Contact Details
- Phone
- 64 3 479 5471
- geoffrey.tompkins@otago.ac.nz
- Position
- Honorary Associate Professor
- Department
- Department of Oral Sciences
- Qualifications
- BSc PhD PGDipSci (Otago)
- Research summary
- Dental molecular microbiology
Research
As a microbiologist employed in the Faculty of Dentistry, Associate Professor Tompkins' research focused on dental microbiology. Much of his research involved providing microbiological support in collaborative studies with clinicians undertaking applied research, because most of our postgraduate students are involved in clinical (or translational) research (and do not have the background and training for more fundamental microbiology research). As such, Associate Professor Tompkins' research platform was highly varied, having been involved in dental forensics, endodontic, implant, restorative and proprietary (AgResearch) research.
His work on bite mark analysis (forensics) is recognised internationally to the point that he has twice been invited to contribute to what is currently regarded as the definitive publication in the field; the significance of his bite mark research was acknowledged in The Lancet (2006). A more recent publication describing a convenient and rapid method to quantify bacterial survival in dentinal tubules following endodontic treatment promises a significant technical advance in the field.
Publications
Horsnell, A., Farella, M., Tompkins, G., & Jansen van Vuuren, W.-A. (2025). Comparison of biofilm accumulation on conventional and CAD/CAM orthodontic band alloys (in vivo) and subsequent enamel demineralization (ex vivo). Journal of Biomedical Materials Research Part B, 113, e35573. doi: 10.1002/jbm.b.35573 Journal - Research Article
Choudhury, M., Brunton, P., Dias, G., Schwass, D., Meledandri, C., Ratnayake, J., Pletzer, D., & Tompkins, G. (2024). Gold nanoparticles as innovative therapeutics for oral mucositis: A review of current evidence. Drug Delivery & Translational Research. Advance online publication. doi: 10.1007/s13346-024-01748-x Journal - Research Other
Krishnan, C. S., Li, K. C., Tompkins, G. R., Lyons, K. M., & Cannon, R. D. (2024). Effects of simulated long-term exposure to bottled, neutral pH electrolyzed oxidizing water on the properties of denture base resins. Journal of Prosthetic Dentistry. Advance online publication. doi: 10.1016/j.prosdent.2024.03.034 Journal - Research Article
Choudhury, M., Brunton, P., Schwass, D., Pletzer, D., Ratnayake, J., Dias, G., & Tompkins, G. (2024). Effectiveness of gold nanoparticles in prevention and treatment of oral mucositis in animal models: A systematic review. Systematic Reviews, 13(1), 39. doi: 10.1186/s13643-023-02425-9 Journal - Research Other
Krishnan, C. S., Tompkins, G. R., Lyons, K. M., & Cannon, R. D. (2023). Electrolysed oxidising water as a multi-purpose biocide in dental healthcare: A scoping review. Gerodontology, 40, 422-462. doi: 10.1111/ger.12712 Journal - Research Other
2025
Journal - Research Article
Horsnell, A., Farella, M., Tompkins, G., & Jansen van Vuuren, W.-A. (2025). Comparison of biofilm accumulation on conventional and CAD/CAM orthodontic band alloys (in vivo) and subsequent enamel demineralization (ex vivo). Journal of Biomedical Materials Research Part B, 113, e35573. doi: 10.1002/jbm.b.35573
2024
Journal - Research Article
Krishnan, C. S., Li, K. C., Tompkins, G. R., Lyons, K. M., & Cannon, R. D. (2024). Effects of simulated long-term exposure to bottled, neutral pH electrolyzed oxidizing water on the properties of denture base resins. Journal of Prosthetic Dentistry. Advance online publication. doi: 10.1016/j.prosdent.2024.03.034
Journal - Research Other
Choudhury, M., Brunton, P., Dias, G., Schwass, D., Meledandri, C., Ratnayake, J., Pletzer, D., & Tompkins, G. (2024). Gold nanoparticles as innovative therapeutics for oral mucositis: A review of current evidence. Drug Delivery & Translational Research. Advance online publication. doi: 10.1007/s13346-024-01748-x
Choudhury, M., Brunton, P., Schwass, D., Pletzer, D., Ratnayake, J., Dias, G., & Tompkins, G. (2024). Effectiveness of gold nanoparticles in prevention and treatment of oral mucositis in animal models: A systematic review. Systematic Reviews, 13(1), 39. doi: 10.1186/s13643-023-02425-9
2023
Journal - Research Article
