Associate Professor Simon Guan

2026

Journal - Research Article

Guan, G., Tjhang, V., Loo, V. W. Y., Chang, Y. X., & Han, X. (2026). Ultrasound assessment of temporomandibular joint capsule-condyle distances across Angle’s occlusal classifications. Oral Surgery, Oral Medicine, Oral Pathology & Oral Radiology. Advance online publication. doi: 10.1016/j.oooo.2026.05.002

Wu, T., Farella, M., Guan, S., Cannon, R. D., & Mei, L. (2026). Effects of residual adhesive debonding methods on human enamel: a scoping review. Seminars in Orthodontics, 32(3), 477-485. doi: 10.1053/j.sodo.2025.10.003

Wu, T., Farella, M., Guan, G., Cannon, R. D., & Li, M. (2026). Nano- and microscale evaluation of human enamel after different debonding methods. American Journal of Orthodontics & Dentofacial Orthopedics. Advance online publication. doi: 10.1016/j.ajodo.2026.02.019

Balasubramaniam, R., Manfredini, D., & Guan, G. (2026). Sleep bruxism: A narrative review of current concepts, mechanisms, and clinical implications. Journal of the Royal Society of New Zealand, 56(2), e70046. doi: 10.1002/snz2.70046

Zhang, R., Liu, M., Liong, O., Liu, L., Guan, S., Chen, K., … Mei, L. (2026). AI in the chair: A multi-centre study of Doctor AI answering orthodontic patient questions. Journal of the Royal Society of New Zealand, 56, e70035. doi: 10.1002/snz2.70035

Mei, L., Yan, F., Cheng, L., Na, A., Cannon, R. D., & Guan, G. (2026). Tongue brushing and oral probiotics for the treatment of halitosis: A randomized controlled trial. Journal of Breath Research, 10(1), 016012. doi: 10.1088/1752-7163/ae3edc

2025

Journal - Research Article

Ahmad Zainuddin, F. Z., Guan, G., Ting, G. S., & Thomson, W. M. (2025). Measuring dry mouth in older people in residential care. Gerodontology. Advance online publication. doi: 10.1111/ger.70021

Ronayne, C., Olson, H., De Silva, H., Guan, G., Newsham-West, K., & Anakin, M. (2025). Intertwined, multidirectional and interactive: A qualitative study of students’ experiences of interprofessional competencies during an oral pathology module. Focus on Health Professional Education, 26(2), 46-62.

Guan, G., Rathninde, L., Friedlander, L., Hanlin, S., Polonowita, A., & Mei, L. (2025). Students’ perceived knowledge and confidence of performing extra-oral clinical examinations during Bachelor of Dental Surgery (BDS) study in New Zealand. New Zealand Medical Journal/Te ara tika o te hauora hapori, 138(1615), 20-33. doi: 10.26635/6965.6830

Deng, L., Guan, G., Cannon, R. D., & Mei, L. (2025). Age-related oral microbiota dysbiosis and systemic diseases. Microbial Pathogenesis, 205, 107717. doi: 10.1016/j.micpath.2025.107717

Mei, L., Au, C., Foo, S., Gao, C., Zhu, S., & Guan, G. (2025). Three-dimensional stereophotogrammetry facial morphologic signatures of temporomandibular disorders. Journal of Oral Pathology & Medicine. Advance online publication. doi: 10.1111/jop.13644

Tennekoon, S., Guan, G., Ting, G., & Li, K. C. (2025). Analysis of changes in saliva composition in patients with oral cancer and oropharyngeal cancer using Fourier-transform infrared spectroscopy. New Zealand Dental Journal, 121(1), 17-23.

Lin, Y. K., Mei, L., Narsinh, P., Tong, D., Polonowita, A., & Guan, G. (2025). Patient perceptions of the service provision at an academic oral medicine clinic. New Zealand Dental Journal, 121(1), 9-14.

