{"id":5463,"date":"2025-07-01T09:00:00","date_gmt":"2025-07-01T09:00:00","guid":{"rendered":"https:\/\/www.orthogate.org\/press\/uncategorized\/shoulder-arthroplasty-implant-selection\/"},"modified":"2025-07-01T13:25:15","modified_gmt":"2025-07-01T13:25:15","slug":"shoulder-arthroplasty-implant-selection","status":"publish","type":"post","link":"https:\/\/www.orthogate.org\/press\/deep-research\/hand-upper-extremity-restoring-function-and-dexterity\/shoulder-arthroplasty-implant-selection\/","title":{"rendered":"Shoulder Arthroplasty Implant Selection"},"content":{"rendered":"

Shoulder Arthroplasty Implants: An Analysis of Types, Indications, and Selection Factors<\/b> <\/span><\/span><\/h1>\n\n

<\/p>\n

Shoulder arthroplasty, commonly known as shoulder replacement, is a surgical procedure that involves replacing the damaged parts of the shoulder joint with artificial components called implants. This procedure aims to alleviate pain, restore mobility, and improve the overall quality of life for individuals with severe shoulder conditions.<\/span><\/p>\n

Historically, shoulder arthroplasty has undergone various stages of development, starting with Dr. Jules Emile P\u00e9an’s ivory total shoulder in 1893<\/span>1<\/sup><\/span>. Since then, significant advancements in materials, designs, and geometries have led to the modern implants used today. This article provides a comprehensive analysis of the different types of shoulder arthroplasty implants available, including anatomical, reverse, and partial replacements. It discusses the indications for each type and explores the factors that influence implant selection, such as patient age, activity level, and glenoid bone quality.<\/span><\/p>\n

Types of Shoulder Arthroplasty Implants<\/b> <\/span><\/span><\/h2>\n\n

Shoulder implants are available in a few different shapes and a range of sizes. Replacement options include partial and total using either anatomic or reverse implants<\/span>2<\/sup><\/span>. Conditions that can damage the shoulder joint include:<\/span><\/p>\n

    \n
  1. Osteoarthritis<\/span><\/li>\n
  2. Rotator cuff injuries<\/span><\/li>\n
  3. Fractures<\/span><\/li>\n
  4. Rheumatoid arthritis and other inflammatory disorders<\/span><\/li>\n
  5. Osteonecrosis<\/span> 2<\/sup><\/span><\/li>\n<\/ol>\n

    Depending on the type of joint damage, the following shoulder replacement options may be recommended:<\/span><\/p>\n

    Anatomic Total Shoulder Arthroplasty<\/b> <\/span><\/span><\/h3>\n\n

    Anatomic total shoulder arthroplasty (aTSA) involves replacing both the ball (humeral head) and the socket (glenoid) of the shoulder joint with implants that closely resemble the natural anatomy of the joint<\/span>2<\/sup><\/span>. The aTSA implant typically consists of a metal ball that is attached to the upper arm bone (humerus) and a plastic socket that is fitted into the shoulder blade (scapula). The head of the implant is made of an alloy of cobalt chrome and smaller amounts of other metals or titanium, and the socket is made of high molecular weight polyethylene, which is a type of plastic<\/span>3<\/sup><\/span>.<\/span><\/p>\n

    Currently, surgeons utilize stemless humeral implants if at all possible because they minimize the trauma to the humerus by not entering the humeral canal<\/span>3<\/sup><\/span>. If the quality of the proximal humeral bone is insufficient to allow a stemless implant, then a traditional stemmed humeral component will be utilized<\/span>3<\/sup><\/span>.<\/span><\/p>\n

    Surgeons from the Hospital for Special Surgery designed a special implant called the Comprehensive Primary Shoulder System, with a cobalt-chrome or titanium ball and a titanium stem. The system’s specialized ball component creates a new humeral head that conforms to the patient’s exact anatomy<\/span>4<\/sup><\/span>.<\/span><\/p>\n

