Prosthodontics and Prosthodontology Commons^™

Effect Of Margin Thickness And Cement Gap On The Fabrication And Fit Accuracy Of Additively Manufactured Crowns In Definitive Resins With Different Filler Content, Mustafa Borga Dönmez, Gülce Çakmak, Çiğdem Kahveci, Amir H. Nejat, Burak Yilmaz, Pinar Altinci

School of Dentistry Faculty Publications

PURPOSE: To evaluate how commercially available composite resins in varying filler content affect the fabrication and fit accuracy (trueness and precision) of additively manufactured (AM) definitive crowns with different margin thickness and cement gaps by comparing them to subtractively manufactured (SM) polymer-infiltrated ceramic crowns. MATERIALS AND METHODS: Two identical unprepared mandibular right first molars were prepared by an experienced prosthodontist for crowns with either 0.5 mm or 1.0 mm chamfer margins, verified using silicone indexes and a periodontal probe, and then digitized with an industrial-grade scanner. These scan files were used to design reference crowns with either 50-µm or 80-µm …

10-Minute Ebd: Digital Scans Or Conventional Impressions: Which Results In Better Crowns?, Laura Tsu Dds

The Journal of the Michigan Dental Association

This 10-Minute EBD column critically evaluates the outcomes of digital scans versus conventional impressions in fabricating single-unit crowns, focusing on factors such as marginal and internal fit. Employing a PICO question and a literature search pathway via PubMed, the analysis includes systematic reviews and meta-analyses. Findings suggest that crowns from digital scans generally exhibit clinically acceptable marginal and internal fit, often outperforming conventional impressions. However, heterogeneity in study samples and methodologies contributes to varied results. While digital scans meet the standard of care, ongoing research is essential for a comprehensive understanding of the evolving landscape in digital prosthodontics.

Immediate Provionalization Of Single Threaded Oxidized Implants On Maxillary Premolars Healed Sites: One-Year Study, Kiyotaka Umezu

Loma Linda University Electronic Theses, Dissertations & Projects

Osseointegrated endosseous implants have been widely used and become a predictable treatment option for completely and partially edentulous patients. The viability and predictability of this treatment modality have been supported with the high success rates in numerous studies. Clinical guideline requires a healing period of 3 to 6 months without functional loading to achieve osseointegration with machine surface implants. Therefore, numerous studies on immediately loaded implants have been conducted in an attempt to minimize or eliminate this healing period. The purpose of this study was to evaluate the success rate of the immediately provisionalized oxidized-surface implants in healed sites supporting …

A Methodology For The Determination Of The Relationship Between Quantitative Occlusal Forces And The Masticatory Muscles, William Melvin Taskey

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

Accuracy Of The Indirect Method Evaluated By Mercury Micromeasurement, Estol C. Pruett

Loma Linda University Electronic Theses, Dissertations & Projects

Although the indirect method for preparing dental castings has been in use for over forty-five years, very little information has appeared in dental literature relative to its accuracy. The development of a precise and quantitative method for determining the adaptation of wax patterns or castings was necessary before such an evaluation could be considered valid. It was felt the Mercury Micromeasurement test, devised in 1958 by Hollenback, should meet these requirements. A description of the test had been published. However, at the time the project was begun, no data had appeared in the literature.

In order to establish a standard …