Donald Nixdorf, DDS, MS

Professor
Donald Nixdorf, DDS, MS

Contact

Office Address

6-354 Moos Tower
515 Delaware St. SE
Minneapolis, MN 55455
United States

Affiliations:
Department of Diagnostic and Biological Sciences,
Division of TMD and Orofacial Pain

Titles

Director, Division of TMD and Orofacial Pain
Professor

Education

MS, University of Minnesota
Major: Clinical Research

MS, The Ohio State University

DDS, University of Alberta

BS, University of Alberta

Residency, The Ohio State University
Major: General Practice Residency in Hospital Dentistry

Fellowships

Visiting Research Fellow, FMRIB Laboratory, University of Oxford
Teaching Fellow, Orofacial Pain, University of Alberta
Clinical Fellow, Dental Anesthesiology, Johns Hopkins University

Expand all

Biography

Dr. Nixdorf is a Professor and Director of the Division of TMD & Orofacial Pain. His clinical and teaching interests include the diagnosis and management of chronic TMD pain, headaches and neuropathic pain. His research is focused on the topic of persistent non-odontogenic “tooth” pain, looking at issues related to classification (e.g., consensus building), diagnosis (e.g., development of criteria, imaging, screening questionnaires), epidemiology, (e.g., determining predictive factors, assessing of impact), exploration of mechanisms (e.g., sensory testing, functional imaging), and treatment options.

Research Summary

Dr. Nixdorf’s teaching interests align with his clinical interests, namely the diagnosis and management of chronic ororfacial pains. Specifically he lectures on the differential diagnosis of orofacial pains, classification of orofacial pain, and treatment approaches to orofacial pain management.

Clinical Summary

Dr. Nixdorf’s clinical interests include the diagnosis and management of chronic ororfacial pains. This includes TMD pain and jaw dysfunction; neuropathic orofacial pains, such as trigeminal neuralgia and deafferentation pain (a.k.a atypical odontalgia); Headache management, including tension-type, migraine, paroxysmal hemicrania, cluster and other autonomic cephalalgias.

Publications

Daline, I. H., Nixdorf, D. R., Law, A. S., Pileggi, R., 2020. 3-year Outcome of Patients with Persistent Pain after Root Canal Treatment: The National Dental Practice-Based Research Network.. Journal of endodontics, doi: https://doi.org/10.1016/j.joen.2020.01.018 PubMed ID: 32171563.

Sharma, S., Breckons, M., Brönnimann Lambelet, B., Chung, J. W., List, T., Lobbezoo, F., Nixdorf, D. R., Oyarzo, J. F., Peck, C., Tsukiyama, Y., Ohrbach, R., 2020. Challenges in the clinical implementation of a biopsychosocial model for assessment and management of orofacial pain.. Journal of oral rehabilitation, 47 (1): 87-100. doi: https://doi.org/10.1111/joor.12871 PubMed ID: 31398261.

Herrero Babiloni, A., Nixdorf, D. R., Moana-Filho, E. J., 2019. Persistent dentoalveolar pain disorder: A putative intraoral chronic overlapping pain condition. Oral diseases,doi: https://doi.org/10.1111/odi.13248 PubMed ID: 31797486.

Sude, A., Nixdorf, D. R., Grande, A. W., 2019. Human papillomavirus-positive oropharyngeal squamous cell carcinoma manifesting as glossopharyngeal neuralgia.. Journal of the American Dental Association (1939), 150 (12): 1059-1061. doi: https://doi.org/10.1016/j.adaj.2019.10.004 PubMed ID: 31761020.

Schuurmans, T. J., Nixdorf, D. R., Idiyatullin, D. S., Law, A. S., Barsness, B. D., Roach, S. H., Gaalaas, L., 2019. Accuracy and Reliability of Root Crack and Fracture Detection in Teeth Using Magnetic Resonance Imaging.. Journal of endodontics, 45 (6): 750-755.e2. doi: https://doi.org/10.1016/j.joen.2019.03.008 PubMed ID: 31056300.

Durham, J., Stone, S. J., Robinson, L. J., Ohrbach, R., Nixdorf, D. R., 2019. Development and preliminary evaluation of a new screening instrument for atypical odontalgia and persistent dentoalveolar pain disorder.. International endodontic journal, 52 (3): 279-287. doi: https://doi.org/10.1111/iej.13017 PubMed ID: 30229950.