Guan, G., Coates, D. E., Sun, Q., Cannon, R. D., & Mei, L. (2025). Atomic force microscopy for revealing oncological nanomechanobiology and thermodynamics. ACS Nano, 19(11), 10862-10877. doi: 10.1021/acsnano.4c14837

Mei, L., Huang, Z., Wang, Z., Sun, S., Zhu, S., Gao, C., Polonowita, A., & Guan, G. (2025). Electroencephalographic signature of TMD patients: clinical implications. British Journal of Oral & Maxillofacial Surgery. Advance online publication. doi: 10.1016/j.bjoms.2025.02.013

Wu, T., Farella, M., Guan, S., Cannon, R. D., & Mei, L. (2025). A national survey of the debonding protocols used by orthodontists in New Zealand. Australasian Orthodontic Journal, 41(1), 1-7. doi: 10.2478/aoj-2025-0001

Guan, G., Tjhang, V., Sun, H., Polonowita, A., & Mei, L. (2025). Halitosis in oral lichen planus patients. Journal of Breath Research, 19, 016007. doi: 10.1088/1752-7163/ad8ee7

Guan, G., Lim, A., Sim, H., Khor, Y., & Mei, L. (2025). Interprofessional communication between general dental practitioners and general medical practitioners: A qualitative study. Journal of Primary Health Care, 17(1), 30-36. doi: 10.1071/HC24071

Journal - Research Other

Moore, B., Guan, G., Whitley, B., Mei, L., & Polonowita, A. D. (2025). Distinguishing chronic pain from mechanical factors in chronic TMD: A narrative review. Journal of the Royal Society of New Zealand. Advance online publication. doi: 10.1080/03036758.2025.2520387

France, A., De Silva, H. L., Tong, D., Mei, L., & Guan, G. (2025). From tooth to vision: A decade of breakthroughs in osteo-odonto-keratoprosthesis (OOKP) and modified OOKP: Global insights into surgical techniques, outcomes, and pioneering research. Seminars in Ophthalmology. Advance online publication. doi: 10.1080/08820538.2025.2503910

Guan, G., Polonowita, A. K., Mei, L., Polonowita, D. A., & Polonowita, A. D. (2025). Chronic orofacial pain and pharmacological management: A Clinical guide. Oral Surgery, Oral Medicine, Oral Pathology & Oral Radiology. Advance online publication. doi: 10.1016/j.oooo.2025.02.005

Wang, O., Mei, L., Polonowita, A., & Guan, G. (2025). Exploring the link between burning mouth syndrome and human herpesvirus-6B: A narrative review on pathogenesis. Journal of the Royal Society of New Zealand, 55(6), 1384-1399. doi: 10.1080/03036758.2024.2406818

Conference Contribution - Verbal presentation and other Conference outputs

Wu, T., Farella, M., Guan, G., Cannon, R. D., & Li, M. (2025, September). Nano- and micro-scale evaluation of human enamel following different debonding methods. Verbal presentation at the Faculty of Dentistry Clinical and Research Excellence Symposium, Dunedin, New Zealand.

Zhang, R., Liu, M., Liong, O., Liu, L., Guan, G., Chen, K., & Mei, L. (2025, September). AI in the chair: A multi-centre study of Doctor AI answering orthodontic patient questions. Verbal presentation at the Faculty of Dentistry Clinical and Research Excellence Symposium, Dunedin, New Zealand.

2024

Journal - Research Article

Mei, L., Jin, C., Na, A., Marra, J., Guan, S., & Choi, J. (2024). Biomechanical aging behaviour of clear aligners. Australian Orthodontic Journal, 40(1), 60-66. doi: 10.2478/aoj-2024-0006)

Mei, L., Wang, Z., Guo, O., Zhang, L., & Guan, G. (2024). TikTok talks teeth: A quantitative and qualitative analysis of fixed appliance related TikTok videos. Australasian Orthodontic Journal, 40(1), 50-59. doi: 10.2478/aoj-2024-0005

