People

Nicholas Maassen, MD

  • Associate Professor of Orthopedic Surgery and Rehabilitation Medicine
  • Clinical Interests: Arthritis, Arthroscopic Shoulder Surgery, Elbow Surgery, Fractures, Osteoarthritis, Shoulder Injuries, Shoulder Instability or Dislocation, Shoulder Tendonitis, Upper Extremity Surgery
  • Websites: Research Network Profile
  • Contact: nmaassen@bsd.uchicago.edu

A focused PubMed artificial intelligence search program creates better literature reviews than general purpose artificial intelligence and is comparable to trainees in shoulder and elbow surgery.
A focused PubMed artificial intelligence search program creates better literature reviews than general purpose artificial intelligence and is comparable to trainees in shoulder and elbow surgery. JSES Int. 2026 Nov; 10(6):101790.
PMID: 42893063

Internal Rotation and Transthoracic Lateral Radiographs Frequently Disagree on Sagittal Angulation in Humeral Shaft Fractures (AO/OTA 12).
Internal Rotation and Transthoracic Lateral Radiographs Frequently Disagree on Sagittal Angulation in Humeral Shaft Fractures (AO/OTA 12). J Orthop Trauma. 2026 Sep 01; 40(9):e198-e206.
PMID: 41995472

Anatomical versus reverse total shoulder arthroplasty for primary glenohumeral osteoarthritis with an intact rotator cuff : a systematic review.
Anatomical versus reverse total shoulder arthroplasty for primary glenohumeral osteoarthritis with an intact rotator cuff : a systematic review. Bone Jt Open. 2026 Aug 12; 7(8):1056-1063.
PMID: 42580702

Pre-operative deltoid fatty infiltration as a predictor of outcomes after reverse total shoulder arthroplasty: a systematic review.
Pre-operative deltoid fatty infiltration as a predictor of outcomes after reverse total shoulder arthroplasty: a systematic review. JSES Rev Rep Tech. 2026 Nov; 6(4):100835.
PMID: 42824400

AI-Assisted MRI Interpretation in Diagnosing Bankart and Reverse Bankart Lesions.
AI-Assisted MRI Interpretation in Diagnosing Bankart and Reverse Bankart Lesions. Am J Sports Med. 2026 Jul; 54(9):2244-2252.
PMID: 42200663

Low glenoid neck Hounsfield units predict patients at high risk of mechanical complication after total shoulder arthroplasty.
Low glenoid neck Hounsfield units predict patients at high risk of mechanical complication after total shoulder arthroplasty. J Shoulder Elb Arthroplast. 2026 Jun; 10(1-2):100001.
PMID: 41960151

SCOPE-MRI: Bankart Lesion Detection as a Case Study in Data Curation and Deep Learning for Challenging Diagnoses.
SCOPE-MRI: Bankart Lesion Detection as a Case Study in Data Curation and Deep Learning for Challenging Diagnoses. NPJ Artif Intell. 2025 Dec 01.
PMID: 41333195

The "angle" method of calculating glenoid bone loss: a validation study and review of current methods.
The "angle" method of calculating glenoid bone loss: a validation study and review of current methods. JSES Int. 2026 Jan; 10(1):101394.
PMID: 41404597

Administration of Perioperative Tranexamic Acid and Range of Motion After Total Shoulder Arthroplasty.
Administration of Perioperative Tranexamic Acid and Range of Motion After Total Shoulder Arthroplasty. J Shoulder Elb Arthroplast. 2025; 9:24715492251348793.
PMID: 40746655

Restoration of rotator cuff muscle forces in lower trapezius transfer and superior capsular reconstruction in massive rotator cuff tear.
Restoration of rotator cuff muscle forces in lower trapezius transfer and superior capsular reconstruction in massive rotator cuff tear. JSES Int. 2025 Sep; 9(5):1532-1540.
PMID: 41049683

View All Publications