Exploring the potential of machine learning models to predict nasal measurements through facial landmarks.

Statement Of Problem: Information on predicting the measurements of the nose from selected facial landmarks to assist in maxillofacial prosthodontics is lacking.

Purpose: The objective of this study was to identify the efficiency of machine learning models in predicting the length and width of the nose from selected facial landmarks.

Material And Methods: Two-dimensional frontal and lateral photographs were made of 100 men and 100 women.

Validity and reliability of a proposed anterior implant esthetic index (AIEI).

Statement Of Problem: Patient satisfaction and esthetic acceptance are important factors in predicting the success of implant therapy in the anterior maxilla. A standardized esthetic index to evaluate implant esthetic outcomes is still lacking.

Purpose: The purposes of this study were to describe the newly developed images that correlate to the pink esthetic score and white esthetic score (PES/WES) for improved standardized documentation and to evaluate the validity and reliability of the proposed anterior implant esthetic index (AIEI) with patient satisfaction scores.

Profile of prosthodontics program directors in North America.

Purpose: To develop a current profile of prosthodontics program directors (PPDs) in United States dental schools and describe the current challenges and responsibilities of those serving in the position and assess the professional needs of the program directors (PDs) to better support them in their roles.

Materials And Methods: A survey was sent to 51 participants who were identified as PPDs in North America via Qualtrics in 2019 to assess the professional needs of PDs to better support their roles. The survey consisted of 29 items organized into six sections: (1) demographic information; (2) hours and time spent in various areas of the job; (3) greatest challenges; (4) perceived importance of specific competencies; (5) opinions on the greatest rewards of the position; (6) their needs for support from the American College of Prosthodontists and advice for the future PD.

Viscoelastic Properties of Human Facial Skin and Comparisons with Facial Prosthetic Elastomers.

Prosthesis discomfort and a lack of skin-like quality is a source of patient dissatisfaction with facial prostheses. To engineer skin-like replacements, knowledge of the differences between facial skin properties and those for prosthetic materials is essential. This project measured six viscoelastic properties (percent laxity, stiffness, elastic deformation, creep, absorbed energy, and percent elasticity) at six facial locations with a suction device in a human adult population equally stratified for age, sex, and race.

Effect of Nano Ceramic Coating on Color Perceptibility and Acceptability of Polymethylmethacrylate: In Vitro and Clinical Study.

The effect of a novel nano-ceramic coating (TiO) using an atomic layer deposition (ALD) technique on the surface of polymethyl methacrylate (PMMA) material was investigated. The patients' and clinicians' perception and acceptance of the PMMA color with TiO coating were also examined. In vitro color measurement was performed on thirty specimens (light, original, and dark pink) before and after TiO coating.

The Effect of Smoking and Brushing on the Color Stability and Stainability of Different CAD/CAM Restorative Materials.

This study aimed to investigate and compare the color stability and stainability of computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials in their glazed (G) and polished (P) state when exposed to cigarette smoke, as well as after brushing. Three CAD/CAM restorative materials were investigated: lithium disilicate CAD (LD), zirconia (Zr), and Telio PMMA CAD (PMMA), according to their surface finishing and assignment to cigarette smoking exposure or soaking in the saliva (control) group. The color change (∆E) was calculated before and after the intervention performed for all specimens, using the L*a*b values to quantitatively assess the shade differences.

Validation of two clinical color measuring instruments for use in dental research.

Objective: There are several shade matching instruments developed for clinical use, but the validity of their use in dental research has not been thoroughly investigated. The objective of this study is to evaluate the accuracy of using two clinical color measuring instruments, VitaEasyshade and Spectroshade, against a referent laboratory color measuring instrument (Spectroradiometer PR670).

Methods And Materials: The validity and repeatability of the referent laboratory color measuring instrument was assessed using standard color patches with certified CIE L*a*b* values.

Color and translucency of enamel in vital maxillary central incisors.

Statement Of Problem: Limited data, especially in vivo data, exist regarding translucency parameter (TP) values for vital anterior nonrestored dentition. Additionally, published information on the CIELab values of vital enamel at a theoretical infinite thickness is lacking. Obtaining TP and CIELab values in a population that varies in terms of ethnicity, age, and sex would be useful to inform the development and placement of esthetic dental restorations that more accurately capture the complex optical qualities of enamel.

Mathematical Tooth Proportions: A Systematic Review.

Purpose: The aim of this systematic review was to evaluate and compare three commonly used proportions that include the golden proportion, golden percentage, and Recurring Esthetic Dental (RED) proportion to identify which of the mathematical formulas, if any, can be used to provide predictable and repeatable esthetic clinical outcomes.

Methods: A comprehensive search of electronic databases that included EBSCO, ProQuest, SCOPUS, Science Direct, Wiley, Google Scholar and PubMed was conducted using the terms: "golden proportion," "golden percentage," and "Recurring Esthetic Dental (RED) proportions" alone or in concurrence with one or both ensuing terms: "tooth proportions" and "esthetic tooth proportions." In addition, the following journals were hand searched for relevant articles: Journal of Prosthodontics, Journal of Prosthetic Dentistry and Journal of Esthetic and Restorative Dentistry.

Management of intraoral stents for radiotherapy during COVID-19 pandemic.

Radiotherapy is being performed in many situations as a curative approach for head and neck cancer instead of surgery due to the current novel coronavirus disease (COVID-19) pandemic. A recent publication reported that even hypofractionation was being conducted in order to reduce the daily exposure of both patients and the medical staff involved in cancer therapies. As a result, dental teams may be requested more frequently than usual to fabricate intraoral stents (IOS).