    Reverse Total Shoulder Arthroplasty<\/b> <\/span><\/span><\/h3>\n\n

    Reverse total shoulder arthroplasty (rTSA) is an alternative to aTSA that involves “reversing” the ball-and-socket configuration of the shoulder joint. In rTSA, the artificial ball is attached to the shoulder blade, and the artificial socket is attached to the upper arm bone<\/span>2<\/sup><\/span>. This design allows the deltoid muscle to take over the function of the rotator cuff. The Reverse Shoulder Prosthesis (RSP) was the first reverse shoulder design to successfully incorporate a center of rotation (COR) lateral to the glenoid<\/span>5<\/sup><\/span>. The design of the RSP baseplate provides 2000N of compression between the prosthesis-bone interface, providing stable initial fixation as well as ideal conditions for bony ingrowth for long-term fixation<\/span>5<\/sup><\/span>.<\/span><\/p>\n

    Partial Shoulder Arthroplasty<\/b> <\/span><\/span><\/h3>\n\n

    Partial shoulder arthroplasty, also known as hemiarthroplasty, involves replacing only the ball of the shoulder joint while leaving the socket intact<\/span>2<\/sup><\/span>. This procedure is typically recommended for patients with a severe fracture or arthritic conditions of the shoulder in which only the humeral head or ball of the joint is damaged and the glenoid socket is normal or intact<\/span>6<\/sup><\/span>. This surgery is often chosen in cases of avascular necrosis, a problem of bone death and cartilage collapse seen mainly on the ball side, often in younger patients with healthy glenoid cartilage<\/span>7<\/sup><\/span>.<\/span><\/p>\n

    Indications and Contraindications for Each Type of Implant<\/b> <\/span><\/span><\/h2>\n\n

    The choice of shoulder arthroplasty implant depends on several factors, including the underlying shoulder condition, the extent of joint damage, the patient’s age and activity level, and the quality of the glenoid bone. The most common indications for shoulder arthroplasty are osteoarthritis, inflammatory arthritis, proximal humerus fractures, irreparable rotator cuff tears, rotator cuff arthropathy, and avascular necrosis of the humeral head<\/span>8<\/sup><\/span>.<\/span><\/p>\n

    Anatomic Total Shoulder Arthroplasty<\/b> <\/span><\/span><\/h3>\n\n

    aTSA is indicated for patients with end-stage glenohumeral arthritis who have an intact and functional rotator cuff<\/span>3<\/sup><\/span>. This type of implant is designed to restore the normal biomechanics of the shoulder joint and provide pain relief, improved range of motion, and increased strength<\/span>3<\/sup><\/span>.<\/span><\/p>\n

    Contraindications:<\/b> <\/span><\/p>\n

      \n
    1. Insufficient glenoid bone stock<\/span><\/li>\n
    2. Rotator cuff arthropathy<\/span><\/li>\n
    3. Deltoid dysfunction<\/span><\/li>\n
    4. Active infection<\/span><\/li>\n
    5. Brachial plexus palsy<\/span> 10<\/sup><\/span><\/li>\n<\/ol>\n

      Reverse Total Shoulder Arthroplasty<\/b> <\/span><\/span><\/h3>\n\n

      rTSA is indicated for patients with rotator cuff tear arthropathy, irreparable rotator cuff tears, or failed previous shoulder replacements with rotator cuff deficiency<\/span>11<\/sup><\/span>. This type of implant is designed to provide pain relief and improve shoulder function in patients with compromised rotator cuff muscles<\/span>11<\/sup><\/span>.<\/span><\/p>\n

      Contraindications:<\/b> <\/span><\/p>\n

        \n
      1. Good rotator cuff function<\/span><\/li>\n
      2. Active infection<\/span><\/li>\n
      3. Severe osteoporosis<\/span><\/li>\n
      4. Poor general health<\/span><\/li>\n
      5. Unrealistic expectations<\/span> 12<\/sup><\/span><\/li>\n<\/ol>\n