Krishnan, C. S., Lyons, K. M., Tompkins, G. R., & Cannon, R. D. (2023). Storage-related stability and antimicrobial efficacy of bottled, neutral-pH Electrolysed Oxidising Water. Journal of Dentistry, 137, 104656. doi: 10.1016/j.jdent.2023.104656
Zhao, R., Wang, T., Yang, R., Adam, L. A., Zaharic, T., Loch, C., Tompkins, G. R., & Cooper, P. R. (2023). Enhancing the student learning experience: Co-teaching biochemistry and clinical sciences within the dental curriculum. Biochemistry & Molecular Biology Education, 51, 146-154. doi: 10.1002/bmb.21701
Journal - Research Other
Krishnan, C. S., Tompkins, G. R., Lyons, K. M., & Cannon, R. D. (2023). Electrolysed oxidising water as a multi-purpose biocide in dental healthcare: A scoping review. Gerodontology, 40, 422-462. doi: 10.1111/ger.12712
2022
Journal - Research Article
Salem, A. S., Tompkins, G. R., & Cathro, P. R. (2022). Alkaline tolerance and biofilm formation of root canal isolates of Enterococcus faecalis: An in vitro study. Journal of Endodontics, 48(4), 542-547.e4. doi: 10.1016/j.joen.2022.01.006
Conference Contribution - Published proceedings: Abstract
Heng, N., Stanton, J.-A., & Tompkins, G. (2022). The genetic basis of bacteriocin STH2 resistance in Streptococcus mitis I18. New Zealand Dental Journal, 118(4), (pp. 176). [Abstract]
Adam, L., Zhao, R., Wang, T., Yang, R., Zaharic, T., Loch, C., Tompkins, G., & Cooper, P. (2022). Linking theory to practice: Co-teaching biochemistry in dental education. New Zealand Dental Journal, 118(4), (pp. 172). [Abstract]
Krishnan, C., Li, K. C., Lyons, K., Lamping, E., Tompkins, G., & Cannon, R. (2022). Evaluating the suitability of Electrolysed Oxidising Water as a denture disinfectant. New Zealand Dental Journal, 118(4), (pp. 169). [Abstract]
Choudhury, M., Tompkins, G., Brunton, P., Dias, G., Pletzer, D., & Ratnayake, J. (2022). Gold nanoparticles against oropharyngeal pathogens in cancer therapy. New Zealand Dental Journal, 118(4), (pp. 168). [Abstract]
Krishnan, C. S., Li, K. C., Lyons, K. M., Tompkins, G. R., & Cannon, R. D. (2022). Evaluating the suitability of electrolysed oxidising water as a denture disinfectant. In L. Wilson, H. Harcombe, P. Jayakaran, L. Burga, J. Antony, K. Morgaine, M. Garelja, A. Middleton, M. Anwar & T. Milne (Eds.), Proceedings of the 263rd Otago Medical School Research Society (OMSRS) Meeting: PhD Student Speaker Awards. Dunedin, New Zealand: OMSRS. Retrieved from https://ourarchive.otago.ac.nz/handle/10523/12839
2021
Journal - Research Article
Porter, G. C., Safii, S. H., Medlicott, N. J., Duncan, W. J., Tompkins, G. R., & Coates, D. E. (2021). Formulation of a semisolid emulsion containing Leptospermum scoparium essential oil and evaluation of in vitro antimicrobial and antibiofilm efficacy. Planta Medica, 87, 253-266. doi: 10.1055/a-1330-8765
Journal - Research Other
Allen, L. L., Heng, N. C. K., & Tompkins, G. R. (2021). Streptococcus salivarius isolates of varying acid tolerance exhibit F1F0-ATPase conservation [Brief report]. Caries Research, 55, 288-291. doi: 10.1159/000516175
2020
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
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
Perry, S. E., Huckabee, M.-L., Tompkins, G., & Milne, T. (2020). The association between oral bacteria, the cough reflex and pneumonia in patients with acute stroke and suspected dysphagia. Journal of Oral Rehabilitation, 47, 386-394. doi: 10.1111/joor.12903
2019
Conference Contribution - Published proceedings: Abstract
Heng, N. C. K., Stanton, J.-A. L., Treece, J., Dufour, M., & Tompkins, G. R. (2019). Characterisation of bacteriocin resistance development by Streptococcus mitis strain I18. Proceedings of the New Zealand Microbiological Society (NZMS) Annual Conference. 606. Retrieved from https://www.nzmscoference.org.nz
Cotton, G., Schwass, D., Tompkins, G., & Meledandri, C. (2019). Anti-biofilm silver nanoparticle containing glass ionomer cements. Journal of Dental Research, 98(A), 2514. Retrieved from https://iadr.abstractarchives.com
Allen, L., Heng, N., & Tompkins, G. (2019). Streptococcus salivarius isolates of varying acid tolerance display F1F0-ATPase conservation. Journal of Dental Research, 98(A), 0830. Retrieved from https://iadr.abstractarchives.com
