Occurrence and Timing of Complications of Crown-Fractures in Permanent Incisors: A Randomized Clinical Trial

Objective: To investigate the complications of crown fractures that might occur in different follow-up periods. Material and Methods: Individuals within the 6-13 age range with crown fracture and consulted to University Hospital were included in the study. Patients were randomly divided into three groups by block randomization method and evaluated clinical and radiographically for complications at the 6, 8 weeks, and 6, 12, 24 months. The crown of the tooth was divided into 9 equal squares and 6 classes of fracture types were created. Complications and their frequencies were evaluated based on the post-traumatic substance losses in these illustrated fracture types. Results: The incidence of complications was 28.9% at 6 months, 51.3% at 1year, and 63.9% at 2years. Class4 fractures had the highest probability of complications (32.4%) and the development of pulp necrosis (40.3%). It was detected that the complications such as pulp necrosis (21.6%) can be frequently observed in the 2nd year or later periods of crown fractures. Conclusion: In addition to current regular checks, periodic follow-up of crown fracture should be extended to reflect current findings. Dentists, patients, and their parents must be made conscious of the importance of the treatment and follow-ups of crown fracture

Effects of Platelet-Rich Plasma and Platelet-Rich Fibrin Usage in Regenerative Endodontic Treatments: An Analysis of Root Length and Dentin Thickness

Background: Regenerative endodontic treatment aims to relieve symptoms and maintain root development and regeneration of pulp tissue. This study aimed to retrospectively examine and compare the use of platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) in the regenerative endodontic treatment (RET) of immature necrotic teeth in terms of clinical and radiographic treatment results. Materials and Methods: This study included patients who underwent Regenerative Endodontic Treatment (RET) at Selcuk University Faculty of Dentistry between 2014 and 2019, totalling 38 cases. After apical bleeding is induced into the canal, PRP was utilized in 16 cases, while PRF was employed in 22 cases during the treatments. The changes in root length and dentin thickness were calculated by measuring the radiographs with the help of Image J software. The success rates of the treatments were evaluated in the range of 0-3 points based on the scoring index of Bezgin et al. Changes in root length and dentin thickness, apical closure, and success score were compared statistically in PRP and PRF treatment methods. Results: There was no statistically significant difference between the group who had treatment with PRP and those who had treatment with PRF in terms of apical closure, root length increase, and success scoring, but there was a significant difference in terms of increased dentin thickness. Conclusions: The use of PRP and PRF in RET showed similar results in terms of treatment success. Both treatment groups showed an increase in dentin thickness and root length

Occurrence and Timing of Complications of Crown-Fractures in Permanent Incisors: A Randomized Clinical Trial

Objective: To investigate the complications of crown fractures that might occur in different follow-up periods. Material and Methods: Individuals within the 6-13 age range with crown fracture and consulted to University Hospital were included in the study. Patients were randomly divided into three groups by block randomization method and evaluated clinical and radiographically for complications at the 6, 8 weeks, and 6, 12, 24 months. The crown of the tooth was divided into 9 equal squares and 6 classes of fracture types were created. Complications and their frequencies were evaluated based on the post-traumatic substance losses in these illustrated fracture types. Results: The incidence of complications was 28.9% at 6 months, 51.3% at 1year, and 63.9% at 2years. Class4 fractures had the highest probability of complications (32.4%) and the development of pulp necrosis (40.3%). It was detected that the complications such as pulp necrosis (21.6%) can be frequently observed in the 2nd year or later periods of crown fractures. Conclusion: In addition to current regular checks, periodic follow-up of crown fracture should be extended to reflect current findings. Dentists, patients, and their parents must be made conscious of the importance of the treatment and follow-ups of crown fracture

Orginal reseach article Effects of adhesive systems applied under fissure sealants to microleakage and shear bond strength

