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General Dentists

call for appt 319-335-9663

Choosing a dental provider is an important decision. Whether you are looking for answers to your dental problems, desiring routine dental care, or longing for a beautiful smile, your general dentist should be your partner in dental care.

Most of our general dentists are both educators and clinicians, skilled in the most current techniques and aware of the latest developments in dentistry. Their practices are conducted in a manner similar to private dental providers. If your care at the College of Dentistry involves the need for specialized treatment, your general dentist can easily refer you to a specialist here while still remaining involved in your dental care. We are the only dental school in the country with graduate programs in all specialties recognized by the American Dental Association.


Steve Armstrong Steven R. Armstrong, D.D.S., Ph.D., FADM
Professor and Chair, Department of Operative Dentistry

Dr. Armstrong joined The University of Iowa College of Dentistry faculty in 1999 after completing post-doctoral work at the college as an NIDCR Dentist-Scientist. He is a professor in the Department of Operative Dentistry.

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Dan Caplan Dan Caplan, D.D.S., Ph.D.
Department Head, Department of Preventive & Community Dentistry

Dr. Caplan is professor and head of the Department of Preventive and Community Dentistry. Before joining the UI College of Dentistry in 2007, he was a faculty member in the Department of Dental Ecology at the University of North Carolina School of Dentistry from 1995-2007.

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Christopher Barwacz Christopher Barwacz, D.D.S
Assistant Professor, Department of Prosthodontics

Dr. Barwacz joined the staff at the Dental Clinical Research Center (now the Craniofacial Clinical Research Center) in 2008, where he provides the latest in dental care to research participants as well as private patients.

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Deborah Cobb Deborah R. Cobb, D.D.S., M.S.
Associate Professor, Department of Operative Dentistry

Dr. Deborah Cobb joined the College of Dentistry in 1986. She is an associate professor and graduate program director in the Department of Operative Dentistry.

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Howard J. Cowen Howard J. Cowen, D.D.S., M.S., DABSCD
Clinical Professor, Department of Preventive & Community Dentistry

Dr. Cowen joined the College of Dentistry in 1982. He is director of the Geriatric and Special Needs Dental Program and director of the Geriatric and Special Needs Postgraduate Certificate Program, as well as a clinical professor in the Department of Preventive and Community Dentistry

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Peter Damiano Peter Damiano, D.D.S., M.P.H.
Professor, Department of Preventive and Community Dentistry
Director, UI Public Policy Center

Dr. Damiano joined the College of Dentistry in 1990. He is a professor in the Department of Preventive and Community Dentistry and director, Health Policy Research, at the Public Policy Center.

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Gerald Denehy Gerald E. Denehy, D.D.S., M.S.
Dr. Bob H. and Jerilee H. Williams Professor in Restorative Dentistry

Dr. Denehy joined the College of Dentistry in 1968. He is the Dr. Bob H. and Jerilee H. Williams Professor in Restorative Dentistry and a professor in the Department of Operative Dentistry.

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Mark A. Dittmer Mark A. Dittmer, D.D.S.
Clinical Assistant Professor, Family Dentistry

Dr. Dittmer joined the College of Dentistry in 1998 as a clinical assistant professor. He works as a general dentist in the faculty general practice at the UI College of Dentistry & Dental Clinics.

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Ronald D. Elvers Ronald D. Elvers, D.D.S., M.S.
Director of Clinics
Associate Clinical Professor, Department of Oral Pathology, Radiology & Medicine

Dr. Elvers joined The University of Iowa College of Dentistry in 1996. He is director of clinics and an associate clinical professor in the Department of Oral Pathology, Radiology and Medicine.

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Alberto Gasparoni Alberto Gasparoni, D.D.S, M.S., Ph.D., D.D.S.
Clinical Associate Professor

Dr. Gasparoni joined the College of Dentistry in 2010 as a visiting assistant professor. He is now a clinical associate professor in Dental Clinic Administration and the Department of Oral Pathology, Radiology and Medicine.

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Sandra Guzmán-Armstrong Sandra Guzmán-Armstrong, D.D.S., M.S.
Clinical Associate Professor, Department of Operative Dentistry

Dr. Guzmán-Armstrong joined The University of Iowa College of Dentistry faculty in 2001 after completing postdoctoral work at the college. She is a clinical associate professor in the Department of Operative Dentistry.

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Jennifer Hartshorn Jennifer Hartshorn, D.D.S., Geriatric and Special Needs Certificate
Clinical Assistant Professor, Department of Preventive & Community Dentistry

Dr. Jennifer Hartshorn joined the Department of Preventive & Community Dentistry as a clinical assistant professor in July 2013 after completing her geriatric and special needs certificate at the UI College of Dentistry.

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Maria Marcela Hernández Maria Marcela Hernández, D.D.S., M.S.
Clinical Associate Professor, Department of Family Dentistry

Dr. Hernández joined the University of Iowa College of Dentistry faculty in 2003 after working as director of the operative dentistry section at the Universidad Javeriana Dental School, Bogota, Colombia, and working in private practice for ten years. She is a clinical associate professor in the Department of Family Dentistry.

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Mary Kay Hill Mary Kay Hill, D.D.S.
Visiting Assistant Professor, Dental Clinic Administration

Dr. Hill was a general dentist in Medford, Oregon, before joining the University of Iowa College of Dentistry in 2012. She is a visiting assistant professor in Dental Clinic Administration.