Heng, N., & Tompkins, G. (2019). Characterization of bacteriocin resistance exhibited by Streptococcus mitis. Journal of Dental Research, 98(A), 1412. Retrieved from https://iadr.abstractarchives.com
Heng, N., Dufour, M., Stanton, J. A., Treece, J., & Tompkins, G. (2019). Characterisation of bacteriocin resistance exhibited by Streptococcus australis strain I18. New Zealand Dental Journal, 115, (pp. 161). [Abstract]
Chellappa, D., Cathro, P., & Tompkins, G. (2019). Endodontic application of an anti-cancer metallo-drug. International Endodontic Journal, 52(Suppl. 1), (pp. 21-22). doi: 10.1111/iej.13172
2018
Journal - Research Article
Chew, M., Tompkins, G., Tawse-Smith, A., Waddell, N., & Ma, S. (2018). Reusing titanium healing abutments: Comparison of two decontamination methods. International Journal of Prosthodontics, 31(6), 613-618. doi: 10.11607/ijp.5881
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
Conference Contribution - Published proceedings: Full paper
Duncan, W., Loch Santos da Silva, C., Cotton, G., Sharma, A., Tompkins, G., Schwass, D., & Meledandri, C. (2018). Development of a novel animal model for testing antimicrobial agents against periodontitis and peri-implantitis. In P. M. Bartold & Y. Ku (Eds.), Contemporary concepts in periodontology & implant dentistry. (pp. 77-95). Adelaide, Australia: Asian Pacific Society of Periodontology. [Full Paper]
Conference Contribution - Published proceedings: Abstract
Allen, L. L., Heng, N. C. K., & Tompkins, G. R. (2018). Streptococcus salivarius isolates of varying acid tolerance exhibit F1F0-ATPase conservation. Proceedings of the New Zealand Microbiological Society (NZMS) & New Zealand Society for Biochemistry and Molecular Biology (NZSBMB) Joint Annual Conference: Microbes & Molecules. (pp. 90). Retrieved from https://www.nzmsconference.org.nz
Drummond, B., Kashchuk, V. Y., Boyd, D., & Tompkins, G. (2018). Effect of chewing manuka honey tablets on oral health. Journal of Dental Research, 97(Spec. Iss. B), 0809. Retrieved from http://www.iadr.org
Chen, W. T., Chen, Y. E., Cheong, D., Adam, L., Tompkins, G., & Cannon, R. (2018). Comparing the microbiology syllabi between the world's top dental schools. Journal of Dental Research, 97(Spec. Iss. B), 1530. Retrieved from http://www.iadr.org
Low, A., Antoun, J., Tompkins, G., Mei, L., & Farella, M. (2018). Development of an in vivo model to investigate the effects of different adhesive removal methods around the orthodontic brackets. New Zealand Dental Journal, 114(4), (pp. 191). [Abstract]
Bryant, J., Tompkins, G., Tawse-Smith, A., Waddell, J. N., & Ma, S. (2018). Comparison of using sodium hypochlorite with different immersion duration for decontaminating used implant healing abutments. New Zealand Dental Journal, 114(4), (pp. 190-191). [Abstract]
Meledandri, C. J., Cotton, G. C., Schwass, D. R., & Tompkins, G. R. (2018). Silver nanoparticles as an antibacterial agent for dental treatment [Invited]. Proceedings of the New Zealand Microbiological Society (NZMS) New Zealand Society for Biochemistry and Molecular Biology (NZSBMB) Joint Annual Conference: Microbes & Molecules. (pp. 31-32). Retrieved from https://www.nzmsconference.org.nz
2017
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
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
Safii, S. H., Tompkins, G. R., & Duncan, W. J. (2017). Periodontal application of Manuka honey: Antimicrobial and demineralising effects In Vitro. International Journal of Dentistry, 2017, 9874535. doi: 10.1155/2017/9874535
Conference Contribution - Published proceedings: Abstract
Kashchuk, V., Boyd, D., Tompkins, G. R., & Drummond, B. K. (2017). Effect of a chewable manuka honey tablet with xylitol, on oral health including dental plaque activity and gingival health in young adults. New Zealand Dental Journal, 113(4), (pp. 59-60). [Abstract]
Duncan, W., Loch Santos da Silva, C., Cotton, G., Tompkins, G., Schwass, D., & Meledandri, C. (2017). Development of a novel animal model for testing antimicrobial agents against periodontitis and peri-implantitis. New Zealand Dental Journal, 113(4), (pp. 58-59). [Abstract]
Conference Contribution - Verbal presentation and other Conference outputs
Tompkins, G. (2017, September). Sterilisation and infection control. Verbal presentation at the New Zealand Institute of Dental Technologists (NZIDT) Conference, Dunedin, New Zealand.
