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Sir John Walsh Research Institute researcher profile

Dr Don Schwass

PositionSenior Lecturer
DepartmentDean's Office (Dentistry)
QualificationsBSc(Waikato) BDS DClinDent(Otago) FPFA
Research summaryCaries diagnosis and management, biomaterials, prosthodontics
Teaching
  • Paper co-ordinator for BDS third-year DENT 361 and DENT 364
  • Teaching into undergraduate BDS curriculum and postgraduate prosthodontics
  • Interests in diagnostic tools for clinical dentistry including CBCT, CAD-CAM, and dental simulation
Memberships
  • Member of the New Zealand Dental Association
  • Past President, Otago Branch, New Zealand Dental Association
  • Member of the New Zealand Association of Prosthodontists and Restorative Dentists
  • Member of the Academy of Australian and New Zealand Prosthodontists
  • Member of the ITI International Team for Implantology
  • Member of Faculty of Dentistry Building Project Team
  • Chair of Faculty of Dentistry Digitisation Committee
  • Chair of Faculty of Dentistry Cone Beam Computerised Tomography (CBCT) Committee
  • Member of Research Commercialisation – Strategic and Implementation Committee for Health Sciences Division
  • Consultant for ACC
  • Consultant for the Health and Disability Commissioner (HDC)
  • Consultant and examiner for the Dental Council of New Zealand, and co-ordinator of continuing education activities provided by the Faculty of Dentistry for the Dental Council of New Zealand
  • Scientific Editor of the New Zealand Dental Journal
  • Fellow of the Pierrre Fauchard Academy
Clinical
  • Specialist Prosthodontist
  • Part-time private specialist prosthodontic practice
  • Interests in prosthodontics, cariology, diagnostic tools, and operative dentistry

Research

Dr Schwass's research interests focus on the assessment and application of diagnostic tools for cariology, the management of dental caries, and the use of micro-CT (micro- computer tomography) and CBCT (cone beam computer tomography) for evaluation of mineralised tissues.

In collaboration with Dr Carla Meledandri (Chemistry, University of Otago), he has developed several methods for size-controlled synthesis of micelle-stabilised silver nanoparticles, engineered for optimal antimicrobial and optical properties, specifically designed for application on teeth to prevent, control progression, or eliminate, dental caries. In January 2013 a provisional patent application was filed pertaining to the 'assembly of micelle aggregates of surfactant micelles and silver nanopar ticles, and use as an antibacterial agent'.Working with Dr Meledandri, and with support from Otago Innovation Ltd, he is currently seeking engagement from a commercial partner to further develop this novel treatment into a marketable dental product.

Dr Schwass is enrolled in a PhD (part-time) relating to his work with silver nanoparticles, and is an advisor for several other PhD students providing technical support on micro-CT and CBCT.

He also contributes as a researcher in a randomised controlled clinical trial exploring the efficacy of resin infiltration as a means of inhibiting caries progression in children providing microscopy and technical support, collaborating with other department academic staff.

Publications

Broadbent, J. M., Cahi, A. H. J., Chong, J. B., Korduke, N. A., Lindsay, R. J., Cathro, P., & Schwass, D. R. (2021). Outcomes for teeth following pulpectomy treatment at a dental teaching hospital. New Zealand Dental Journal, 117(1), 23-30.

Loch, C., Kuan, I. B. J., Elsalem, L., Schwass, D., Brunton, P. A., & Jum'ah, A. A. (2021). COVID-19 and dental clinical practice: Students and clinical staff perceptions of health risks and educational impact. Journal of Dental Education, 85, 44-52. doi: 10.1002/jdd.12402

Jum'ah, A. A., Elsalem, L., Loch, C., Schwass, D., & Brunton, P. A. (2020). Perception of health and educational risks among dental students and educators in the era of COVID-19. European Journal of Dental Education. Advance online publication. doi: 10.1111/eje.12626

Blaschke, C., & Schwass, D. R. (2020). The socket-shield technique: A critical literature review. International Journal of Implant Dentistry, 6, 52. doi: 10.1186/s40729-020-00246-2

Porter, G. C., Schwass, D. R., Tompkins, G. R., Bobbala, S. K. R., Medlicott, N. J., & Meledandri, C. J. (2020). AgNP/Alginate Nanocomposite hydrogel for antimicrobial and antibiofilm applications. Carbohydrate Polymers, 251, 117017. doi: 10.1016/j.carbpol.2020.117017

Faulkner, R. F., Beumer, III, J., Shah, K. C., Schwass, D. R., & Wadhwani, C. (2015). Restoration of the posterior quadrants of partially edentulous patients: Examination and prosthodontic procedures. In J. Beumer, III, R. F. Faulkner, K. C. Shah & P. K. Moy (Eds.), Fundamentals of implant dentistry: Prosthodontic principles (Vol. 1). (pp. 231-283). Hanover Park, IL: Quintessence.

