Quick answer: An anatomic total shoulder replacement replaces the worn ball and socket of an arthritic shoulder with implants shaped like the natural joint. It is the standard replacement for osteoarthritis when the rotator cuff is healthy, it reliably relieves pain, and about 9 in 10 are still working 10 years later [1, 2, 7]. Compared with a reverse replacement, it tends to give better rotation, while pain relief and overhead motion are similar [3–6].
How It Works
In an anatomic replacement, the arthritic ball at the top of the arm bone is replaced with a smooth metal ball, and the socket is resurfaced with a plastic (polyethylene) component. Because the design copies normal anatomy, the patient's own rotator cuff continues to move and stabilize the shoulder.
For osteoarthritis, the AAOS clinical practice guideline rates the evidence as strong that a total shoulder replacement gives better function and pain relief than replacing the ball alone [1, 2]. For more on partial replacement, see Understanding Hemiarthroplasty and Pyrocarbon Shoulder Replacement.
Who Is a Good Candidate?
- Shoulder osteoarthritis with a working rotator cuff
- Pain that limits sleep or daily activities despite therapy, medication and injections
- Enough healthy socket bone to support the plastic component
A reverse replacement is usually preferred when the rotator cuff is torn or not working, when there is major socket bone loss, or for some fractures. X-ray features such as a high critical shoulder angle have also been linked to later revision of anatomic replacements [11].
Anatomic vs. Reverse: What Patients Notice
- Rotation: anatomic replacements tend to give better turning-out (external rotation) and reaching behind the back, including in shoulders that were stiff before surgery [3, 4].
- Overhead motion and pain relief: similar. In patients 70 and older, nearly all patients after either type rated their overhead motion as full or nearly full [5], and a 2024 meta-analysis found similar improvements overall [6].
How Long Does It Last?
About 95% of total shoulder replacements were still working at 10 years in published case series, and about 92% in national registry data [7]. The most common long-term problems are wear or tearing of the rotator cuff and loosening of the plastic socket component [8, 9]. Smoking is a major risk factor: about 10 years after anatomic replacement, revision rates were 7.7% in non-smokers compared with 37.5% in current smokers [10].
What Recovery Looks Like
Most patients go home the same day or after one night. A sling is worn for several weeks while the subscapularis tendon, which is released to reach the joint, heals. Therapy progresses from gentle motion to strengthening over three to six months, and improvement continues for up to a year.
For a detailed comparison of results, revision risk and causes of revision, see Anatomic Total Shoulder Replacement.
References
- American Academy of Orthopaedic Surgeons. Management of Glenohumeral Joint Osteoarthritis: Evidence-Based Clinical Practice Guideline. 2020. www.aaos.org/globalassets/quality-and-pr
- Bryant D, Litchfield R, Sandow M, et al. A comparison of pain, strength, range of motion, and functional outcomes after hemiarthroplasty and total shoulder arthroplasty in patients with osteoarthritis of the shoulder. A systematic review and meta-analysis. J Bone Joint Surg Am. 2005;87(9):1947-56. PubMed 16140808 · doi.org/10.2106/JBJS.D.02854
- Hao KA, Hones KM, Elwell J, et al. Anatomic Versus Reverse Total Shoulder Arthroplasty for Primary Osteoarthritis With an Intact Rotator Cuff: A Midterm Comparison of Early Top Performers. J Am Acad Orthop Surg. 2024;32(21):e1102-e1110. PubMed 38996212 · doi.org/10.5435/JAAOS-D-24-00110
- Hao KA, Greene AT, Werthel JD, et al. Clinical outcomes of anatomic vs. reverse total shoulder arthroplasty in primary osteoarthritis with preoperative rotational stiffness and an intact rotator cuff: a case control study. J Shoulder Elbow Surg. 2023;32(7):e355-e365. PubMed 36737034 · doi.org/10.1016/j.jse.2022.12.027
- Wright MA, Keener JD, Chamberlain AM. Comparison of Clinical Outcomes After Anatomic Total Shoulder Arthroplasty and Reverse Shoulder Arthroplasty in Patients 70 Years and Older With Glenohumeral Osteoarthritis and an Intact Rotator Cuff. J Am Acad Orthop Surg. 2020;28(5):e222-e229. PubMed 31356423 · doi.org/10.5435/JAAOS-D-19-00166
- Vij N, Tummala S, Shahriary E, et al. Total Shoulder Arthroplasty Versus Reverse Shoulder Arthroplasty in Primary Glenohumeral Osteoarthritis With Intact Rotator Cuffs: A Meta-Analyses. Cureus. 2024;16(4):e57866. PubMed 38725735 · doi.org/10.7759/cureus.57866
- Evans JP, Evans JT, Craig RS, et al. How long does a shoulder replacement last? A systematic review and meta-analysis of case series and national registry reports with more than 10 years of follow-up. Lancet Rheumatol. 2020;2(9):e539-e548. PubMed 38273618 · doi.org/10.1016/S2665-9913(20)30226-5
- Young AA, Walch G, Pape G, et al. Secondary rotator cuff dysfunction following total shoulder arthroplasty for primary glenohumeral osteoarthritis: results of a multicenter study with more than five years of follow-up. J Bone Joint Surg Am. 2012;94(8):685-93. PubMed 22419408 · doi.org/10.2106/JBJS.J.00727
- Orvets ND, Chan PH, Taylor JM, et al. Similar rates of revision surgery following primary anatomic compared with reverse shoulder arthroplasty in patients aged 70 years or older with glenohumeral osteoarthritis: a cohort study of 3791 patients. J Shoulder Elbow Surg. 2023;32(9):1893-1900. PubMed 37075936 · doi.org/10.1016/j.jse.2023.03.021
- White CA, Patel AV, Wang KC, et al. The impact of tobacco use on clinical outcomes and long-term survivorship after anatomic total shoulder arthroplasty. J Orthop. 2023;36:99-105. PubMed 36659901 · doi.org/10.1016/j.jor.2023.01.002
- Tabeayo E, Chan PH, Prentice HA, et al. The association between critical shoulder angle and revision following anatomic total shoulder arthroplasty: a matched case-control study. J Shoulder Elbow Surg. 2022;31(9):1796-1802. PubMed 34481051 · doi.org/10.1016/j.jse.2021.08.003