        Partial Shoulder Arthroplasty<\/b> <\/span><\/span><\/h3>\n\n

        Partial shoulder arthroplasty is indicated for patients with isolated damage to the humeral head, such as a severe fracture or arthritis, when the glenoid socket is still in good condition<\/span>6<\/sup><\/span>. This procedure is less invasive than total shoulder arthroplasty and may be suitable for younger patients or those with lower functional demands<\/span>6<\/sup><\/span>.<\/span><\/p>\n

        Contraindications:<\/b> <\/span><\/p>\n

          \n
        1. Coracoacromial ligament deficiency<\/span> 14<\/sup><\/span><\/li>\n
        2. Infection<\/span><\/li>\n
        3. Neuropathic joint<\/span><\/li>\n
        4. Unmotivated patient<\/span> 14<\/sup><\/span><\/li>\n<\/ol>\n

          Factors Influencing Implant Selection<\/b> <\/span><\/span><\/h2>\n\n

          Patient Age<\/b> <\/span><\/span><\/h3>\n\n

          Patient age is an important factor to consider when selecting a shoulder arthroplasty implant. Younger patients tend to be more active and have higher functional demands, which may influence the choice of implant and the surgical approach<\/span>15<\/sup><\/span>. Older patients may have decreased bone density and muscle strength, which may affect the stability and longevity of the implant<\/span>17<\/sup><\/span>. Patient age and baseline platelet count are also considerable influences<\/span>18<\/sup><\/span>.<\/span><\/p>\n

          Activity Level<\/b> <\/span><\/span><\/h3>\n\n

          The patient’s activity level is another crucial factor in implant selection. Patients who engage in high-impact activities or have physically demanding jobs may require a more durable implant that can withstand greater stress and wear<\/span>19<\/sup><\/span>. Conversely, patients with lower activity levels may be suitable candidates for less invasive procedures or implants that preserve more bone stock<\/span>19<\/sup><\/span>. The member’s deltoid must be intact, and the member must have at least 90 degrees of passive shoulder range of motion (elevation\/flexion)<\/span>21<\/sup><\/span>.<\/span><\/p>\n

          Glenoid Bone Quality<\/b> <\/span><\/span><\/h3>\n\n

          The quality of the glenoid bone is essential for the success of shoulder arthroplasty. Adequate bone stock is necessary to ensure secure fixation of the glenoid component<\/span>22<\/sup><\/span>. Patients with significant glenoid bone loss may require specialized implants, such as augmented glenoid components or bone grafting, to achieve stability and prevent implant loosening<\/span>24<\/sup><\/span>. Glenoid deformity has an important effect on outcomes and complication rates after shoulder arthroplasty for primary glenohumeral arthritis. The B2\/B3 glenoid has particularly been associated with a poorer outcome with shoulder arthroplasty compared with other glenoid types<\/span>25<\/sup><\/span>. One of the primary challenges is striking a balance between deformity correction and joint line preservation<\/span>25<\/sup><\/span>.<\/span><\/p>\n

          Different types of glenoid components are available, including keeled, pegged, and metal-backed components<\/span>26<\/sup><\/span>. The choice of glenoid component depends on factors such as the amount of bone loss, the desired level of stability, and the surgeon’s preference.<\/span><\/p>\n

          Clinical Trials and Studies<\/b> <\/span><\/span><\/h2>\n\n

          Several clinical trials and studies have compared the outcomes of different types of shoulder arthroplasty implants. These studies have provided valuable insights into the effectiveness, longevity, and complications associated with each type of implant.<\/span><\/p>\n

          | Study |<\/span><\/p>\n

          Works cited<\/b><\/span><\/h4>\n\n

          1. Common Factors in Shoulder and Hip Arthroplasty Implant Failures: A Historical Review, accessed February 17, 2025, https:\/\/www.mdpi.com\/2077-0383\/13\/8\/2370<\/a><\/p>\n