The aim of this study was to examine the effectof bonding agents under fissure sealants on bond strengthand microleakage.MATERIALS ANDMETHOD: A total of 210 freshly extracted noncarious human third molar teeth were used (105 teeth forshear bond strength and 105 teeth for microleakage assessment). The teeth were randomly assigned to 14groups, with 15 teeth in each group. Fissurit FX was applied to the etched enamel in the control groups. In the experimental groups, the self-etch adhesives: Clearfil SEBond, G Bond, Clearfil DC Bond and the total-etch adhesives: Prelude, Adper Single Bond and Optibond S wereapplied and light-cured followed by the subsequent application and light-curing of Fissurit FX. Shear bond strengthwas tested to failure in a universal testing machine with a1 mm/min crosshead speed. The shear bond strength datawas analyzed by using One Way ANOVA and Tukey HSDtests. Microleakage was evaluated by using a dye penetration method after mechanical loading and thermocycling. The microleakage data was analyzed by using theKruskal-Wallis and Tamhane tests.RESULTS: The microleakage of the Adper Single Bond Plusgroup was significantly less than that of the control group(p>0.05). However, the shear bond strength value of theAdper Single Bond Plus group was significantly less thanthat of the control group, again. The shear bond strengthvalue of Clearfil SE Bond was significantly greater thanthat of the control group (p>0.05).CONCLUSION: Clearfil SE Bond improved the shear bondstrength, and Adper Single Bond Plus decreased the m

Effect of new innovative restorative carbomised glass cement on intrapulpal temperature rise: an ex-vivo study

Abstract This study aimed to evaluate the temperature changes that occurred in the pulp chamber when using GCP Glass Carbomer Fill (GCP) and two different resin-modified glass-ionomer (RGI) restorative materials at different dentin thicknesses. A standardized Class I occlusal cavity with 1 mm or 2 mm dentin thickness was prepared in the extracted human molar teeth. RGI and GCP fills were placed in the cavities and cured with two different light-curing units. This study included a total of 120 samples, with 20 samples in each group. The pulp microcirculation method was used for measuring the intrapulpal temperature changes. Statistical analysis was performed using the two-way ANOVA and Tukey HSD multiple comparison tests. Statistically significant differences were observed between 1 mm and 2 mm dentin thicknesses (p < 0.001). The GCP groups (both 1 mm and 2 mm dentin thicknesses) exhibited higher temperatures than the other groups (p < 0.001), and Fuji II LC and Photac Fil Quick Aplicap showed similar values (p > 0.05). The highest temperature changes were observed with 1 mm dentin thickness. While RGI materials in both dentin thicknesses did not cause temperature changes that were harmful to the pulp, GCP CarboLED LCU caused the highest intrapulpal temperature rise, and these values were borderline harmful to the dental pulp

Effect of alternative modes of application on microleakage of one-step self-etch adhesives

AbstractBackground/purposeContemporary one-step self-etch adhesives are certainly the most user-friendly adhesives; however, typically could not compete with the more traditional multi-step adhesives. This in vitro study evaluated the efficacy of two modes of application (double application or placement of a hydrophobic resin coating) for the reduction of microleakage, using three different one-step self-etch adhesives (AdheSE One VivaPen, Ivoclar Vivadent, Schaan, Liechtenstein; Xeno V, Dentsply De Trey, Konstanz, Germany; OptiBond All-In-One, Kerr Italia S.r.l, Scafati, Italy).Materials and methodsWe prepared Class V cavities with the occlusal margin in enamel and gingival margin in dentin on both buccal and lingual surfaces of 108 human molar teeth. Cavities were divided into nine groups according to the combination of adhesives and application modes used (n = 24). For applying adhesives, we followed three types of procedures: (1) according to the manufacturers’ directions; (2) using a double-application method; and (3) with the additional placement of a hydrophobic resin layer after following the manufacturers’ directions. We restored the cavities with a composite resin. After thermocycling (500 cycles at 5°C/55°C) and immersion in 0.5% basic fuchsin, we sectioned the teeth and evaluated them for microleakage using a stereo microscope (20×). Enamel and dentin margins were scored separately, and we analyzed the data using Kruskal–Wallis, Bonferroni-corrected Mann–Whitney U, and Wilcoxon signed-rank tests.ResultsApplication of a hydrophobic resin over the cured Xeno V adhesive decreased the amount of microleakage at the enamel margins, compared with the application according to the manufacturer’s instructions (P = 0.005). Both application modes decreased the amount of microleakage at the dentin margins with AdheSE One VivaPen adhesive, compared with application according to the manufacturer’s instructions (P < 0.001). With the OptiBond All-In-One adhesive, no significant difference between application modes was observed.ConclusionAlternative modes of application did not adversely affect the sealing ability of one-step self-etch adhesives. Depending on the type of adhesive, alternative modes of application may contribute to low microleakage values