Hryvenko, I., Cervantes-Chavarría, A. R., Law, A. S., Nixdorf, D. R., 2018. Hemicrania continua: Case series presenting in an orofacial pain clinic.. Cephalalgia : an international journal of headache, 38 (13): 1950-1959. doi: https://doi.org/10.1177/0333102418764895 PubMed ID: 29562746.

Herrero Babiloni, A., Guay, S., Nixdorf, D. R., de Beaumont, L., Lavigne, G., 2018. Non-invasive brain stimulation in chronic orofacial pain: a systematic review.. Journal of pain research, 11 1445-1457. doi: https://doi.org/10.2147/JPR.S168705 PubMed ID: 30122975.

Demirturk Kocasarac, H., Geha, H., Gaalaas, L. R., Nixdorf, D. R., 2018. MRI for Dental Applications.. Dental clinics of North America, 62 (3): 467-480. doi: https://doi.org/10.1016/j.cden.2018.03.006 PubMed ID: 29903562.

Devine, M., Hirani, M., Durham, J., Nixdorf, D. R., Renton, T., 2018. Identifying criteria for diagnosis of post-traumatic pain and altered sensation of the maxillary and mandibular branches of the trigeminal nerve: a systematic review.. Oral surgery, oral medicine, oral pathology and oral radiology, 125 (6): 526-540. doi: https://doi.org/10.1016/j.oooo.2017.12.020 PubMed ID: 29426749.

Moana-Filho, E. J., Alonso, A. A., Kapos, F. P., Leon-Salazar, V., Durand, S. H., Hodges, J. S., Nixdorf, D. R., 2017. Multifactorial assessment of measurement errors affecting intraoral quantitative sensory testing reliability.. Scandinavian journal of pain, 16 93-98. doi: https://doi.org/10.1016/j.sjpain.2017.03.007 PubMed ID: 28850419.

Chavarria ARC, Nixdorf, D. R., 2017. The Patient You Will Never Forget: PDAP.. Northwest dentistry, 96 (2): 11-12. PubMed ID: 30549759.

Al-Musawi, M., Durham, J., Whitworth, J. M., Stone, S. J., Nixdorf, D. R., Valentine, R. A., 2017. Effect of topical neuromodulatory medications on oral and skin keratinocytes.. Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology, 46 (2): 134-141. doi: https://doi.org/10.1111/jop.12437 PubMed ID: 26991677.

Herrero Babiloni, A., Nixdorf, D. R., Law, A. S., Moana-Filho, E. J., Shueb, S. S., Nguyen, R. H., Durham, J., 2017. Initial accuracy assessment of the modified S-LANSS for the detection of neuropathic orofacial pain conditions.. Quintessence international (Berlin, Germany : 1985), 48 (5): 419-429. doi: https://doi.org/10.3290/j.qi.a37382 PubMed ID: 27981266.

Fonseca Alonso, B., Nixdorf, D. R., Shueb, S. S., John, M. T., Law, A. S., Durham, J., 2017. Examining the Sensitivity and Specificity of 2 Screening Instruments: Odontogenic or Temporomandibular Disorder Pain?. Journal of endodontics, 43 (1): 36-45. doi: https://doi.org/10.1016/j.joen.2016.10.001 PubMed ID: 27986100.

Durham, J., Al-Baghdadi, M., Baad-Hansen, L., Breckons, M., Goulet, J. P., Lobbezoo, F., List, T., Michelotti, A., Nixdorf, D. R., Peck, C. C., Raphael, K., Schiffman, E., Steele, J. G., Story, W., Ohrbach, R., 2016. Self-management programmes in temporomandibular disorders: results from an international Delphi process.. Journal of oral rehabilitation, 43 (12): 929-936. doi: https://doi.org/10.1111/joor.12448 PubMed ID: 27727477.

Sun, Y., Brauckmann, O., Nixdorf, D. R., Kentgens, A., Garwood, M., Idiyatullin, D., Heerschap, A., 2016. Imaging human teeth by phosphorus magnetic resonance with nuclear Overhauser enhancement.. Scientific reports, 6 30756. doi: https://doi.org/10.1038/srep30756 PubMed ID: 27498919.

