Celebrity smile esthetics assessment: Smile angulation.

Statement Of Problem: Whether deviations in the angulation discrepancy between the intercanine and interpupillary line significantly affect attractiveness is unknown.

Purpose: The purpose of this prospective study was to quantify dental and facial esthetics to determine whether smile angulation discrepancies in individuals identified as having attractive smiles are smaller than those in the average population.

Material And Methods: An Internet search for "best smile" and "celebrity" identified 108 celebrities (Test group).

Split-Mouth Comparison of Splinted and Nonsplinted Prostheses on Short Implants: 3-Year Results.

Purpose: To compare splinted and individual restorations supported by short implants featuring an internal connection utilizing a split-mouth design.

Materials And Methods: Splinted and nonsplinted implant crowns were prospectively compared in 18 patients. After verifying the need for at least two consecutive implants bilaterally, computed tomography scans were made, virtual planning was done, and qualifying patients were enrolled.

Influence of dowel type on push-out bond strength to regional root canal dentin.

Purpose: To compare the laboratory bond strengths of three different types of fiber-reinforced composite dowel systems in three different locations of prepared root canal dentin.

Methods: 60 human extracted intact upper central incisors were selected. The coronal aspect of each tooth was removed, and the remaining root received endodontic therapy.

Comparison of propofol-remifentanil versus propofol-ketamine deep sedation for third molar surgery.

This study aimed to compare continuous intravenous infusion combinations of propofol-remifentanil and propofol-ketamine for deep sedation for surgical extraction of all 4 third molars. In a prospective, randomized, double-blinded controlled study, participants received 1 of 2 sedative combinations for deep sedation for the surgery. Both groups initially received midazolam 0.

Contribution of dentist anesthesiologists to dental anesthesiology research.

In order to determine if dentist anesthesiologists (DAs) actively contribute to research in the field of anesthesiology, and thus contribute new knowledge to the field, an extensive literature search was accomplished. DAs make up only 1.5% of dentists who actively contribute to anesthesia research but account for 10% of publications.

Parker flex-tip and standard-tip endotracheal tubes: a comparison during nasotracheal intubation.

The placement of endotracheal tubes in the airway, particularly through the nose, can cause trauma. Their design might be an important etiologic factor, but they have changed little since their introduction. Recently Parker Medical (Bridgewater, Conn) introduced the Parker Flex-Tip (PFT) tube, suggesting that it causes less trauma.

Smile arcs of Caucasian and Korean youth.

This study was designed to measure and compare the smile arcs (tooth and lip arcs) of young Caucasian and Korean subjects. Two hundred subjects (100 male and 100 female) were selected from Caucasian and Korean students. Class photographs taken with a digital camera showing the subjects with a posed smile were used for this study.

Quantification of the esthetics of dentists' before and after photographs.

Purpose: The purpose of this study was to measure dentists' before and after restorative treatment photographs to identify four metrics to describe the esthetic improvement: (a) central incisor width-to-height ratio; (b) central-to-lateral incisor width ratio; (c) lateral incisor-to-canine width ratio; and (d) lateral incisor percentage offset.

Materials And Methods: Internet searches for "before after" and "veneers" and "prosthodontic" were used to obtain 198 before and after photographs of patient treatments showing the restoration of the six maxillary anterior teeth with porcelain veneers, crowns or a combination. The four metrics were measured using Adobe Photoshop.

Impact energy absorption of three mouthguard materials in an aqueous environment.

High impact energy absorption is an essential property for mouthguard materials. The impact test performance of three popular mouthguard materials was evaluated, using the procedure in American Society for Testing and Materials (ASTM) Standard D3763. Conventional ethylene vinyl acetate (EVA; T&S Dental and Plastics, Myerstown, PA, USA) served as the control.

Instruction in dental curricula to identify and assist domestic violence victims.

