The Department of Periodontology is actively engaged in clinical and translational research that truly focuses upon the UAB School of Dentistry’s core values: excellence, patient-centered, innovation, and unity of purpose. We aim to conduct research that meets the highest standards in a state-of-the-art facility to provide benefits to our patients and to expand the knowledge base in periodontology. Our research interests include periodontal-systemic connection, innovative regenerative technologies, dental implant innovations, epigenetics, and the periodontal microbiome.

Active Studies

  • A dental implant registry of treatment outcomes of implant therapy by practitioners in the National Dental Practice Based Research Network (UG3 DE030090).
  • Association between maxillary sinus characteristics and graft volumetric stability 12 months after lateral window sinus augmentation: A retrospective study.
  • A prospective, randomized clinical trial to compare side incision access mucosal incision (SAMRI) and sulcular tunnel access (STA) root coverage procedures with coronally advanced flap and acellular dermal matrix (ADM) to treat teeth with gingival recession and lack of adequate keratinized tissue.
  • Growth factor availability and release kinetics in Platelet Rich Fibrin versus rh-PDGF with and without bone substitutes: An in vitro analysis.
  • The effect of maxillary sinus anatomical variations, surgical considerations, and patient factors on volumetric changes following lateral wall sinus floor elevation technique for up to 8 years.
  • Gain of Keratinized Mucosa Around Teeth and Dental Implants Using a combination of Strip Gingival Graft and Acellular Dermal Matrix. 
  • Lateral Ridge Augmentation Using allograft bone particles hydrated with or without Recombinant Human Platelet-Derived Growth factor: A clinical and Histological Randomized Controlled Trial.
  • A Randomized, Double-Blind, Active-Control, Single-Center Safety and Efficacy Study of a Novel Dental Gel (LDG) as an Adjunct to Scaling and Root Planing (SRP) in Subjects with Stage II and III Periodontitis.

