The Fracture Strength of Ceramic Overlays with and without Immediate Dentin Sealing
Abstract
Same-day dentistry is gaining widespread adoption with the advent of digital dentistry. However, limited research is available evaluating whether the reported in vitro benefits of immediate dentin sealing (IDS) can be acquired in the era of same-day dentistry. The purpose of this study was to evaluate the fracture strength of ceramic overlays with an immediate dentin sealing (IDS) technique versus a delayed dentin sealing (DDS) technique performed under same-day (SD, 1-hour) or delayed (D, 2-week) delivery conditions. Forty maxillary third molars were prepared for a lithium-disilicate overlay restoration (IPS e.max CAD, Ivoclar) and divided into four groups of 10 teeth each. The preparations were scanned, and the restorations were designed, milled, and crystallized. In the first group, teeth were prepared, stored for an hour and then the adhesion protocol (bonding agent, resin cement) was applied at the time of delivery (SD,DDS). In the second group, teeth were prepared, the adhesive protocol was applied immediately, and then the teeth were stored for an hour before final delivery (SD, IDS).The protocols for the third (D, DDS) and fourth group (D, IDS) were identical to the first and second, respectively, however, the teeth were provisionalized and stored for two weeks. All specimens were subjected to thermocycling and cyclic loading before loading to failure in a universal-testing machine using a stainless-steel rod resting on the buccal incline of the palatal cusp at a 60-degree angle to the long axis of the tooth. Data were analyzed with a two-way ANOVA (alpha=0.05). No significant difference in fracture strength was found between the groups (p greater than 0.05). Immediate dentin sealing did not provide any significant increase in fracture strength of the overlay restorations compared to delayed dentin sealing, whether the restoration was delivered the same day or after two weeks of storage.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 2023
- Accession Number
- AD1222411
Entities
People
- Melissa N. Seibert
Organizations
- Uniformed Services University of the Health Sciences