This study systematizes and critically evaluates approaches to treating the periungual space within contemporary professional nail service. The central aim is to substantiate an authorial protocol that integrates electric-file and manual techniques on the basis of a morphologically grounded analysis of tissues. The methodological framework combines (i) a systematic review of specialized literature, (ii) a comparative analysis of the thermodynamic characteristics of a rotary instrument, and (iii) case studies compiled from the practical materials of international championships. The obtained results indicate that the differentiated selection of bit geometry and speed modes can reduce the probability of thermal impact on the nail matrix by 87% while simultaneously improving the durability of decorative coatings. The set of conclusions aligns with the hypothesis that a combined protocol should be prioritized when servicing clients with thin cuticle tissue and with hyperkeratotic cuticle variants. The scientific novelty lies in coupling tribological friction parameters with dermatological characteristics of the epidermis in order to construct a predictive model of safe manicure practice. The proposed provisions have practical value for nail-design specialists, judges of professional competitions, and developers of educational standards in the beauty industry.

electric-file manicure, combined manicure, cuticle, pterygium, decision-making algorithm, professional standards, biosafety, nail industry, nail dermatology, e-file

Nail Salon Market Size, Growth Analysis Report [2033] | SkyQuest. Retrieved from: https://www.skyquestt.com/report/nail-salon-market (date accessed: October 5, 2025).

Nail Salon Market | Global Market Insights. Retrieved from: https://www.gminsights.com/industry-analysis/nail-salon-market (date accessed: October 6, 2025).

Safety and Effectiveness of the E-File Dry Manicure Technique: A Systematic Review of Risks and Scientific Validation of Common Practices | The American Journal of Interdisciplinary Innovations and Research. Retrieved from: https://www.theamericanjournals.com/index.php/tajiir/article/view/6866 (date accessed: October 7, 2025).

Arora, H., & Tosti, A. (2017). Safety and efficacy of nail products. Cosmetics, 4(3), 24. https://doi.org/10.3390/cosmetics4030024

Satasia, M., & Sutaria, A. H. (2023). Nail whispers revealing dermatological and systemic secrets: An analysis of nail disorders associated with diverse dermatological and systemic conditions. Cureus, 15(9), e45007. https://doi.org/10.7759/cureus.45007

Nail Salon Market Size, Share, Trends, Growth Report, 2030 | Grand View Research. Retrieved from: https://www.grandviewresearch.com/industry-analysis/nail-salon-market-report (date accessed: October 10, 2025).

Faculty of Medicine, Cairo University Postgraduate Research Protocol Template (Clinical Trials) [PDF]. Retrieved from: https://cdn.clinicaltrials.gov/large-docs/59/NCT07311759/Prot_SAP_000.pdf (date accessed: October 11, 2025).

Nails: Fingernail & Toenail Anatomy | Cleveland Clinic. Retrieved from: https://my.clevelandclinic.org/health/body/nail-anatomy (date accessed: October 12, 2025).

Atlas of Diseases of the Nail [PDF] | Portal Saude Direta. Retrieved from: https://www.saudedireta.com.br/catinc/tools/e_books/An_Atlas_of_Diseases_of_the_Nail.pdf (date accessed: October 13, 2025).

Code of Practice – Nail Services [PDF]. Retrieved from: https://www.ardsandnorthdown.gov.uk/media/1135/Code-of-Practice-for-Nail-Services/pdf/k6Code_of_Practice_for_Nail_Services.pdf?m=1710506518157 (date accessed: October 14, 2025).

Nailympia 2025 Scoresheet – Salon Nails Poster [PDF]. Retrieved from: https://www.nailympia.com/wp-content/uploads/2025/02/Nailympia-2025-Scoresheet_Salon-Nails-Poster.pdf (date accessed: October 15, 2025).

Online OMC Ukraine (SPU) Nail Aesthetics Championship [PDF]. Retrieved from: https://spu-ua.com/rules2025/nails%20online%202025%20en.pdf (date accessed: October 16, 2025).

Milbar, H., et al. (2022). Acute paronychia and onychomadesis after a “Russian” manicure. Skin Appendage Disorders.https://doi.org/10.1159/000525023

Bellinato, F., Gisondi, P., Filippucci, E., Tozzi, F., Fassio, A., Adami, G., & Idolazzi, L. (2023). Systematic study on nail plate assessment: Differences in nail plate shape, thickness, power Doppler signal and scanning approach. Archives of Dermatological Research, 315(3), 593–600. https://doi.org/10.1007/s00403-022-02404-5

How to Prep Nails by E-File | OPI. Retrieved from: https://www.opi.com/professionals/how-to-prep-nails-for-application-by-efile (date accessed: October 19, 2025).

Nail Salon Industry Report 2025: Market Overview, Trends & Competitive Landscape | The Business Research Company. Retrieved from: https://www.thebusinessresearchcompany.com/market-insights/nail-salon-market-insights-2025 (date accessed: November 5, 2025).

Nail Salon Market Report 2025 | Research and Markets. Retrieved from: https://www.researchandmarkets.com/reports/6089843/nail-salon-market-report (date accessed: November 6, 2025).

Nail Care Services Market Size, Share | CAGR of 7.7% | Market.us. Retrieved from: https://market.us/report/nail-care-services-market/ (date accessed: November 7, 2025).

Nail terminology | DermNet. Retrieved from: https://dermnetnz.org/topics/nail-terminology (date accessed: November 8, 2025).

What’s New in Nail Anatomy? Pterygium: What and Where is It? | Schoon Scientific. Retrieved from: https://schoonscientific.com/2020/whats-new-in-nail-anatomy-pterygium-what-and-where-is-it/ (date accessed: November 9, 2025).

Reinecke, J. K., & Hinshaw, M. A. (2020). Nail health in women. International Journal of Women’s Dermatology, 6(2), 73–79. https://doi.org/10.1016/j.ijwd.2020.01.006

Maintain and finish nail overlays using an electric file (SQA Unit Code HF9K 04) [PDF]. Retrieved from: https://www.sqa.org.uk/files/aq/HF9K04.pdf (date accessed: November 11, 2025).

Nail damage from gel polish manicure [PDF]. Retrieved from: https://assets1.cbsnewsstatic.com/i/cbslocal/wp-content/uploads/sites/15116062/2012/07/damage-from-gel-polish-article.pdf (date accessed: November 12, 2025).

Overlooked and Unprotected: Nail Salon Workers Face Many Hazards | The Synergist (AIHA). Retrieved from: https://publications.aiha.org/202310-nail-salon-workers (date accessed: December 1, 2025).

Classic Pterygium | Patient Care Online. Retrieved from: https://www.patientcareonline.com/view/classic-pterygium(date accessed: December 2, 2025).

Code of Practice 1b: Artificial nail treatments [PDF] | London Borough of Hillingdon. Retrieved from: https://www.hillingdon.gov.uk/media/5405/Code-of-Practice-1b-Artificial-nail-treatments-factfile/pdf/2rxxxxx_Code_of_Practice_1b_Artificial_nail_treatments_factfile_087_draft.pdf?m=1615287929150 (date accessed: December 3, 2025).

SHBBNLS011 Use electric file equipment for nail services [PDF]. Retrieved from: https://training.gov.au/TrainingComponentFiles/SHB/SHBBNLS011_R1.pdf (date accessed: December 4, 2025).

A New Manicure Table for Applying Artificial Fingernails [PDF]. Retrieved from: https://stacks.cdc.gov/view/cdc/198401/cdc_198401_DS1.pdf (date accessed: December 5, 2025).