2016
Journal - Research Article
Tawse-Smith, A., Atieh, M. A., Tompkins, G., Duncan, W. J., Reid, M. R., & Stirling, C. H. (2016). The effect of piezoelectric ultrasonic instrumentation on titanium discs: A microscopy and trace elemental analysis in vitro study. International Journal of Dental Hygiene, 14(3), 191-201. doi: 10.1111/idh.12142
Conference Contribution - Published proceedings: Abstract
Cotton, G. C., Schwass, D. R., Duncan, W. J., Tompkins, G. R., & Meledandri, C. J. (2016). Synthesis of an antimicrobial mucoadhesive silver nanoparticle hydrogel for periodontal treatment. Proceedings of the Diagnostics, Drugs, Devices, Discovery (D4) Conference. Retrieved from http://www.otago.ac.nz/d4/index.html
Heng, N., Benn, C., Upritchard, J., Hale, J., Ross, J., Tompkins, G., Kieser, J., & Stanton, J.-A. (2016). Streptococcus kieseri sp. nov. from the New Zealand brushtail possum. Journal of Dental Research, 95(Spec Iss B), 1163. Retrieved from http://www.iadr.org/
Cotton, G. C., Schwass, D. R., Tompkins, G. R., Duncan, W. J., & Meledandri, C. J. (2016). Silver nanoparticle-based hydrogel for treatment of periodontal disease. Proceedings of the Sir John Walsh Research Institute Research Symposium. (pp. 15). Retrieved from http://www.otago.ac.nz/sjwri/news/otago621026
Heng, N. C. K., Benn, C., Hale, J. D. F., Ross, J. G., Tompkins, G. R., Kieser, J. A., & Stanton, J.-A. L. (2016). Streptococcus kieseri sp. nov. from the New Zealand brushtail possum. Proceedings of the Sir John Walsh Research Institute Research Symposium. (pp. 15). Retrieved from http://www.otago.ac.nz/sjwri/news/otago621026
Dawson, J., Tompkins, G., Leichter, J., & Tawse-Smith, A. (2016). Implant surface decontamination: An ex vivo study investigating the effects of diode laser irradiation on implant surface biofilm. Proceedings of the Sir John Walsh Research Institute Research Symposium. (pp. 14-15). Retrieved from http://www.otago.ac.nz/sjwri/news/otago621026
Safii, S., Duncan, W., Tompkins, G., & Medlicott, N. (2016). Effect of medical-grade manuka honey on dental plaque-associated bacteria and hydroxyapatite beads in vitro. Proceedings of the Sir John Walsh Research Institute Research Symposium. (pp. 13-14). Retrieved from http://www.otago.ac.nz/sjwri/news/otago621026
Conference Contribution - Verbal presentation and other Conference outputs
Heng, N. C. K., Benn, C., Upritchard, J. E., Hale, J. D. F., Ross, J. G., Tompkins, G. R., Kieser, J. A., & Stanton, J.-A. L. (2016, November). Streptococcus kierseri sp. nov. from the New Zealand brushtail possum. Verbal presentation at the Joint Meeting of the New Zealand Microbiological Society (NZMS) and the New Zealand Society for Biochemistry and Molecular Biology (NZSBMB), Christchurch, New Zealand.
2015
Journal - Research Other
Pardesi, B., & Tompkins, G. R. (2015). Colony polymerase chain reaction of heme-accumulating bacteria [Note]. Anaerobe, 32, 49-50. doi: 10.1016/j.anaerobe.2014.11.013
Conference Contribution - Published proceedings: Abstract
Meledandri, C. J., Schwass, D. R., Tompkins, G. R., Lyons, K., & Love, R. M. (2015). Preventing biofilm formation by exposure of oral bacteria to silver nanoparticles. Journal of Dental Research, 94(Spec Iss B), 2287533. Retrieved from http://www.iadr.org/
Safii, S. H., Tompkins, G. R., Duncan, W., English, H. K., & Schmidlin, P. R. (2015). Antimicrobial effect of medical-grade manuka honey against oral bacteria in vitro. Journal of Dental Research, 94(Spec Iss B), 2335386. Retrieved from http://www.iadr.org/
Cotton, G. C., Meledandri, C. J., Schwass, D. R., & Tompkins, G. R. (2015). Antimicrobial activity of silver nanocomposite against oral micro-organisms. Journal of Dental Research, 94(Spec Iss B), 2344089. Retrieved from http://www.iadr.org/
Cotton, G. C., Meledandri, C. J., Schwass, D. R., & Tompkins, G. (2015). Topical antibacterial gel for treatment of periodontal disease. Dental Materials, 31(Suppl. 1), (pp. e39). doi: 10.1016/j.dental.2015.08.087
2014
Journal - Research Article
Wong, S., Mundy, L., Chandler, N., Upritchard, J., Purton, D., & Tompkins, G. (2014). Antibacterial properties of root canal lubricants: A comparison with commonly used irrigants. Australian Endodontic Journal, 40, 111-115. doi: 10.1111/aej.12075
Tawse-Smith, A., Khosa, A., Kamel, M. S., Duncan, W. J., Swain, M., & Tompkins, G. (2014). Bacterial colonization of titanium discs: A pilot study for evaluating implant surface deterioration. Brazilian Journal of Periodontology, 24(1), 14-23.
Conference Contribution - Published proceedings: Abstract
Hwang, L., Bennani, V., Tawse-Smith, A., Cannon, R. D., & Tompkins, G. R. (2014). Effect of air-polishing on titanium surfaces, biofilm removal and biocompatibility. Journal of Dental Research, 93(Spec Iss C). Retrieved from http://www.iadr.org
Davies, S., Huckabee, M.-L., Fink, J., & Tompkins, G. (2014). Examining factors which may reduce the incidence of aspiration pneumonia in patients with acute stroke and dysphagia. New Zealand Dental Journal, 110(1), (pp. 25-26). [Abstract]
Conference Contribution - Poster Presentation (not in published proceedings)
Hwang, L., Bennani, V., Tawse-Smith, A., Cannon, R., Tompkins, G., & Dias, G. (2014, July). Effect of air-polishing treatment on titanium surfaces: An in vitro study. Poster session presented at the Sir John Walsh Research Institute Research Day, Dunedin, New Zealand.
