Sikri’s Magnetic Attachment Retained Two-Tray (SMART) impression technique for prosthodontic management of a knife-edge residual ridge: a case report

Arpit Sikri; Jyotsana Sikri; Rekha Thiruvengadam; Muthu Thiruvengadam

doi:10.2340/biid.v13.46765

Authors

Arpit Sikri Department of Prosthodontics and Crown & Bridge, Punjab Government Dental College and Hospital, Amritsar, Punjab, India
Jyotsana Sikri Department of Conservative Dentistry & Endodontics, Bhojia Dental College & Hospital, Budh (Baddi), Teh. Baddi, Distt. Solan, Himachal Pradesh, India
Rekha Thiruvengadam Microbiology and Infectious Diseases - Helix Research Lab, Department of Neonatology, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, India, Chennai, 602105, India
Muthu Thiruvengadam Department of Applied Bioscience, College of Life and Environmental Science, Konkuk University, Seoul, Republic of Korea

DOI:

https://doi.org/10.2340/biid.v13.46765

Keywords:

Dual tray, knife-edge ridge, magnetically retained custom tray, modified custom tray, mucostatic impression, sharp residual ridge, Sikri’s technique, SMART tray impression technique, split tray, thin ridge

Abstract

Background: Mandibular knife-edge residual ridges present a significant challenge during complete denture impression making because of their narrow morphology and susceptibility to tissue distortion under pressure. This report describes the clinical application of the novel Sikri’s Magnetic Attachment Retained Two-Tray (SMART) impression technique, conceptualized, developed, and patented by Dr. Arpit Sikri (Patent/ROC No. L-156844/2024), for obtaining an accurate mucostatic impression of a mandibular knife-edge residual ridge without the application of manual finger pressure. The SMART technique employs a magnetically retained split custom tray design that facilitates pressure-free tray stabilization and precise impression making in anatomically challenging mandibular residual ridges.

Materials and Methods: A completely edentulous patient with a pronounced knife-edge residual ridge in the anterior mandible was rehabilitated using the SMART impression technique. A custom-designed split two-part impression tray incorporating magnetic attachments for self-retention and retentive holes for impression material retention was fabricated. Magnetic attraction between the tray components ensured stable and reproducible tray positioning throughout the impression procedure, eliminating the need for operator-applied finger pressure and facilitating a pressure-free mucostatic impression of the residual ridge.

Results: The SMART technique enabled accurate recording of the mandibular residual ridge anatomy without observable tissue displacement during impression making. The definitive impression produced a well-adapted master cast, resulting in a complete denture with satisfactory retention, stability, adaptation, and patient comfort during clinical evaluation.

Conclusion: The SMART impression technique represents a simple, innovative, and clinically applicable approach for the prosthodontic management of mandibular knife-edge residual ridge. By eliminating manual tray stabilization and minimizing tissue displacement during impression making, it facilitates accurate mucostatic impressions and may improve denture fit, stability, and overall clinical performance. Further clinical studies involving larger patient populations are required to evaluate its reproducibility and long-term clinical effectiveness.

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