General dentistry最新文献

{"title":"Prevalence of zygomatic air cell defects in a North American population.","authors":"Daniel P Turgeon,&nbsp;Rachel Novack","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Zygomatic air cell defects (ZACDs) are asymptomatic defects present in the zygomatic process and articular eminence of the temporal bone. This defect is considered a normal anatomical variant and can be detected on routine panoramic images. The objective of this study was to determine the prevalence, dominant type, and location of ZACDs in a North American population. A total of 1724 panoramic images of adult patients were analyzed by a third-year dental student in conjunction with an oral and maxillofacial radiologist. Patient demographics (age and sex) as well as ZACD location (unilateral right/left or bilateral) and appearance (unilocular or multilocular) were evaluated. Statistical analyses included the Clopper-Pearson method to calculate the 95% CI, Student t test for independent samples, and Fisher exact test. The prevalence of ZACDs in this study population was 2.1%. A total of 24 women (2.3%) and 12 men (1.7%) were affected, with no statistically significant difference between the sexes. The mean (SD) age of patients presenting with a ZACD was 56.6 (17.7) years, while that of patients without a ZACD was 53.0 (16.3) years, with no statistically significant difference between groups. Among the 36 patients with ZACDs, 28 (1.6%) had unilateral and 8 (0.5%) had bilateral lesions. One patient with bilateral ZACDs had a unilocular lesion on the right side and a multilocular lesion on the left, so there were a total of 31 unilocular lesions (1.8%) and 6 multilocular lesions (0.3%). The results of this study indicate that the prevalence of ZACDs in the study population was 2.1%, without any statistically significant differences based on the sex or age of the patient or laterality or appearance of the lesions.</p>","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"42-46"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The challenge of ceramic restorations on dark substrate: a case report.","authors":"Bruna Chrispim,&nbsp;Larissa Fernanda Pottmaier,&nbsp;Joana Maia Moreira,&nbsp;Jussara Karina Bernardon,&nbsp;Guilherme Carpena Lopes","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The use of dental ceramics on anterior teeth is associated with predictable and long-lasting esthetic results. However, treatment on darkened substrates is challenging. Various conservative options, including ceramic veneers, are available to change the shape and color of anterior teeth. The aim of this case report is to describe the esthetic rehabilitation of a darkened central incisor in a maxillary anterior region that had irregular gingival contours, multiple composite resin restorations, and unsatisfactory tooth shapes. Harmony was restored through periodontal recontouring surgery, placement of a lithium disilicate crown (consisting of a veneer cemented to a coping) on the darkened central incisor, and placement of lithium disilicate veneers on the other maxillary anterior teeth.</p>","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"56-60"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Planning ahead.","authors":"Timothy F Kosinski","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"5"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spectrophotometric assessment of the color stability of composite resins polished with different techniques.","authors":"Azam Valian,&nbsp;Seyedeh Mahsa Sheikh-Al-Eslamian,&nbsp;Foroogh Zolfagharzadeh,&nbsp;Farzaneh Sadeghi Mahounak","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This study aimed to use spectrophotometry to assess the color stability of composite resins polished with different polishing techniques and scanning electron microscopy (SEM) to evaluate the surface micromorphology of the specimens. In this in vitro experimental study, a total of 96 disc-shaped specimens were fabricated from microfilled (Renamel Microfill, shade SB3) and nanohybrid (Estelite Sigma Quick, shade BW) composite resins in bright white shades (n = 48). Each group was randomized into 1 control and 2 experimental subgroups (n = 16): no polishing (control), polishing with aluminum oxide discs (experimental), or polishing with diamond-impregnated spiral wheels (experimental). In each subgroup, half of the specimens were immersed in a coffee solution and the other half in a tea solution for 48 hours after finishing (control) or polishing (experimental). Spectrophotometry was used to measure the color of the specimens at baseline, after finishing, after polishing (experimental groups only), and after immersion in tea and coffee. The surface micromorphology of a randomly selected specimen from each subgroup was assessed under SEM. The color change (ΔE*) of the specimens between measurements was calculated and analyzed using 1-way, 2-way, and 3-way analyses of variance (ANOVAs) and the Tukey test. Both tea and coffee caused significant color change in the composite resin specimens, with specimens immersed in coffee undergoing significantly greater color change than those immersed in tea (P < 0.001; 2-way ANOVA). The nanohybrid composite specimens polished with polishing discs had a significantly greater color change than nanohybrid specimens polished with spiral wheels (P = 0.041). The Tukey test revealed that there was no overall significant difference between the 2 polishing techniques (P = 0.505), but both of these subgroups exhibited a significantly lower color change than the control group (P < 0.001). In general, SEM did not reveal substantial differences between the 2 polishing techniques, but specimens polished by spiral wheels appeared to have a smoother surface. All polished specimens demonstrated clinically acceptable mean color change values (ΔE* < 3.5). The type of coloring agent had a greater effect on color stability than either the polishing technique or type of composite resin, with coffee causing a greater color change than tea.