          2. Shoulder replacement surgery – Mayo Clinic, accessed February 17, 2025, https:\/\/www.mayoclinic.org\/tests-procedures\/shoulder-replacement\/about\/pac-20519121<\/a><\/p>\n

          3. Anatomic and Reverse Total Shoulder Replacement – Robert Tashjian, MD, accessed February 17, 2025, https:\/\/www.roberttashjianmd.com\/anatomic-and-reverse-total-shoulder-replacement-orthopaedics-surgeon-salt-lake-city-ut.html<\/a><\/p>\n

          4. Shoulder Replacement Surgery | HSS Orthopedics, accessed February 17, 2025, https:\/\/www.hss.edu\/condition-list_shoulder-replacement.asp<\/a><\/p>\n

          5. Reverse Shoulder Prosthesis\u00ae (RSP\u00ae) – Enovis, accessed February 17, 2025, https:\/\/enovis.com\/products\/surgical\/reverse-shoulder-prosthesis-rsp<\/a><\/p>\n

          6. Partial Shoulder Replacement | Advanced Orthopaedics & Sports Medicine, Orthopaedic Specialists, Cypress, Houston, TX, accessed February 17, 2025, https:\/\/www.advancedosm.com\/partial-shoulder-replacement-orthopaedic-sports-medicine-specialist-cypress-houston-tx\/<\/a><\/p>\n

          7. Partial and Total Shoulder Replacement | Summit Health, accessed February 17, 2025, https:\/\/www.summithealth.com\/partial-and-total-shoulder-replacement<\/a><\/p>\n

          8. Shoulder Arthroplasty, from Indications to Complications: What the Radiologist Needs to Know | RadioGraphics – RSNA Journals, accessed February 17, 2025, https:\/\/pubs.rsna.org\/doi\/abs\/10.1148\/rg.2016150055<\/a><\/p>\n

          9. Standard (Anatomic) Total Shoulder Replacement | Dr. Gordon Groh, accessed February 17, 2025, https:\/\/www.drgordongroh.com\/orthopaedic-injuries-treatment\/shoulder\/standard-total-shoulder-replacement\/<\/a><\/p>\n

          10. Total Shoulder Arthroplasty – Shoulder & Elbow – Orthobullets, accessed February 17, 2025, https:\/\/www.orthobullets.com\/shoulder-and-elbow\/3075\/total-shoulder-arthroplasty<\/a><\/p>\n

          11. Reverse Total Shoulder Replacement | Johns Hopkins Medicine, accessed February 17, 2025, https:\/\/www.hopkinsmedicine.org\/health\/treatment-tests-and-therapies\/reverse-total-shoulder-replacement<\/a><\/p>\n

          12. Reverse Shoulder Replacement | HSS Sports Medicine, accessed February 17, 2025, https:\/\/www.hss.edu\/conditions_reverse-shoulder-replacement.asp<\/a><\/p>\n

          13. Shoulder hemiarthroplasty (partial replacement) – OrthoVirginia, accessed February 17, 2025, https:\/\/www.orthovirginia.com\/shoulder-hemiarthroplasty-partial-replacement\/<\/a><\/p>\n

          14. Shoulder Hemiarthroplasty – Shoulder & Elbow – Orthobullets, accessed February 17, 2025, https:\/\/www.orthobullets.com\/shoulder-and-elbow\/3074\/shoulder-hemiarthroplasty<\/a><\/p>\n

          15. Effect of Age on Outcomes of Shoulder Arthroplasty – PMC, accessed February 17, 2025, https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5499606\/<\/a><\/p>\n

          16. Evaluating the effects of age on the long-term functional outcomes following anatomic total shoulder arthroplasty, accessed February 17, 2025, https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10497918\/<\/a><\/p>\n

