Journal of Contemporary Dental Practice最新文献

Aim: The present study aimed to evaluate the impact of thermocycling on three different orthodontic clear aligner materials shear strength.

Materials and methods: A total of 60 samples, i.e., 20 samples from each of the clear aligner materials, were prepared. Group A: Duran, group B: EasyDu, group C: Zendura. A 3D-printed mold and BIOSTAR were used in a thermoforming procedure to create the samples. By exposing the samples to thermocycling, the aging process was replicated. Clear aligners were subjected to 14 thermal cycles per day; each aligner process was carried out for a duration of two weeks. A universal testing machine was used to measure the shear strengths of the samples at baseline and after 14 days. Data was recorded and statistically analyzed.

Results: At baseline, the mean shear strength of the Duran material group was 10.06 ± 1.34, the EasyDu material group was 9.98 ± 2.24, and the Zendura material group was 10.02 ± 1.62. And no significant difference was obtained between these three different clear aligner materials. After thermocycling, the mean shear strength was slightly reduced in the Duran material group, i.e., 8.36 ± 0.42, followed by the Zendura material group was 6.28 ± 0.76, and the EasyDu material group was 5.08 ± 1.26. A significant difference was obtained between these three different clear aligner materials.

Conclusion: In conclusion, the Duran clear aligner material group showed significantly superior shear strength after thermocycling compared to Zendura material and the EasyDu clear aligner material group.

Clinical significance: In orthodontic therapy, the aligner is becoming a preferred esthetic substitute for fixed labial braces all around the world. It is essential to use the best aligner material available to provide consistent pressures for tooth displacement. The overall effectiveness of therapy may be impacted by the loss of certain qualities brought on by processes like manufacture and intraoral use. How to cite this article: Ray S, Vannala V, Sam G, et al. Evaluation of the Impact of Thermocycling on Different Orthodontic Clear Aligner Materials Shear Strength: An In Vitro Study. J Contemp Dent Pract 2025;26(9):868-871.

Aim: To evaluate the prevalence of anatomical variations in completely edentulous patients concerning incisive papilla prominence, labial frenum attachment, and ridge relation and their correlation with age and gender.

Materials and methods: A retrospective study was conducted using data from 8,600 patients from June 2022 to March 2025 were screened, and 512 complete denture patients with photographic evidence were analyzed. Incisive papilla was categorized as prominent or nonprominent. Labial frenum attachment was classified as class I, II, or III. Ridge relation was assessed as class I, II, or III. Statistical analysis was performed using IBM SPSS (version 23.0) to assess correlations between anatomical features, age, and gender.

Results: The mean age of the study population was 64.5 ± 10.2 years, with 282 (55%) males and 230 (45%) females among the 512 completely edentulous patients. A significant correlation was found with age (p < 0.001), showing that incisive papilla flattens with age. Class II was most prevalent in 261 (51%) patients, followed by class I in 169 (33%) and class III in 82 (16%). A significant association was found between labial frenum type and gender (p = 0.039). Class II ridge relation was most common in 266 (52%) patients, followed by class I in 154 (30%) and class III in 92 (18%). A significant correlation was observed between ridge relation and gender, with class I more prevalent in the 61-70 age-group.

Conclusion: In the present study, incisive papilla prominence decreases with age, and class II ridge relation and labial frenum attachment are the most common.

Clinical significance: Understanding the correlation between age, gender, and anatomical variations in completely edentulous patients helps clinicians anticipate potential challenges during prosthodontic rehabilitation. Knowledge of these variations, aids in better treatment planning, improving denture fit, stability, and patient satisfaction. How to cite this article: Britina G, Rajaraman V, Bhattu BK, et al. Correlation of Age and Gender with Anatomical Variations in Completely Edentulous Patients and Their Clinical Implications in Prosthodontic Treatment Planning: A Retrospective Study. J Contemp Dent Pract 2025;26(9):854-859.

Aim: The purpose of this study was to evaluate a new surgical concept with new tools utilized for crestal sinus elevation to determine the incidence of sinus membrane perforation during surgery. A completely new approach, associated with new instruments, allows sinus bone grafting in all cases of atrophy of the posterior maxilla.

Background: Crestal sinus augmentation is frequently required for implant placement in the maxillary molar sites to provide sufficient crestal height to permit implant placement. This is performed in conjunction with implant placement at the same surgical appointment but has the potential for sinus membrane perforation and may be technique sensitive for some practitioners. The technique and instrumentation discussed in the article simplify the procedure and greatly diminish the potential of sinus perforation during treatment. Clinical technique: Two Kits are discussed, with Kit A utilized to treat maxillary atrophy presenting less than 4 mm of sub-sinus bone height, and Kit B to treat maxillary atrophy presenting more than 4 mm of sub-sinus bone height. The technique involves minimally invasive, simple surgery, using a very precise protocol and instrumentation to permit sinus elevation via a crestal approach, to eliminate sinus membrane perforation potential.

