1Shahad Mohammed Shakir BSc, 2Saja Ali Muhsin, PhD and 3Raad Al Marza,PhD 1, 2 Middle Technical University, College of Health and Medical Techniques, Baghdad, Iraq. 3The University of Sheffield, School of Clinical Dentistry, Sheffield, UK.
Corresponding author: Saja Ali Muhsin
E. mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received 12 December 2022.
Accepted for publication on February 25, 2023.
Published April 27, 2023.
Doi: https://doi.org/10.58827/308487mcqkat
Abstract
Background The selection of implant-restorative components and mechanisms must be considered a critical factor for the long-term success of implant-supported prosthetics. To date, regarding monoimplant- supported single crowns, there is inadequate systematic data to support a single connecting system, and the decision remains controversial. Objectives In vitro current study aimed to compare the effect of two cement interface spaces of cement-retained mono-implant on the fracture load of the hybrid crown. Material and Methods Fourteen mono-implant abutments were attached and embedded in acrylic resin blocks. They were divided into two groups according to cement interface space of 80μm and 160μm (n=7). The full anatomical crown was milled using Vita Enamic® with a uniform cement space of 80μm and 160μm by Computer-aided design and computer-aided manufacturing (CAD/CAM) production method. The study data were statistically analyzed using the Student’s t-test, with a confidence interval of 95%. Results A statistically significant difference was noticed between the two groups (P≤0.05). In a cement space gap of 80μm, the mean fracture load value was 2179(±97)N. However, a mean value of 1814(±102)N was recorded in a cement space of 160μm. A significant increase was found in the hybrid crown with 80μm cement space. Conclusion Within the scope of this in vitro investigation, a stronger mono-implant hybrid crown was noticed with a cement space of 80μm than that of 160μm.
