heads in young and middle-aged patients.

Introduction: The objective of this prospective cohort study was the assessment of short-term outcome results of shoulder hemiarthroplasty (HA) using pyrolytic carbon (PC) heads. PC has been introduced as a new material to avoid surgical revision due to glenoid erosion after HA. Glenoid erosion due to the use of metallic heads is known to reduce durability.

Muscle Activity of the Latissimus Dorsi after Tendon Transfer in Patients with Rotator Cuff Tears.

: Massive irreparable posterosuperior rotator cuff tears may result in the loss of external rotation. Most of the patients with posterosuperior rotator cuff tears suffer from a restriction in their daily life actions. Latissimus dorsi tendon transfer (LDTT) is a method to restore abduction and external rotation in these patients.

Does the degree of osteoarthritis influence the clinical outcome after anatomic total shoulder arthroplasty?

Background: The degree of preoperative osteoarthritis has been shown to influence the postoperative outcome and the patients' satisfaction rate in hip and knee joint replacement surgery. However, no corresponding information is available for total shoulder arthroplasty (TSA). We therefore set out to evaluate the influence of preoperatively measured end-stage osteoarthritis on the postoperative clinical outcome of TSA.

The subchondral bone layer and glenoid implant design are relevant for primary stability in glenoid arthroplasty.

Background: Clinical studies suggest that reaming of the subchondral bone layer to achieve good implant seating is a risk factor for glenoid loosening. This study aims to evaluate (1) the importance of the subchondral bone layer and (2) the influence of the design of the glenoid component.

Methods: Different techniques for preparation of an A1 glenoid were compared: (1) preserving the subchondral bone layer; (2) removal of the subchondral bone layer; (3) implantation of a glenoid component that does not adapt to the native anatomy.

Getting back in the game after humeral head resurfacing.

Background: Aim of this investigation was to analyze whether patients undergoing humeral head resurfacing (HHR) surgery are able to successfully return to their sports and occupation afterwards.

Materials And Methods: Fifty patients treated with CUP (HHR) arthroplasty were included. Two groups were built: Patients who have participated in sports less than 5 years prior surgery (Group 1: n = 42 (84%)) and patients who have never participated in sports (Group 2: n = 8 (16%)).

Replacement options for the B2 glenoid in osteoarthritis of the shoulder: a biomechanical study.

Background: Glenoid replacement in cases of severe glenoid retroversion (RV) or eccentric wear is challenging. The aim of this study was to evaluate different treatment methods under standardized conditions to assist surgeons in the decision-making process.

Methods: Three treatment options for severe glenoid RV (15°) were compared: (1) no RV correction; (2) complete RV correction; (3) no RV correction and implantation of a posterior augmented glenoid (PAG).

How does reverse shoulder replacement change proprioception in patients with cuff tear arthropathy? A prospective optical 3D motion analysis study.

Background: Reverse total shoulder arthroplasty (RSA) can improve function in cuff tear arthropathy (CTA) shoulders, but limited data are available on the effect of RSA on proprioception. The purpose of this study was the evaluation of the proprioception after RSA.

Method: This study included fifteen consecutive patients (n = 15) who received an RSA.

Functional results of hemi- and total shoulder arthroplasty according to diagnosis and patient age at surgery.

Background and purpose - There is a lack of information on any associations between the functional outcome and age and diagnosis in patients who have undergone shoulder arthroplasty. We therefore evaluated the functional outcome in "young" and "old" patients treated with either hemiarthroplasty (HA) or total shoulder arthroplasty (TSA) with diverse diagnoses. Patients and methods - The functional results of 496 primary shoulder arthroplasties were analyzed using the Constant score (age- and sex-adjusted) and subjective satisfaction.

Activity levels after reverse shoulder arthroplasty.

Background: Aim of this study was to analyze whether patients undergoing reverse shoulder arthroplasty (RSA) surgery are able to successfully return to sports and afterwards.

Methods: Thirty-eight patients treated with RSA for Cuff Tear Arthropathy (CTA) were included. Two sub-groups were built: Patients who have participated in sports activities within the last 5 years prior surgery [Group A: n = 21 (55 %)] and patients who have never participated in sports [Group B: n = 17 (45 %)].

Results of cementless humeral head resurfacing with cemented glenoid components.

Purpose: The aim of this study was to analyse the short- and medium-term clinical and radiographic results of cementless humeral head resurfacing in combination with a cemented glenoid component.

Methods: Thirty-five patients with a mean age of 65 years (range 42-84) and a mean follow-up of three years (two to six) were followed up. The Constant score with its subgroups as well as shoulder motions and complications were recorded.

Mid- to long-term follow-up of total shoulder arthroplasty using a keeled glenoid in young adults with primary glenohumeral arthritis.

Background: The purpose of this study was to examine the mid- to long-term functional outcome and implant survival of total shoulder arthroplasty (TSA) in adults aged 55 years or younger with primary glenohumeral arthritis. The hypothesis was that TSA would lead to improvement in functional outcome but that implant survival would decline between 5 years and 10 years postoperatively.

Materials And Methods: Between 1992 and 2004, 52 TSAs were implanted in 8 centers for primary glenohumeral arthritis in patients aged 55 years or younger.

Bone cement penetration pattern and primary stability testing in keeled and pegged glenoid components.

Background: It has been proposed that bone mineral density has an influence on cement penetration in hip and knee arthroplasty. The hypotheses of this study were that: 1) there is a negative correlation between bone mineral density (BMD) and cement penetration in cemented glenoid components; and 2) that implant design has an influence on cement penetration into the glenoid bone.

Methods: BMD of 10 pairs of fresh frozen scapulas was measured.