Journal of Clinical and Experimental Dentistry最新文献

Background: Adequate preclinical training in dentistry is crucial for students before engaging in patient treatment. Constructive feedback from the instructors plays a pivotal role in guiding the students to master skills, boost confidence, and above all ensure patient safety. This manuscript introduces a new method employing intraoral scanners as digital tools to provide objective and quantitative feedback for crown preparation evaluation in preclinical prosthodontics.

Material and methods: Initial reference scan before preparation on typodont and preparation scan after crown preparation was obtained. Utilizing the patient monitoring feature in Trios 3 scanner (3Shape, Copenhagen, Denmark) superimposition of two scans was performed.

Results: The method enabled a comprehensive quantitative preparation assessment compared to the tooth pre-preparation. This includes tooth reduction in any axis, abutment height measurement, evaluation of the status of adjacent teeth after preparation, and proposed capability for estimating the convergence angle.

Conclusions: The method enabled a subjective quantitative evaluation of crown preparation in phantom model. This method requires no additional hardware or software beyond the basic functions embedded in the intraoral scanner. Implementation of this function not only facilitates feedback and self-evaluation for students during preclinical teaching but also enhances their proficiency in using intraoral scanners in clinical practice in perspective. Key words:Dental education, prosthodontics, intraoral scanner, feedback, self-assessment.

Background: The treatment of multiple mandibular fractures may often be challenging. The aim of this study was to evaluate the characteristics and outcomes of multiple mandibular fractures, with a focus on triple mandibular fractures.

Material and methods: Patients with multiple (triple) mandibular fractures were included. The following data were recorded for each patient: age; gender; cause of injury; sites of mandibular fractures; presence of complications. Facial width was esthetically evaluated through a clinical examination considering the inferior facial width, postoperative asymmetries, and facial esthetic harmony.

Results: From January 1, 2010, to December 31, 2018, 25 patients (15 men, 10 women) underwent surgery for triple mandibular fractures and were included in the study. A predominance of symphysis/parasymphysis fracture associated with bilateral condylar/ramus fractures was observed, followed by symphysis/ parasymphysis fracture combined with mandibular angle fracture and condyle fracture. Most patients did not show any type of complications. An optimal esthetic outcome was obtained in 20 patients.

Conclusions: A successful treatment of trifocal mandibular fractures may be achieved by different techniques, although it remains challenging. The re-establishment of the transversal bigonial dimension by a correct reconstruction of the mandibular arch should guide surgeons. The aim of the treatment should always be the successful rehabilitation of patients' pretraumatic occlusion and function. Key words:Mandibular fractures, multiple, treatment, management, mandible.

Background: To examine the prevalence and pattern of pathology related to impacted teeth and other areas in the Department of Oral and Maxillofacial Surgery of the Government Dental College in Chhatrapati Sambhajinagar.

Material and methods: This 5-year single-center retrospective cohort study was conducted in the department of oral and maxillofacial surgery at the government dental college and hospital in Chhatrapati Sambhajinagar between 2019 and 2024. Based on age, sex, area, presence of impacted tooth, radiological and histopathological report. Statistical analysis using the Statistical Package for the Social Sciences (SPSS) software (SPSS Inc., Chicago, IL, USA).

Results: A study of 3469 patients' panoramic radiographs revealed that 1696 patients had at least one impacted tooth. The third molar was the most common impacted tooth (89.4%), with a higher prevalence among women. Among the 28,72 impacted teeth, the dentigerous cyst (193) was the most common lesion. Histopathologically, out of 546 cases, infected dental cyst (23.6%) was the most common hard tissue lesion, while traumatic fibroma (6%) was the most common soft tissue lesion according to biopsy reports.

Conclusions: A study using panoramic radiographs found that 48.8% of 3469 patients had impacted teeth. Only 36% of patients with impacted teeth reported symptoms, and 75% had problem on just one side. Biopsies in 546 patients revealed cysts and traumatic fibromas as common findings. The study suggests that biopsies are necessary to determine the type and severity of lesions for early treatment. Key words:Radiographic analysis, Histopathological analysis, cyst, tumors, impaction.

Background: Successful tooth autotransplantation (TAT) requires preservation of the periodontal ligament (PDL) on donor teeth and good vascularization of the recipient site to ensure maintenance of alveolar bone volume through physiological stimulation of PDL. This retrospective study aims to evaluate the survival and success rate of a two-step procedure that uses dual periodontal stimulation and a 3D replica of the transplanted tooth to promote ligament repair and prevent ankylosis and root resorption.

Material and methods: All consecutive patients followed at the dental center of Rennes and having undergone a TAT in two surgical stages with double periodontal stimulation and the use of a 3D replica of the transplanted tooth between 2017 and 2022 were invited for follow-up clinical and radiographic examination. First, survival rates were calculated on the basis of a telephone survey. Then, a clinical and radiological follow-up examination was used to calculate the success rate.