Chapter in Book - Research

Broadbent, J. M., Cahi, A. H. J., Chong, J. B., Korduke, N. A., Lindsay, R. J., Cathro, P., & Schwass, D. R. (2021). Outcomes for teeth following pulpectomy treatment at a dental teaching hospital. New Zealand Dental Journal, 117(1), 23-30.

Journal - Research Article

Loch, C., Kuan, I. B. J., Elsalem, L., Schwass, D., Brunton, P. A., & Jum'ah, A. A. (2021). COVID-19 and dental clinical practice: Students and clinical staff perceptions of health risks and educational impact. Journal of Dental Education, 85, 44-52. doi: 10.1002/jdd.12402

Journal - Research Article

Broadbent, J. M., Murray, C. M., Schwass, D. R., Brosnan, M., Brunton, P. A., Lyons, K. M., & Thomson, W. M. (2020). The dental amalgam phasedown in New Zealand: A 20-year trend. Operative Dentistry, 45(3), 255-264. doi: 10.2341/19-024-c

Journal - Research Article

Jum'ah, A. A., Elsalem, L., Loch, C., Schwass, D., & Brunton, P. A. (2020). Perception of health and educational risks among dental students and educators in the era of COVID-19. European Journal of Dental Education. Advance online publication. doi: 10.1111/eje.12626

Journal - Research Article

Porter, G. C., Schwass, D. R., Tompkins, G. R., Bobbala, S. K. R., Medlicott, N. J., & Meledandri, C. J. (2020). AgNP/Alginate Nanocomposite hydrogel for antimicrobial and antibiofilm applications. Carbohydrate Polymers, 251, 117017. doi: 10.1016/j.carbpol.2020.117017

Journal - Research Article

Porter, G. C., Tompkins, G. R., Schwass, D. R., Li, K. C., Waddell, J. N., & Meledandri, C. J. (2020). Anti-biofilm activity of silver nanoparticle-containing glass ionomer cements. Dental Materials, 36, 1096-1107. doi: 10.1016/j.dental.2020.05.001

Journal - Research Article

Rovaris, K., Sousa Melo, S. L., Queiroz, P. M., Loch, C., Schwass, D. R., & Haiter-Neto, F. (2019). Beam hardening correction tool improves the diagnosis of incipient caries lesions in Micro-CT images. Dentomaxillofacial Radiology, 48, 20180123. doi: 10.1259/dmfr.20180123

Journal - Research Article

Mijan, M. C., Frencken, J. E., Schwass, D. R., Chaves, S. B., & Leal, S. C. (2018). Microcomputed tomography evaluation of dentine mineral concentration in primary molars managed by three treatment protocols. Caries Research, 52(4), 303-311. doi: 10.1159/000485983

Journal - Research Article

Schwass, D. R., Lyons, K. M., Love, R., Tompkins, G. R., & Meledandri, C. J. (2018). Antimicrobial activity of a colloidal AgNP suspension demonstrated in vitro against monoculture biofilms: Toward a novel tooth disinfectant for treating dental caries. Advances in Dental Research, 29(1), 117-123. doi: 10.1177/0022034517736495

Journal - Research Article

Foster Page, L. A., Beckett, D., Ahmadi, R., Schwass, D. R., Leon de la Barra, S., Moffat, S. M., Meldrum, A., & Thomson, W. M. (2017). Resin infiltration of caries in primary molars in a community setting: 24-month randomized controlled trial findings. JDR Clinical & Translational Research, 2(3), 287-294. doi: 10.1177/2380084417699400

Journal - Research Article

Hsu, B., Lee, S., Schwass, D., & Tompkins, G. (2017). Antimicrobial activity of chemomechanical gingival retraction products. Journal of the American Dental Association, 148(7), 493-499. doi: 10.1016/j.adaj.2017.03.006

Journal - Research Article

Kabaliuk, N., Nejati, A., Loch, C., Schwass, D., Cater, J. E., & Jermy, M. C. (2017). Strategies for segmenting the upper airway in Cone-Beam Computed Tomography (CBCT) data. Open Journal of Medical Imaging, 7(4), 196-219. doi: 10.4236/ojmi.2017.74019

Journal - Research Article

Kim, K. H., Loch, C., Waddell, J. N., Tompkins, G., & Schwass, D. (2017). Surface characteristics and biofilm development on selected dental ceramic materials. International Journal of Dentistry, 2017, 7627945. doi: 10.1155/2017/7627945

Journal - Research Article

Tiu, J., Cheng, E., Hung, T.-C., Yu, C.-C., Lin, T., Schwass, D., & Al-Amleh, B. (2016). Effectiveness of crown preparation assessment software as an educational tool in simulation clinic: A pilot study. Journal of Dental Education, 80(8), 1004-1011.