Hwang, L., Bennani, V., Tawse-Smith, A., Cannon, R., Tompkins, G., & Dias, G. (2014, May). Effect of air-polishing treatment on titanium surfaces: An in vitro study. Poster session presented at the International Association for Dental Research (IADR) New Zealand Section Student Poster Competition, Dunedin, New Zealand.
2013
Journal - Research Article
Russell, A. A., Chandler, N. P., Hauman, C., Siddiqui, A. Y., & Tompkins, G. R. (2013). The butterfly effect: An investigation of sectioned roots. Journal of Endodontics, 39(2), 208-210. doi: 10.1016/j.joen.2012.09.016
Conference Contribution - Verbal presentation and other Conference outputs
Davies, S., Huckabee, M.-L., Fink, J., & Tompkins, G. (2013, October). Examining factors which may reduce the incidence of aspiration pneumonia in patients with acute stroke and dysphagia. Verbal presentation at the 9th Biomouth Conference, Dunedin, New Zealand.
2012
Journal - Research Article
Peters, N., Tawse Smith, A., Leichter, J., & Tompkins, G. (2012). Laser therapy: The future of peri-implantitis management. Brazilian Journal of Periodontology, 222(1), 26-33.
Kennedy, D. M., Stanton, J.-A. L., García, J. A., Mason, C., Rand, C. J., Kieser, J. A., & Tompkins, G. R. (2012). Microbial analysis of bite marks by sequence comparison of streptococcal DNA. PLoS ONE, 7(12), e51757. doi: 10.1371/journal.pone.0051757
Matejka, K. M., Bremer, P. J., Tompkins, G. R., & Brooks, H. J. L. (2012). Antibiotic susceptibility of Moraxella catarrhalis biofilms in a continuous flow model. Diagnostic Microbiology & Infectious Disease, 74, 394-398. doi: 10.1016/j.diagmicrobio.2012.08.021
Aziz, A., Chandler, N. P., Hauman, C. H. J., Leichter, J. W., McNaughton, A., & Tompkins, G. R. (2012). Infection of apical dentin and root-end cavity disinfection. Journal of Endodontics, 38(10), 1387-1390. doi: 10.1016/j.joen.2012.06.034
Hsu, L., Power, D., Upritchard, J., Burton, J., Friedlander, R., Horswell, J., … Kieser, J., & Tompkins, G. (2012). Amplification of oral streptococcal DNA from human incisors and bite marks. Current Microbiology, 65(2), 207-211. doi: 10.1007/s00284-012-0148-x
Conference Contribution - Published proceedings: Abstract
Upritchard, J., Place, J., & Tompkins, G. (2012). Effect of antiseptic mouthwash on retention of oral streptococcal strains. Journal of Dental Research, 91(Spec Iss C), 169880. Retrieved from http://www.dentalresearch.org
Benn, C., Kieser, J. A., Upritchard, J., Tompkins, G., Ross, J., & Heng, N. (2012). Identifying individual possums using their oral bacteria. Journal of Dental Research, 91(Spec Iss C), 169857. Retrieved from http://www.dentalresearch.org
2011
Chapter in Book - Research
Tompkins, G. R. (2011). Genotypic comparison of bacterial DNA recovered from bitemarks and teeth. In R. B. J. Dorion (Ed.), Bitemark evidence: A color atlas and text. (2nd ed.) Boca Raton, FL: CRC Press.
Journal - Research Article
Parmar, D., Hauman, C. H. J., Leichter, J. W., McNaughton, A., & Tompkins, G. R. (2011). Bacterial localization and viability assessment in human ex vivo dentinal tubules by fluorescence confocal laser scanning microscopy. International Endodontic Journal, 44(7), 644-651. doi: 10.1111/j.1365-2591.2011.01867.x
Conference Contribution - Published proceedings: Abstract
Chandler, N. P., Mundy, L., Purton, D. G., & Tompkins, G. R. (2011). Antibacterial effect of root canal lubricants. International Endodontic Journal, 44(12), (pp. 1185-1186). doi: 10.1111/j.1365-2591.2011.01914.x
Siddiqui, A. Y., Hauman, C. H. J., Chandler, N. P., & Tompkins, G. R. (2011). Influence of patient age on bacterial invasion, distribution, and viability in root dentine. International Endodontic Journal, 44(12), (pp. 1185). doi: 10.1111/j.1365-2591.2011.01914.x
Russell, A., Chandler, N. P., Hauman, C. H. J., Siddiqui, A., & Tompkins, G. R. (2011). The 'butterfly' optical effect: A SEM investigation. International Endodontic Journal, 44(12), (pp. 1179). doi: 10.1111/j.1365-2591.2011.01914.x
Hauman, C. H. J., Russell, A., Chandler, N. P., Siddiqui, A., & Tompkins, G. R. (2011). Effect of age on the density of dentinal tubules at three levels of tooth roots. International Endodontic Journal, 44(12), (pp. 1179). doi: 10.1111/j.1365-2591.2011.01914.x
Rodricks, R. I. B., Mackie, T. A., & Tompkins, G. R. (2011). Porphyromonas gingivalis and Prevotella intermedia responses to reactive oxygen species. Journal of Dental Research, 90(Spec Iss A), 2754. Retrieved from http://www.dentalresearch.org
2010
