Contemporary Clinical Dentistry最新文献

Context: Sodium hypochlorite (NaOCl), a commonly used intracanal irrigant, adversely affects the organic content of dentin, impacting the bond strength of sealer to root dentin.

Aim: The aim of the study was to compare the antioxidant effects of 25% bamboo salt and 3% green tea extract on the push-out bond strength of AH Plus sealer after NaOCl irrigation.

Subjects and methods: Forty-five single-rooted mandibular premolars were selected, decoronated, and standardized to a length of 12 mm. During the canal preparation process, ProTaper Next rotary files were used, with each step accompanied by the irrigation of 5 ml of 5.25% NaOCl. Following the instrumentation, the canals were flushed with an additional 5 ml of 5.25% NaOCl and 17% ethylenediaminetetraacetic acid. The specimens were then categorized into three groups (n = 15 each): Group 1, treated with saline; Group 2, treated with a 25% bamboo salt solution; and Group 3, treated with a 3% green tea extract solution. From the coronal and middle thirds of each root, 1.5 mm thick slices were prepared. These slices were then tested for push-out bond strength using a universal testing machine.

Statistical analysis: The data collected were subjected to one-way analysis of variance, followed by Tukey's post hoc analysis for detailed examination.

Results: The use of 5.25% NaOCl resulted in a significant reduction in the bond strength of AH Plus to dentin (P < 0.05). Among the treated groups, the samples irrigated with 3% green tea extract exhibited a notably higher push-out bond strength compared to those treated with 25% bamboo salt.

Conclusion: Within the limitations of this in vitro study, all experimental groups showed significant changes in push-out bond strength after antioxidant treatment.

Objective: The objective is to evaluate the effectiveness of two different penetration depths of micro-osteoperforations (MOPs) on the rate of orthodontic tooth movement over 60 days. In addition, the amount of pain and discomfort caused by the MOP was evaluated.

Materials and methods: A total of 22 patients (18-30 years) who need fixed orthodontic treatment were recruited and randomly assigned into two groups. Randomization for determination of the experimental side and depth of perforations was done using sealed envelopes. On each patient, the other side of the mouth worked as control side with no MOPs. Patients in group 1 (MOP-5) received 3MOPs on the buccal surface of the alveolar bone each at 5 mm depth, whereas patients in group 2 (MOP-7) received 3MOPs on the buccal surface of the alveolar bone each at 7 mm depth. The amount of canine retraction was measured every 30 days at two intervals on both sides of the mouth. Pain perception was measured after 1 h, 24 h, 72 h, 7 days, and 28 days of procedure. MOP-related pain was measured using a visual analog scale. The level of statistical significance was P ≤ 0.05.

Results: The result of the intra-examiner reliability using intraclass correlation coefficient more than 0.97 (P < 0.001), indicating excellent repeatability and reliability of the measurements. The baseline characteristics between groups were similar (P > 0.05). Both the groups demonstrated a significantly higher canine movement than the control group. No significant difference was seen between the MOP-5 and MOP-7 groups (P > 0.05) in terms of canine retraction. Mild-to-moderate pain was experienced only in the first 24 h of the procedure.

Conclusion: Three MOPs with a depth of 5 mm can be performed as an effective method to increase the rate of tooth movement. However, increasing the depth of perforation beyond 5 mm does not additionally enhance tooth movement.

Critical alveolar ridge defects can result from several causes. Ridge expansion is a technique that aims to increase the width of the bone crest. A male patient presented an edentulous segment which leads to be careful concerning the adjacent teeth. Through this case report, the used technique was explained with all steps and was combined with guided bone regeneration (GBR). The particularity of this case was the membrane exposure during the healing period before placing the crowns, resulting in bone resorption. This resorption was stable after restauration and follow-up. Ridge split is indicated in cases where the width of the ridge is at least 3.5 mm. The procedure demonstrated a safe and predictable alternative for implant placement in a knife-edge ridge, with a high survival rate of ridge expansion. The patient presented good healing at the follow-up with a little resorption that remained stable in time after crown placing.

Intrusive luxation is one of the most severe types of dental trauma that needs immediate intervention. Various treatment modalities are passive, active, and surgical repositioning performed to prevent healing complications such as root resorption, pulp necrosis, ankylosis, and infraocclusion of the traumatized teeth. This case report discusses a patient with traumatically intruded incisors while undergoing orthodontic treatment. Active repositioning, namely orthodontic traction using light and continuous forces were directed onto the intruded teeth commenced 1 month post the injury and brought into occlusion. Clinical and radiographic evidence for the pulpal and periodontal evaluation were done after a year of active treatment. Thus, it can be concluded that observation for a span of 6-12 months before treatment is not necessary to be advocated and immediate intervention is advisable.

Background: The choice of sealing material is a crucial factor that influences the outcome of endodontic treatment.

Aim: The purpose of this study was to compare the sealing ability of mineral trioxide aggregate (MTA) Angelus, Endocem MTA, and NeoPutty MTA when used as furcal perforation repair materials.

Materials and methods: A total of 45 mandibular molars were used. Root canal treatment was carried out following which standardized furcal perforations were made. The specimens were randomly divided into three groups of 15 teeth each. Group A-Furcal perforation repair by means of MTA Angelus, Group B-Furcal perforation repair using Endocem MTA, and Group C-Furcal perforation repair by NeoPutty MTA. Following the repair procedure, the pulp chambers and access openings were filled with temporary restorative material and immersed in 1% basic fuchsin dye for 24 h. The teeth were sectioned longitudinally and the linear dye penetration was measured using a stereo-microscope.

