Current Issue : April-June Volume : 2025 Issue Number : 2 Articles : 5 Articles
Background/Objectives: This study investigates the temperature changes on the external root surface during root canal preparation using different rotary systems and assesses the impact of irrigation temperatures. Methods: Sixty extracted human maxillary incisors were divided into four groups based on the rotary system used: ProTaper Next (Dentsply Sirona, Ballaigues, Switzerland), Reciproc Blue (VDW GmbH, Munich, Germany), WaveOne Gold (Dentsply Sirona, Ballaigues, Switzerland), and TruNatomy (Dentsply Sirona, Ballaigues, Switzerland). These systems differ in cutting efficiency and design. Temperature measurements during instrumentation and irrigation were recorded using a FLIR E60bx thermal camera (Teledyne FLIR LLC, Hudson, NH, USA). Irrigations were conducted with sodium hypochlorite at room temperature and heated to 60 ◦C. Results: The ProTaper Next group exhibited the highest average temperature increase during instrumentation (5.2 ◦C), followed byWaveOne Gold (4.3 ◦C), Reciproc Blue (3.7 ◦C), and TruNatomy (2.8 ◦C). During irrigation with heated sodium hypochlorite, temperature rises recorded were 6.8 ◦C for ProTaper Next, 5.9 ◦C for WaveOne Gold, 5.2 ◦C for Reciproc Blue, and 4.1 ◦C for TruNatomy. Statistical analysis revealed a significant negative correlation between dentin thickness and temperature rise, with rvalues ranging from −0.62 to −0.87 across the groups. No significant correlation was found between canal diameter and temperature change, indicating that the canal’s size does not influence the thermal impact as much as the properties of the rotary system and irrigation temperature. Conclusions: Different rotary systems produce varying levels of temperature increases on the external root surface, influenced significantly by the thickness of the dentin and the temperature of the irrigation solution. These variations necessitate careful selection of instrumentation and irrigation protocols to minimize potential thermal damage to surrounding periodontal tissues....
Background/Objectives: The purpose of this study was to measure the bone thickness and angulation of the maxillary and mandibular anterior teeth on the buccal and palatal/lingual sides and also to analyze the sagittal root position (SRP) in the alveolar bone in relation to age and gender using cone-beam computed tomography (CBCT) in an Iraqi subpopulation. Methods: CBCT images of 1200 maxillary and mandibular central and lateral incisors and canines from 100 patients (48 males and 52 females) were retrospectively analyzed. These patients were categorized by age into group I ≤ 25, group II 26–40, and group III ≥ 41 years old. The SRP in the alveolar bone was classified as class I, class II, class III, and class IV, and the buccal type was further classified into subtypes I, II, and III. In addition, the buccolingual inclination of the tooth and buccal/palatal/lingual bone thickness at the coronal, middle, and apical thirds were evaluated and then compared based on age and gender. The data were analyzed using the Pearson chi-square test. Descriptive statistics, Kruskal–Wallis and Mann–Whitney U test were used to compare the thickness and angulation according to the SRP classes. Results: The mean frequency distribution of SRP of maxillary anterior teeth indicated that most of them were located buccally and were classified as (Class I) and subtype (III). Moreover, for mandibular anterior teeth, the majority were classified as (Class IV) and subtype (II). The mean sagittal angulation of maxillary anterior teeth approximately ranged from 5.9 for tooth 12# to 8.2 for teeth 13# and 23#, while for mandibular anterior teeth it ranged from 7.4 for tooth 33# to 10.3 for tooth 41#. The thickness of bone in the apical third of the buccal side of all maxillary and mandibular teeth was significantly related to age (p < 0.05). In the middle third, the thickness of bone in the buccal and palatal side of all maxillary anterior teeth and in the apical third of most mandibular teeth in the lingual side was significantly higher in males (p < 0.05). Conclusions: A majority of the maxillary anterior tooth roots were positioned close to the buccal cortical plate, while most of the mandibular anterior teeth were engaging both the buccal and lingual cortical plates. Males had more alveolar bone thickness for both maxillary and mandibular anterior teeth, and only the apical portion significantly changed with age. CBCT of the buccal and palatal/lingual bone and SRP is recommended for the selection of the appropriate treatment approach and implant placement....
