title: Anatomic stemless shoulder arthroplasty and related outcomes: a systematic review.
abstract: The latest generation of shoulder arthroplasty includes canal-sparing respectively stemless designs that have been developed to allow restoration of the glenohumeral center of rotation independently from the shaft, and to avoid stem-related complications. The stemless prosthesis design has also recently been introduced for use in reverse arthroplasty systems.
  
  
  
  We systematically reviewed the literature for studies of currently available canal-sparing respectively stemless shoulder arthroplasty systems. From the identified series, we recorded the indications, outcome measures, and humeral-sided complications.
  
  
  
  We identified 11 studies of canal-sparing respectively stemless anatomic shoulder arthroplasty implants, published between 2010 and 2016. These studies included 929 cases, and had a mean follow-up of 26 months (range, 6 to 72 months). The rates of humeral component-related complications ranged between 0 and 7.9 %. The studies reported only a few isolated cases of complications of the humeral component. Some arthroplasty systems are associated with radiological changes, but without any clinical relevance.
  
  
  
  All of the published studies of canal-sparing respectively stemless shoulder arthroplasty reported promising clinical and radiological outcomes in short to midterm follow-up. Long-term studies are needed to demonstrate the long-term value of these kind of implants.
authors: Department of Shoulder and Elbow Surgery, ATOS Clinic Munich, Effnerstraße 38, 81925, München, Germany. hawi.nael@mh-hannover.de.|Trauma Department, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany. hawi.nael@mh-hannover.de.
authors: Nael
authors: N
authors: Hawi
authors: Department of Shoulder and Elbow Surgery, ATOS Clinic Munich, Effnerstraße 38, 81925, München, Germany.|Department of Traumatology and Sports Injuries, Paracelsus Medical University, Salzburg, Austria.
authors: Mark
authors: M
authors: Tauber
authors: Department of Shoulder and Elbow Surgery, ATOS Clinic Munich, Effnerstraße 38, 81925, München, Germany.|Boston Shoulder Institute/Harvard Medical School, Boston, MA, USA.
authors: Michael Joseph
authors: MJ
authors: Messina
authors: Department of Shoulder and Elbow Surgery, ATOS Clinic Munich, Effnerstraße 38, 81925, München, Germany.
authors: Peter
authors: P
authors: Habermeyer
authors: Department of Shoulder and Elbow Surgery, ATOS Clinic Munich, Effnerstraße 38, 81925, München, Germany.|Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University, Munich, Germany.
authors: Frank
authors: F
authors: Martetschläger
mesh_terms: D019643:Arthroplasty, Replacement / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D006811:Humerus; D007595:Joint Prosthesis; D010003:Osteoarthritis / Q000601:surgery*; D011183:Postoperative Complications / Q000453:epidemiology*; D011474:Prosthesis Design; D011859:Radiography; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome
keywords: Canal-sparing; Posttraumatic shoulder arthritis; Shoulder arthritis; Shoulder arthroplasty; Stemless; Total shoulder arthroplasty