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.

Advocacy practices among U. S. pediatric dentists.

Purpose: Advocacy is the primary mission of the American Academy of Pediatric Dentistry (AAPD), but members' participation in advocacy is not well known. The purpose of this study was to examine advocacy by AAPD members and their attitudes toward various advocacy-related activities.

Methods: An Internet-based questionnaire, e-mailed to 4,328 AAPD members via Survey Monkey, consisted of 19 questions on: demography; advocacy training; attitudes toward advocacy; and past, recent, and current advocacy practices.

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.

The comparative morbidities of acute dental pain and acute asthma on quality of life in children.

Purpose: The purpose of this prospective cross-section survey study was to examine the comparative burden of acute exacerbations of the two most common chronic illnesses of childhood: acute dental pain and acute asthma.

Methods: All patients came from one of three distinct clinics within Nationwide Children's Hospital, Columbus, Ohio: (1) outpatient dental clinic; (2) urgent medical care unit; or (3) emergency department. Caregivers were asked information about their child's condition and the impact on their daily function.

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.

Physiologic signs during dental treatment in overweight vs normal weight children.

Purpose: This study compared physiologic effects of position change on overweight (OW) and normal-weight (NW) children during a preventive appointment.

Methods: A cross-sectional, case-controlled design assigned a convenience sample to either overweight (>85th percentile) or normal-weight groups (25th to 85th percentile) by body mass index (BMI). A trained examiner measured blood pressure (BP), heart rate (HR), oxygen saturation (SpO2), and 5 pulmonary functions in preoperative, upright seated, supine, and postoperative upright seated positions.

Effect of home bleaching systems on enamel nanohardness and elastic modulus.

Objectives: The purpose of this study was to evaluate the nanohardness and elastic modulus of human enamel after treatment with tray and strip bleaching systems.

Methods: Fifty-five human enamel samples were exposed to five different bleaching agents. Nanoindentations were made before and after bleaching treatments following the manufacturer's directions using a Nanoindenter XP (MTS Systems Corporation, Oak Ridge, TN, USA).

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.

Comparison of peer assessment rating (PAR) index scores of plaster and computer-based digital models.

Introduction: The peer assessment rating (PAR) index is a valid and reliable tool for measuring malocclusion on plaster models, but it has not been shown to be valid and reliable when used to score computer-based digital models. The purpose of this study was to determine whether the PAR index is a valid and reliable measure on digital models.

Methods: The study sample consisted of 48 pairs of plaster and digital pretreatment models.

Comparison of strains produced by titanium and poly D, L-lactide Acid plating systems to in vitro forces.

Purpose: To determine if a specific resorbable plating system provides similar fixation, in terms of strain distribution under load, to a titanium system when the Champy technique is applied for the treatment of a mandibular angle fracture.

Materials And Methods: A formalin-fixed cadaver mandible was harvested just before the study. A bicortical osteotomy was then made using a diamond disc extending in an oblique direction in the area of the angle.

Bispectral EEG index monitoring of high-dose nitrous oxide and low-dose sevoflurane sedation.

This single-blind controlled clinical study characterized the effects of 30-70% nitrous oxide (N2O) and 0.2-0.8% sevoflurane conscious sedation on quantitative electroencephalographic (EEG) readings of 22 healthy dental students as measured by the bispectral index (BIS).

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.