Work

Loss of Tooth Structure After Successive Removal of Temporary Restorative Materials by Dental Students Between Endodontic Treatment Sessions: An In Vitro Study

Year: 2025

Type: article

Abstract: OBJECTIVE: The aim of this study was to evaluate the loss of tooth structure after the removal of temporary restorative materials between endodontic treatment sessions performed by undergraduate students. METHODS: Twenty human molar teeth underwent endodontic coronal access and were randomly divided into two groups. One group received a temporary restoration with zinc oxide and calcium sulfate-based temporary cement (ZNO) alone, while the other group was restored with a combination of zinc oxide and calcium sulfate-based cement at the base of the restoration, and conventional glass ionomer cement as the outer layer (GIC). Every week, four trained undergraduate dental students performed the coronal reopening of the teeth. The teeth were individually weighed after the coronal access and after each removal of the temporary restoration. This process was carried out for 4 weeks. After the fourth week, two specialists in restorative dentistry fully removed any remaining temporary materials and finished the cavity. RESULTS: The average tooth mass variation was calculated at each removal stage. Linear regression analysis was performed to assess the variation in tooth mass as a function of the interventions. The final percentage mass variation was -1.946 (±1.096) for the teeth restored with ZNO, and -1.841 (±0.918) for those restored with ZNO + GIC. Every temporary filling removal presented a negative variation in tooth mass of 0.37% for ZNO, and of 0.63% for teeth restored with ZNO + GIC, respectively. CONCLUSIONS: Successive removals of temporary restorative materials led to loss of dental structure. When comparing temporary restorations made with ZNO + GIC and ZNO, no differences in the lost mass were observed.

Source: European Journal Of Dental Education

DOI: 10.1111/eje.70083

Authors: Márcia Cunha, Andressa Galzer dos Santos, Roberto Zimmer, Fernanda Zanella Arruda, Guilherme Anziliero Arossi, Fernando Freitas Portella

Institutions: Universidade Feevale, University of Maryland, Baltimore

Language: English

Topic: Endodontics and Root Canal Treatments

Subfield: Oral Surgery

Field: Dentistry

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: hybrid

Estimated APC paid: $4,330