Since most domestic violence injuries occur in the head and neck areas, it is critical that dental professionals be prepared to identify, interview, and assist potential victims. The purposes of these surveys in 1996 and 2007 were to investigate U.S.

Evaluation of the safety and efficacy of an automated flossing device: a randomized controlled trial.

Objective: To evaluate the safety and efficacy of a newly developed automated flossing device (AF).

Methodology: Subjects were recruited from a university campus via announcements, and were randomly assigned to a control (C), manual (M), or automated (A) group. Subjects brushed twice a day and treatment groups used their respective floss daily.

Differential scanning calorimetry (DSC) and temperature-modulated DSC study of three mouthguard materials.

Objectives: Employ differential scanning calorimetry (DSC) and temperature-modulated DSC (TMDSC) to investigate thermal transformations in three mouthguard materials and provide insight into their previously investigated energy absorption.

Methods: Samples (13-21mg) were obtained from (a) conventional ethylene vinyl acetate (EVA), (b) Pro-form, another EVA polymer, and (c) PolyShok, an EVA polymer containing polyurethane. Conventional DSC (n=5) was first performed from -80 to 150 degrees C at a heating rate of 10 degrees C/min to determine the temperature range for structural transformations.

The accuracy and reliability of measurements made on computer-based digital models.

For reasons of convenience and economy, orthodontists who routinely use and maintain pre- and posttreatment plaster casts are beginning to use computer-based digital models. The purpose of this study was to determine the accuracy (validity), reproducibility (reliability), efficacy, and effectiveness of measurements made on computer-based models. A plastic model occlusion ie, dentoform, served as a gold standard to evaluate the systematic errors associated with producing either plaster or computer-based models.

Dentists' molar restoration choices and longevity: a web-based survey.

Statement Of Problem: The increasing trend toward esthetics has led to controversy as to the longevity of esthetic restorations and the wisdom of having traditional restorations replaced for esthetic reasons. With the assumption that the way dentists treat their own teeth may be a good indication of the accumulated wisdom of the profession, knowledge of dentists' own restorative choices may provide guidance in selecting the most appropriate restorations.

Purpose: The purpose of this article was to determine restorative choices of dentists for personal molars and estimate restoration longevity.

Preference and compliance of waterless hand-hygiene products versus soap and water.

Purpose: To compare handwashing using traditional antimicrobial soap and water with two antimicrobial waterless hand-hygiene products for personal preference and compliance.

Methods: Fifty dental and dental hygiene students were randomly chosen to participate in the study. All subjects were anonymously observed prior to the introduction of the waterless products for handwashing compliance using soap and water for 1 week.

Postcementation hypersensitivity: scientific data versus dentists' perceptions.

Purpose: The purpose of this article was to obtain dentists' opinions via an Internet survey as to the prevalence, causes, and prevention of postcementation sensitivity and compare their responses with published data on the problem.

Materials And Methods: Information as to respondents opinions of postcementation sensitivity was obtained from an Internet survey asking about their experience and for a ranking of the importance of each of 15 factors.

Results: A total of 466 valid responses were received.

Public preferences for anterior tooth variations: a web-based study.

Purpose: This study was undertaken to determine the public's preferences for five esthetic variations, with the goal of linking preferences to demographic data such as age, gender, country of residence, and race.

Materials And Methods: Using photo-editing software, five pairs of images with anterior tooth variations were put on a Web page with forms to collect demographic data and ranking of the image pairs. Opinions were solicited by sending out a large number of e-mails with a short study description and an invitation to access the Web page.

Low-level laser effect on neural regeneration in Gore-Tex tubes.

Purpose: The purpose of this investigation was to determine the effects of low-level laser (LLL) irradiation on neural regeneration in surgically created defects in the rabbit inferior alveolar nerve.

Study Design: Five adult female New Zealand White rabbits underwent bilateral exposure of the inferior alveolar nerve. A 6-mm segment of nerve was resected, and the nerve gap was repaired via entubulation by using a Gore-Tex conduit.