          17. The Impact of Age on Reverse Shoulder Joint Replacement Outcomes, accessed February 17, 2025, https:\/\/www.jointinstitutefl.com\/2024\/05\/17\/the-impact-of-age-on-reverse-shoulder-joint-replacement-outcomes\/<\/a><\/p>\n

          18. Identifying the Patient, Disease, Surgical and Implant Positional Factors that Predict Outcomes Following Total Shoulder Arthroplasty – Consult QD, accessed February 17, 2025, https:\/\/consultqd.clevelandclinic.org\/identifying-the-patient-disease-surgical-and-implant-positional-factors-that-predict-outcomes-following-total-shoulder-arthroplasty<\/a><\/p>\n

          19. A Medical Professional’s Resource: Shoulder Replacement for Treatment of Glenohumeral Arthritis in Younger Patients – Brown University Health, accessed February 17, 2025, https:\/\/www.brownhealth.org\/centers-services\/total-joint-replacement\/surgical-specialties\/medical-resource<\/a><\/p>\n

          20. Return to sports after shoulder arthroplasty – PMC, accessed February 17, 2025, https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5027006\/<\/a><\/p>\n

          21. Shoulder Arthroplasty and Arthrodesis – Medical Clinical Policy Bulletins | Aetna, accessed February 17, 2025, https:\/\/www.aetna.com\/cpb\/medical\/data\/800_899\/0837.html<\/a><\/p>\n

          22. Glenoid bone loss in shoulder arthroplasty: a narrative review – PMC – PubMed Central, accessed February 17, 2025, https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10929280\/<\/a><\/p>\n

          23. Glenoid Component Failure in Total Shoulder Arthroplasty – UW Orthopaedic Surgery and Sports Medicine, accessed February 17, 2025, https:\/\/orthop.washington.edu\/sites\/default\/files\/Portals\/21\/www\/Research\/Publications\/The%20Journal%20of%20Bone%20and%20Joint%20Surgery%20%28JBJS%29\/Glenoid%20Component%20Failure%20in%20Total%20Shoulder%20Arthroplasty%20%28Frederick%20Matsen%29.pdf<\/a><\/p>\n

          24. The glenoid in shoulder arthroplasty – Dr. Eric Strauss, accessed February 17, 2025, https:\/\/www.sportssurgerynewyork.com\/articles\/the-glenoid-shoulder-arthroplasty.pdf<\/a><\/p>\n

          25. Considerations for Shoulder Arthroplasty Implant Selection in Primary Glenohumeral Arthritis With Posterior Glenoid Deformity – PubMed, accessed February 17, 2025, https:\/\/pubmed.ncbi.nlm.nih.gov\/36027046\/<\/a><\/p>\n

          26. Implant selection for successful reverse total shoulder arthroplasty – PMC – PubMed Central, accessed February 17, 2025, https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10030993\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

          Shoulder Arthroplasty Implants: An Analysis of Types, Indications, and Selection Factors Shoulder arthroplasty, commonly known as shoulder replacement, is a surgical procedure that involves replacing the damaged parts of the shoulder joint with artificial components called implants. This procedure aims to alleviate pain, restore mobility, and improve the overall quality of life for individuals with […]<\/p>\n","protected":false},"author":1,"featured_media":5462,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[531],"tags":[936,358,940,565,162,938,937,939,934,935],"class_list":["post-5463","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hand-upper-extremity-restoring-function-and-dexterity","tag-anatomical","tag-fractures","tag-glenoid-bone","tag-implants","tag-osteoarthritis","tag-partial","tag-reverse","tag-rotator-cuff","tag-shoulder-arthroplasty","tag-shoulder-replacement"],"_links":{"self":[{"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/posts\/5463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/comments?post=5463"}],"version-history":[{"count":0,"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/posts\/5463\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/media\/5462"}],"wp:attachment":[{"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/media?parent=5463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/categories?post=5463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.orthogate.org\/press\/wp-json\/wp\/v2\/tags?post=5463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}