Research and Publications

Peer-Reviewed Publications

Radiographic Comparison of Finned, Cementless Central Pegged Glenoid Component and Conventional Cemented Pegged Glenoid Component in Total Shoulder Arthroplasty: A Prospective Randomized Study.

CM Killian, BJ Morris, KR Sochacki, MM Gombera, RE Haigler, DP O’Connor, TB Edwards.

The Journal of Shoulder and Elbow Surgery. December 2017.

Pii: S10582746(17)30593-1. Doi: 10.1016/j.jse.2017.09.014.

Radiographic lucency of the glenoid component remains a problem after cement fixation in primary total shoulder arthroplasty. Glenoid component design likely contributes to rates of glenoid lucency. There were no significant differences in the rate of glenoid lucency between the 2 groups at immediate or an average 35-month follow-up. Both techniques appear to be viable options for initial glenoid component fixation, with cementless components allowing possible osseointegration, imparting potential long-term stability.

Isolated Acetabuloplasty and Labral Repair for Combined-Type Femoroacetabular Impingement: Are We Doing Too Much?

Tjong VK, Gombera MM, Kahlenberg CA, Patel RM, Han B, Deshmane P, Terry MA

Arthroscopy: The Journal of Arthroscopic and Related Surgery. January 2017

doi: http://dx.doi.org/10.1016/j.arthro.2016.10.022

To evaluate patient outcomes after isolated arthroscopic volumetric acetabular osteoplasty and labral repair for the treatment of patients with combined femoroacetabular impingement (FAI) lesions.

Preexisting Rotator Cuff Tears as a Predictor of Outcomes in National Football League Athletes.

Gibbs DB, Lynch TS, Gombera MM, Saltzman MD, Nuber GW, Schroeder GD, Labelle M, Hollett BP.

Sports Health: A Multidisciplinary Approach. March 2016

doi: 1941738116636602

Prospective NFL athletes who have a previously diagnosed rotator cuff tear are significantly less likely to be drafted in the NFL draft and have a significantly shorter career, both in terms of total years played, games played, and games started than matched controls. The effect of a previous rotator cuff tear on career statistics is more pronounced in linemen than in athletes of other positions.

All-Arthroscopic versus Open Tenodesis of the Long Head of the Biceps Brachii

MM Gombera, CA Kahlenberg, R Nair, MD Saltzman, MA Terry.

The American Journal of Sports Medicine. May 2015; 43(5):1077-83.

doi: 10.1177/0363546515570024

Biceps tenodesis remains a reliable treatment for pathologic abnormality of the long head of the biceps. Patients undergoing an all-arthroscopic suprapectoral tenodesis in the distal aspect or distal to the bicipital groove showed similar pain relief and clinical outcomes as compared with patients undergoing open subpectoral tenodesis. Open subpectoral biceps tenodesis may carry a higher complication risk secondary to a more invasive technique.

A Computed Tomography Study of Gender Differences in Acetabular Version and Morphology: Implications for Femoroacetabular Impingement.

EP Tannenbaum, P Zhang, JD Maratt, MM Gombera, SA Holcombe, SC Wang, A Bedi, JA Goulet.

Arthroscopy, The Journal of Arthroscopic and Related Surgery. May 2015; S0749- 8063(15)00101-2.

doi: 10.1016/j.arthro.2015.02.007.

Mean global and focal acetabular anteversion was greater in women, and the prevalence of focal cephalad retroversion in the 1-o'clock position was not significantly different compared with men. Acetabular retroversion and anterior overcoverage are not more prevalent in women in the anterosuperior acetabulum, where femoroacetabular impingement most commonly occurs.

Rotator Cuff Tear and Glenohumeral Instability: A Systematic Review.

MM Gombera, JK Sekiya.

Clinical Orthopaedics and Related Research. August 2014; 472 (8): 2448-56.


Persistent pain and dysfunction after a shoulder dislocation should prompt evaluation of the rotator cuff, especially in contact or overhead athletes, patients older than 40 years, or those with nerve injury. Surgery should be considered in the appropriately active patient with a rotator cuff tear after dislocation. While the current literature suggests improved stability and function after surgical repair of the rotator cuff, higher-quality prospective studies are necessary to make definitive conclusions.