Avery, N., Fukushima, K., Guan, G., Praganta, J., Rich, A., Vincent, M., & Robertson, S. (2024). Familial aggregation of keratinising desquamative squamous metaplasia in the urinary tract. BJU International, 133(Suppl. 3), 15-17. doi: 10.1111/bju.16160

Journal - Research Other

van Kuijk, M., De Silva, H., Chan, L., & Guan, G. (2024). Cribriform adenocarcinoma of the minor salivary glands: Case report and literature review. New Zealand Medical Journal/Te ara tika o te hauora hapori, 137(1599), 103-112. Retrieved from https://www.nzmj.org.nz/

Polonowita, A. D., Polonowita, A. K., Mei, L., & Guan, G. (2024). Construction of the chronic temporomandibular disorder patients: The association between neural and psychological pathways. New Zealand Medical Journal/Te ara tika o te hauora hapori, 137(1595), 80-93. Retrieved from https://www.nzmj.org.nz/

Polonowita, A., Mei, L., & Guan, G. (2024). The deconstruction of chronic orofacial pain and a hiding inhibition pathway of orofacial pain: The trigeminal proprioceptive mesencephalic periaqueductal gray pathway. New Zealand Medical Journal/Te ara tika o te hauora hapori, 137(1588), 67-79. Retrieved from https://nzmj.org.nz/

2023

Chapter in Book - Research

Guan, G., & Polonowita, A. (2023). Immunology and the oral cavity. In R. Balasubramaniam, S.-C. Yeoh, T. Yap & S. R. Prabhu (Eds.), Oral medicine: A clinical guide. (pp. 319-323). Cham, Switzerland: Springer. doi: 10.1007/978-3-031-36797-7_49

Polonowita, A., & Guan, G. (2023). Infection-related oral ulceration. In R. Balasubramaniam, S.-C. Yeoh, T. Yap & S. R. Prabhu (Eds.), Oral medicine: A clinical guide. (pp. 217-219). Cham, Switzerland: Springer. doi: 10.1007/978-3-031-36797-7_49

Polonowita, A., & Guan, G. (2023). Aphthae and recurrent aphthous stomatitis. In R. Balasubramaniam, S.-C. Yeoh, T. Yap & S. R. Prabhu (Eds.), Oral medicine: A clinical guide. (pp. 213-215). Cham, Switzerland: Springer. doi: 10.1007/978-3-031-36797-7_49

Polonowita, A., & Guan, G. (2023). Differential diagnosis of oral ulceration. In R. Balasubramaniam, S.-C. Yeoh, T. Yap & S. R. Prabhu (Eds.), Oral medicine: A clinical guide. (pp. 205-207). Cham, Switzerland: Springer. doi: 10.1007/978-3-031-36797-7_49

Polonowita, A., & Guan, G. (2023). Traumatic oral ulceration. In R. Balasubramaniam, S.-C. Yeoh, T. Yap & S. R. Prabhu (Eds.), Oral medicine: A clinical guide. (pp. 209-211). Cham, Switzerland: Springer. doi: 10.1007/978-3-031-36797-7_50

Guan, G., & Polonowita, A. (2023). Allergy and the mouth. In R. Balasubramaniam, S.-C. Yeoh, T. Yap & S. R. Prabhu (Eds.), Oral medicine: A clinical guide. (pp. 103-105). Cham, Switzerland: Springer. doi: 10.1007/978-3-031-36797-7_24

Journal - Research Article

Au, C., Li, J., Jin, L., Wu, T., Guan, G., & Mei, L. (2023). Non-attendance of appointments at the orthodontic clinic. Australasian Orthodontic Journal, 39(2), 185-193. doi: 10.2478/aoj-2023-0035

Guan, G., Mei, L., Yu, C., Tan, Y., & Han, C. (2023). Patient-centred care attitudes and knowledge: A national study of BDS students in New Zealand. BMC Medical Education, 23, 516. doi: 10.1186/s12909-023-04496-7

Li, M., & Guan, G. (2023). Profilometry and atomic force microscopy for surface characterization. Nano TransMed, 2(1), 69-73. doi: 10.26599/NTM.2023.9130017