Department Publications 2019-2022

Peer-Reviewed Articles

  1. Geisinger ML, Alexander DC, Mitchell SC, Dragan IF. Dental Team’s Role in Maternal and Child Oral Health During and After Pregnancy. Comp Cont Edu Dent 2019;40(2): 90-96.
  2. El Hajj FA, Abou-Arraj RV, Reddy MS, Majzoub Z. Changes in Keratinized Tissue Width Following Connective Tissue Grafts and Diode Laser- versus Blade Gingivoplasty. Int J Periodontics Restorative Dent 2019;39(2):279-288.
  3. Randall EF, Abou-Arraj RV, Geurs NC, Griffin R, Reddy M, Geisinger M. The effect of dental implant collar design on crestal bone loss at 1 year after implant placement. Int J Periodontics Restorative Dent 2019;39(2):165-173.
  4. Geisinger ML, Kaur M, Basma H. Nonsurgical periodontal therapy: A review of current standards of care and innovations to improve gingival and periodontal health. Curr Oral Health Rep 2019; 6: 177-187.
  5. Geisinger ML, Ogdon D, Kaur M, Valiquette G, Geurs NC, Reddy MS. Toss the Floss? Evidence based oral hygiene recommendations for the periodontal patient in the age of "Flossgate". Clin Adv Periodontics 2019 Jun;9(2):83-90.
  6. El Hajj FA, Abou-Arraj RV, Reddy MS, Majzoub ZA. Changes in Keratinized Tissue Width Following Connective Tissue Grafts and Diode Laser- vs Blade-Gingivoplasty. Int J Periodontics Restorative Dent. 2019 Mar/Apr;39(2):279-288.
  7. McKenzie CT, Tilashalski K, Abou-Arraj R, Peterson DT, White ML. Students' Evaluations of Simulations in Dentistry: A Multiple Cohort Study at a U.S. Dental School. J Dent Educ. 2019; 83(10): 1142-1150.
  8. Clagett R, Ogdon D, Kim M, Geisinger ML. Treatment of recession defects with mucosal access and use of soft tissue allograft: A case report of a simplified protocol. Clin Adv Periodontol 2020; 10(1): 30-37.
  9. Geisinger ML, David DC, Dragan IF. “Un-expected”: Managing oral health in a complicated pregnancy. Compend Cont Dent Educ 2020; 41(5): 272-277.
  10. Kumar PS, Geisinger ML, DeLong HR, Lipman RD, Araujo MWB. Living under a cloud. Electronic cigarettes and the dental patient. J Am Dent Assoc 2020; 151(3): 155-158.
  11. Abou-Arraj RV, Pizzini A, Nasseh P, Basma H. 2020. Soft Tissue Management Around Implants: Why, When, and How? Curr Oral Health Rep 2020; 7: 381-396.
  12. Estrich C, Mikkelsen M, Morrissey R, Geisinger ML, Ioannidou E, Vujicic M, Araujo MWB. Estimating COVID-19 prevalence and infection control practices among US Dentists. J Am Dent Assoc 2020; 151(11): 815-824. *Selected as the Cover Feature **Most cited article in the Journal of the American Dental Association in 2020.
  13. Kumar PS, Geisinger ML, Avila-Ortiz G. Methods to mitigate infection spread from aerosol-generating dental procedures. J Periodontol. 2021; 92(6): 784-792.
  14. Geisinger ML, Iaonnidou E. Up in the Air? Future Research Strategies to Assess Aerosols in Dentistry. JDR Clin Trans Res. 2021; 6(2): 128-131.
  15. Basma HS, Abou-Arraj RV. Management of a Large Artery During Maxillary Sinus Bone Grafting: A Case Report. Clin Adv Periodontics. 2021; 11(1): 22-26.
  16. Abou-Arraj RV, Kaur M, Alkhoury S, Swain TA, Geurs NC, Souccar NM. The new periodontal disease classification: Level of agreement on diagnoses and treatment planning at various dental education levels. J Dent Educ. 2021; 85(10): 1627-1639.
  17. Pizzini A, Basma HS, Li P, Geurs NC, Abou-Arraj RV. The impact of anatomic, patient and surgical factors on membrane perforation during lateral wall sinus floor elevation. Clin Oral Implants Res. 2021; 32(3): 274-284.
  18. Kaur M, Geurs NC, Cobb CM, Otomo-Corgel J, Takesh T, Lee JH, Lam TM, Lin K, Nguyen A, Nguyen BL, Wilder-Smith P. Evaluating efficacy of a novel dentifrice in reducing probing depths in Stage I and II periodontitis maintenance patients: A randomized, double-blind, positive controlled clinical trial. J Periodontol. 2021; 92(9): 1286-1294.
  19. Misch CM, Basma H, Misch-Haring MA, Wang H-L. An updated decision tree for vertical bone augumentation. Int J Periodont Res Dent 2021; 41(1): 11-21.
  20. Araujo MWB, Estrich CG, Mikkelsen M, Morrissey R, Harrison B, Geisinger ML, Ioannidou E, Vujicic M. COVID-2019 among dentists in the United States: A 6-month longitudinal report of accumulative prevalence and incidence. J Am Dent Assoc. 2021; 152(6):425-433. Erratum in: J Am Dent Assoc. 2021 **Selected as the Clinical Research Paper of the Year in Dentistry 2021 by Dr. Bicuspid (Cuspie Award)
  21. Basma HS, Misch CM. Extraction socket grafting and ridge augmentation failures association with clindamycin antibiotic therapy: A retrospective study. Int J Oral Maxillofac Impl 2021; 36(1): 122-125.
  22. Geisinger ML, Nasseh P, Galviz G, Jo KY, Pikos AM. Adjunctive Use of Platelet Concentrates for Hard- and Soft-Tissue Grafting. Compend Contin Educ Dent. 2021 May;42(5):212-217.
  23. Solanki C, Geisinger ML, Luepke PG, Al-Bitar K, Palomo L, Lee W, Blanchard S, Shin D, Maupome G, Eckert GJ, John V. Assessing readiness to manage medical emergencies among dental students at four dental schools. J Dent Educ. 2021; 85(9): 1462-1470.
  24. Kaur M, Abou-Arraj RV, Lin CP, Geisinger ML, Geurs NC. A 5-Year Retrospective Analysis of Biologic and Prosthetic Complications Associated With Single-Tooth Endosseous Dental Implants: Practical Applications. Clin Adv Periodontics. 2021 Dec;11(4):225-232.
  25. Geisinger ML, Calvert Grosso K, Kaur M, Abou-Arraj RV, Basma H, Ogdon D, Geurs NC. Clinical Decision Making for Primary Peri-Implantitis Prevention: Practical Applications. Clin Adv Periodontics. 2021 Mar;11(1):43-53.
  26. Basma H, Saleh I, Abou-Arraj R, Li P, Benavides E, Wang HL, Chang HL. Association between lateral wall thickness and sinus membrane perforation during lateral sinus elevation: A retrospective study. Int J Oral Implantol (Berl). 2021; 14(1):77-85.
  27. Basma HS, Geurs NC, Geisinger ML. Choosing the Ideal Implant-Supported Prosthesis for an Edentulous Maxilla: Three Key Prosthetic Parameters. Compend Contin Educ Dent. 2022; 43(3): 148-153.
  28. Neumeier TT, Reddy M, Geurs N, Hill J, Neumeier H. Longitudinal Study of Dental Implants in HIV-Positive Patients. J Prosthodont. 2022; 31(2): 115-120.
  29. Souccar NM, Oueis R, Mussleman JP, Geurs NC, Abou Arraj RV. The Impact of Orthodontic Retainers on Gingival Recession: A Best-Evidence Review. Compend Contin Educ Dent. 2022; 43(3): 126.