Results: Of these 22 transplants, 21 were still functioning, and 1 had been extracted, giving a 95,5% probability of survival after a median follow-up of 23 month. Of the 21 teeth eligible for success analysis, clinical and radiological follow-up showed a success rate of 90,5% with normal PDL and no ankylosis.

Conclusions: The teeth auto-transplanted by this procedure gave a very satisfactory survival and success rate in the medium term. This study suggests that this standardized autotransplantation procedure potentiates PDL healing and may be a viable and predictable treatment in current clinical practice, especially when orthodontic treatment is required. Key words:Tooth autotransplantation, 3D printing, periodontal regeneration, bone regeneration.

Background: The objective of this study is to assess the relationship between bruxism and the use of Invisalign® transparent aligners, and to determine if they increase or decrease the action of bruxing with its signs and symptoms.

Material and methods: A sample of 100 adult patients undergoing orthodontic treatment with transparent Invisalign® aligners was studied, analyzing signs and symptoms of bruxism by personal survey together with a clinical examination on 3 occasions: Pre-treatment, at 3 months of treatment and at 6 months of treatment.

Results: There is a statistically significant difference between the amount of bruxism and the use of Invisalign® type aligners, for all the variables analyzed except in the analysis of the increase in headaches.

Conclusions: The frequency of bruxism does not depend on sex, but is related to age groups, the most affected being 28-36 years old patients. Statistically significant differences have been observed (P<.05) with notable reductions in: 1) Clenching and/or grinding sensation, 2) Sensation of contracted masticatory muscles, 3) Muscular pain of the masticatory muscles and 3) Pain of the temporomandibular joint. Additionally, 4) facial aesthetics and lip position experienced statistically significant differences (P<.05) without an increase or reduction being predominant. There is no relationship between the increase in headaches and the use of Invisalign® transparent aligners, as no statistically significant differences were found (P<.05). Key words:Bruxism, survey, aligners, Invisalign, Masticatory muscles, Temporomandibular joint.

Background: Post-operative pain (POP) is a major problem in endodontics. This prospective study aims to investigate POP and the rate of analgesic intake after root canal treatment (RCT) using two obturation techniques: warm vertical compaction with epoxy resin-based sealer (WVT) versus sealer-based obturation (SBO) using a single-cone gutta-percha with calcium silicate-based sealer.

Material and methods: All RCT were carried out by the same endodontist, following a standardized protocol, and using two different obturation techniques: WVT with AH Plus sealer, and SBO with single-cone gutta-percha and AH Plus Bioceramic sealer. Patients finally assessed were 29 in the SBO group and 34 in the WVT group. After RCT, patients completed a 10-cm visual analogue scale (VAS) that ranked the level of pain. Results were analysed statistically using the Chi-square, ANOVA tests and logistic regression analysis.

Results: Sex, age, number of roots, pulp diagnosis, periapical status, previous intake of NSAIDs or antibiotics did not affected POP. In the WVT group, 38.2% of patients felt some pain 24 hours post-treatment, while in the SBO group this percentage was 20.7% (p = 0.07). There were no significant differences in the need for analgesics in the week following treatment.

Conclusions: The obturation technique used did not affect significantly the POP of patients after RCT. Although the percentage of patients in the SOB group showing POP was lower, there were no significant differences in the need to take analgesics. Key words:Calcium silicate sealer, endodontic pain, post-operative pain, resin based sealer, sealer based obturation, single cone obturation, warm vertical compaction.

Background: Xylitol is a sugar alcohol increasingly used in dentistry as a preventative measure against dental caries. The objective of this systematic review was to assess xylitol's efficacy in caries prevention through the reduction of the most commonly associated bacteria: Streptococcus mutans.

Material and methods: This systematic review followed PRISMA guidelines. A literature search was conducted in PubMed, Cochrane and Google Scholar databases. The search algorithm included the following key words: xylitol, dental caries, tooth demineralization, Streptococcus mutans, and prevention. The CASPe tool was used to assess risk of bias in the articles reviewed.

Results: After the search and selection processes, nine clinical trials (some of them placebo-controlled) in humans were included in the review. The objective proposed - to assess the efficacy of xylitol in caries prevention - was not fulfilled conclusively in all the works. Little heterogeneity was observed among the trials, as the study groups, evaluation periods, daily doses of xylitol etc. varied considerably between the works.

Conclusions: According to the present findings, the preventative effect of xylitol against dental caries cannot be confirmed. The results also highlight the need for further research with standardized protocols. Key words:Xylitol, dental caries, dental demineralization, Streptococcus mutans, prevention.

Background: Many studies have analysed the bibliometric characteristics of highly cited articles in dentistry, and orthodontics. However, scant attention has been paid to articles with low citation rates. The aim of this study is to identify author- and article-specific factors that may be associated with a low citation rate at least 6 years after publication.