Chapter in Book - Research
Aziz, A., Parmar, D., McNaughton, A., & Tompkins, G. R. (2010). Bacterial viability determination in a dentinal tubule infection model by confocal laser scanning microscopy. In G. J. Seymour, M. P. Cullinan & N. C. K. Heng (Eds.), Oral Biology. (pp. 141-150). New York: Springer. doi: 10.1007/978-1-60761-820-1_10
Journal - Research Article
Power, D. A., Cordiner, S. J., Kieser, J. A., Tompkins, G. R., & Horswell, J. (2010). PCR-based detection of salivary bacteria as a marker of expirated blood. Science & Justice, 50(2), 59-63. doi: 10.1016/j.scijus.2009.04.006
Conference Contribution - Published proceedings: Abstract
Siddiqui, A., Hauman, T., Chandler, N., Tompkins, G., & Duncan, W. (2010). Dentine tubule infection: Detection and distribution in root canals of different age. Proceedings of the Faculty of Dentistry 3M Research Day. Retrieved from http://dentistry.otago.ac.nz/research/index.html
2009
Conference Contribution - Published proceedings: Abstract
Hauman, C. H. J., Aziz, A., Tompkins, G. R., Chandler, N. P., & Leichter, J. W. (2009). Root-end cavity disinfection with chlorhexidine and laser. International Endodontic Journal. 42(12), (pp. 1149-1150). doi: 10.1111/j.1365-2591.2009.01618.x
Aziz, A., Hauman, C. H. J., Tompkins, G. R., & Chandler, N. P. (2009). Infection at the root apex: A confocal microscope study of bacterial viability. International Endodontic Journal. 42(12), (pp. 1150). doi: 10.1111/j.1365-2591.2009.01618.x
2008
Conference Contribution - Published proceedings: Abstract
Hsu, L. T.-T., Power, D. A., Burton, J. P., Hauman, J. H., Tagg, J. R., & Tompkins, G. R. (2008). Comparison of streptococcal DNA amplified from bite marks and teeth. Journal of Dental Research, 87(Spec Iss B), 3416. Retrieved from http://www.dentalresearch.org
Conference Contribution - Poster Presentation (not in published proceedings)
Kennedy, D., Stanton, J.-A., Kieser, J., & Tompkins, G. (2008, October). Microbial analysis of bite marks by sequence comparison of streptococcal 16S ribosomal DNA. Poster session presented at the 19th International Symposium on the Forensic Sciences, Melbourne, Australia.
2007
Journal - Research Article
Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2007). Competence-dependent bacteriocin production by Streptococcus gordonii DL1 (Challis). Journal of Bacteriology, 189(4), 1468-1472.
Conference Contribution - Published proceedings: Abstract
Hsu, L. T.-T., Power, D. A., Burton, J. P., Hauman, J. H., Tagg, J., & Tompkins, G. R. (2007). Comparison of streptococcal DNA amplified from bite marks and teeth. Journal of Dental Research, 86(Spec Iss B). Retrieved from http://www.dentalresearch.org
Mackie, T. A., Holborow, D. W., & Tompkins, G. R. (2007). Porphyromonas gingivalis and Prevotella intermedia response to reactive oxygen species. Journal of Dental Research, 86(Spec Iss B). Retrieved from http://www.dentalresearch.org
Hsu, L., Power, D. A., Burton, J. P., Hauman, J. H., Tagg, J. R., & Tompkins, G. R. (2007). Comparison of streptococcal DNA amplified from human bite marks and teeth by denaturing gradient gel electrophoresis. New Zealand Medical Journal, 120(1255). Retrieved from http://journal.nzma.org.nz/journal/120-1255/2574/content.pdf
Parmar, D., Hauman, C. H. J., Tompkins, G., Leichter, J., & Ichim, I. (2007). A novel technique to assess viability of bacteria in dentine. Proceedings of the Faculty of Dentistry 3M Research Day. Retrieved from http://dentistry.otago.ac.nz/research/rd2007/presentations.html
Hsu, L. T., Power, D. A., Burton, J. P., Hauman, J. H., Tagg, J. R., & Tompkins, G. R. (2007). Comparison of Streptococcal DNA amplified from bite marks and teeth. Proceedings of the Faculty of Dentistry 3M Research Day. Retrieved from http://dentistry.otago.ac.nz/research/rd2007/presentations.html
Matejka, K. M., Tompkins, G. R., Lamping, E., & Monk, B. C. (2007). Characteristics of a variant phenotype of Moraxella catarrhalis. Proceedings of the Faculty of Dentistry 3M Research Day. Retrieved from http://dentistry.otago.ac.nz/research/rd2007/presentations.html
2006
Journal - Research Article
Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2006). Identification and characterization of the loci encoding the competence-associated alternative σ factor of Streptococcus gordonii. FEMS Microbiology Letters, 259(1), 27-34.
Journal - Research Other
Cannon, R. D., & Tompkins, G. R. (2006). Improving the effectiveness of chlorhexidine. New Zealand Dental Journal, 102(1), 17.
