Clinical, Cosmetic and Investigational Dentistry最新文献

Aim: To investigate the hardness and energy absorption of four commercially available chairside types of silicone materials and compare their properties with heat-cured silicone material.

Materials: The chairside materials investigated were GC reline soft, mucopren soft, sofreliner soft and elite soft relining. The heat-cured polymer silicone material was Molloplast B. All soft lining materials were processed according to manufacturers' instructions. Two properties were investigated. Ten specimens for each test were prepared for each soft liner except for the water absorption and solubility test, for which only five specimens were prepared. The specimens of energy absorption (10 × 10 × 3 mm) were tested using a Lloyd instruments testing machine. Hardness specimens (38 × 38 × 3) were tested using a shore A durometer and were divided into two subgroups; dry and wet storage.

Results: The specimens of energy absorption (10 × 10 × 3 mm) were tested using a Lloyd instruments testing machine. Sofreliner soft was significantly softer than Molloplast B. GC reline soft was significantly harder than molloplast B. At high loads, sofreliner soft and elite soft relining was significantly more resilient than molloplast B. Mucopren soft was significantly stiffer than Molloplast B. At low loads, all materials showed similarities in stiffness and resilience; the difference between them was insignificant. After one month of immersion, GC reline and mucopren significantly increased hardness values.

Conclusion: In all conditions and at all four-time points, the hardness values for GC Reline soft were the greatest, and hardness values for Sofreliner Soft were the least. Some chairside soft denture lining materials could have similar significant properties to molloplast-B, such as sofreliner soft and elite.

Cases of unusual and complex root canal morphology could be difficult to diagnose and treat. This report describes the diagnosis and management of a rare maxillary right second molar (tooth #17) with two distinct palatal canals. The tooth was diagnosed with irreversible pulpitis and symptomatic apical periodontitis. Non-surgical root canal treatment was performed. Accurate diagnosis and comprehensive treatment of cases with unusual root canal morphology can be achieved by evaluation of periapical radiographs at different angulations, advanced magnification techniques, and the Cone Beam Computed Tomography (CBCT) scanning. Clinicians should be aware that two separate palatal canals could exist in maxillary second molar teeth.

Purpose: To assess the state of mandibular and maxillary third molars in relation to different facial types in a Saudi population using cone-beam computed tomography (CBCT) records.

Patients and methods: A retrospective study was performed on CBCTs. Statistical analysis determined the relationship between impacted maxillary and mandibular third molars and different skeletal facial types. The degree of third molar impaction was evaluated.

Results: A total of 198 CBCTs from subjects were evaluated, with a mean age of 34.2 years. Archer II classification was found to be significantly associated with all skeletal profiles. The incidence of mesioangular impactions in lower third molar showed a notable increase in the brachyfacial group, which was statistically significant.

Conclusion: In conclusion, this study demonstrates that different facial types are associated with the angulation of third molar impactions.

Background: Bioceramic materials (BCMs) are widely used in vital pulp therapy (VPT) for their biocompatibility and bioactivity; however, their mechanical properties are equally important in the clinical outcome of the pulp-capped teeth.

Objective: To carry out an analysis of the research produced on the morphology of the interface between BM and restorative materials (RM) through a systematic review.

Methodology: An electronic search was performed in Scopus, PubMed, and Web of Science until December 9, 2022. The keywords used in combination with truncation and Boolean operators were: (morphology OR filtration OR porosity) AND (silicate OR composite) AND (cement) AND ("pulp capping" OR "vital pulp therapy" OR "vital pulp treatment").

Results: Of the 387 articles initially retrieved from the electronic search databases, 5 articles met the criteria for qualitative data collection. MTA and Biodentine were the most studied BCMs. All the articles used a scanning electron microscope as a method of evaluating the samples. Sample sizes and setting times of RM and BCMs differed between studies. Three out of 5 studies used similar conditions of recorded temperature and humidity of 37°C and 100%, respectively.

Conclusion: The different biomaterials used, the application of adhesive systems, humidity and restoration time affect the bonding performance and the ultrastructural interface between BCMs and RMs. The scarcity of research on this point makes it necessary to delve into it and study new materials to obtain more scientific evidence.

Background: The tongue is known as the mirror of oral and general health. Some diseases may show signs in the tongue. Fissured is approximately an asymptomatic condition characterized by grooves and fissures of varying depth on the dorsal surface of the tongue. Epidemiologically, its prevalence is varied based on different factors, but most of them report 10-20%.

Methods: In the department of oral medicine at Ali-Abad University Hospital of Kabul University of Medical Sciences, a cross-sectional study was conducted among 400 patients. This fissured tongue is first diagnosed based on clinical appearance (fissures) on each side of tongue. Meanwhile, the whole medical and dental histories were taken for the rest of the leading factors.

