2023 Award Winners

There were two winners in 2023:

  • Ruba Abdulrahim , Greifswald, Germany for presenting “Impact of Silver Diammine Fluoride Use on the Need for Dental General Anaesthesia Treatment in Children”
  • Mathilde Frost Kristensen, Aarhus, Denmark for presenting “Ratiometric monitoring of extracellular pH at the microscale in in situ-grown dental biofilms exposed to different saliva flow velocities and film thicknesses”



About the Award

The ORCA Junior Scientist Award, inaugurated in 2007 as the Young Investigator’s Award and renamed into "ORCA Nathan Cochrane Junior Scientist Award" at the General Assembly of 4 July 2014 in Greifswald, Germany, intends to encourage and support young scientists in the field of cariology. It is awarded for an outstanding contribution to the annual ORCA conference.

The prize winner receives a certificate and is entitled to receive reimbursement of the congress fees of a future ORCA Congress.

Applicants for the ORCA Nathan Cochrane Junior Scientist Award are required to fulfil the following criteria:

  1. be a member of ORCA;
  2. have not more than 5 international publications identified in Medline on the day of the deadline for abstract submission for the next ORCA Congress;
  3. be present at the closing ceremony of the ORCA Congress;
  4. not be a previous winner of the ORCA Young Investigator/Junior Scientist Award;
  5. must be the first author of the presentation;
  6. the presentation must not be a review.

Presenters enter the competition by ticking the appropriate box when submitting their abstract via the online submission system.  

The next competition for the ORCA Nathan Cochrane Junior Scientist Award will take part on the next ORCA congress. The deadline to apply for this competition is the same as the one for the abstract submission for the next ORCA congress. The submission of the abstract follows the normal regulations for the congress and additional requirements will be announced after the acceptance of the abstract at the beginning of February.

Past Winners of ORCA Junior Scientist Awards


Winner, Affiliation and Country

Bibliography of Publication of awarded Presentation


Nathan Cochrane, 
University of Melbourne, Melbourne, Australia

Cochrane NJ, Saranathan S, Cai F, Cross K J, Reynolds EC. Enamel subsurface lesion remineralisation with casein phosphopeptide stabilised solutions of calcium, phosphate and fluoride. Caries Res 2008; 42:88–97


Peter Tschoppe, 
Charite, Free University and Humboldt University, Berlin, Germany

Tschoppe P, Meyer-Lueckel H.
Mineral distribution of artificial dentinal caries lesions after treatment with fluoride agents in combination with saliva Substitutes. Arch Oral Biol 2011; 56:775 – 784


Maria Mantzourani, 
Kings College London, London, UK

Mantzourani M, Gilbert SC, Sulong HNH, Sheehy EC , Tank S, Fenlon M, Beighton D.The isolation of bifidobacteria from occlusal carious lesions in children and adults. Caries Res 2009; 43:308–313


Nadine Schlüter, 
University of Giessen, 
Giessen, Germany

Schlueter N, Lussi A, Tolle A, Ganss C. Effects of Erosion Protocol Design on Erosion/Abrasion Study Outcome and on Active Agent (NaF and SnF2) Efficacy. Caries Res 2016;50:170-179


Nattida Charadram, 
University of Sydney, Sydney, Australia

Charadram N, Farahani RM, Harty D, Rathsam C, Swain MV, Hunter N. Regulation of reactionary dentin formation by odontoblasts in response to polymicrobial invasion of dentin matrix. Bone 2012; 50:265–275


Nasrine Mohammed, 
Queen Mary University, London, UK

Mohammed NR, Kent NW, Lynch RJM, Karpukhina N, Hill R, Anderson P. Effects of fluoride on in vitro enamel demineralization analyzed by 19 F MAS-NMR. Caries Res 2013; 47:421–428

2013 Tobias Winterfeld
University of Giessen, Germany
Schlueter N, Winterfeld K, Quera V, Winterfeld T, Ganss C. Toothbrushing Systematics Index (TSI) - A new tool for quantifying systematics in toothbrushing behaviour. PlosOne 2018 13(4): e0196497
2014 Leandro Hilgert
Faculty of Health Sciences,
University of Brasilia, Brazil 
Hilgert LA, Leal SC, Mulder J, Creugers NHJ, Frencken JE. Caries-preventive effect of supervised tooth brushing and sealants. J Dent Res 2015;94:1218-24.
2015 Ying Liao
Sichuan University and ACTA

Liao Y, Chen J, Brandt BW, Zhu Y, Li J, van Loveren C, Deng DM. Identification and functional analysis of genome mutations in a fluoride-resistant Streptococcus mutans strain. PLoS One. 2015 Apr 9;10(4):e0122630.


Lina Dziaugyte
Institute of Odontology, Vilnius University, Lithuania

Džiaugytė L, Aleksejūnienė J, Brukienė V, Pečiulienė V. Self-efficacy theory-based intervention in adolescents: a cluster randomized trial-focus on oral self-care practice and oral self-care skills. Int J Paediatr Dent. 2017 Jan;27(1):37-46.


Diego F. Nóbrega
Piracicaba Dental School, University of Campinas, Brazil

Nóbrega DF, Leitão TJ, Cury JA, Tenuta LMA. Fluoride Binding to Dental Biofilm Bacteria: Synergistic Effect with Calcium Questioned. Caries Res. 2019;53(1):10-15.


Nicole R. Aimée
Faculty of Health Sciences, University of Brasília, Brazil

Aimée NR, van Wikj AJ, Varjão MM, Paes AB Lourenço J, MEstrinho HD, Carvalho JC. Changes in adolescents' oral health status: Responsiveness of the child perception questionnaire 11-14. Caries Res. 2019 Jul 30:1-9. Doi: 10.1159/000501587.
2019 Elizabeth S. Rocha
School of Dentistry, University of São Paulo, Brazil
2020 Ashley Verlinden
Center for Dentistry and Oral Hygiene, University Medical Centre Groningen, Groningen, The Netherlands and
The Netherlands Organisation for Applied Scientific Research TNO Child Health, Leiden

Verlinden DA, Schuller AA, Vermaire JHE, Reijneveld SA. Referral from well-child care clinics to dental clinics leads to earlier initiation of preventive dental visits: A quasi-experimental study. Int J Paediatr Dent. 2024 Mar;34(2):190-197. doi: 10.1111/ipd.13124.


Dono Kahharova
ACTA, Department of Preventive Dentistry, Amsterdam, The Netherlands

Kahharova D, Pappalardo VY, Buijs MJ, de Menezes RX, Peters M, Jackson R, Hara AT, Eckert G, Katz B, Keels MA, Levy SM, Zaura E, Brandt BW, Fontana M. Microbial Indicators of Dental Health, Dysbiosis, and Early Childhood Caries.
J Dent Res. 2023 Jul;102(7):759-766.
2022 Audrey Hollanders
Department of Dentistry, Radboud University Medical Center, Nijmegen, The Netherlands