Objectives: To assess the prevalence of systemic pathologies associated with periodontal diseases to determine multimorbidity patterns and risk factors for periodontal care. Methods: A single-center cross-sectional study analyzed patient records from 1 January 2019 to 31 December 2021 at the Department of Periodontology, part of the Dental Service of a hospital-based dental school in Lyon, France. The anonymized data included patient-reported medical history (questionnaire) and billing for periodontal procedures. Data were compared between patients in the Department of Periodontology and from Other Departments of the Dental Service. The association between clinically relevant pathologies, as defined as multimorbidity, and admission in the Department of Periodontology were assessed with logistic regression. Prevalences between the Department of Periodontology and the Other Departments of the Dental Service were compared with chi-squared tests. Relationship among pathologies was described through correlation analysis. Statistical analyses were conducted using R software with a significance level set at p < 0.05. Results: This study included records of 20,945 patients in the Dental Service with 1205 periodontal procedures performed in the Department of Periodontology. Patients admitted for periodontal care were older and mostly female (p-value < 0.001). The most frequent systemic pathologies were hypertension and diabetes in the Department of Periodontology. Hypertension associated with diabetes was the most frequent multimorbidity pattern, while the most frequent triad of multimorbidity was hypertension/diabetes/cardiac rhythm disorders. Patients with diabetes had a 1.49 times higher likelihood of admission to the Department of Periodontology (OR = 1.49 [1.20; 1.86]), with age also being a significant risk factor but with a smaller effect size (OR = 1.02 [1.01; 1.03]). Conclusions: Within the limitations of this study, hypertension, diabetes, cardiac rhythm disorders, and chronic renal insufficiency were identified as prevalent multimorbidity in the Department of Periodontology. Multimorbidity including diabetes seems to constitute a risk factor requiring periodontal care....
Tooth fractures represent a very common scenario, mainly among children and young adults, thus affecting permanent dentition most of the time. These fractures may involve either the tooth crown or the root or both, including the dental tissues as well. Their treatment can be very demanding for the majority of dentists, including Restorative Dentistry specialists, as reported by the literature. Therefore, the aim of this review article is to provide a decision-making procedure regarding the periodontal-restorative approaches of dental fractures in permanent dentition, based on the revision of the existing scientific evidence....
Background: Traditional methods for palatal expansion using fixed appliances often face limitations in comfort and aesthetics. In comparison, aligner therapy has limitations, particularly regarding maxillary expansion. The aim of this study is to examine the biomechanical properties regarding the wire diameter and bending of different stainless steel wires to evaluate their potential for incorporation into maxillary aligner therapy. Materials and Methods: Three rectangular stainless steel wires (0.016 × 0.022, 0.017 × 0.025, and 0.019 × 0.025) were tested for mechanical expansion forces in the intermolar region, comparing non-tooth-shaped bent wires (A groups) and tooth-shaped bent wires (B groups). Using a Z010 testing machine (ZwickRoell GmbH and Co. KG, Ulm, Germany), expansion forces were measured at 1 mm intervals over a 5 mmdistance, with 15 samples analyzed per group. Statistical analyses included the Shapiro–Wilk test for normal distribution, the Mann–Whitney U test, which revealed significant results (U = 225, p < 0.001), and the Kruskal–Wallis test, which indicated significance (H = 39.130; df = 2; p < 0.001). Results: Tooth-shaped bent wires exhibited significantly lower expansion forces than non-tooth-shaped bent wires for all tested wire types. This difference was most notable in wires with larger transverse profiles (0.019 × 0.025), where the tooth-shaped bent wires displayed a marked reduction in mechanical load capacity. Specific force measurements for non-tooth-shaped wires ranged from 760.61 ± 79.51 mN at 1 mm of deformation to 2468.46 ± 66.27 mN at 5 mm of deformation, while tooth-shaped wires ranged from 116.80 ± 3.74 mN to 1979.49 ± 23.23 mN. Conclusions: These findings suggest that non-tooth-shaped bent wires offer a more efficient and uniform expansion potential for maxillary movements due to their stable elastic properties. Clinically, integrating non-tooth-shaped stainless steel wires into aligner therapy may provide a viable method for maxillary expansion, supporting both first- and second-order movements in orthodontic treatment. Further research is needed to explore the integration of such wires for effective maxillary expansion in aligner therapy....
Loading....