Innovations in Hip ArthroplastyClinical Results of a Modular Neck Hip System: Hitting the "Bull's-Eye" More Accurately

Paul J. Duwelius, MD, Mark A. Hartzband, MD, Robert Burkhart, PA, Clay Carnahan, PA, Scott Blair, BS, YingXing Wu, MD, and Gary L. Grunkemeier, PhD

Dr. Duwelius is Adjunct Associate Professor of Orthopedic Surgery, Oregon Health and Science University, Portland, Oregon, and Clinical Attending, Orthopedic and Fracture Clinic, Providence St. Vincent Medical Center, Portland, Oregon.

Dr. Hartzband is Director, Joint Replacement Service, Hackensack University Medical Center, Hackensack, New Jersey.

Mr. Burkhart and Mr. Carnahan are Physician Assistants, Orthopedic and Fracture Clinic, Providence St. Vincent Medical

Center, Portland, Oregon.

Mr. Blair is a medical student, University of Kansas Medical School, Kansas City, Kansas.

Dr. Wu is Biostatistician, and Dr. Grunkemeier is Director, Medical Data Research Center, Providence Health and Services,

Portland, Oregon.

Paul J. Duwelius, MD, Mark A. Hartzband, MD, Robert Burkhart, PA, Clay Carnahan, PA, Scott Blair, BS, YingXing Wu, MD, and Gary L. Grunkemeier, PhD

Dr. Duwelius is Adjunct Associate Professor of Orthopedic Surgery, Oregon Health and Science University, Portland, Oregon, and Clinical Attending, Orthopedic and Fracture Clinic, Providence St. Vincent Medical Center, Portland, Oregon.

Dr. Hartzband is Director, Joint Replacement Service, Hackensack University Medical Center, Hackensack, New Jersey.

Mr. Burkhart and Mr. Carnahan are Physician Assistants, Orthopedic and Fracture Clinic, Providence St. Vincent Medical

Center, Portland, Oregon.

Mr. Blair is a medical student, University of Kansas Medical School, Kansas City, Kansas.

Dr. Wu is Biostatistician, and Dr. Grunkemeier is Director, Medical Data Research Center, Providence Health and Services,

Portland, Oregon.

Paul J. Duwelius, MD, Mark A. Hartzband, MD, Robert Burkhart, PA, Clay Carnahan, PA, Scott Blair, BS, YingXing Wu, MD, and Gary L. Grunkemeier, PhD

Dr. Duwelius is Adjunct Associate Professor of Orthopedic Surgery, Oregon Health and Science University, Portland, Oregon, and Clinical Attending, Orthopedic and Fracture Clinic, Providence St. Vincent Medical Center, Portland, Oregon.

Dr. Hartzband is Director, Joint Replacement Service, Hackensack University Medical Center, Hackensack, New Jersey.

Mr. Burkhart and Mr. Carnahan are Physician Assistants, Orthopedic and Fracture Clinic, Providence St. Vincent Medical

Center, Portland, Oregon.

Mr. Blair is a medical student, University of Kansas Medical School, Kansas City, Kansas.

Dr. Wu is Biostatistician, and Dr. Grunkemeier is Director, Medical Data Research Center, Providence Health and Services,

Portland, Oregon.