Efficacy of a Virtual 3D Simulation-Based Digital Training Module for Building Dental Technology Students' Long-Term Competency in Removable Partial Denture Design: Prospective Cohort Study.

Background: Removable partial denture (RPD) design is crucial to long-term success in dental treatment, but shortcomings in RPD design training and competency acquisition among dental students have persisted for decades. Digital production is increasing in prevalence in stomatology, and a digital RPD (D-RPD) module, under the framework of the certified Objective Manipulative Skill Examination of Dental Technicians (OMEDT) system reported in our previous work, may improve on existing RPD training models for students.

Objective: We aimed to determine the efficacy of a virtual 3D simulation-based progressive digital training module for RPD design compared to traditional training.

Virtual and Interprofessional Objective Structured Clinical Examination in Dentistry and Dental Technology: Development and User Evaluations.

Background: Interprofessional education (IPE) facilitates interprofessional collaborative practice (IPCP) to encourage teamwork among dental care professionals and is increasingly becoming a part of training programs for dental and dental technology students. However, the focus of previous IPE and IPCP studies has largely been on subjective student and instructor perceptions without including objective assessments of collaborative practice as an outcome measure.

Objective: The purposes of this study were to develop the framework for a novel virtual and interprofessional objective structured clinical examination (viOSCE) applicable to dental and dental technology students, to assess the effectiveness of the framework as a tool for measuring the outcomes of IPE, and to promote IPCP among dental and dental technology students.

Effect of different tooth preparation designs on the marginal and internal fit discrepancies of cobalt-chromium crowns produced by computer-aided designing and selective laser melting processes.

Purpose: To evaluate the impact of five different tooth preparation designs on the marginal and internal fit discrepancies of cobalt-chromium (CoCr) crowns produced by computer-aided designing (CAD) and selective laser melting (SLM) processes.

Materials And Methods: Five preparation data were constructed, after which design crowns were obtained. Actual crowns were fabricated using an SLM process.

Evaluation of bone formation in neonatal mouse calvariae using micro-CT and histomorphometry: an in vitro study.

Neonatal calvarial bone has been widely used for investigating the biological behaviour of intramembranous bones. This work evaluated the bone formation of neonatal calvarial bone by microcomputed tomography (micro-CT) and histomorphometry. Moreover, the viability of neonatal calvarial bone and the effect of micro-CT radiation exposure on neonatal calvarial bone viability were investigated.

Titanium clasp fabricated by selective laser melting, CNC milling, and conventional casting: a comparative in vitro study.

Purpose: This study aimed to investigate the effects of selective laser melting (SLM), milling methods, and casting on the behavior of titanium clasp.

Methods: The clasp and its die simulating the molar were designed using 3D software. Clasp specimens were fabricated using SLM approaches (SLM Ti) and computerized numerical control (CNC) milling technology (Milling CPTi).

Accuracy and reproducibility of 3D digital tooth preparations made by gypsum materials of various colors.

Purpose: The study aimed to identify the accuracy and reproducibility of preparations made by gypsum materials of various colors using quantitative and semi-quantitative three-dimensional (3D) approach.

Materials And Methods: A titanium maxillary first molar preparation was created as reference dataset (REF). Silicone impressions were duplicated from REF and randomized into 6 groups (n=8).

Morphologic Analysis of the Temporomandibular Joint Between Patients With Facial Asymmetry and Asymptomatic Subjects by 2D and 3D Evaluation: A Preliminary Study.

Signs and symptoms of temporomandibular joint (TMJ) dysfunction are commonly found in patients with facial asymmetry. Previous studies on the TMJ position have been limited to 2-dimensional (2D) radiographs, computed tomography (CT), or cone-beam computed tomography (CBCT). The purpose of this study was to compare the differences of TMJ position by using 2D CBCT and 3D model measurement methods.

[Immortalization of the SD rats' dental follicle cell with simian virus 40 large tumor antigen gene].

Objective: To construct SD rat immortalized dental follicle cells (rDFC) induced by simian virus 40 large tumor antigen (SV40Tag) gene to provide a reliable cell source for periodontal tissue engineering research.

Methods: The rDFC was isolated by tissue mass method combined with enzyme digestion method and evaluated by immunohistochemistry. Cell293 were transfected with plasmid pSSR69/pAmpho containing SV40Tag gene by mediating liposome.

[Effect of low-intensity pulsed ultrasound on periodontitis in Beagle dogs].

Objective: To investigate the effect of low intensity pulsed ultrasound (LIPUS) on periodontitis in Beagle dogs.

Methods: The animal model of chronic periodontitis was established with elastic ligature-induced alveolar bone defect in Beagle dogs. LIPUS with different intensity (50 mW/cm2, 100 mW/cm2) pulse wave and 50 mW/cm2 continuous wave, 1.

[Biomechanical study of "mandible-temporomandibular joint" under different loading angles with forsus].

Objective: To identify the best loading angle with Forsus for mandible-temporomandibular joint.

Methods: The changes in stress, displacement and rotation of "mandible-temporomandibular joint" were tested under -30 degrees, -15 degrees, 0 degrees, 15 degrees and 25 degrees of loading angles using a primary three dimensional finite element model.

Results: From 0 degrees to 25 degrees, with the increases of loading angles the displacement gradually increased.

[Low intensity pulsed ultrasound combined with guided tissue regeneration for promoting the repair of defect at canines periodontal fenestration in Beagle dogs].

Objective: To evaluate the effects of low intensity pulsed ultrasound (LIPUS) combined with guided tissue regeneration (GTR) for the repair of the periodontal fenestration defect at the canines in Beagle dogs.