Discussion: The results of this article focused on 100 cases for Kit A and 300 for Kit B, obtaining 97% success in avoiding sinus membrane perforation.

Conclusion: Transcrestal sinus elevation provides a very good alternative utilizing the All Secure Sinus Elevation Kit (ASSEK) A compared to older techniques that have proven themselves to have associated complications, including sinus membrane perforation. The ASSEK B allows you to perform a Summer's sinus elevation approach in direct vision for added safety Clinical significance: The design of the Kit's components avoids any complications of sinus membrane perforation. The Kit uses a minimally non-invasive surgery, avoiding any healing complications that present with more extensive surgical approaches. Sinus augmentation is frequently required for implant placement in the maxillary molar sites, especially when ridge resorption has occurred. The technique and instrumentation discussed provide a simpler surgical procedure to achieve increased crestal height with significantly decreased sinus perforation potential. How to cite this article: Baranes D, Le Gal RZ, Kurtzman GM, et al. A Simplified Approach for Sinus Augmentation to Avoid Sinus Membrane Perforation: An Analysis of 400 Cases. J Contemp Dent Pract 2025;26(9):924-929.

Aim: This study aimed to compare the canal centering ability (CCA) of a single-file retreatment system and a multiple-file retreatment system, with and without the use of gutta-percha (GP) solvent.

Materials and methods: Twenty extracted human mandibular molars with a canal access angle (CAA) of 20-40° were selected and treated endodontically. Samples were equally distributed into two groups, group I (10): HyFlex Remover, group II (10): ProTaper Universal Retreatment File, with two subgroups of five samples each: With solvent, without solvent. Retreatments were performed according to the manufacturer's instructions. Cone-beam computed tomography (CBCT) was used to evaluate CCA in coronal, apical, and middle thirds. Data were analyzed using an independent Student's t-test (p < 0.05).

Results: Group I, with p-values of 0.001 at 3 mm, 0.024 at 6 mm, and 0.041 at 9 mm, showed significantly better centering ability than group II at all levels when xylene was used. Without xylene, both groups performed similarly in the apical and middle thirds, but group I outperformed group II at the coronal third (p = 0.001).

Conclusion: HyFlex Remover demonstrated superior CCA across all root canal levels, regardless of solvent use. However, xylene significantly improved the performance of the ProTaper system at the apical and coronal thirds.

Clinical significance: Endodontic retreatment poses challenges in maintaining canal anatomy while removing obturating materials. This study was necessary to evaluate the CCA of single- vs multiple-file retreatment systems, with and without solvent use. Findings showed HyFlex Remover maintained superior centering ability, minimized solvent dependence, and provided clinicians with a safer, more reliable option for retreatment. How to cite this article: Gnanasekaran S, Rajakumaran A, Kalaiselvam R, et al. Comparative Evaluation of Canal Centering Ability of Single-file Retreatment System vs Multiple-file Retreatment System, with and without Gutta-Percha Solvent: An In Vitro Study. J Contemp Dent Pract 2025;26(9):898-903.

Aim: To evaluate the effect of adding Aloe Vera nanoparticles encapsulated by chitosan nanospheres on glass ionomer for antibacterial activity and solubility.

Materials and methods: Forty samples were used in the study and divided into two groups according to the test (n = 20) for each group. The antibacterial activity of each group was tested using the agar diffusion test. The samples were dried in a desiccator for the solubility test until a constant weight was achieved. Then, the dried samples were weighed accurately using an analytical balance. This record is the initial weight (W1). Then, the samples were immersed in distilled water at a controlled temperature for 1 hour, 24 hours, and 7 days. The samples were weighed again to determine the weight after sorption.

Results: The average inhibition zone diameter was 0.050 ± 0.009 mm for the control group and 3.44 ± 0.107 mm for the 15% GI-Aloe Vera (ECnS) group. This difference was statistically significant. Regarding solubility, the difference between groups was statistically significant (p = 0.000). At 1 hour, control recorded 0.714 ± 0.106, while GI-Aloe Vera (ECnS) 15% recorded a lower value of 0.504 ± 0.075. At 24 hours, control recorded (0.950 ± 0.142), while GI-Aloe Vera (ECnS) 15% recorded a lower value (0.670 ± 0.100). On day 7, the control recorded 1.187 ± 0.177, while GI-Aloe Vera (ECnS) 15% recorded a lower value of 0.838 ± 0.125.

Conclusion: Incorporating Aloe Vera nanoparticles improved the microbiological properties by inhibiting the growth of Streptococcus mutans (S. mutans) on the glass ionomer cement (GIC) and reducing solubility, making them more durable and effective for dental restorations.

