International Journal of Dentistry最新文献

Objective: This study aimed to evaluate the color stability of various restorative materials after immersion in one commercial mouthwash.

Materials and methods: Twenty-four samples from two composite resin systems (Denfil and Voco) and their flowable counterparts (Denfil Flow and Voco Grandio Flow) were exposed to Misswake Total Care mouthwash. Color measurements (L ^∗ , a ^∗ , b ^∗ ) were taken before and after immersion using a spectrophotometer, and color differences were calculated according to CIE76 (ΔE76) and CIEDE2000 (ΔE ₀₀) formula. Data were analyzed using two-way ANOVA (α = 0.05).

Results: All composite groups exhibited color changes after immersion in the mouthwash. Denfil Flow showed the highest mean ΔE ₀₀ (1.11 ± 0.29), followed by Denfil (1.09 ± 0.33), Voco Grandio Flow (0.97 ± 0.20), and Voco Grandio (0.66 ± 0.17). A significant difference was observed between Denfil and Voco groups (p  < 0.05), whereas flowable and packable types within the same brand did not differ significantly. All ΔE values remained below the clinically perceptible threshold (ΔE < 3.3).

Conclusion: Nanohybrid composites demonstrated greater resistance to discoloration than microhybrid composites. Although Misswake Total Care mouthwash induced measurable color changes, these changes remained within clinically acceptable limits. The immersion period used in this study corresponds to approximately 2 years of daily use, suggesting that the product is unlikely to cause clinically relevant discoloration over this timeframe.

Limited visibility of the operating field can lead to difficulties in relation to adequate retrograde filling during periapical surgery in specific clinical situations. Solid and homogenic root filling material that does not need to be removed after apicoectomy could be used as an alternative to retrograde filling. This study aims to compare the micro-hardness of mineral trioxide aggregate (MTA) considering retrograde vs. orthograde obturation during root end resection in vitro. Methods: 20 roots of maxillary incisors were chemo-mechanically prepared and divided into 2 groups: group A (n = 10)-retrograde filling and group B (n = 10)-orthograde filling. The specimens of group A were filled with gutta-percha and resin-based sealer, 3 mm of the apical area were removed after the incubation period. Retrograde cavities of a depth of 3 mm were made and filled with MTA. In group B, apical 7 mm of the roots was filled with MTA in an orthograde manner. After the incubation, 3 mm of the root ends were removed. Vickers microhardness test was applied to the MTA No statistically significant difference in micro-hardness between groups was found (p > 0.05). The assessment of retrograde filling did not reveal significant differences of MTA micro-hardness in different parts of the material (p > 0.05). The assessment of orthograde filling revealed that MTA micro-hardness 3 mm from the apex was significantly higher when compared to the distance of 1 and 2 mm from the root apex (p > 0.05). The obturation method did not affect the hardness of MTA during root end resection in vitro.

Objectives: Early oral hygiene and care help prevent early childhood caries (ECC). As remote Indigenous communities in Canada have limited access to dental care, this project explores Indigenous women's oral hygiene practices during and after pregnancy and in regard to children (0-36 months) within three communities in Northwest Territories (NWT), Canada.

Methods: A mixed-methods study design was employed. Self-identifying Indigenous women who were pregnant or had given birth within the 3 years preceding data collection (2019) were invited to complete a semi-structured, interviewer-administered questionnaire.

Results: 156 Indigenous women participated. Of participants who gave birth in the last 3 years (n = 145), 78.8% started brushing infants' teeth/gums. Of participants whose infants had teeth (n = 114), 27.9% had taken the infant to a dentist. Factors impacting infant oral hygiene practices included personal experiences, access to supplies, and health literacy. Among pregnant participants (n = 28), 38.5% had visited a dentist during pregnancy. Among participants who had given birth within 3 years (n = 145), 67.9% had since seen a dentist. Factors impacting dental care utilization during pregnancy included service availability and safety concerns. After giving birth, factors included service availability and competing priorities.

Conclusions: Within Indigenous communities in NWT, inaccessible oral health care, information, and supplies made it challenging for mothers to meet oral health recommendations during and after pregnancy and in regard to young children. The findings of this project suggest the need for long-term, collaborative strategies focused on increasing the availability and accessibility of dental care professionals and services within communities and improving oral health literacy via culturally appropriate and collaboratively developed informational initiatives.

Introduction: This pilot study investigated the effects of ≥6 weeks after nonsurgical treatment of the tissues surrounding dental implants, using clinical traditional methods and the aMMP-8 test technology in 39 patients.

Methods and materials: In the peri-implant pocket of 39 dental implants, an aMMP-8 concentration, gingival bleeding (BOP), and implant pocket depth (PPD), and an x-ray for radiologic bone level (RBL) were taken. The ≥6 weeks after nonsurgical treatment of the implants was carried out, and the treatment response was evaluated again after 30 days using the same methods.

