Journal of Clinical and Experimental Dentistry最新文献

Background: This study aimed to evaluate the effect of dentin pre-treatment with EDTA and silanization of glass fiber posts on the bond strength of different resin cements to root dentin.

Material and methods: Fifty-six extracted single-rooted human teeth received endodontic treatment and were restored with White Post DC (FGM) 0.5 fiber posts. Samples were divided into four groups: (1) Relyx U200 without EDTA, (2) Relyx U200 with EDTA, (3) Relyx ARC without EDTA, and (4) Relyx ARC with EDTA. Each group had a silane-treated subgroup (n=7). Root canals were prepared with Peeso reamer No. 3, leaving 4 mm of filling. Posts were cleaned with absolute alcohol (1 min) and air-dried (30 s). Silane was applied to half the posts for 60 s, then air-dried for 30 s. Specimens were mounted on acrylic plates with low-melting adhesive and sectioned using an Isomet saw (200 rpm, constant irrigation) and extra-fine diamond disc. Three slices (~1.5 mm thick) were obtained per tooth (coronal, middle, apical thirds). Thickness was measured with a digital caliper. Slices were positioned cervical side down in a 3.5 mm support matrix. A force was applied at 0.5 mm/min using a rod with a 0.8 mm extra-fine tip. Data were analyzed using Kolmogorov-Smirnov and Student's t-tests.

Results: Relyx ARC showed higher bond strength than Relyx U200, regardless of silane or EDTA use. The combination of silane and EDTA did not significantly affect results (Relyx U200 p=0.402; Relyx ARC p=0.510). Adhesive failure at the cement/dentin interface occurred in 51.61% of all samples, regardless of technique.

Conclusions: EDTA and/or silane did not influence the bond strength of fiber posts to root dentin. Key words:Bond Strength, Edetic Acid, Fiber-posts, Endodontics.

Accidental extraction of the wrong tooth can lead to complications such as external root resorption (ERR) after replantation. This case report describes the management of an 11-year-old female patient with ERR in a replanted mandibular first molar (#36) following iatrogenic extraction. Regenerative endodontic procedures (REPs) were employed, including chemical disinfection, intracanal calcium hydroxide medication, blood clot induction, and the placement of Biodentine™. Follow-up over 24 months showed resolution of clinical symptoms, arrest of root resorption, healing of periapical lesions, and complete apical closure. Cold pulp testing yielded positive results after 12 months, confirming regenerative response. This case highlights the potential of REPs as a biologically based approach for managing complex endodontic conditions involving root resorption, even in mature permanent teeth. It contributes to the growing body of evidence supporting REPs as a viable option in the treatment of tooth avulsion. Key words:External Root Resorption, Regenerative Endodontic Procedures, Accidental Tooth Extraction.

Sickle cell anemia, or sickle cell disease, is a hematologic condition commonly found in populations from the Middle East, India, the Caribbean, and the Mediterranean. One of its complications is the development of long bone osteomyelitis. However, mandibular bone involvement is rare, which makes early diagnosis of this disease difficult when it affects this anatomical region. In this article, we present the case of a 25-year-old male with a prior diagnosis of sickle cell anemia who developed mandibular osteomyelitis associated with a paramandibular abscess and ipsilateral temporomandibular joint involvement, which was diagnosed and treated medically and surgically. Through this case, we aim to provide clinical insight into mandibular infectious complications associated with sickle cell anemia, along with their diagnosis and therapeutic management. Multidisciplinary care, clinical evaluation, laboratory findings, and imaging studies are the main pillars for the management of this disease. Furthermore, we review the literature on the clinical presentation, diagnosis, and treatment of mandibular osteomyelitis in patients with sickle cell disease. Key words:Sickle cell anemia, mandibular osteomyelitis, Vascular Occlusion Crisis.

Background: The purpose of this in vitro study was to evaluate the dimensional stability of PET-G clear aligners.

Material and methods: Two starting passive aligners of different thicknesses (0.75 mm and 0.88 mm) were subjected to cyclic compressive loading tests using the Instron 3343 testing machine in the laboratory, both with and without saliva. The intermolar and intercanine distances, measured in the occlusal direction, and the intermolar and intercanine Facial Axis (FA) distances, calculated between the most vestibular points of the crowns defined as Facial Axis points, were recorded using the dedicated software 3Shape Orthoviewer. Finally, the aligners were scanned using a laboratory scanner (3Shape TRIOS®) and then compared with the untested aligners of the control group.