Conference Contribution - Published proceedings: Abstract
Heng, N. C., Tagg, J. R., & Tompkins, G. R. (2006). Competence-dependent bacteriocin/beta-hemolysin production in Streptococcus gordonii. Proceedings of the American Society for Microbiology Conference. (pp. 93-94). Washington, DC: ASM. [Abstract]
Conference Contribution - Poster Presentation (not in published proceedings)
Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2006, November). Competence-dependent bacteriocin/β-haemolysin production by Streptococcus gordonii. Poster session presented at the New Zealand Microbiological Society Conference, Hamilton, New Zealand.
2005
Chapter in Book - Research
Tompkins, G. R. (2005). Genotypic comparison of oral bacteria isolated from bitemarks and teeth. In R. B. J. Dorion (Ed.), Bitemark evidence. (pp. 593-599). New York, NY, USA: Marcel Dekker.
Journal - Research Article
Kieser, J., Tompkins, G., Buckingham, D., Firth, N. A., & Swain, M. (2005). Bitemarks: Presentation, analysis, and evidential reliability. Forensic Pathology Reviews, 3, 157-179.
Rahimi, M., Heng, N. C. K., Kieser, J. A., & Tompkins, G. R. (2005). Genotypic comparison of bacteria recovered from human bite marks and teeth using arbitrarily primed PCR. Journal of Applied Microbiology, 99, 1265-1270.
2004
Journal - Research Article
Khalessi, A. M., Pack, A. R. C., Thomson, W. M., & Tompkins, G. R. (2004). An in vivo study of the plaque control efficacy of Persica™: A commercially available herbal mouthwash containing extracts of Salvadora persica. International Dental Journal, 54(5), 279-283.
Conference Contribution - Published proceedings: Abstract
Tompkins, G. R., Heng, N. C. K., & Tagg, J. R. (2004). Competence-dependent bacteriocin production in Streptococcus gordonii DL1 (Challis). Proceedings of the 44th Annual Meeting of Australia and New Zealand Division: International Association of Dental Research. Fiji: IADR. [Abstract]
Park, L. S.-Y., Simmonds, R. S., & Tompkins, G. R. (2004). Quantification of mutans streptococci in human saliva by PCR. Proceedings of the 44th Annual Meeting of Australia and New Zealand Division: International Association of Dental Research. Fiji: IADR. [Abstract]
2003
Journal - Research Article
Borgula, L. M., Robinson, F. G., Rahimi, M. A., Chew, K. E. K., Birchmeier, K. R., Owens, S. G., Kieser, J. A., & Tompkins, G. R. (2003). Isolation and genotypic comparison of oral streptococci from experimental bitemarks. Journal of Forensic Odonto-Stomatology, 21(2), 23-30.
Conference Contribution - Published proceedings: Abstract
Meldrum, A. M., Drummond, B. K., Tompkins, G. R., Shih, C., & Wickramaratne, M. (2003). Effect of two preventive regimes in decreasing mutans streptococci and lactobacilli. International Journal of Paediatric Dentistry, 13(Suppl. 1), (pp. 61). doi: 10.1046/j.1365-263X.13.s1.7.x
2002
Journal - Professional & Other Non-Research Articles
Tompkins, G. R. (2002). [Review of the book Essential Microbiology for Dentistry]. New Zealand Dental Journal, 98. [Book Review].
Conference Contribution - Published proceedings: Abstract
Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2002). Establishment of a relationship between competence for genetic transformation and bacteriocin production in Streptococcus gordonci DLI (Challis). ASM COnferences Streptococcal Genetics (6th). (pp. 68-69). Washington, D.C.: American Society for Microbiology. [Abstract]
Rahimi, M. A., Heng, N. C. K., Kieser, J. A., & Tompkins, G. R. (2002). Forensic PCR analysis of bacteria recovered from bitemarks. Journal of Dental Research. 81(Special Issue A), (pp. A149). Alexandria, VA, USA: International Association for Dental Research. [Abstract]
Khalessi, A., Pack, A. R. C., Thomson, W. M., & Tompkins, G. R. (2002). An in vivo study of the plaque control efficacy of Persica: a commercially available mouthwash containing extracts of Salvadora persica. Journal of Dental Research Special Issue A. 81(Special Issue A), (pp. A127). Alexandria, VA, USA: International Association for Dental Research. [Abstract]
2001
Journal - Research Article
Tompkins, G. R., O'Dell, N. L., Bryson, I. T., & Pennington, C. B. (2001). The effects of dietary ferric iron and iron deprivation on the bacterial composition of the mouse intestine. Current Microbiology, 43, 38-42.
Thomson, W. M., Edwards, S. J., Dobson-Le, D. P., Tompkins, G. R., Poulton, R., Knight, D. A., … Braithwaite, A. W. (2001). IL-1 genotype and adult periodontitis among young New Zealanders. Journal of Dental Research, 80, 1700-1703.