Three-Dimensional Accuracy of Conventional Versus Digital Complete Arch Implant Impressions.

Purpose: The accuracy of digital impressions is still controversial for complete arch implant cases. The aim of this study is to compare the accuracy of different intraoral scanners with the conventional technique in terms of trueness and precision in a complete arch implant model.

Material And Methods: Eight implants were inserted asymmetrically in a polyurethane edentulous mandibular model with different angulations.

Status of Sleep Apnea and Snoring Disorder Curriculum in U.S. Advanced Education Prosthodontic Programs.

Purpose: To assess the management of sleep apnea and snoring disorders in Advanced Education Programs in Prosthodontics (AEPP) in the United States.

Materials And Methods: A 51 item, online survey was sent to program directors at 48 AEPPs in the United States in 2015. Data results were analyzed descriptively.

Prosthodontic Resident Selection by Postdoctoral Dental Matching Program: A National Survey by Participating Program Director.

Purpose: The purpose of this study was to obtain information about the resident selection and Match process that occurred for the Commission on Dental Accreditation (CODA)-accredited Advanced Education in Prosthodontics program in North America from the program directors' perspective, after the first year of implementation.

Materials And Methods: The list of Advanced Education in Prosthodontics program in CODA-accredited North American institutions was obtained from the ACP central office, and the directors of each program were identified. The surveys were distributed to 48 program directors online and results were compiled.

Long-term stainability of interim prosthetic materials in acidic/staining solutions.

Objective: To evaluate the long-term color stainability, translucency, and contrast ratio (CR) of different resins used to fabricate interim prostheses after immersion in acidic/staining solutions.

Materials And Methods: A total of 160 specimens were divided into 16 groups (n = 10) according to the material (heat-polymerized acrylic resin [HPAR], auto-polymerized acrylic resin [APR], nanoparticulated bis-acrylic resin [BR], and prefabricated poly(methyl methacrylate) block for CAD/CAM [CADR]) and immersion solutions (artificial saliva, cola beverage, coffee, and red wine). A spectrophotometer was used before and after each immersion period (7, 14, 28, 90, and 180 days).

Predoctoral Dental Education in Tooth Prognosis and Treatment Complexity: A Survey of U.S. Dental Schools.

The aim of this study was to determine the educational methods and tools used to teach tooth prognosis and treatment complexity determination in U.S. predoctoral dental programs.

Retrospective Evaluation of the Status of Advanced Dental Education in Prosthodontics from 2006 to 2016.

The aim of this study was to analyze information about advanced education programs in prosthodontics (AEPPs) collected in American Dental Association (ADA) surveys on advanced dental education from 2006-07 to 2016-17. Data recorded included number of AEPPs and information on program directors, applicants, and enrollees in AEPPs. The results showed that, from 2006 to 2016, there was an increase in the number of AEPPs and enrollment of prosthodontic residents, and the number of applicants per program more than doubled.

Accuracy of complete-arch implant impression made with occlusal registration material.

Statement Of Problem: Which impression material, impression tray type, and implant impression technique combination produces the most accurate complete-arch impression is unclear.

Purpose: The purpose of this in vitro study was to compare the implant impression accuracy of a completely edentulous arch made with addition silicone occlusal registration material and an open tray with the implant impression accuracy of other conventional impression techniques.

Material And Methods: A master cast was fabricated from Type IV gypsum with four 3.

Qualifications and Characteristics North American Dental Deans Seek in Department Chairpersons.

The aim of this study was to determine whether deans of North American dental schools perceived that one category of department chairperson skills (leadership or management) was more important than the other for their chairpersons to be successful. A secondary purpose was to determine the professional qualifications and personal characteristics these deans perceived contributed most to the success of department chairpersons and whether those differed by the research emphasis of the school. An email survey was sent in 2016 to all 75 deans of U.

U.S. Maxillofacial Prosthetics Programs: Fellows' and Directors' Perspectives.

Maxillofacial prosthetics (MFP) programs in the U.S. select only a limited number of applicants for fellowship positions.

Research Productivity of Directors of U.S. Advanced Education in Prosthodontics Programs.

The aims of this study were to measure the research productivity of directors of U.S. advanced education in prosthodontics programs (AEPP) and to identify associations between the directors' publication metrics and professional characteristics.

Color stability of maxillofacial prosthetic silicone functionalized with oxide nanocoating.

Statement Of Problem: Maxillofacial prostheses made of silicone elastomers undergo undesirable color degradation over time. How this color change can be prevented is unclear.

Purpose: The purpose of this in vitro study was to evaluate the ability of an oxide nanocoating to prevent color degradation of maxillofacial silicone elastomers after artificial accelerated aging.

Wear Characteristics and Volume Loss of CAD/CAM Ceramic Materials.

Purpose: In the field of prosthodontics, patients often require complex and extensive restorative care. This can involve the use of dental restorations to restore teeth on both the maxillary and mandibular arch. Current literature has evaluated the wear properties of different dental ceramics against enamel, but studies regarding dental ceramics opposing one another are limited.

Effect of brushing and thermocycling on the shade and surface roughness of CAD-CAM ceramic restorations.

Statement Of Problem: The effects of toothbrushing (B) and thermocycling (TC) on the surface texture of different materials with various fabrication processes have been investigated. However, studies of computer-aided design and computer-aided manufacturing (CAD-CAM) ceramic restorations are limited.

Purpose: The purpose of this in vitro study was to evaluate the effect of B and TC on the color stability and surface roughness of extrinsically characterized and glazed CAD-CAM ceramic restorations.