Shueb, S. S., Boyer, H. C., Nixdorf, D. R., 2016. Nonodontogenic "tooth pain" of nose and sinus origin.. Journal of the American Dental Association (1939), 147 (6): 457-9. doi: https://doi.org/10.1016/j.adaj.2015.11.013 PubMed ID: 26762708.

Pigg, M., Nixdorf, D. R., Nguyen, R. H., Law, A. S., 2016. Validity of Preoperative Clinical Findings to Identify Dental Pulp Status: A National Dental Practice-Based Research Network Study.. Journal of endodontics, 42 (6): 935-42. doi: https://doi.org/10.1016/j.joen.2016.03.016 PubMed ID: 27118600.

Herrero Babiloni, A., Kapos, F. P., Nixdorf, D. R., 2016. Intraoral administration of botulinum toxin for trigeminal neuropathic pain.. Oral surgery, oral medicine, oral pathology and oral radiology, 121 (6): e148-53. doi: https://doi.org/10.1016/j.oooo.2016.03.013 PubMed ID: 27181448.

Idiyatullin, D., Garwood, M., Gaalaas, L., Nixdorf, D. R., 2016. Role of MRI for detecting micro cracks in teeth.. Dento maxillo facial radiology, 45 (7): 20160150. doi: https://doi.org/10.1259/dmfr.20160150 PubMed ID: 27402200.

Nixdorf, D. R., Law, A. S., Lindquist, K., Reams, G. J., Cole, E., Kanter, K., Nguyen, R. H., Harris, D. R., 2016. Frequency, impact, and predictors of persistent pain after root canal treatment: a national dental PBRN study.. Pain, 157 (1): 159-65. doi: https://doi.org/10.1097/j.pain.0000000000000343 PubMed ID: 26335907.

Moana-Filho, E. J., Bereiter, D. A., Nixdorf, D. R., 2015. Amplified Brain Processing of Dentoalveolar Pressure Stimulus in Persistent Dentoalveolar Pain Disorder Patients.. Journal of oral & facial pain and headache, 29 (4): 349-62. doi: https://doi.org/10.11607/ofph.1463 PubMed ID: 26485382.

Shueb, S. S., Nixdorf, D. R., John, M. T., Alonso, B. F., Durham, J., 2015. What is the impact of acute and chronic orofacial pain on quality of life?. Journal of dentistry, 43 (10): 1203-10. doi: https://doi.org/10.1016/j.jdent.2015.06.001 PubMed ID: 26073033.

Nixdorf, D. R., Law, A. S., John, M. T., Sobieh, R. M., Kohli, R., Nguyen, R. H., 2015. Differential Diagnoses for Persistent Pain Following Root Canal Treatment: A Study in the National Dental PBRN.. Northwest dentistry, 94 (4): 33-40. PubMed ID: 26433993.

Nixdorf, D. R., Law, A. S., John, M. T., Sobieh, R. M., Kohli, R., Nguyen, R. H., 2015. Differential diagnoses for persistent pain after root canal treatment: a study in the National Dental Practice-based Research Network.. Journal of endodontics, 41 (4): 457-63. doi: https://doi.org/10.1016/j.joen.2014.12.012 PubMed ID: 25732400.

Law, A. S., Nixdorf, D. R., Aguirre, A. M., Reams, G. J., Tortomasi, A. J., Manne, B. D., Harris, D. R., 2015. Predicting severe pain after root canal therapy in the National Dental PBRN.. Journal of dental research, 94 (3 Suppl): 37S-43S. doi: https://doi.org/10.1177/0022034514555144 PubMed ID: 25355775.

Durham, J., Touger-Decker, R., Nixdorf, D. R., Rigassio-Radler, D., Moynihan, P., 2015. Oro-facial pain and nutrition: a forgotten relationship?. Journal of oral rehabilitation, 42 (1): 75-80. doi: https://doi.org/10.1111/joor.12226 PubMed ID: 25201161.

Durham, J., Nixdorf, D. R., 2014. Healthcare pathway and biopsychosocial impact of persistent dentoalveolar pain disorder: a qualitative study.. International endodontic journal, 47 (12): 1151-9. doi: https://doi.org/10.1111/iej.12263 PubMed ID: 24697333.

Law, A. S., Nixdorf, D. R., Rabinowitz, I., Reams, G. J., Smith, Jr, J. A., Torres, A. V., Harris, D. R., 2014. Root canal therapy reduces multiple dimensions of pain: a national dental practice-based research network study.. Journal of endodontics, 40 (11): 1738-45. doi: https://doi.org/10.1016/j.joen.2014.07.011 PubMed ID: 25190605.

