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Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
Published on: July 21, 2014
Recuperación conservadora de la cabeza de un tornillo de pilar de implante dañado mediante compuesto de impresión de
Josephine Flora A1, Rajkumar E2
1Senior Lecturer, Department of Prosthodontics, Indira Gandhi Institute of Dental Sciences, Sri Balaji Vidyapeeth, Pondicherry, India.
Abstract:
Abutment screw loosening is a common complication in single-implant restorations, and retrieval is often hindered by the risk of damaging the implant collar or by the unavailability of specialized kits. This article describes a straightforward, cost‑effective chairside technique that uses readily available modeling plastic impression compound to engage a damaged abutment-screw head and facilitate retrieval. After confirming loosening radiographically and cleaning the access, softened modeling plastic impression compound is loaded into the access hole; the hexagonal driver is coated with a separating medium and pressed into the softened material to create a hollow imprint. The driver is then reinserted to seat within the indentation, and a controlled anticlockwise rotation retrieves the damaged screw while preserving the implant's internal structure. The method can be integrated into conventional workflows and avoids reliance on expensive retrieval kits, offering a practical option when standard tools are unavailable. Limitations include dependence on the remaining screw-head geometry and lack of large‑scale validation; further clinical evaluation is recommended.