Journal - Research Other

El Tantawi, M., Lam, W. Y. H., Giraudeau, N., Virtanen, J. I., Matanhire, C., Chifamba, T., … Hasmun, N., Guan, G., Polonowita, A., … Folayan, M. O. (2023). Teledentistry from research to practice: A tale of nineteen countries. Frontiers in Oral Health, 4, 1188557. doi: 10.3389/froh.2023.1188557

Guan, G., Cannon, R. D., Coates, D. E., & Mei, L. (2023). Effect of the Rho-kinase/ROCK signaling pathway on cytoskeleton components. Genes, 14, 272. doi: 10.3390/genes14020272

2022

Journal - Research Article

Han, C., Mei, L., Liu, A., Ya Mohammad Hassan, S., Polonowita, A., & Guan, G. (2022). Oral medicine services: A two-centre study of 99,603 patients between 2015 and 2020. Journal of International Medical Research, 50(8). doi: 10.1177/03000605221115384

Yu, W. W., Goh, R., Cheong, E., Guan, G., Jin, C., Cannon, R. D., Farella, M., & Mei, L. (2022). Prevalence of halitosis among young adults in Dunedin, New Zealand. International Journal of Dental Hygiene, 20, 700-707. doi: 10.1111/idh.12609

Polonowita, A., Guan, G., Thomson, W. M., & Martin-Hendrie, R. (2022). Using telehealth for oral medicine patient management during the COVID-19 lockdown. Oral Surgery, 15, 291-304. doi: 10.1111/ors.12721

Ratnayake, J., Guan, G., Polonowita, A., Gray, A. R., Loch, C., Li, K. C., Waddell, J. N., Lyons, K., & Brunton, P. A. (2022). Measuring changes in jaw opening forces to assess the degree of improvement in patients with temporomandibular disorders. Applied Sciences, 12(3), 1224. doi: 10.3390/app12031224

Journal - Research Other

Guan, G., He, Y., & Mei, L. (2022). Atomic force microscopy: A nanobiotechnology for cellular research. Nano TransMed, 1, e9130004. doi: 10.26599/NTM.2022.9130004

Guan, G., Rich, A. M., Polonowita, A., & Mei, L. (2022). Review of taste and taste disturbance in COVID-19 patients. New Zealand Medical Journal, 135(1549), 81-91. Retrieved from https://www.nzma.org.nz/journal

Conference Contribution - Published proceedings: Abstract

Zainuddin, F. Z. A., Ting, G., Thomson, M., & Guan, S. (2022). Measuring dry mouth in older people in residential care in Dunedin. New Zealand Dental Journal, 118(4), (pp. 171). [Abstract]

Tennekoon, S., Li, K. C., Guan, S., Ting, G., & Kelly, L. (2022). Analysis of changes in saliva composition in patients with oral and oropharyngeal cancer using Fourier Transform Infrared Spectroscopy. New Zealand Dental Journal, 118(4), (pp. 169). [Abstract]

Sun, Q., Seo, B., Hussaini, H., Guan, S., & Rich, A. (2022). Expression of proinflammatory cytokines in cultured keratinocytes from specimens on oral lichen planus. New Zealand Dental Journal, 118(4), (pp. 166). [Abstract]

2021

Journal - Research Article

Wang, Y., Bai, S., Cheng, Q., Zeng, Y., Xu, X., & Guan, G. (2021). Naringenin promotes SDF-1/CXCR4 signaling pathway in BMSCs osteogenic differentiation. Folia Histochemica et Cytobiologica, 59(1), 66-73. doi: 10.5603/FHC.a2021.0008

Won, J., Guan, G., Mei, L., Ma, T., Lai, Y., Zafar, S., Mei, M. L., & Thomson, W. M. (2021). A multicenter study of dental curricula in Asia/Pacific nations: The views and experiences of final-year dental students. Journal of Dental Education, 85, 660-668. doi: 10.1002/jdd.12515