Methods: Four Beagle dogs were used for establishing the periodontal fenestration defect. Sixteen canines of four Beagle dogs were simple randomly assigned into experimental group 1 [LIPUS (60 mW/cm(2), 20 min/d) irradiation + GTR + the periodontal fenestration defect], experimental group 2 [LIPUS (60 mW/cm(2), 20 min/d) irradiation + the periodontal fenestration defect], experimental group 3 (GTR + the periodontal fenestration defect) and control group (the periodontal fenestration defect).

[Influence of the peri-implantitis to the microscrew-bone interface].

Objective: To study the histological change of microscrew-bone interface, detect the relative cytokine of gingival crevicular fluid, and explore the impossible mechanism of peri-implantitis.

Methods: Four male Beagles were collected. Randomly select one side of animals jaw as the experimental group to induce the peri-implantitis, and another side as the control group.

[Repairing effects of low-intensity pulsed ultrasound on alveolar bone defects in Beagle dogs].

Objective: To evaluate the potential repairing effects of low-intensity pulsed ultrasound (LIPUS) irradiation on acute horizontal alveolar bone defects at the mandibular pre-molar areas in Beagle dogs.

Methods: Horizontal alveolar bone defect models were established under enamelo-cemental junction 6 mm at the mandibular third and forth pre-molar buccal regions on both sides in 4 beagle dogs, and bilateral sides of each dog were randomly divided into two groups: Experimental groups with LIPUS irradiation (I(SATA) 30 mW X cm(-2), 20 min x d(-1)) and control groups without opening power source of LIPUS radiation. Dual energy X-ray bone densitometer was used to detect the bony density after an 8 weeks' irradiation.

[Preliminary study of cranio-maxillofacial hard tissue structure feature of young mandibular retrusion orthognathic patients with delaire cephalometric analysis].

Objective: To guide the orthodontic diagnosis, treatment planning and prognosis by analyzing the craniofacial morphology and reimbursement mechanism of young patients with mandibular retrusion in Chongqing territory by Delaire cephalometric analysis.

Methods: Both conventional cephalometric analysis and Delaire cephalometric analysis were conducted on the basis of the lateral cephalograms from 56 young mandibular retrusion patients and 40 teenagers with normal occlusion.

Results: Decreases in angle SNB, Co-Go, Co-Pog, U1-L1 and increases in angle ANB, angle SN-MP, L1-MP were seen in mandibular retrusion group by conventional cephalometric analysis.

[Three dimensional finite element analysis of maxillary anterior teeth retraction with micro-implant anchorage and sliding mechanics].

Objective: To investigate the biomechanical effects of micro-implant anchorage technique with sliding mechanics on maxillary anterior teeth retraction under different implant insertion heights and different retraction hook heights.

Methods: The three dimensional finite element model of maxillary anterior teeth retraction force system was constructed with CT scanning and MIMICS software and the relationships between brackets, teeth, wire and micro-implant were simulating the clinical factions. Then the initial tooth displacement was calculated when the insertion heights were 4 mm and 8 mm and the retraction hook heights were 1, 4, 7, 10 mm respectively.

[Three-dimensional finite element analysis of stress distribution in mandible advanced with Forsus].

Objective: To construct a three-dimensional finite element model of mandible and to analyze the stress distribution in mandible advanced with Forsus.

Methods: One growing patient with mandibular retrusion was selected. After leveling and aligning with MBT (Mclaughlin Bennett Treriri) straight-wire appliance to achieve the request of forsus with the spiral CT, a three-dimensional finite element model was constructed and the stress distribution in mandible after advancing at 1 second, 15 seconds and 300 seconds was analyzed.

[Distraction osteogenesis in correcting facial asymmetry malformation caused by temporomandibular joint ankylosis: a case report].

A facial asymmetry patient caused by temporomandibular joint ankylosis was operated by putting a distraction osteogenesis (DO)-appliance. One week after surgery, the right mandible was distracted. Twenty days after distraction, the height of right mandibular ramus and body increased obviously.

[Study of computer-assisted Delaire cephalometric analysis system].

Objective: The purpose of this study was to establish the computer -assisted Delaire cephalometric analysis system with WinCeph8.0 in order to simplify the procedure of manual Delaire cephalometric analysis.

Methods: On the basis of the theory of Delaire cephalometric analysis and the program module of WinCeph8.

[Researches on biomechanics of micro-implant-bone interface and optimum design of micro implant's neck].

Objective: To compare and analyze the stress distribution at the micro-implant-bone interface based on the different micro-implant-bone conditioned under orthodontic load, and to optimize the design of micro implant's neck.

Methods: An adult skull with all tooth was scanned by spiral CT, and the data were imported into computer for three-dimensional reconstruction with software Mimics 9.0.

[Construction of the three-dimensional finite element model of micro -implant -maxilla].

Objective: To explore a new method to construct the three-dimensional finite element model of micro-implant-maxilla using Materialise's interactive medical image control system (Mimics).

Methods: The maxilla with all teeth was scanned with Spiral CT and the images were transferred into the Mimics 9.0 software to obtain the three-dimensional images.

[Time varied stress effects on the proliferation of myoblast in rats].

Objective: To investigate the effects of time varied stress on the proliferation of myoblast in rats and provide the basic experimental data for the remodeling of tissue in functional orthopaedics.

Methods: Based on the pulsatile mechanical system founded, this study loaded different strain (2.5, 5.

[Time varied stress effects on the shape-alteration of myoblast in rats].

Objective: To investigate the effects of time varied stress on the shape-alteration of myoblast in rats and to provide a theoretic base to determine the mechanics of myoblast in orthodontic therapy.

Methods: Based on the pulsatile mechanical system our group founded, this study loaded different strain (2.5 kPa, 5.