Edwards, J. P., Peterson, E. J., Durham, J., Nixdorf, D. R., 2014. Methotrexate pharmacotherapy for implant-related temporomandibular joint pain: a case report.. Oral surgery, oral medicine, oral pathology and oral radiology, 118 (2): e44-7. doi: https://doi.org/10.1016/j.oooo.2014.05.008 PubMed ID: 25047933.

Idiyatullin, D., Corum, C. A., Nixdorf, D. R., Garwood, M., 2014. Intraoral approach for imaging teeth using the transverse B1 field components of an occlusally oriented loop coil.. Magnetic resonance in medicine, 72 (1): 160-5. doi: https://doi.org/10.1002/mrm.24893 PubMed ID: 23900995.

Schiffman, E., Ohrbach, R., Truelove, E., Look, J., Anderson, G., Goulet, J. P., List, T., Svensson, P., Gonzalez, Y., Lobbezoo, F., Michelotti, A., Brooks, S. L., Ceusters, W., Drangsholt, M., Ettlin, D., Gaul, C., Goldberg, L. J., Haythornthwaite, J. A., Hollender, L., Jensen, R., John, M. T., De Laat, A., de Leeuw, R., Maixner, W., van der Meulen, M., Murray, G. M., Nixdorf, D. R., Palla, S., Petersson, A., Pionchon, P., Smith, B., Visscher, C. M., Zakrzewska, J., Dworkin, S. F., 2014. Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) for Clinical and Research Applications: recommendations of the International RDC/TMD Consortium Network* and Orofacial Pain Special Interest Group†.. Journal of oral & facial pain and headache, 28 (1): 6-27. doi: https://doi.org/10.11607/jop.1151 PubMed ID: 24482784.

Durham, J., Exley, C., John, M. T., Nixdorf, D. R., 2013. Persistent dentoalveolar pain: the patient's experience.. Journal of orofacial pain, 27 (1): 6-13. doi: https://doi.org/10.11607/jop.1022 PubMed ID: 23424715.

Schierz, O., Nixdorf, D. R., Singer, S., Reissmann, D. R., 2012. Self-reported ability to concentrate in patients with painful temporomandibular disorders compared to the general population.. Community dentistry and oral epidemiology, 40 (6): 507-15. doi: https://doi.org/10.1111/j.1600-0528.2012.00692.x PubMed ID: 22494031.

Nixdorf, D. R., Law, A. S., Look, J. O., Rindal, D. B., Durand, E. U., Kang, W., Agee, B. S., Fellows, J. L., Gordan, V. V., Gilbert, G. H., 2012. Large-scale clinical endodontic research in the National Dental Practice-Based Research Network: study overview and methods.. Journal of endodontics, 38 (11): 1470-8. doi: https://doi.org/10.1016/j.joen.2012.08.002 PubMed ID: 23063220.

Nixdorf, D. R., Drangsholt, M. T., Ettlin, D. A., Gaul, C., De Leeuw, R., Svensson, P., Zakrzewska, J. M., De Laat, A., Ceusters, W., 2012. Classifying orofacial pains: a new proposal of taxonomy based on ontology.. Journal of oral rehabilitation, 39 (3): 161-9. doi: https://doi.org/10.1111/j.1365-2842.2011.02247.x PubMed ID: 21848527.

Nixdorf, D. R., Sobieh, R., Gierthmühlen, J., 2012. Using an n-of-1 trial to assist in clinical decision making for patients with orofacial pain.. Journal of the American Dental Association (1939), 143 (3): 259-61. doi: https://doi.org/10.14219/jada.archive.2012.0150 PubMed ID: 22383206.

Nixdorf, D. R., 2011. BTX-A for persistent myofascial TMD pain: interpreting a small clinical trial with negative results.. Pain, 152 (9): 1944-5. doi: https://doi.org/10.1016/j.pain.2011.05.020 PubMed ID: 21641114.

Idiyatullin, D., Corum, C., Moeller, S., Prasad, H. S., Garwood, M., Nixdorf, D. R., 2011. Dental magnetic resonance imaging: making the invisible visible.. Journal of endodontics, 37 (6): 745-52. doi: https://doi.org/10.1016/j.joen.2011.02.022 PubMed ID: 21787482.

