Evaluation of clinical performance of additively manufactured and milled polyetheretherketone (PEEK) inlays compared with indirect composite resin inlays over a one-year follow-up: A randomized clinical trial.

Statement Of Problem: Data on polymer materials, particularly polyetheretherketone (PEEK) used in restorative dentistry, are scarce, as is knowledge concerning the clinical efficacy of PEEK restorations produced through additive manufacturing when compared with existing indirect materials and techniques.

Purpose: The purpose of this randomized clinical trial was to evaluate the clinical performance of additively manufactured and milled PEEK inlays compared with composite resin inlays according to modified United State Public Health Service (USPHS) criteria over a 1-year follow- up.

Material And Methods: Participants were allocated into 3 distinct categories based on the materials and techniques used: R1 denoting teeth restored with 3 dimensionally (3D) printed PEEK inlays (N=16), R2 representing teeth restored with milled PEEK inlays (N=16), and R3 indicating the comparator group comprising teeth restored with milled composite resin inlays (N=16).

The influence of scale-dependent geodiversity on species distribution models in a biodiversity hotspot.

Improving models of species' distributions is essential for conservation, especially in light of global change. Species distribution models (SDMs) often rely on mean environmental conditions, yet species distributions are also a function of environmental heterogeneity and filtering acting at multiple spatial scales. Geodiversity, which we define as the variation of abiotic features and processes of Earth's entire geosphere (inclusive of climate), has potential to improve SDMs and conservation assessments, as they capture multiple abiotic dimensions of species niches, however they have not been sufficiently tested in SDMs.

Effect of different sintering protocols on the fracture strength of 3-unit monolithic gradient zirconia fixed partial dentures: An in vitro study.

Statement Of Problem: Strength-gradient zirconia combining 3 zirconia formulations with different flexural strengths has been reported to have outstanding mechanical properties. However, data concerning the effect of different sintering protocols on the fracture strength of 3-unit monolithic gradient zirconia fixed partial dentures (FPDs) are sparse.

Purpose: The purpose of this in vitro study was to test the effect of different sintering protocols on the fracture strength of 3-unit monolithic gradient zirconia FPDs.

Micro-CT analysis of marginal and internal fit of milled and pressed polyetheretherketone single crowns.

Statement Of Problem: Polyetheretherketone (PEEK) has been increasingly used as a framework material in prosthetic dentistry. However, data on the marginal and internal fit of PEEK restorations fabricated by using either the computer-aided design and computer-aided manufacturing (CAD-CAM) or heat-pressing technique are sparse.

Purpose: The aim of this in vitro study was to assess the marginal and internal fit of milled and pressed PEEK single crowns by using microcomputed tomography (μCT).