Results: Out of 400 patients (124 males and 276 females) seen and checked, which 142 cases were fissured tongue [45 (31.7%) males and 97 (68.3%) females]. The fissures were found to be least in the >10 - 19-year age group, 23 (16.3%) and it was most prevalent in the 20 -39 age group, 73 (51.8%), followed by 40 -59, 35 (24.8%) and 60< age group, 10 (7.1%). The most prevalent type of pattern of fissures was found to be superficial, multiple and not connected fissures, 46.32% (33.3% males, 32.3% females), followed by superficial, multiple and connected fissures, 25.5% (26.7% males, 25% females), and whereas 6.4% of patients with (single and deep type of fissure) was the lowest prevalent type of fissured tongue. In our study, more than half of patients asymptomatic (51.6% females and 71.1% males), 17.9% complained from tongue dryness, 14.3% soreness, 6.4% halitosis, 1.4% tongue swelling and 2.1% had all the signs.

Conclusion: The prevalence of fissured tongue was 35.5%. A significant difference between genders was reported with female predominance in all cases observed. The most prevalent age groups were 20-29 and 30-39 in both gender groups. Superficial, multiple, and not connected fissures 46.32% were the most common type of fissure.

Background: Oral diagnosis and surgery education is the main educational subject in dental schools. Due to its importance and the demand to achieve a proper level of training, dental students might have some concerns related to this subject. The study aims to investigate domains related to students' concerns in oral surgery clinics.

Materials and method: An online questionnaire of five domains was circulated to 211 fourth, and fifth-year students. The domains include; the benefit of oral surgery lectures in oral surgery clinic; the importance of oral surgery clinic, what they fear the most during their oral surgery training; difficulty domain, and importance domain. It was distributed to a sample of 211 fourth-, and fifth-year students at the Ibn Sina College of Dentistry, Baghdad, Iraq in January, and February 2022.

Results: In the domain of "benefit of oral surgery lectures in the oral surgery clinic" Half of the respondents think theory lectures are useful. About one-third of the students believe it is essential. The most important item in the domain of "most factors students' fear" was the item of nerve injury (42.1%). Incomplete tooth removal was reported in (32.7%), whereas post-extraction bleeding was reported by (19.2%). In the domain "the most difficult" 71% of students stated that it is dealing with uncooperative patients was the most important item. Similarly, in the domain "the most important" the majority of students reported that correct surgical diagnosis (70.1%) is the most important item, followed by master extraction technique (26.2%), and master anesthesia technique (3.7%).

Conclusion: This study evaluated the "fear", "difficulty", and "importance" domains of students' concerns during oral surgery training. There is a noticeable shift in students' attention toward clinical reasoning compared to the technical aspects of surgical training. This positive shift reflects the perceived importance of diagnosis for proper clinical practice. This needs to be encouraged by the teaching staff.

Purpose: The presence of bone marrow defects of the jawbone (BMDJ) is associated with increased levels of inflammatory cytokines such as RANTES/CCL5. The purpose of this study was to analyze if BMDJ therapy under real-world conditions reduces RANTES/CCL5 serum levels in BMDJ patients.

Patients and methods: During this retrospective study, 113 BMDJ patients received either no treatment (n = 57), BMDJ surgery (n = 25), tooth extraction (n = 20), or root canal treatment (n = 11). Serum concentrations of RANTES/CCL5, C-reactive protein (CRP), and Tumor Necrosis Factor-α (TNF-α) were assessed before and after treatment (interventional group) and at the beginning and end of the study period (control group). Statistical analyses of the results were performed by the two-sample t-test and Bonferroni post hoc test with ANOVA for multiple comparisons.

Results: BMDJ were detected in all patients with 4.42 ± 2.75 BMDJ findings per patient. RANTES/CCL5 levels were significantly reduced by any treatment when compared to no treatment (p < 0.001; effect size d = 0.90). This effect was most pronounced in the BMDJ surgery group (p < 0.001; effect size d = 1.30). In contrast, RANTES/CCL5 serum concentrations further increased in untreated patients. Mean duration between pre- and post-treatment RANTES/CCL5 measurements was 22.86 ± 19.36 weeks, with no correlation with RANTES/CCL5 levels in any interventional group or in the total sample (p = 0.104).

Conclusion: BMDJ surgery, tooth extraction, and root canal treatment significantly reduce RANTES/CCL5 serum concentrations in BMDJ patients, with surgery being most beneficial. Further research is required to establish regular RANTES/CCL5 assessments as part of an improved diagnosis, monitoring, and evaluation of therapy success in BMDJ patients.