Anderson, G. C., John, M. T., Ohrbach, R., Nixdorf, D. R., Schiffman, E. L., Truelove, E. S., List, T., 2011. Influence of headache frequency on clinical signs and symptoms of TMD in subjects with temple headache and TMD pain.. Pain, 152 (4): 765-71. doi: https://doi.org/10.1016/j.pain.2010.11.007 PubMed ID: 21196079.

Kobayashi, N., Idiyatullin, D., Corum, C., Moeller, S., Chamberlain, R., O'Connell, R., Nixdorf, D. R., Garwood, M., 2011. Detecting Fleeting MRI Signals with Frequency-Modulated Pulses.. AIP conference proceedings, 1330 23-26. doi: https://doi.org/10.1063/1.3562224 PubMed ID: 22661791.

Moana-Filho, E. J., Nixdorf, D. R., Bereiter, D. A., John, M. T., Harel, N., 2010. Evaluation of a magnetic resonance-compatible dentoalveolar tactile stimulus device.. BMC neuroscience, 11 142. doi: https://doi.org/10.1186/1471-2202-11-142 PubMed ID: 21029454.

Leppik, I. E., Goel, V., Rarick, J., Nixdorf, D. R., Cloyd, J. C., 2010. Intramuscular and intravenous levetiracetam in humans: safety and pharmacokinetics.. Epilepsy research, 91 (2-3): 289-92. doi: https://doi.org/10.1016/j.eplepsyres.2010.07.016 PubMed ID: 20708904.

Nixdorf, D. R., Moana-Filho, E. J., Law, A. S., McGuire, L. A., Hodges, J. S., John, M. T., 2010. Frequency of nonodontogenic pain after endodontic therapy: a systematic review and meta-analysis.. Journal of endodontics, 36 (9): 1494-8. doi: https://doi.org/10.1016/j.joen.2010.06.020 PubMed ID: 20728716.

Fricton, J. R., Ouyang, W., Nixdorf, D. R., Schiffman, E. L., Velly, A. M., Look, J. O., 2010. Critical appraisal of methods used in randomized controlled trials of treatments for temporomandibular disorders.. Journal of orofacial pain, 24 (2): 139-51. PubMed ID: 20401352.

Bereiter, D. A., Okamoto, K., Tashiro, A., Nixdorf, D. R., 2010. A comment on experimental occlusal interference induces long-term masticatory muscle hyperalgesia in rats by Cao et al.. Pain, 148 (3): 519; author reply 519-20. doi: https://doi.org/10.1016/j.pain.2010.01.003 PubMed ID: 20116926.

Nixdorf, D. R., Moana-Filho, E. J., Law, A. S., McGuire, L. A., Hodges, J. S., John, M. T., 2010. Frequency of persistent tooth pain after root canal therapy: a systematic review and meta-analysis.. Journal of endodontics, 36 (2): 224-30. doi: https://doi.org/10.1016/j.joen.2009.11.007 PubMed ID: 20113779.

Law, A. S., Durand, E. U., Rindal, D. B., Nixdorf, D. R., 2010. "Doctor, why does my tooth still hurt"?. Northwest dentistry, 89 (1): 33-6. PubMed ID: 20344958.

Nixdorf, D. R., John, M. T., Wall, M. M., Fricton, J. R., Schiffman, E. L., 2010. Psychometric properties of the modified Symptom Severity Index (SSI).. Journal of oral rehabilitation, 37 (1): 11-20. doi: https://doi.org/10.1111/j.1365-2842.2009.02017.x PubMed ID: 19889036.

Nixdorf, D. R., John, M. T., Schierz, O., Bereiter, D. A., Hellekant, G., 2009. Self-reported severity of taste disturbances correlates with dysfunctional grade of TMD pain.. Journal of oral rehabilitation, 36 (11): 792-800. doi: https://doi.org/10.1111/j.1365-2842.2009.01996.x PubMed ID: 19747196.

Nixdorf, D. R., Hemmaty, A., Look, J. O., Schiffman, E. L., John, M. T., 2009. Electric toothbrush application is a reliable and valid test for differentiating temporomandibular disorders pain patients from controls.. BMC musculoskeletal disorders, 10 94. doi: https://doi.org/10.1186/1471-2474-10-94 PubMed ID: 19643013.