  1. Geisinger ML, Dragan IF, Alexander DC. 2019. Oral Health and Pregnancy: An interprofessional educational model. ADEE/ADEA Shaping the Future of Dental Education III.
  2. Villalobos S, Kaur M, Geisinger ML, Javed A. Effect of antidepressants on inflammatory markers in gingival tissue and serum samples in patients with chronic periodontitis. Southern Academy of Periodontology Annual Meeting, 2019. (2nd Place Award, Basic Science Research, Billy M. Penne Award).
  3. Geisinger ML, Martin KM, Alison JP, Kaur M, Geurs NC. Waistline to gumline: body mass index in treated periodontitis patients. American Association of Dental Research/International Association of Dental Research, Oral Presentation, 2020.
  4. Robinson M, Geurs NC, Geisinger ML. Anyone’s Game: Gamification as a Resident Self-Study Tool. American Dental Education Association, Poster Presentation, 2020.
  5. DeSouza G, Tiwari T, Shaddox L, Letra A, Miguez P, Geisinger M, Ioannidou E. Factors affecting productivity of US researchers during the COVID-19 pandemic. International Association of Dental Research Poster Presentation, 2021.
  6. Liu K, Abou Arraj RV, Geisinger ML, Geurs NC, Javed A, Kaur M, Basma HS. A randomized controlled trial to compare the histomorphometric and clinical outcomes of soft tissue augmentation at the time of lateral ridge augmentation procedures. Southern Academy of Periodontology Annual Meeting 2021 (1st Place Clinical Science Research, Billy M. Pennel Award)
  7. Nasseh P, Englert B, Lawson N, Li P, Liu PR, Geurs NC, Abou-Arraj RV. The Effects of Implantoplasty On Implant Design Characteristics and Mechanical Strength. Academy of Osseointegration Annual Meeting 2022 (Finalist, Oral Scientific Research)
  8. Geisinger ML, Howard JH, Abou Arraj RV, Kaur M, Basma H, Geurs NC. A prospective, randomized controlled trial to compare vestibular incisions subperiosteal access and sulcular tunnel access root coverage procedures to treat gingival recession. EuroPerio 10. Copenhagen 2022.