Conference Contribution - Published proceedings: Abstract
Keng, F.-Y., Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2001). Bacteriocins revisited: Competence and Bacteriocin Sensitivity in Streptococcus gordonii. New Zealand Microbiological Society Annual meeting. [Abstract]
Rahimi, M. A., Heng, N. C., Kieser, J. A., & Tompkins, G. R. (2001). ForensicPCR analysis of bacteria recovered from bite marks. International Association for Dental Research Australia/New Zealand 41st Annual Scientific Meeting. [Abstract]
Keng, F.-Y., Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2001). Competence-dependent bacteriocin sensitivity in Streptococcus gordonii. International Association for Dental Research Australia/New Zealand 41st Annual Scientific Meeting. [Abstract]
Heng, N. C. K., Tagg, J. R., & Tompkins, G. R. (2001). Licensed to Kill: Competence and Bacteriocin Production. Streptococcus gordonii. Wellington. [Abstract]
Matejka, K. M., Bremer, P. J., & Tompkins, G. R. (2001). Antiobiotic sensitivity of Moraxella catarrhalis biofilms. New Zealand Microbiological Society Annual Conference. (pp. A11-8). Wellington New Zealand. [Abstract]
2000
Journal - Research Article
Simmonds, R. S., Tompkins, G. R., & George, R. J. (2000). Dental caries and the microbial ecology of dental plaque: A review of recent advances. New Zealand Dental Journal, 96, 44-49.
Calderone, R., Suzuki, S., Cannon, R., Cho, T., Boyd, D., Calera, J., … Holmes, A., Jeng, H.-W., … O'Sullivan, J. M., … Tompkins, G. R., & Watanabe, T. (2000). Candida albicans: Adherence, signalling and virulence. Medical Mycology, 38(Suppl. 1), 125-137.
Conference Contribution - Published proceedings: Abstract
Duncan, W., Sims, T., Pack, A. R. C., Braham, P., Tompkins, G., Page, R. C., & Persson, G. R. (2000). Serum IgG to periodontal bacteria in sheep with periodontitis. Journal of Dental Research, 79(1, Suppl. ), (pp. 308). [Abstract]
Duncan, W. J., Pack, A. R. C., Persson, G. R., Tompkins, G. R., Page, R., & Schofield, J. (2000). Aspects of naturally-occuring periodontis in sheep. Journal of Dental Research. 79, (pp. 404). [Abstract]
Sims, T. J., Duncan, W. J., Braham, P., Schifferle, R. E., Sojar, H., Pack, A. R. C., … Tompkins, G. R., … Persson, G. R. (2000). Aspects of naturally-occuring periodontitis in sheep. Journal of Dental Research. 79, (pp. 308). [Abstract]
Duncan, W. J., Sims, T., Pack, A. R. C., Braham, P., Tompkins, G. R., Page, R. C., & Persson, G. R. (2000). Serum IgC to peridontal bacteria in sheep with periodontitis. Journal of Dental Research. 79, (pp. 308). [Abstract]
Jeng, H.-W., Holmes, A. R., Tompkins, G. R., & Cannon, R. D. (2000). Candida albicans adhesins recognising salivary basic proline rich proteins. IADR (78th General Assembly). 79(Abstracts supplement). Journal of Dental Research. [Abstract]
1999
Conference Contribution - Published proceedings: Abstract
Borgula, L. M., & Tompkins, G. R. (1999). Comparison of bacteria recovered from human bite marks and teeth by restriction fragment-length polymorphism analysis of genomic DNA. International Association of Forensic Science, 15 Triennial Meeting. [Abstract]
Elhably, B. M., Dolheguy, M. R., & Tompkins, G. R. (1999). The effect of Meswak (Salvadora persica) use on oral streptococci. International Association for Dental Research Australia/New Zealand 39th Annual Scientific Meeting. [Abstract]
1998
Conference Contribution - Published proceedings: Abstract
Jeng, H.-W., Holmes, A. R., Tompkins, G. R., & Cannon, R. D. (1998). Identification of Candida albicans adhesins that recognise salivary proteins. New Zealand Microbiological Society Annual Meeting. [Abstract]
1997
Journal - Research Article
Tompkins, G. R., Wood, D. P., & Birchmeier, K. R. (1997). Detection and comparison of specific hemin binding by Porphyromonas gingivalis and Prevotella intermedia. Journal of Bacteriology, 179(3), 620-626.
Tompkins, G. R., Peavey, M. A. A., Birchmeier, K. R., & Tagg, J. R. (1997). Bacteriocin production and sensitivity among coaggregating and non-coaggregating oral streptococci. Oral Microbiology & Immunology, 12(2), 98-105.
Knoernschild, K. L. L., Tompkins, G. R., Schuster, G. S., Lefebvre, C. A., & Russell, C. M. (1997). Effect of treatment concentration on lipopolysaccharide affinity for two alloys. Dental Materials, 13(2), 111-117.
Conference Contribution - Published proceedings: Full paper
Robinson, F. G., Owens, S., Birchmeier, K. R., & Tompkins, G. R. (1997). Recovery of oral streptococci from bitemarks inflicted on skin of living humans. Proceedings of the American Academy of Forensic Sciences. 3, (pp. 103). New York: American Academy of Forensic Sciences. [Full Paper]