Interventions for Hip Pain in the Maturing Athlete: The Role of Hip Arthroscopy?

MM Gombera, BT Kelly, A Bedi.

Sports Health: A Multidisciplinary Approach. January 2014;6(1):70–77. doi:10.1177/


Advances in the knowledge base and treatment techniques of intra-articular hip pain have allowed surgeons to address this complex clinical problem with promising outcomes. Improvements in hip arthroscopy have led to outcomes equivalent to open surgery while utilizing significantly less invasive techniques. However, outcomes may ultimately depend on the degree of underlying osteoarthritis.

A Meta-Analysis of Joint Preservation Versus Arthroplasty for the Treatment of Displaced 3- and 4-part Fractures of the Proximal Humerus.

MM Gombera, BS Miller, RM Coale, A Bedi, JJ Gagnier.

Injury. March 2013. 44 (2013), 1532-1539.

doi: 10.1016/j.injury.2013.03.030.

In the existing literature, displaced proximal humerus fractures demonstrate improved Constant scores when treated with joint-preserving options. Age, fracture pattern, and complication rate are significant predictors of the Constant score independent of the selected treatment.

Patients' perceptions of the costs of total hip and knee arthroplasty.

JD Maratt, JJ Gagnier, MM Gombera, SE Reske, BR Hallstrom, AG Urquhart.

American Journal of Orthopedics. May, 2015; 44(5):E135-41.

There is wide variation in patients' estimates and understanding of health care costs. However, patients substantially overestimate reimbursement to the surgeon both in isolation and as a proportion of the total cost of the surgical procedure.

Patient Impressions of Reimbursement for Orthopaedic Spine Surgeons.

KL Welton, MM Gombera, JS Fischgrund, GP Graziano, RD Patel.

The Spine Journal. February 2014; doi:10.1016/j.spinee.2014.01.060.

The study aim was to understand patient impressions of reimbursement to orthopedic spine surgeons. Our findings revealed that the majority of patients significantly overestimate the amount surgeons are reimbursed per procedure. Despite this, most feel that surgeons are appropriately compensated. Additionally, many patients are unaware of the global billing period.

Have We Solved the Problem of Backside Wear in Total Knee Arthroplasty?

MM Gombera, MA Conditt, KB Mathis, PC Noble.

The Journal of Arthroplasty. February 2009. 24(2) e42.


In the first generations of modular tibial components, backside wear made a significant contribution to the particle burden released within the joint. This led to changes in design and materials to reduce micromotion and particle generation. In this retrieval study, we evaluate the efficacy of newer generations of knee implants in eliminating backside wear as a significant issue in TKR.


Hip Labral Repair and Reconstruction in Athletes.

MM Gombera, M Demirel, MA Terry.

Sports Injuries: Prevention, Diagnosis, Treatment, and Rehabilitation, 2nd Edition. New York, NY: Springer. 2015. pp 773-781

Sports Related Conditions: Syndesmotic Injuries.

AR Kadakia, MM Gombera.

Advanced Reconstruction: Foot and Ankle, 2nd Edition

Chicago, IL: AAOS/AOFAS. 2015. pp 337-348

Combined Anterior Cruciate Ligament Reconstruction and Meniscal Allograft Transplantation

MM Gombera, JK Sekiya.

Surgical Techniques of the Shoulder, Elbow, and Knee in Sports Medicine, 2nd Edition.

Philadelphia, PA: Elsevier. 2013. pp 633-641

Surgical Treatment of Combined PCL/Lateral-Sided Injuries: Acute and Chronic.

MM Gombera, JK Sekiya.

The Multiple Ligament Injured Knee: A Practical Guide to Management, 2nd Edition.

New York, NY: Springer. 2013. pp 211-226.

American Academy of Orthopaedic Surgeons The American Orthopaedic Society for Sports Medicine Arthroscopy Association of North America american shoulder and elbow society international society for hip arthroscopy