Material and methods: In June 2023, a cross-sectional study was conducted on articles published between 2009 and 2018 in eight orthodontic journals indexed in the Journal Citation Report. The study recorded author- and article-specific variables for articles that received zero citations and those that received between one and three citations. Descriptive statistics were used to describe the articles and journals included in the study. Pearson's correlation analysis was used to test the correlation between a journal's impact factor and the number of low-cited articles for the individual journals. The articles' related topics were further analysed using VOSviewer 1.6.6 software.

Results: The electronic search identified 11,257 published items. After applying the inclusion and exclusion criteria, 216 uncited and 683 poorly cited articles were included in the final assessment. The Australasian Orthodontic Journal had the highest number of uncited and poorly cited articles, followed by Seminars in Orthodontics. A high negative correlation was found between the journal impact factor and the normalized number of uncited and poorly cited articles. The majority of uncited articles were expert opinions (28.24%), case reports (21.76%), and narrative reviews (21.30%). The most frequent topics were legislation, litigation, and ethics, followed by marketing and management. Most of the poorly cited articles were observational (29.43%) or translational studies (26.21%), and case reports (22.55%). The most prevalent topic in this cohort was eruption problems.

Conclusions: The impact factor of a journal is linked to the number of published articles that receive a low citation rate. Orthodontics has a higher prevalence of such articles compared to other branches of medicine. Topics such as litigation, legislation, ethics, and marketing tend to receive low citation rates. Uncited articles often consist of expert opinions or narrative reviews. Case reports are a common study design in both uncited and poorly cited articles. Key words:Bibliometric, Orthodontics, citations, Uncited.

Background: A complete and thorough understanding of head and neck anatomy by dental hygienists is fundamental for performing successful dental hygiene procedures in all clinical settings. Therefore, the aim of the present study was to assess the opinion of a population of dental hygiene students about the educational methods, their perceptions of the tooth drawing module, and their opinion about the content of Anatomy curriculum in an Italian University.

Material and methods: A comprehensive survey about was developed and electronically distributed to the dental hygiene students. The questionnaire consisted of questions on the application of anatomical knowledge in clinical practice, opinions on the contents and methods of gross anatomy education, and opinions on the tooth drawing module.

Results: The survey was completely answered by 63 respondents. According to most respondents, drawing exercises helped to better understand the anatomy of the teeth, to incorporate dental anatomy more effectively, and to improve their ability to visualize tooth anatomy. Most respondents reported that molars were the most difficult teeth to be drawn. The respondents gave the maximum importance to the anatomical knowledge of the mandible, the maxilla, the masticatory muscles, the temporomandibular joint, the palate, the tongue, the salivary glands, the trigeminal nerve, and the facial nerve.

Conclusions: Dental drawing exercises seem to be extremely important for Dental Hygiene Bachelor Degrees and they are well appreciated by students. Appropriate educational methods of anatomy should be used to improve the attention and the learning by dental hygiene students, thus finally hopefully resulting in the improvement of their clinical skills. Key words:Dental hygiene, anatomy, drawing, teeth, education.

Background: This study aimed to determine the fluoride release and flexural strength of four ion-releasing restorative materials.

Material and methods: A total of 80 samples of four different materials were prepared in standardized molds: Ketac Universal, Beautifil II, Cention N, and Equia Forte Fil. The fluoride release was quantified at 1, 3, 7, 14, and 28 days post-immersion using an ion-selective electrode. The flexural strength was measured with a universal testing machine after 7 days of immersion in deionized water. A one-factor intergroup ANOVA with Welch's robust variance and Games-Howell's post hoc was employed. To compare related measures, a Friedman test with Bonferroni's adjusted post hoc was employed. The p-value was set at 0.05.

Results: At 7 days, significant differences were observed in the flexural strength of the four ion-releasing restorative materials (p<0.001). The flexural strength values from highest to lowest were as follows: Cention N (97.10 ± 4.99 MPa), Beautifil (82.77 ± 5.30 MPa), Equia Forte Fil (31.38 ± 7.68 MPa), and Ketac Universal (19.23 ± 2.94 MPa). In addition, at 3 and 7 days, the highest amount of fluoride released was observed for Cention N compared to the other ion-releasing restorative materials (p<0.05). Conversely, Beautifil II released the lowest amount of fluoride at 3, 7, 14, and 28 days (p<0.05) compared to the other ion-releasing restorative materials.

Conclusions: The immersion of all ion-releasing restorative materials in deionized water for seven days resulted in significant differences in flexural strength. Cention N had the highest value, while Ketac Universal had the lowest. All ion-releasing restorative materials released fluoride at all test times, with Ketac Universal releasing the most at 1, 14, and 28 days, and Cention N releasing it at 3 and 7 days. Beautifil II showed the lowest fluoride release at all evaluated times, exhibiting a nearly constant release over time compared to the other materials. Key words:Fluoride release, flexural strength, glass ionomer.