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Ryan W. Hill Ryan W. Hill, D.D.S., General Practice Residency Certificate
Clinical Assistant Professor, Department of Oral and Maxillofacial Surgery

Dr. Hill received his D.D.S. from the College of Dentistry in 2010 and completed a one-year general practice residency at the University of Iowa Hospitals and Clinics. Dr. Hill worked as a general dentist in Oregon treating underserved populations and then accepted the position of assistant professor and program director of the general practice residency in the Department of Oral and Maxillofacial Surgery in July 2012.

To Make an Appointment: 319-335-2201
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Justine Kolker Justine L. Kolker, D.D.S., M.S., Ph.D.
Associate Professor, Department of Operative Dentistry

Dr. Kolker joined The University of Iowa College of Dentistry faculty in 2005 after completing a research fellowship at the University of Michigan and a Ph.D. in oral science at Iowa as an NIDCR Dentist-Scientist. She is an assistant professor in the Department of Operative Dentistry.

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So Ran Kwon So Ran Kwon, D.D.S., M.S., Ph.D., M.S.
Associate Professor, Department of Operative Dentistry

Before joining the UI College of Dentistry as an associate professor in the Department of Operative Dentistry in 2013, Dr. Kwon was an associate professor in the Department of Restorative Dentistry at Loma Linda University School of Dentistry from 2011-2013.

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Leonardo Marchini Leonardo Marchini, D.D.S., M.S.D., Ph.D.
Assistant Professor, Department of Preventive & Community Dentistry

Dr. Marchini joined the College of Dentistry in 2013. Prior to coming to Iowa, Dr. Marchini taught as an assistant professor at the University of Vale de Paraiba, the University of Taubate, and the State University of Sao Paulo, for both undergraduate and graduate students.

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Carrie McKnight Carrie McKnight, D.D.S.
Clinical Assistant Professor, Department of Oral Pathology, Radiology and Medicine

Dr. McKnight served as a staff dentist at Broadlawns Hospital, Des Moines, from 1999-2001. She also was in private practice in Johnston, Iowa, from 2000-2001. From 2001-2005, she was clinical assistant professor and General Practice Residency director in the Hospital Dentistry division of UI Hospitals and Clinics.

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Michelle R. McQuistan Michelle R. McQuistan, D.D.S., M.S.
Associate Professor, Department of Preventive & Community Dentistry

Dr. McQuistan completed her D.D.S. at The University of Iowa in 2001. In 2002 she received her AEGD certificate from the University of Florida-Jacksonville Clinic. She returned to The University of Iowa where she completed her M.S. in dental public health in 2004.

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Patricia Meredith Patricia Meredith, D.D.S., M.S.
Clinical Associate Professor, Department of Operative Dentistry

Dr. Meredith joined The University of Iowa College of Dentistry faculty in 1996 as director of Patient Admissions. She is a clinical associate professor in the Department of Operative Dentistry.

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Michael D. Murrell Michael D. Murrell, D.D.S.
Clinical Assistant Professor, Department of Family Dentistry

Dr. Murrell was in private practice from 1982-2014. He was also an adjunct faculty in the University of Iowa College of Dentistry's Department of Family Dentistry from 2013-2014. Dr. Murrell is now a clinical assistant professor in the Department of Family Dentistry.

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Niels Oestervemb Niels Oestervemb, D.D.S., M.S.C.
Assistant Professor

Dr. Oestervemb joined the University of Iowa College of Dentistry in July 2012. He is an assistant professor in Clinic Administration.

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Natalia Restrepo-Kennedy Natalia Restrepo-Kennedy, D.D.S., M.S.
Clinical Assistant Professor, Department of Operative Dentistry

Dr. Restrepo-Kennedy joined The University of Iowa College of Dentistry faculty in 2012 as a visiting assistant professor in the Department of Operative Dentistry. In 2013 she became a clinical assistant professor.
 

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Rodrigo Rocha Maia Rodrigo Rocha Maia, D.D.S., M.S., Ph.D
Assistant Professor, Department of Operative Dentistry

Dr. Rocha Maia joined the University of Iowa College of Dentistry faculty in 2012 as a visiting assistant professor in the Department of Operative Dentistry. In 2013 he became an assistant professor.

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Ruth D. Spieker Ruth D. Spieker, D.D.S., M.S.
Assistant Professor, Department of Oral Pathology, Radiology and Medicine

Dr. Spieker was in private practice from 1984-2002 and was also an adjunct faculty member at the University of Western Ontario. In 2002 she joined The University of Iowa College of Dentistry as an assistant professor in the Department of Oral Pathology, Radiology & Medicine.

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Keri Collison Stahle Keri Collison Stahle, D.D.S.
Clinical Assistant Professor

Dr. Stahle joined the College of Dentistry in 2007. She is a clinical assistant professor.

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Cheryl Straub-Morarend Cheryl Straub-Morarend, D.D.S.
Assistant Professor, Department of Family Dentistry

Dr. Straub-Morarend joined The University of Iowa College of Dentistry in 2005. She is a visiting assistant professor in the Department of Family Dentistry.

To Make an Appointment: 319-335-7318
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Sherry Timmons Sherry Timmons, D.D.S., Ph.D.
Assistant Professor, Department of Oral Pathology, Radiology and Medicine

Dr. Timmons became a faculty member in the Department of Oral Pathology, Radiology & Medicine in 2002 following completion of a Ph.D. in oral science from Iowa in 2001 and a general practice residency in 2002.

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Marcos Vargas Marcos Vargas, B.D.B., D.D.S., M.S.
Professor, Department of Family Dentistry

Dr. Vargas joined the College of Dentistry as an assistant professor in 1994. He is now a professor in the Department of Family Dentistry.

To Make an Appointment: 319-335-7318
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