Results: The 0.75-mm-thick aligners exhibited greater dimensional stability than the 0.88-mm-thick aligners when measuring intercanine distance, both with and without saliva. In contrast, the 0.88-mm-thick aligners demonstrated greater stability than the 0.75-mm-thick aligners when measuring intermolar distance under the same conditions. In the measurement of FA distances, higher values were observed at the molar level when the tests were conducted both with and without saliva, whereas no significant changes were observed in the intercanine distance.

Conclusions: The 0.88-mm-thick aligners demonstrated better dimensional stability during tests with and without saliva in the intermolar distance, while the 0.75-mm-thick aligners showed better dimensional stability in the intercanine distance. Key words:Clear Aligners, PET-G, thickness, dimensional stability, cyclic compressive load tests.

Intentional replantation is a process that involves purposeful tooth extraction and subsequent reinsertion of the removed tooth. Intentional replantation may be a therapeutic option worth considering to preserve the natural teeth and prevent tooth extraction, even though the success rate is not always high. Systemically healthy male patient was referred to our department. Diagnosis was chronic periodontitis and class III mobility was noted at the right maxillary central incisor with complete periodontal attachment loss. After phase I therapy periodontally involved tooth was extracted, endodontic treatment was accomplished, the tooth was replanted and stabilized with a composite wire splint. At the end of 3 years tooth was in function with alveolar bone gain. Intentional replantation provided long-term maintenance of patient's own teeth and can be considered as an alternative treatment option tooth with hopeless prognosis. Key words:Ankylosis, Chronic Periodontitis, Periodontal Attachment Loss, Root Resorption, Tooth Replantation, Tooth Extraction.

Background: Oral cancer (OC) represents a significant public health challenge in Latin America, with similar challenges presented in most countries of the region. Regional partnerships are needed, as they can enhance the development of educational campaigns, prevention strategies addressing shared risk factors, and institutional strengthening. Additionally, expanding collaborations can attract international funding and integrate LAC researchers into global initiatives.

Material and methods: This review examines the state of OC research in the region, highlighting collaborative efforts, gaps, and opportunities for advancement.

Results: We identified 17 studies that have studied different aspects of oral cancer in Latin American countries (LAC). Studies varied in design, with ecological studies and case series being the most common. Most studies focused purely on OC, while research on oral potentially malignant disorders (OPMD) remains limited. Collaborative studies have increased over the past decade, with a growing focus on regional risk factors such as tobacco and alcohol use. Despite these advances, challenges persist, including limited epidemiological data, underreporting of cases, and inadequate public health infrastructure.

Conclusions: Collaborative networks have the potential to reduce these gaps by pooling resources, expertise, and data. Improved public health policies supported by robust local data are crucial for reducing the OC burden in LAC. Strengthening regional and international collaborations will be fundamental for the advancement of OC research, improving early detection, and implementing effective prevention and treatment strategies tailored to the region's unique challenges. Key words:Oral cancer, mouth neoplasms, Latin America, oral potentially malignant disorders.

Background: Blood pressure measurement (BPM) is a primary test for detecting and managing cardiovascular risk, is an inexpensive strategy and can be performed by non-physician health workers (NPHWs). This study explored the association between the BPM in dental offices and other dentists' practices related to cardiovascular risk management.

Material and methods: A cross-sectional study was conducted. A self-administered electronic survey was used, validated by experts with more than 10 years of clinical, teaching and research experience. Simple random sampling was used to select the participants at an anonymized database. The survey was completed by dentists who practice clinically at least part-time in Colombia. Descriptive and multivariate analyses were conducted.

Results: A total of 232 dentists were interviewed. Blood pressure was measured in the dental office by 40.5% of the dentists, with 27.2% using an automatic device. After adjusting for age, education, and support staff, an association was observed between the absence of BPM in dental offices and the following practices: not inquiring about alcohol use, physical inactivity, high cholesterol, obesity, a lower likelihood of measuring glucose in the dental office, not referring patients to a laboratory for glucose measurement, not communicating with medical professionals to arrange patient treatment, and not educating people with obesity about the risk of systemic disease.

Conclusions: BPM in dental offices is limited. Most dentists report inquiring about modifiable cardiovascular risk factors, as well as making referrals, providing counseling, and offering education. However, the absence of BPM in dental offices is associated with the omission of other practices related to cardiovascular risk management. NPHWs like dentists can task sharing cardiovascular risk management. Key words:Blood pressure, hypertension, cardiovascular risk factors, primary prevention, dental office.