Results: The ≥6 weeks after nonsurgical treatment achieved a decrease in the aMMP-8 enzyme level, BOP, and the implant pockets. After 1 month, no statistically significant positive changes were observed in the result of the BOP (p=0.02) or the depth of deepened implant pockets (p=0.02) without the effect of surgical treatment, but there was a statistically significant reduction in the levels of the aMMP-8 chair-side test (p=0.001).

Conclusions: Signs of inflammation were found to be very common in the tissues surrounding the implant. Getting the peri-implant tissue healthy in ≥6 weeks after nonsurgical treatment with traditional nonsurgical treatment would seem to be surprisingly challenging. The applicability of the aMMP-8 enzyme test in diagnosing and reading the real-time health status of the surrounding tissues in monitoring ≥6 weeks after nonsurgical treatments provides a useful and accurate method to control the health and disease. Trial Registration: ClinicalTrials.gov Identifier: NCT06408467.

Purpose: This study aimed to comparatively evaluate piezoelectric surgery and conventional surgery for dental implant site preparation, focusing on bone density, implant stability, and peri-implant marginal bone loss, to contribute valuable insights into optimizing dental implant procedures for improved patient care and treatment outcomes.

Material and methods: In this randomized controlled clinical trial with a split-mouth design, 30 patients with a mean age of 35.7 (standard deviation [SD] 7.1) with two edentulous sites, at least one of which was in the posterior mandibular region, were treated sequentially at two sites: Site A, where implant placement was conducted using piezoelectric surgery, and Site B, where conventional surgery was employed. Postsurgical evaluations were conducted at 6 and 9 months.

Results: Significant differences were observed between the two techniques. Bone density was greater by 0.035 g/cm² (p=0.001) in favor of piezoelectric surgery at 9 months, but not at 6 months. Although there were significant changes in stability within the groups, the difference in the change in implant stability at 6 months between piezoelectric surgery and the control site was not significant at 6 months, Site A (piezoelectric surgery) demonstrated significantly higher implant stability quotient (ISQ) values (mean = 76.7) than Site B (mean = 72.8; p ≤ 0.001). Patient discomfort was significantly greater in the control group than in the piezoelectric surgery group by 1.3 visual analog scale (VAS) (p-value < 0.001).

Conclusion: Piezoelectric surgery demonstrated potential benefits over conventional surgery in terms of implant stability, postoperative discomfort, and bone density. These findings highlight the potential of piezoelectric surgery to enhance clinical outcomes and patient satisfaction in dental implant procedures. Further investigation into long-term implant survival rates and esthetic outcomes is warranted. Trial Registration: ClinicalTrials.gov identifier: ISRCTN99951388; 16CNAHMMDS000002/ISRCTN99951388.

Background: Alveolar bone resorption following tooth extraction, especially in the buccal plate, can compromise ridge dimensions, esthetic outcomes, and implant stability. The socket shield technique (SST) aims to preserve buccal bone by retaining a thin buccal root fragment, maintaining the periodontal ligament (PDL) and associated bone.

Objective: To evaluate long-term dimensional stability of the alveolar ridge following immediate implant placement using SST, focusing on horizontal buccal and palatal bone changes over a 3-year period.

Methods: This retrospective study included 20 patients requiring single-tooth implant-supported restorations in the esthetic zone, treated between 2019 and 2021 at the University of Messina. All implants were placed using SST with the "Preserving Nature" protocol, retaining a buccal root fragment of approximately 1 mm. Immediate provisionalization was performed following standardized surgical and prosthetic protocols. Cone-beam computed tomography (CBCT) scans at baseline (T0) and 3 years (T1) were aligned using a three-point superimposition method to standardize measurements. Paired statistical analysis assessed changes in bone dimensions, with significance set at p  < 0.05.

Results: No measurable horizontal buccal bone loss was detected in any patient. Minimal horizontal palatal bone loss occurred in 15% of cases, while vertical palatal bone height remained stable. Mean dimensional changes were not statistically significant (p=0.109).

Conclusion: SST provided excellent preservation of alveolar bone dimensions, particularly in the buccal plate, over 3 years. The technique offers predictable benefits for implant placement in the esthetic zone. Despite limitations related to retrospective design and small sample size, the standardized surgical protocol and precise CBCT analysis support reproducibility. Randomized controlled trials are warranted to confirm these results.

Objectives: To determine the prevalences, demographic, and pathologic profiles of patients diagnosed with nonodontogenic cysts (NOCs) in the oral and maxillofacial regions.

Materials and methods: Biopsy records from the participating institutions from 2000 to 2024 were studied for lesions diagnosed in the NOC category. Demographic profiles, the locations, and pathologic diagnoses were collected. Data were analyzed by using IBM SPSS Statistics version 29.0.

Results: A total of 183,132 cases were obtained and 1864 cases (1.02%) were diagnosed as NOCs. The age of the patient ranged from 1 to 96 years with mean ± SD = 49.03 ± 18.43 years. The overall male-to-female ratio was 1.08:1. The majority of the lesions were encountered in the soft tissue. The most prevalent NOC was nasopalatine duct cyst followed by mucus retention cysts and nasolabial cysts.

