Auto-Segmentation and Quantification of Non-Cavitated Enamel Caries Imaged with Swept-Source Optical Coherence Tomography.

(1) Background: OCT imaging has been used to assess enamel demineralization in dental research, but it is not yet developed enough to qualify as a diagnostic technique in clinics. The current capabilities of most commercial acquisition software allow for visual and qualitative assessments. There is a need for a fast and verified batch-processing algorithm to segment and analyze demineralized enamel.

Resident selection, assessment, and management: Proceedings of the 2022 ADEA Advanced Dental Education Summit.

The fifth biennial Advanced Dental Education Summit was organized by the ADEA Council on Advanced Education Programs. With a focus on "Resident selection, assessment, and management," the summit aimed to discuss best practices for selecting, assessing, and managing advanced education residents. Expert presentations covered the resident's journey from interview to graduation, emphasizing strategies for supporting resident wellness, success, and evaluation.

Dental Utilization in a Pediatric Emergency Department and Urgent Care Centers Before, During, and After Shutdown of a Pediatric Dental Clinic During the COVID-19 Pandemic, 2019-2021.

Objectives: Limited data are available on how the closure of pediatric dental clinics because of the COVID-19 pandemic affected hospital pediatric emergency department (ED) visits in the United States. We evaluated changes in dental-related visits at a pediatric ED and associated urgent care centers (UCCs) after the shutdown of a large pediatric dental clinic because of the COVID-19 pandemic.

Methods: We conducted a single-center retrospective medical record review of 811 patients aged 0 to 17 years who presented to a pediatric ED or associated UCC at Rady Children's Hospital-San Diego for dental-related concerns from March 19, 2019, through January 17, 2021.

Displacement of a Dental Implant into the Pterygoid Fossa: A Clinical Report.

The placement of dental implants in the pterygomaxillary region can be advantageous in maxillary complete arch fixed implant-supported prosthetic rehabilitations to avoid bone grafting and sinus elevation surgeries. Pterygomaxillary implants improve implant biomechanics by eliminating distal cantilevers and increasing the anteroposterior spread with reported mean implant survival rates comparable to traditional implant sites. Although only minor surgical complications have been reported in the literature with the placement of dental implants in the pterygomaxillary region this clinical report describes a major surgical complication involving the displacement of a dental implant into the pterygoid fossa.

Clinical and microbiologic investigation of an expedited peri-implantitis dog model: an animal study.

Background: Animal studies are pivotal in allowing experimentation to identify efficacious treatment protocols for resolution of peri-implantitis. The purpose of this investigation was to characterize an expedited dog peri-implantitis model clinically, radiographically, and microbiologically.

Methods: Eight hound dogs underwent extractions (week 0) and implant (3.

A Specialized Pediatric Emergency Medicine Track Decreases Computed Tomography in Head Injured Patients.

Background: There is an increased emphasis on reducing exposure to ionizing radiation in pediatric patients. Guidelines from the Pediatric Emergency Care Applied Research Network help practitioners identify patients at low risk for clinically important traumatic brain injury after head injury.

Objectives: We seek to determine whether the institution of a pediatric track staffed by pediatric emergency medicine physicians (PEMs) within a community emergency department (ED) impacts the overall utilization of head computed tomography (CT) on children younger than 15 years with head injury.

The Impact of Behavioral Health Patients on a Pediatric Emergency Department's Length of Stay and Left Without Being Seen.

Objective: Emergency department (ED) boarding of admitted patients negatively impacts ED length of stay (LOS). Behavioral health (BH) patients are often challenging to safely discharge. We examined the association between daily BH census and non-BH LOS and left without being seen (LWBS) rates.

Postmortem evaluation of mandibular implant-supported fixed complete denture after 30 years of service.

A postmortem evaluation of a 5-implant-supported mandibular fixed complete denture that had successfully opposed a maxillary conventional complete denture for 30 years was undertaken. Before embalming, radiographs, implant stability measurements, push-in failure load tests, and histomorphometric analyses were performed on the implants and the mandible. Evaluation of this cadaver suggests that an edentulous mandible restored with an implant-supported fixed prosthesis can function successfully for over 30 years with few complications.

Comparison of the correlation of photoelasticity and digital imaging to characterize the load transfer of implant-supported restorations.

Statement Of Problem: Whether splinting or not splinting adjacent implants together can optimize the stress/strain transfer to the supporting structures remains controversial.

Purpose: The purpose of this study was to compare the photoelasticity and digital image correlation (DIC) in analyzing the stresses/strains transferred by an implant-supported prosthesis.

Material And Methods: A polymethylmethacrylate model was made with a combination of acrylic resin replicas of a mandibular first premolar and second molar and threaded implants replacing the second premolar and first molar.

Validation of finite element models for strain analysis of implant-supported prostheses using digital image correlation.

Objectives: A validated numerical model for stress/strain predictions is essential in understanding the biomechanical behavior of implant-supported dental prostheses. The digital image correlation (DIC) method for full-field strain measurement was compared with finite element analysis (FEA) in assessing bone strain induced by implants.

Methods: An epoxy resin model simulating the lower arch was made for the experimental test with acrylic resin replicas of the first premolar and second molar and threaded implants replacing the second premolar and first molar.

Comparison of push-in versus pull-out tests on bone-implant interfaces of rabbit tibia dental implant healing model.