Journal - Research Other

Li, B., Guan, G., Mei, L., Jiao, K., & Li, H. (2021). Pathological mechanism of chondrocytes and the surrounding environment during osteoarthritis of temporomandibular joint. Journal of Cellular & Molecular Medicine, 25, 4902-4911. doi: 10.1111/jcmm.16514

Lv, N., Sun, M., Polonowita, A., Mei, L., & Guan, G. (2021). Management of oral medicine emergencies during COVID-19: A study to develop practice guidelines. Journal of Dental Sciences, 16, 493-500. doi: 10.1016/j.jds.2020.07.016

2020

Journal - Research Article

Guo, J., Li, L., Guan, G., Bennani, F., & Mei, L. (2020). Oral health knowledge and practice among orthodontic clients in China and New Zealand. Canadian Journal of Dental Hygiene / Journal canadien de l'hygiène dentaire, 54(3), 124-132.

Guo, J., Low, K. S., Mei, L., Li, J. H., Qu, W., & Guan, G. (2020). Use of traditional medicine for dental care by different ethnic groups in New Zealand. BMC Oral Health, 20, 280. doi: 10.1186/s12903-020-01272-7

Ratnayake, J., Guan, G., Polonowita, A., Li, K. C., Gray, A., Waddell, J. N., Loch, C., & Brunton, P. A. (2020). Can the measurement of jaw-opening forces assist in the diagnosis of temporomandibular disorders? Journal of Oral & Facial Pain & Headache, 34(3), 199-205. doi: 10.11607/ofph.2587

Xu, X., Shum, M., Ting, A., Mei, L., & Guan, G. (2020). Estimation of jaw-opening forces, energy expenditure and jaw-opening patterns in adults. Archives of Oral Biology, 117, 104836. doi: 10.1016/j.archoralbio.2020.104836

Guan, G., Mei, L., Polonowita, A., Hussaini, H., Seo, B., & Rich, A. M. (2020). Malignant transformation in oral lichen planus and lichenoid lesions: A 14-year longitudinal cohort study of 829 patients in New Zealand. Oral Surgery, Oral Medicine, Oral Pathology & Oral Radiology, 130(4), 411-418. doi: 10.1016/j.oooo.2020.07.002

Mei, L., Lai, Y., Lee, P., Ng, A., Tan, K., Zafar, S., & Guan, G. (2020). Final year dental students' career plans, work patterns, work-life balance and domestic life in New Zealand and Australia. European Journal of Dental Education, 24(4), 679-686. doi: 10.1111/eje.12556

Guan, G., Lau, J., Yew, V., U, J., Qu, W., Lam, J., Polonowita, A., & Mei, L. (2020). Referrals by general dental practitioners and medical practitioners to oral medicine specialists in New Zealand: A study to develop protocol guidelines. Oral Surgery, Oral Medicine, Oral Pathology & Oral Radiology, 130(1), 43-51.e5. doi: 10.1016/j.oooo.2020.03.050

Xu, J., Zhao, X., Zeng, J., Yu, J.-H., Guan, S., Xu, X.-M., & Mei, L. (2020). Role of autophagy in the periodontal ligament reconstruction during orthodontic tooth movement in rats. Journal of Dental Sciences, 15, 351-363. doi: 10.1016/j.jds.2020.02.005

Guo, J., Yan, X., Li, S., Van der Walt, J., Guan, G., & Mei, L. (2020). Quantitative and qualitative analyses of orthodontic-related videos on YouTube. Angle Orthodontist, 90(3), 411-418. doi: 10.2319/082019-542.1

Jiang, B., Xu, J., Zhou, Y., Mao, J., Guan, G., Xu, X., & Mei, L. (2020). Estrogen enhances osteogenic differentiation of human periodontal ligament stem cells by activating the Wnt/β-catenin signaling pathway. Journal of Craniofacial Surgery, 31, 583-587. doi: 10.1097/scs.0000000000006226