Clinical significance: The incorporation of Aloe Vera nanoparticles encapsulated by chitosan nanospheres significantly enhanced the antibacterial properties of GIC against S. mutans and reduced solubility, potentially improving the material's clinical performance and longevity. How to cite this article: Elzoka AH, El Saeed SA, Abogabal AD, et al. Effect of Incorporation of Aloe Vera Nanoparticles Encapsulated by Chitosan Nanospheres on Antibacterial Properties and Solubility of Glass Ionomer. J Contemp Dent Pract 2025;26(9):860-867.

Aim: This cross-sectional study aimed to assess and compare the oral health attitudes of preclinical and clinical dental students at Cordoba Private University in Syria using the Hiroshima University-Dental Behavior Inventory (HU-DBI) questionnaire, while also examining differences by gender and specific questionnaire items to identify behavioral patterns that could guide future educational improvements.

Materials and methods: A total of 331 students participated, with the first 3 academic years classified as preclinical (187 students) and the final 2 years as clinical (144 students). The 20-item HU-DBI questionnaire in a paper-based format (hard copy) assessed oral health attitudes and behaviors with agree/disagree responses. Scores range from 0 to 19, with higher scores reflecting better oral health behavior. One point was awarded based on specific agree/disagree responses. Data were analyzed using the Kolmogorov-Smirnov test, Chi-square test, and Mann-Whitney U test. A p-value of < 0.05 was considered statistically significant.

Results: No significant difference in mean score between the two groups was analyzed; however, clinical (advanced years) students exhibit significantly better behaviors in certain key areas, such as frequent brushing (p = 0.001), brushing professionally (p = 0.001), and eating less sweets (p = 0.003), compared to preclinical students, indicating positive effects of dental education in those domains.

Conclusion: Clinical students exhibit significantly better behaviors in certain key areas, such as frequent brushing, brushing professionally, and eating fewer sweets, compared to preclinical students. However, many other aspects of oral health attitude did not differ notably between junior and senior students, and worrisome habits like increased heavy smoking in the clinical years were identified.

Clinical significance: Understanding the evolution of dental students' oral health attitudes is essential, as they serve as future role models. While education improves certain behaviors, the persistence of negative habits like smoking highlights the need for targeted interventions in the curriculum. How to cite this article: Kassem R, Toama M, Alyousif Aldaiea MZ, et al. Assessing Oral Health Attitudes among Preclinical and Clinical Dental Students: A Cross-sectional Study at Cordoba Private University, Syria. J Contemp Dent Pract 2025;26(8):738-742.

Aim: To solve the enamel demineralized lesion, a novel orthodontic adhesive that can regularly release phosphate ion (PO₄^-3) was developed; to study the interaction of nanofiller concentration, storage time, and immersion media pH are the main objectives of this study.

Materials and methods: Nanohydroxyapatite powder was prepared by sol-gel method. A transmission electron microscope was used to study the structural properties of this material, which was then mixed with Heliosit orthodontic adhesive at 2% and 4% by weight. Fifty-four cylindrical samples for each nanoparticle concentration were prepared and divided equally into 18 groups (three in each group). Each was immersed in 3 mL deionized water with pH (4, 7, and 9) for six time points (1, 3, 5, 7, 14, and 21) days. Released ion concentrations were measured using atomic absorption (AA) spectrometry.

Results: The maximum amount of ion release was recorded for the sample immersed in deionized water at pH 7 on the first and fifth days of the study. Although pH 9 showed intermediate or sometimes high values at certain time points.

Conclusion: This study demonstrated that time, nanoparticle concentration, and pH significantly affect ion release. With 2% nano hydroxyapatite particles at pH 7 showed the highest ion release overall. Future research should explore the effects of other circumstance factors that may influence ion release mechanics, such as temperature, curing time, and sample surface area, in order to optimize critical ion release for these sensitive drug delivery systems.

Clinical significance: Nano hydroxyapatites are biomaterials that can be recommended as a remineralizing agent as they act as a reservoir of crucial ions, Ca and PO₄^-3. How to cite this article: Hasan LA, Dewachi Z, Alhamdani AAQ, et al. Ion Release from Nanohydroxyapatites-reinforced Orthodontic Adhesive: An In Vitro Study. J Contemp Dent Pract 2025;26(8):721-726.

Aim: This article aims to evaluate and compare the marginal adaptation of inlay/onlay restorations produced through digital and conventional techniques.

Materials and methods: A systematic electronic literature search was performed using two primary databases, Medline (via PubMed) and ScienceDirect, to identify relevant publications on the research subject. The selection of articles followed strict inclusion and exclusion criteria to ensure relevance and quality. A manual search was also carried out to ensure the comprehensiveness of the review. In order to obtain recent results, only articles published after 2014 were included in the review.