Purpose: This study aimed to investigate whether push-in and pull-out tests measure mechanical properties of the bone-implant interface differently, and which test is more sensitive to changes over the healing period.

Materials And Methods: Two identical self-threading dental implants (3.3×8.

Dental students choosing licensure path give more consideration to career flexibility rather than ethical dilemmas.

Although a patient-based clinical licensure examination (CLE) has been used in the United States for many decades to evaluate an individual's competency to practice dentistry, there continue to be validity, reliability, and ethical issues of concern to the profession. As a result of a 2009 decision by the Minnesota Board of Dentistry, dental students from the University of Minnesota School of Dentistry, beginning with the Class of 2010, are eligible for initial licensure in Minnesota by passing the nonpatient-based National Dental Examining Board of Canada Examination. Surveys were distributed to 101 senior dental students to assess what factors students used to decide whether or not to register for a patient-based CLE.

Digital image correlation analysis on the influence of crown material in implant-supported prostheses on bone strain distribution.

Purpose: A digital image correlation (DIC) method for full-field surface strain measurement was used to analyze the effect of two veneering materials for implant supported crowns on the strain distribution within the surrounding bone.

Methods: An epoxy resin model of a bone block was made by housing acrylic resin replicas of a mandibular first premolar and second molar together with threaded implants replacing the second premolar and first molar. Porcelain-veneered (G1 and G3) and resin-veneered (G2 and G4) screw-retained splinted crowns were fabricated and loaded with (G1 and G2) and without (G3 and G4) the presence of the second molar replica.

Prevalence of sinus augmentation associated with maxillary posterior implants.

Pneumatization of the maxillary sinus limits the quantity of alveolar bone available for implant placement and may result in a lack of primary stability and difficulty in achieving osseointegration. The purpose of this study was to retrospectively analyze a group of patients who had implants placed in the posterior maxilla, calculate the prevalence of sinus augmentation, and identify factors related to sinus augmentation. With institutional review board approval, dental records from a population of patients who had implants placed in the maxillary posterior region between January 2000 and December 2004 were used to create a database.

Digital image correlation analysis of the load transfer by implant-supported restorations.

This study compared splinted and non-splinted implant-supported prosthesis with and without a distal proximal contact using a digital image correlation method. An epoxy resin model was made with acrylic resin replicas of a mandibular first premolar and second molar and with threaded implants replacing the second premolar and first molar. Splinted and non-splinted metal-ceramic screw-retained crowns were fabricated and loaded with and without the presence of the second molar.

Retrospective cohort study of the predictors of implant failure in the posterior maxilla.

Purpose: The purpose of this study was to retrospectively analyze a cohort of patients who had implants placed in the posterior maxilla and assess and identify the predictors of implant failure.

Materials And Methods: With institutional review board approval, dental records from a population of patients who had maxillary posterior implants placed were used to create a database. Independent variables were divided into continuous (age of the patient at stage-one implant surgery [S1], time between extraction and S1, time between extraction and sinus augmentation, time between sinus augmentation and S1, time between S1 and stage-two implant surgery [S2], and the time between S2 and restoration of the implant) and categorical (gender, American Society of Anesthesiologists [ASA] status, current smoking status, implant position, implant proximity, residual crestal bone height, implant length and diameter, and sinus augmentation technique and materials).

Effect of surgical guide design and surgeon's experience on the accuracy of implant placement.

Implant position is a key determinant of esthetic and functional success. Achieving the goal of ideal implant position may be affected by case selection, prosthodontically driven treatment planning, site preparation, surgeon's experience and use of a surgical guide. The combined effect of surgical guide design, surgeon's experience, and size of the edentulous area on the accuracy of implant placement was evaluated in a simulated clinical setting.

Potential damage to bone-implant interface when measuring initial implant stability.

Background: An electronically controlled mechanical tapping device (MTD) to measure implant stability has been studied extensively for its ability to measure initial stability at the time of surgical placement and predict an implant's survival prognosis, with few reported complications.

Methods: Initial stability data, measured repeatedly with a resonance frequency analysis device and the MTD, for seven of 28 implants placed in jawbones of four fresh human cadavers and the histologic images of bone-implant interfaces are presented as evidence for potential damage to the bone-implant interface using these techniques.

Results: A progressive increase in mobility from stable (-1) to less stable (4) and eventually to visibly mobile (999) was observed after three measurements with the MTD.

Internalized discoloration of dentin under porcelain crowns: a clinical report.

This clinical report describes the situation of a patient who was concerned about the appearance of porcelain crowns that were placed on the maxillary incisors 4 years prior. The mechanicochemical gingival retraction technique combining the use of ferric sulfate and knitted retraction cord is described as a possible etiology of internalized discoloration of the dentin in this situation. The hypothesis is explained by the high acidity of gingival retraction fluids (GRFs) and the high affinity of iron for hard tooth tissues, resulting in an interaction with bacterial byproducts and precipitation of insoluble ferric sulfide in the porous demineralized dentin.

Accuracy of friction-style and spring-style mechanical torque limiting devices for dental implants.

Statement Of Problem: Accurate delivery of torque to implant prosthetic screws is critical to generate ideal preload in the screw joint and offer protection against screw loosening. Mechanical torque limiting devices (MTLDs) are available in 2 different styles that have not been compared for accuracy.

Purpose: The purpose of this study was to determine the accuracy of friction-style and spring-style MTLDs in delivering target torque values.