Background: Accurate diagnosis is crucial for effective treatment planning and management. This study aims to evaluate the concordance between clinical and histopathological diagnoses of oral biopsy specimens submitted to the Oral Pathology Unit, Faculty of Dentistry, Naresuan University, Thailand, over a 20-year period.

Material and methods: Histopathology reports from 2004 to 2023 were retrieved and reviewed. Data on age, gender, lesion location, clinical diagnosis, and histopathological diagnosis were collected. The concordance between clinical and histopathological diagnoses, as well as factors associated with the concordance rate, were analyzed.

Results: Of 1,253 biopsied cases, a total of 1,148 were included in the study. These comprised 513 males (44.69%) and 635 females (55.31%), with an average age of 40.97 ± 20.70 years. The majority of lesions were reactive and inflammatory lesions (35.1%), followed by epithelial pathology (10.02%), and immune-mediated lesions (7.58%), respectively. Twenty-nine cases (2.53%) were malignant. Overall, clinico-pathological concordance was observed in 69.34% of cases. The highest and lowest concordance rates were noted in immune-mediated lesions and non-odontogenic cysts and tumors, respectively.

Conclusions: There is considerable variability in concordance among different oral lesion types. The results of this study provide insights into the prevalence of oral lesions in a group of Thai population and offer a valuable database for clinicians in developing clinical diagnoses for oral lesions. Key words:Concordance, Oral biopsy, Clinical diagnosis, Histopathological diagnosis.

Background: Tooth cavity cleaning is a fundamental step to achieve greater adhesion in composite resins restorations. This study aimed to evaluate the influence of different sizes of prophylaxis brush on marginal microleakage and hybrid layer morphology in composite restorations.

Material and methods: Thirty Class V tooth preparations were distributed into 3 groups according to the type of cavity cleaning (n=10): G1: no prophylaxis; G2: Prophylaxis brush with regular size (Robson Brush Prophylaxis/DHPro); G3: Prophylaxis brush with reduced size (Robson Microtuft®/DHPro brush). After the respective cleaning protocol, third human molars were restored using a universal adhesive system (Single Bond Universal - 3M ESPE) and composite resin (FiltekTM Z350 XT 3M ESPE). To characterize the dentin substrate, the samples were prepared until the selective conditioning step and evaluated by scanning electron microscope (SEM) and hybrid layer's morphology was also evaluated after the restorative procedure (n=2). To assess the marginal microleakage, the sample were submitted to the thermocycling process, finished, and polished. After this step, the images were obtained by Micro-CT, and two calibrated evaluators scored the depth of dye penetration as 0 to 3. The Kruskal-Wallis test was used to compare groups regarding marginal microleakage (p<0.05).

Results: G1 and G2 showed the presence of a gap between restoration and dentin, however, G3 showed greater regularity compared to the other groups. In microleakage scores, G1 showed more frequency for score 3 followed by G3 e G2 (p>0.05).

Conclusions: Therefore, the Robson Microtuft® brush did not influence the marginal infiltration of the adhesive restorations, but the absence of prior prophylaxis increased the levels of infiltration and obtained a more irregular adhesive interface. Key words:Microleakage. marginal adaptation. universal adhesives.

Background: The current approach to dental caries focuses on early diagnosis and intervention at initial stages. In the presence of a carious lesion, a minimally invasive strategy is favored. Within this context, materials have been developed to promote remineralization, prevention, and conservative treatments, with silver diamine fluoride (SDF) standing out as an effective alternative. The purpose of this scoping review is to evaluate, through a literature review, the success of restorations in teeth treated with SDF, using microleakage as the evaluation parameter.

Material and methods: A search was conducted in electronic databases including PubMed, Virtual Health Library, EBSCOHost, SCOPUS, ProQuest, and ScienceDirect. The search was carried out up to May 24, 2024, following the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines.

Results: A total of 298 articles were retrieved, of which only 8 met the inclusion criteria and were used for the literature review. The selected studies underwent a quality control review to assess the success of restorations in teeth treated with SDF.

Conclusions: Although information on the effect of SDF on the adhesion of resin-modified glass ionomer restorations is limited, some studies show no correlation indicating that prior SDF treatment causes microleakage in such restorations. Key words:Dental caries, Preventive dentistry, Dental restoration, Silver diamine fluoride.