Results: The one-way analysis of variance (ANOVA) revealed a statistically significant difference among the groups (F = 16.15, P < 0.001). On calculating the depth of leakage to the total length of the perforation, it was observed that the mean leakage was 32.83% in Group I, 52.92% in Group II and the lowest, 16.35% in Group III. The ANOVA test reveals a statistically significant difference among the groups (F = 15.92, P < 0.001). Comparing the depth of dye penetration of dye, 33.3% of the Group I samples showed ≥50%, 49%-25%, and <25% dye penetration. Although 56.7% of Group II samples showed ≥50% dye penetration, whereas 63.3% of Group III showed <25% dye penetration.

Conclusion: The present study indicated that NeoPutty MTA had the least dye penetration followed by MTA Angelus and Endocem MTA.

Regenerative endodontic therapy (RET) of young permanent teeth with necrotic pulps and apical periodontitis in young people, deciduous tooth pulp may be utilized as a natural, biologic scaffold. Recent developments in stem cell biology and material sciences are beneficial for new treatment methods. Previously traumatized and necrotic young permanent tooth was treated with RET protocol. In the first visit, irrigation, and placement of triple antibiotic paste dressing were done. After that in the second visit, intracanal medication was removed and whole pulp tissue harvested from the deciduous tooth was transplanted in the young permanent tooth. Following placement of Biodentine^® coronal barrier, access cavity was restored with acid-etch resin composite. This case report would highlight favorable outcome of RET using deciduous pulp autotransplantation in young permanent tooth using cone-beam computed tomography for 6 months' follow-up.

Introduction: Ninety-five percent ethanol is the routinely used and standard cytological fixative. However, commercially available ethanol is expensive and not freely available in some institutions. There is always a search for an ideal alternative.

Aim and objective: In the present study, we evaluated 100% coconut water (CW) and 30% aqueous honey solution as cytological fixative at different time points and compared them with routinely used spray fixative of ethanol.

Materials and methods: Oral smears were prepared from 30 healthy volunteers, and a total of 270 smears were prepared. From each volunteer, 9 smears were prepared. One smear was fixed in ethanol, four smears were fixed in 100% CW and four in 30% aqueous honey solution. Of the four smears fixed in CW or honey, one smear was fixed for 15 min, one for 30 min, one for 45 min, and one for 1 h, respectively. The slides were dried and then the smears were stained with Papanicolaou staining. Slides were evaluated by two independent observers who were blinded to the procedures. The following parameters were evaluated - nuclear staining, cytoplasmic staining, cell morphology, clarity of staining, and uniformity of staining. Statistical analysis was done using post hoc pairwise comparison, and P < 0.05 was considered to be statistically significant.

Results: The results of the study showed that fixation with 30% aqueous solution of honey or 100% CW for more than 15 min yields useful and evaluable results.

Conclusion: These readily available materials can be used as alternatives of alcohol in oral cytology.

Background: Preventive dental procedures are cornerstones of caries management.

Introduction: This research aims to analyze the clinical effectiveness of pit and fissure sealants when applied to etched enamel pretreated with solvents compared to the conventional etch and seal technique.

Subjects and methods: Children and adolescents with clinically healthy occlusal surfaces or noncavitated occlusal carious lesions on permanent first and/or second molars in all four quadrants were randomly allocated into four groups. A total population of 87 participants (348 teeth) were selected for the research based on the inclusion criteria. Following the enrollment, teeth were etched and sequentially assigned for application of Group 1 = Conventional Etch Seal (control group), Group 2 = isopropyl alcohol (IPA), Group 3 = acetone, and Group 4 = ethanol before sealant application. All participants were evaluated for marginal integrity, discoloration, and clinical retention of pit and fissure sealant after 6-month intervals and 12-month intervals using Feigal's criteria.

Results: At 6-month and 12-month intervals, the collected data were compiled and statistically analyzed using the Chi-square test of significance for marginal integrity between groups all four groups. The Wilcoxon rank test was assigned to assess the difference between parameters measured at 6 months and 12 months. A highly significant difference was found between the groups (P < 0.05) for marginal integrity and anatomic form at 6 months and 12 months when intergroup comparison was done using the Kruskal-Wallis test.

Conclusion: Surfactants such as IPA and acetone can be adopted while choosing methods for the long-term clinical success of resin-based sealants for increasing wettability and penetration depth.

Background: Oral cancer is one of the ten most common cancers worldwide and the sixth most common type of all cancer in India. Among the oral malignancies, oral squamous cell carcinoma (OSCC) is the most common, accounting for more than 90% of oral cancer and hence a significant public health concern.

Aim: The aim of this study was to evaluate clinicopathological and demographic profiling of OSCC in a district and adjacent area of lower Assam.

Settings and design: This was a retrospective observational study.

Materials and methods: A total of 140 histologically confirmed OSCC patients diagnosed at the Regional Cancer Centre in the district between the period 2022 April and 2023 October constitute our study sample size in this study. The duration of the study was 1½ years.

Statistical analysis: The clinical and histopathological features were analyzed using descriptive statistics. Statistical Package for the Social Science (SPSS) version 23.0 was used.

Results: OSCC constitutes 23.97% of head-and-neck cancer. The incidence of OSCC was higher in males. The highest number of patients was in the age group of 50-59. The most common site of OSCC was the buccal mucosa followed by the tongue. Most of the cases were well differentiated, the number being 82 (58.57%). Most of the patients were in Stage III and Stage IV.

Conclusions: The present study highlights that in the lower Assam region, the majority of the OSCC patients are middle-aged male patients with advanced stages of OSCC. The findings from the present study can be used to compare the scenario of OSCC in other parts of Assam and North East India and also can be used for a follow-up study.