Journal - Research Article

Atieh, M. A., Alsabeeha, N. H. M., Payne, A. G. T., de Silva, R. K., Schwass, D. R., & Duncan, W. J. (2014). The prognostic accuracy of resonance frequency analysis in predicting failure risk of immediately restored implants. Clinical Oral Implants Research, 25(1), 29-35. doi: 10.1111/clr.12057

Journal - Research Article

Garden, A. L., Scholz, K., Schwass, D. R., & Meledandri, C. J. (2014). Optimized colloidal chemistry for micelle-templated synthesis and assembly of silver nanocomposite materials. Colloids & Surfaces A, 441, 367-377. doi: 10.1016/j.colsurfa.2013.09.012

Journal - Research Article

Atieh, M. A., Alsabeeha, N. H. M., Duncan, W. J., de Silva, R. K., Cullinan, M. P., Schwass, D., & Payne, A. G. T. (2013). Immediate single implant restorations in mandibular molar extraction sockets: A controlled clinical trial. Clinical Oral Implants Research, 24(5), 484-496. doi: 10.1111/j.1600-0501.2011.02415.x

Journal - Research Article

Garden, A. L., van der Salm, L., Schwass, D. R., & Meledandri, C. J. (2013). Towards a tunable microemulsion method for nanoparticle synthesis. RSC Advances, 3(7), 2192-2196. doi: 10.1039/C2RA21491A

Journal - Research Article

Loch, C., Grando, L. J., Schwass, D. R., Kieser, J. A., Fordyce, R. E., & Simões-Lopes, P. C. (2013). Dental erosion in South Atlantic dolphins (Cetacea: Delphinidae): A macro and microscopic approach. Marine Mammal Science, 29(2), 338-347. doi: 10.1111/j.1748-7692.2012.00562.x

Journal - Research Article

Loch, C., Schwass, D. R., Kieser, J. A., & Fordyce, R. E. (2013). Use of micro-computed tomography for dental studies in modern and fossil odontocetes: Potential applications and limitations. NAMMCO Scientific Publications, 10. doi: 10.7557/3.2616

Journal - Research Article

Schwass, D. R., Leichter, J. W., Purton, D. G., & Swain, M. V. (2013). Evaluating the efficiency of caries removal using an Er:YAG laser driven by fluorescence feedback control. Archives of Oral Biology, 58(6), 603-610. doi: 10.1016/j.archoralbio.2012.09.017

Journal - Research Article

Schwass, D. R., Lyons, K. M., & Purton, D. G. (2013). How long will it last? The expected longevity of prosthodontic and restorative treatment. New Zealand Dental Journal, 109(3), 98-105.

Journal - Research Article

Atieh, M. A., Alsabeeha, N. H. M., Payne, A. G. T., Schwass, D. R., & Duncan, W. J. (2012). Insertion torque of immediate wide-diameter implants: A finite element analysis. Quintessence International, 43(9), e115-e126.

Journal - Research Article

Schwass, D. R., Swain, M. V., Purton, D. G., & Leichter, J. W. (2009). A system of calibrating microtomography for use in Caries Research. Caries Research, 43(4), 314-321. doi: 10.1159/000226230

Journal - Research Article

Bennani, V., Schwass, D., & Chandler, N. (2008). Gingival retraction techniques for implants versus teeth: Current status. Journal of the American Dental Association, 139(10), 1354-1363.

Journal - Research Article

Blaschke, C., & Schwass, D. R. (2020). The socket-shield technique: A critical literature review. International Journal of Implant Dentistry, 6, 52. doi: 10.1186/s40729-020-00246-2

Journal - Research Other

Schwass, D. R., & Meledandri, C. J. (2014). Enhanced penetration of silver nanocomposite assemblies into dentine using iontophoresis: Toward the treatment of dental caries [Communication]. ChemPlusChem, 79(12), 1671-1675. doi: 10.1002/cplu.201402132

Journal - Research Other

Bennani, V., Schwass, D., & Chandler, N. (2009). Gingival retraction: Author's response [Letter]. Journal of the American Dental Association, 140(2), 143-144.

Journal - Research Other

Schwass, D. (2008). Most cited: Number 2: Laser irradiation of human dental enamel and dentine [Report]. New Zealand Dental Journal, 104(3), 110-111.

Journal - Research Other

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