Nixdorf, D. R., Velly, A. M., Alonso, A. A., 2008. Neurovascular pains: implications of migraine for the oral and maxillofacial surgeon.. Oral and maxillofacial surgery clinics of North America, 20 (2): 221-35, vi-vii. doi: https://doi.org/10.1016/j.coms.2007.12.008 PubMed ID: 18343327.

Alonso, A. A., Nixdorf, D. R., 2006. Case series of four different headache types presenting as tooth pain.. Journal of endodontics, 32 (11): 1110-3. doi: https://doi.org/10.1016/j.joen.2006.02.033 PubMed ID: 17055919.

Nixdorf, D. R., Peters, E., Lung, K. E., 2003. Clinical presentation and differential diagnosis of nasolabial cyst.. Journal (Canadian Dental Association), 69 (3): 146-9. PubMed ID: 12622877.

Nixdorf, D. R., Heo, G., Major, P. W., 2002. Randomized controlled trial of botulinum toxin A for chronic myogenous orofacial pain.. Pain, 99 (3): 465-73. doi: https://doi.org/10.1016/s0304-3959(02)00240-3 PubMed ID: 12406522.

Grants and Patents

Award: Telerehabilitation Effectiveness in Individuals with Tempromandibular Disorders
Sponsoring Organization: AMERICAN ACADEMY OF ORALFACIAL PAIN
Award Dates: 2021 - 2022

Award: Diagnostic Accuracy of MRI to Detect Vertical Root Fractures in Extracted Endodontically Treated Teeth
Sponsoring Organization: AMERICAN ACADEMY OF ORALFACIAL PAIN
Award Dates: 2019 - 2021

Award: Management of Painful Temporomandibular Disorders(TMD)-TMD Residents Participation
Principal Investigator: Schiffman, Eric L
Sponsoring Organization: THE UNIVERSITY OF ALABAMA AT BIRMINGHAM
Award Dates: 2017 - 2019

Award: Diagnosis of TMD within Endodontic Patients receiving RCT
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: PARK DENTAL FOUNDATION
Award Dates: 2016 - 2019

Award: Dental MRI: Reliability Assessment of Detecting Cracks in Teeth
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: AMER ASSOC OF ENDODONTISTS FDN
Award Dates: 2015 - 2019

Award: The National Dental PBRN (Assessing the Management of TMJD Pain Patients in the Network)
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: THE UNIVERSITY OF ALABAMA AT BIRMINGHAM
Award Dates: 2015 - 2019

Award: The National Dental PBRN (Assessing the Management of TMJD Pain Patients in the Network)
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: THE UNIVERSITY OF ALABAMA AT BIRMINGHAM
Award Dates: 2014 - 2019

Award: The National Dental PBRN (Assessing the Management of TMJD Pain Patients in the Network)
Principal Investigator: Schiffman, Eric L
Sponsoring Organization: THE UNIVERSITY OF ALABAMA
Award Dates: 2014 - 2019

Award: National Dental Practice-Based Research Network
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: HEALTHPARTNERS INSTITUTE
Award Dates: 2014 - 2019

Award: NMR IMAGING AND SPECTROSCOPY
Principal Investigator: Ugurbil, Kamil
Sponsoring Organization: NIH Nat'l Center for Research Resources
Award Dates: 2011 - 2013

Award: Understanding the impacts of, and screening for, atypical odontalgia (AO)
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: AMERICAN ACADEMY OF ORALFACIAL PAIN
Award Dates: 2011 - 2013

Award: Diagnoses for persistent dentoalveolar pain following root canal therapy: A nested case-control study
Sponsoring Organization: AMER ASSOC OF ENDODONTISTS FDN
Award Dates: 2010 - 2012

Award: Clinical Taste Assessment - Cross-sectional Evaluation
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: AMERICAN ACADEMY OF ORALFACIAL PAIN
Award Dates: 2009 - 2010

Award: Peri-Operative Pain and Root Canal Therapy
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: THE UNIVERSITY OF ALABAMA AT BIRMINGHAM
Award Dates: 2009 - 2012

Award: Persistent Pain and Root Canal Therapy
Principal Investigator: Nixdorf, Donald R
Sponsoring Organization: THE UNIVERSITY OF ALABAMA AT BIRMINGHAM
Award Dates: 2009 - 2010