Ratnayake, J. T., Ross, E. D., Dias, G. J., Shanafelt, K. M., Taylor, S. S., Gould, M. L., Guan, G., & Cathro, P. R. (2020). Preparation, characterisation and in-vitro biocompatibility study of a bone graft developed from waste bovine teeth for bone regeneration. Materials Today Communications, 22, 100732. doi: 10.1016/j.mtcomm.2019.100732

Journal - Research Other

Sun, M., Lv, N., Xiao, Y., Li, J., & Guan, G. (2020). A rare case of accessory maxilla: A case report and literature review of Tessier no. 7 clefts. Journal of International Medical Research, 48(5), 1-9. doi: 10.1177/0300060520925680

Guan, G., Won, J., Mei, L., & Polonowita, A. (2020). Extensive adipose replacement of the parotid glands: An unusual presentation of sialadenosis: A case report and literature review. Oral Surgery, 13, 41-47. doi: 10.1111/ors.12442

2019

Conference Contribution - Published proceedings: Abstract

Ratnayake, J., Guan, S., Polonowita, A., Li, K. C., Waddell, N., Loch, C., Gray, A., & Brunton, P. (2019). Can the measurement of jaw-opening forces assist in diagnosing temporomandibular-disorders? Journal of Dental Research, 98(A), 0179. Retrieved from https://iadr.abstractarchives.com

Ratnayake, J., Ross, E., Dias, G., Guan, S., & Cathro, P. (2019). Development and characterisation of a novel bone-graft from bovine teeth. Journal of Dental Research, 98(A), 0490. Retrieved from https://iadr.abstractarchives.com

Cathro, P., Ratnayake, J., Dias, G., Ross, E., Shanafelt, K., Taylor, S., & Guan, S. (2019). Biocompatibility and bioactivity of a novel bone graft material developed from the dentine of waste bovine teeth. International Endodontic Journal, 52(Suppl. 1), (pp. 12). doi: 10.1111/iej.13172

2018

Journal - Research Article

Wilson, E., Grant, B., Tobin-Stickings, R., Lewthwaite, H., Franklin, G., Oh, S., Guan, S., Borowsky, T., Thwaites, K., Leaper, T., Lee, J., Jack, S., & Sopoaga, F. (2018). Traditional medicine use in the Pacific community in Dunedin New Zealand. Pacific Health Dialog, 21(1), 17-26. doi: 10.26635/phd.2018.903

Guan, G., Bakr, M. M., Firth, N., & Love, R. M. (2018). Expression of cyclin D1 correlates with p27^KIP1 and regulates the degree of oral dysplasia and squamous cell carcinoma differentiation. Oral Surgery, Oral Medicine, Oral Pathology & Oral Radiology, 126(2), 174-183. doi: 10.1016/j.oooo.2018.01.015

Journal - Research Other

Guan, G., & Mei, L. (2018). A case series: Zinc deficiency as a potential contributor to oral dysgeusia. Modern Approaches in Dentistry & Oral Health Care, 2(5), 198-203. doi: 10.32474/MADOHC.2018.02.000146

Bakr, M. M., Guan, S., Firth, N., & Love, R. M. (2018). Cyclin D1 and P27KIP1: The gatekeepers of dysplasia. Journal of Immunological Sciences, 2(3), 30-39. doi: 10.29245/2578-3009/2018/3.1142

2015

Journal - Research Article

Guan, G., & Firth, N. (2015). Oral manifestations as an early clinical sign of acute myeloid leukaemia: A case report. Australian Dental Journal, 60(1), 123-127. doi: 10.1111/adj.12272

Conference Contribution - Published proceedings: Abstract

Guan, S., Firth, N., & Love, R. (2015). Expression of cyclin D1 and its correlation with p27KIP1 in normal oral mucosa, oral dysplasia and oral squamous cell carcinoma. Oral Surgery, Oral Medicine, Oral Pathology & Oral Radiology, 119(3), (pp. e201). doi: 10.1016/j.oooo.2014.07.440