Results: Out of the initial 211 articles identified, 204 were excluded due to duplication, language restrictions, or failure to meet the inclusion criteria. A total of seven studies were included in the final analysis, comprising six in vitro studies and one in vivo study. Among them, five studies employed the replica technique to measure the marginal gap, one used an optical stereomicroscope, and one utilized computed tomography. The QUIN tool was used to assess the risk of bias.

Conclusion: Digital techniques demonstrate significant potential for improved marginal adaptation, yet further research is essential to conclusively validate their superiority over conventional approaches.

Clinical significance: This review highlights the importance of digital techniques in enhancing dental restorations, particularly the marginal adaptation of the indirect restorations. This evaluation is important, as marginal fit significantly impacts the longevity and clinical success of these restorations. How to cite this article: Jebali C, Riahi Z, Kalghoum I, et al. Dental Marginal Adaptation of Inlay/Onlay Restorations Fabricated with Digital and Conventional Techniques: A Systematic Review. J Contemp Dent Pract 2025;26(8):806-813.

Aim: To analyze the bibliometric characteristics of the world scientific production on oral health in the puerperium Materials and methods: The descriptive study with a bibliometric approach, which had as sample 146 original articles on oral health during puerperium indexed in Scopus. Metadata were used to create co-authorship and co-occurrence networks with VOSviewer and to estimate bibliometric indicators with SciVal.

Results: Universidade Federal do Maranhão and Universidade Estadual de Feira de Santana are among the most productive institutions, although the National University of Singapore has the highest average number of citations per publication. Gomes-Filho Isaac Suzart and Alves Cláudia Maria Coêlho, both from Brazil, lead this field of research with eight and six publications, respectively. The International Journal of Environmental Research and Public Health is the best positioned, although the Maternal and Child Health Journal has the best impact. Brazil and the United States are the countries with the highest concentration of publications and, at the same time, have a strong cooperation link. The main type of collaboration in scientific production is national (45.9%).

Conclusion: The scientific production on oral health in the puerperium shows a growing trend and is published especially in Q1 and Q2 quartile journals. There are emerging collaborative networks, with the United States and Brazil as the most representative countries, although international collaboration is still a pending task.

Clinical significance: The puerperium period is an important challenge for the care of oral health-related problems, given the physiological and anatomical changes produced previously in pregnancy. How to cite this article: Lucana JM, Huachin NRA, Barja-Ore J. Oral Health after Childbirth: A Bibliometric Exploration of Global Scientific Production. J Contemp Dent Pract 2025;26(8):814-819.

Aim: The purpose of the present investigation was to evaluate the effect of using hyaluronic acid (HA) gel to reduce postoperative complications following the extraction of impacted mandibular third molar.

Materials and methods: Fifty patients who required extraction of impacted mandibular third molars with the same difficulty level were included in the present study. Following the surgical removal of impacted mandibular third molar, patients were assigned to the following groups (n = 25)-group I: Control group-only saline irrigation, group II: Study group-saline irrigation followed by placement of HA gel in the socket. Patient satisfaction was assessed in both groups, along with measuring mouth opening and recording pain on the first, fifth, and seventh postoperative days. All information gathered was statistically analyzed.

Results: Overall, while only seven patients were very satisfied in group I, 13 patients were very satisfied in group II. On the 1st day, mouth opening was 30.13 ± 0.12 and 30.79 ± 0.08 in group I and group II, respectively. On the fifth day, it was 33.41 ± 0.09 and 35.83 ± 0.05 in groups I and II, and on the 7th day, it was 35.23 ± 0.03 and 37.33 ± 0.04 in groups I and II, respectively. On pain assessment, on the 1st day, slight pain was experienced by 9 and 12 patients in group I and group II, respectively. On the fifth day, slight pain was reported by 10 and 15 patients in groups I and II, and on the 7th day, only one patient in group I reported no pain, while three reported no pain in group II, respectively. The significant difference in patients' pain was noted on the fifth and 7th days between the two groups.

Conclusion: In conclusion, HA gel is efficient in the treatment of trismus and pain reduction after the removal of impacted mandibular third molar.

Clinical significance: Hyaluronic acid is a significant carbohydrate element of the extracellular matrix, found throughout connective, epithelial, and neural tissues. Because HA is used to improve healing after dental procedures, it has recently acquired popularity as an adjuvant therapy for minor oral surgeries. How to cite this article: Varghese LJ, Lahiri B, Nasyam FA, et al. Efficacy of Hyaluronic Acid Gel Application for Reduction of Postoperative Complications after Removal of Impacted Mandibular Third Molar. J Contemp Dent Pract 2025;26(8):780-783.