Conclusions: This study is the largest study on NOCs from Southeast Asia, the Middle East, and North America. The frequency of NOCs found in this studied population is somewhat different from those reported in previous studies. This study offers a valuable database for clinicians to facilitate the clinical differential diagnoses along with for the pathologists in rendering the final diagnosis.

Objective: Maxillary incisors intrusion is needed in cases with overeruption of these teeth in deep bite and gummy smile. True intrusion requires precise mechanical planning and clinical supervision. This study compares the mini-screw (MS) and Burstone intrusion arch (BIA) methods clinically and radiographically to assess their effectiveness.

Materials and methods: Seventeen patients with deep bite were randomly assigned to two groups: the MS group (eight patients, aged 19.75 ± 2.48) treated with MS, and the BIA group (nine patients, aged 20.67 ± 5.41) treated with the BIA method. Ultra-low-dose CBCT (ULD CBCT) scans were taken at the start (T0), immediately after (T1), and 3 months after (T2) treatment. Intrusion amount, rate, inclination changes, overbite, gingival display, root resorption, and periodontal criteria were assessed at three-time intervals: T0-T1, T1-T2, and T0-T2. Data were analyzed using the independent T-test, with significance at p  < 0.05.

Results: The MS group showed significantly greater intrusion than the BIA group at all three-time intervals (p  < 0.001). The active intrusion rate was also significantly higher in the MS method (p  < 0.001). No significant difference was found between the groups in the decrease of overbite. The BIA group showed some relapse during retention, whereas the MS group did not (p  < 0.001). The MS group also had a significantly greater decrease in gingival display than the BIA group (p  < 0.05).

Conclusions: Both MS and BIA methods were effective for maxillary incisor intrusion. The MS method resulted in more true intrusion and less gingival display. After 3 months of retention, the MS group showed no vertical relapse, while the BIA group had a significant relapse of 0.1 mm (p  < 0.001).

Background: The aim of this study was to assess the impact of molar incisor hypomineralization (MIH) on oral health-related quality of life (OHRQoL) in 11-14 years old children and parents/caregivers' perception.

Materials and methods: Articles published up to December 2023 were searched in Scopus, Web of Science, and PubMed databases. From 127 articles found initially, 20 studies were considered. Finally, 11 articles were eligible to be included, of which nine articles entered to meta-analysis. Six studies using the Child Perceptions Questionnaire (CPQ) 11-14 and three studies using the Parental-Caregiver's Perceptions Questionnaire (P-CPQ) contributed to meta-analyses.

Results: In MIH affected children, the total score of CPQ 11-14 with the pooled mean of 13.56 (95% confidence interval [CI]: 7.64-19.48; p-value <0.001) and oral symptoms and functional limitation domains with the pooled means of 5.29 (CI: 2.83-7.74; p-value <0.001) and 3.04 (95% CI: 0.63-5.46; p-value = 0.001), respectively, increased significantly. However, the increase of emotional and social well-being domains with the pooled mean of 2.99 (CI: 0.02-5.97; p-value = 0.05) and 2.26 (CI:-0.35 to 4.86; p-value = 0.09), respectively, was not significant. The results revealed that in children with MIH, no significant relation was observed in the total score of P-CPQ with the pooled mean of 9.86 (CI: -0.76 to 20.48; p-value = 0.07) and all domains.

Conclusions: MIH decreased OHRQoL in teenagers and significantly affected all domains except for emotional and social well-being. Parents/caregivers believed MIH did not affect OHRQoL.

Aim: Many patients visit dental clinics complaining of oral malodor. However, there is no simple, inexpensive tool for assessing oral malodor. Therefore, this study developed a simple method using a detector tube.

Materials and methods: A detector tube was created to detect hydrogen sulfide based on the color change of an indicator (GASTEC, Kanagawa, Japan). We confirmed the ability to detect hydrogen sulfide concentrations of 200 ppb, which corresponds to the human olfactory threshold, using standard gas. The hydrogen sulfide detector tube was used to evaluate oral malodor in 42 outpatients aged 16-80 years, and the results were compared with an organoleptic test (OLT) and volatile sulfur compound (VSC) concentrations measured using a portable sulfide monitor.

Results: Comparing the hydrogen sulfide detector tube with the OLT score, the sensitivity was 0.90 and the specificity was 0.74 for OLT score ≧2.75 (n = 37). For VSC concentrations measured by the sulfide monitor, the sensitivity was 0.85 and the specificity was 1 at ≧300 ppb (n = 41). For OLT score ≧2.75 or VSC ≧300 ppb, which are considered indicators of "clearly noticeable oral malodor," the detector tube showed a sensitivity of 0.84 and a specificity of 1. The diagnostic performance of the detector tube decreased when evaluating mouth air rather than standard gas, possibly due to the inhibitory effects of humidity and other gases in mouth air. Although it did not correspond to the olfactory threshold, the detector was highly sensitive and specific for determining the level of "clearly noticeable oral malodor"; it was considered a practical, easy-to-use tool.

Conclusion: The new hydrogen sulfide detector tube, when used in combination with OLT, should be useful for determining "clearly noticeable oral malodor".