Background: Dental implants are currently one of the most preferred treatment modalities for replacing missing teeth, as they are the most comparable to natural teeth. Even so, satisfaction with such treatment may differ depending on patient nature. The aim of this article was to examine the relationships between different anthropometric measurements on dental implant patient's satisfaction.

Methods and material: Self-administered questionnaire (structured questions) were given to patients who had dental implant treatment to evaluate their satisfaction level with dental-implant treatment. Different anthropometric measurements were taken: body height; weight; body mass index (BMI); body composition; waist/hip ratio; and circumferences at the waist, hip, and neck.

Results: The overall BMI was 28.9±4.7 kg/m², there was a highly-significant difference in patient satisfaction among the different BMI groups (P< 0.000). The significant difference in most of those groups was between the obese group and the other groups. For neck circumference and waist/hip ratio, a significance difference between the normal weight and obese groups (P< 0.000) was found, while for percentage of muscle, the differences were between the overweight and obese groups (P< 0.000). According to BMI groups a highly significant difference in many patient satisfaction domains were found (P< 0.000). These significant differences were between the obese group and non-obese groups for most aspects of patient satisfaction. For patient satisfaction with final appearance, the normal BMI group differed significantly from the overweight BMI group (P=0.013). Additionally, for patient satisfaction with dentist performance and communication, the overweight BMI group showed significantly higher satisfaction than the normal BMI group (P=0.019). Body measurements were correlated negatively with overall patient satisfaction, and positively with satisfaction with prosthesis.

Conclusion: The obese group patients had the lowest rate of patient satisfaction. BMI and other body measurements can be used to predict patient satisfaction with the outcome of dental implant treatment.

Background: Overdentures supported by dental implants are a useful treatment strategy for patients with edentulous mandibles. The aim of this study was to evaluate certain characteristics of the mandibular symphyseal edentulous cases for dental implant treatment using CBCT; and if it is associated with gender differences.

Methods: Ninety patients (45 females and 45 males) were included in this investigation. A section along the midline of each CBCT image was chosen for the edentulous symphyseal area. Symphysis height, width, and cortical thickness was measured for each patient. Bone density were calculated at four points A two-sample Student's t-test and Pearson correlation were used for statistical analysis.

Results: Males had a considerably greater symphysis height (26.66±6.21 mm) than females (24.07±5.00 mm) (p = 0.02). Similar results were found for bone width; males had greater means than females. In case of cortical bone thickness; males had thicker bone cortex in the buccal region than females (p = 0.01). While the difference in bone density between genders was small. However, a positive relationship was recorded between symphysis height and width.

Conclusion: Height and width of the mandibular symphysis were influenced by gender in edentulous patients, with men showing higher measurements. The reduction of symphyseal height decreased concurrently with the width after teeth were lost, while bone density was maintained in both genders with no difference between them. The lingual cortical bone is significantly thicker than the buccal cortex at the lower part of the symphysis.

Purpose: Acute dental pulp inflammation necessitates early treatment to alleviate inflammation and pain. In the inflammatory phase, a substance is required to lower the inflammatory mediators and reactive oxygen species that play a crucial role in that phase. Asiatic acid is a natural triterpene obtained from the Centella asiatica plant with a high antioxidant value. This study examined the effect of Asiatic acid's antioxidant, anti-inflammatory, and antinociceptive properties on dental pulp inflammation.

Methods: The research is an experimental laboratory, with a post-test only with a control group design. The study utilised 40 male Wistar rats weighing 200-250 grams and aged 8-10 weeks. Rats were divided into five groups (control, eugenol, Asiatic Acid 0.5%; 1%; 2% group). Dental pulp inflammation was created in the maxillary incisor after six hours of administration of lipopolysaccharides (LPS). The dental pulp treatment then continued with the administration of eugenol and three different Asiatic acid concentrations (0.5%, 1% and 2%). In the next 72 hours, the teeth were biopsied, and the dental pulp was analysed using the enzyme-linked immunosorbent assay (ELISA) to measure the level of MDA, SOD, TNF-α, beta-endorphins and CGRP. Histopathological examination and the Rat Grimace Scale were utilised to determine the level of inflammation and pain, respectively.

Results: The effect of Asiatic Acid on MDA, TNF-α, and CGRP levels decreased significantly compared to the control group (p=<0.001). On the SOD and beta-endorphin levels, Asiatic acid treatment resulted in a considerable rise (p =<0.001).

Conclusion: Due to its antioxidant, anti-inflammatory, and antinociceptive characteristics, Asiatic acid can reduce inflammation and pain in acute pulp inflammation due to its ability to decrease MDA, TNFα, and CGRP levels while raising SOD and beta-endorphin levels.