</p>","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"61-67"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Management of significant molar root concavities: a case report.","authors":"Nathan H Dinsbach","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"10-11"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporary fixed prosthesis materials and beverage colorants: an in vitro study.","authors":"Yosra Gassara,&nbsp;Marwa Jebahi,&nbsp;Rihab Dakhli,&nbsp;Rim Kallala,&nbsp;Zohra Nouira","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The esthetic outcome of temporary prostheses, especially those in the anterior area, is of primary importance. The purpose of this in vitro study was therefore to evaluate the color stability of 3 temporary restorative materials: self-curing (SC) acrylic resin (Tempron); heat-curing acrylic resin (SR Ivocron); and polymethyl methacrylate resin blocks (Telio CAD) machined using computer-aided design/computer-aided manufacturing (CAD/CAM) technology. The heat-curing material was polymerized with either a pressure-curing technique (PT) or a flasking technique (FT). As a result, there were 4 experimental groups: SC, PT, FT, and CAD/CAM. Sixteen specimens were prepared for each group. After polymerization or milling, all specimens were polished using a diamond polishing paste, and 1 specimen from each group was exposed to Fourier-transform infrared (FTIR) and ultraviolet visible (UV-Vis) spectroscopy before immersion. The specimens were exposed to pigmented beverage agents (coffee, cola, turmeric solution, or tea), and the color change was monitored for 4 weeks using FTIR and UV-Vis spectroscopy as well as by macroscopic observation of the specimens (n = 4 per group per immersion period). The PT specimens showed the most significant color change, followed by the SC specimens. A less significant color variation was noted in the FT specimens, and insignificant change was reported in the CAD/CAM group. The solution that had the most significant staining effect was turmeric, and the CAD/CAM resin showed the greatest color stability of the tested materials. Color stability depends on the material used, the polymerization technique, the polishing steps, the pigmentation agent, and the duration of exposure to the agent.</p>","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"24-30"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dental providers' familiarity with and attitudes about alternative payment models in value-based care.","authors":"Kevin Rodriguez Lichtenberg,&nbsp;Oscar Arevalo,&nbsp;Eric Tranby,&nbsp;Madhuli Thakkar-Samtani,&nbsp;Suheily Aponte-Rodriguez,&nbsp;Lesbia Drukteinis","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The objective of this study was to examine dental providers' familiarity with and attitudes toward alternative payment models (APMs) in a value-based care (VBC) delivery model. The authors analyzed responses to questions pertaining to VBC and APMs from a survey conducted between March and April 2021. Responses were stratified by age, race, practice location, practice type, and provider specialty using descriptive and inferential analysis, including Pearson chi-square or Fisher exact test. Analyses were performed using statistical software, with P < 0.05 indicating statistical significance. The sample consisted of 378 dental providers (women, n = 211). The majority (n = 321) worked in private practice; 170 were general dentists and 41 were pediatric dentists. Public health practitioners were more likely than private practitioners to report being familiar with VBC strategies and APMs (P < 0.003). Older providers were less interested than younger providers in participating in risk-sharing agreements (P < 0.049), while those practicing in urban locations were more likely to consider participating in partial (P < 0.001) and full capitation models (P < 0.014). Hispanic dentists and public health practitioners were more likely (P < 0.025 and P < 0.015, respectively) than other respondents to report that VBC arrangements would lead to more equitable outcomes. While some dental providers understood APMs and reported using them, survey respondents in general were unfamiliar with both VBC and APMs.</p>","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"48-55"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluctuant labial swelling and Wrinkled labial lesion.","authors":"Tanya M Gibson","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 6","pages":"78-80"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54228698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Help wanted.","authors":"Timothy F Kosinski","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 5","pages":"6"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10028488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nasal patency and mandibular movement: clinical application in prosthodontics.","authors":"Enoch T Ng,&nbsp;Steven R Olmos","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This case report describes a patient with a primary concern of persistent mandibular deviation during speech who experienced clinically significant improvement (mandibular movement without deviation) after improvements to nasal resistance. At the initial consultation, temporary placement of a nasal valve dilator immediately eliminated the patient's mandibular deviation during speech, indicating the need for referral to an otolaryngologist. The patient was also provided with a dental appliance to address secondary concerns of temporomandibular joint noises and cervicofacial pain. Although the dental treatment provided some relief, resolution of the patient's mandibular deviation during speech did not occur until after nasal surgery was completed. This case illustrates the importance and effects of nasal resistance and nasal patency to obtaining a reproducible mandibular position.</p>","PeriodicalId":12571,"journal":{"name":"General dentistry","volume":"71 5","pages":"30-33"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10028494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}