Quintessence international最新文献

Objectives: This study aimed to evaluate the influence of different whitening toothpastes on color change and alteration in enamel surface roughness and microhardness compared to a conventional toothpaste.

Method and materials: Fifty bovine incisors were selected, cleaned, and stored before being divided into five groups: a conventional toothpaste group and three whitening toothpaste groups containing different abrasive agents: silica, hydrogen peroxide, and activated charcoal. Specimens underwent simulated brushing, staining with black tea solution, and subsequent analyses of color, surface roughness, and microhardness. Statistical analysis was performed using three-way ANOVA and Tukey post-hoc tests (P .05).

Results: The results showed that the color analysis revealed similar whitening potential among all toothpastes. They showed significant differences in surface roughness (P .001) and microhardness (P .001) after simulated brushing. While all toothpastes caused a decrease in microhardness, the charcoal-based toothpaste showed a significant increase in surface roughness compared to the initial condition.

Conclusion: All toothpastes demonstrated whitening capability. Surface roughness changed after brushing with activated charcoal-based whitening toothpaste, but final roughness was similar across all groups. Whitening toothpastes led to a decrease in enamel microhardness, with similar final performance across all toothpastes analyzed.

Objective: An altered sensation during endodontic treatment can occur due to the extrusion of endodontic materials. This study aims to discuss intentional replantation to address paresthesia resulting from an endodontic file penetrating the inferior alveolar nerve canal and provide a protocol for managing nerve injuries in such incidents.

Case presentation: A 12-year-old girl developed paresthesia when an endodontic file separated and was inadvertently pushed through the apical foramen into the inferior alveolar nerve canal during root canal treatment of the mandibular left first molar. A CBCT scan revealed the file penetrating the canal towards the inferior border of the mandible. After considering the treatment options, intentional replantation was deemed suitable. The tooth was atraumatically extracted and preserved in sterile saline. The surgeon then carefully cleaned and irrigated the socket. The radiographic assessment confirmed successful file removal from the socket. The root ends were resected, and retrograde preparation and obturation were conducted using ultrasonic tips and mineral trioxide aggregate. The tooth was then replanted into the socket. Successful replantation was confirmed by tooth stability and an audible click. The patient was prescribed antibiotics and steroids. After completion of the endodontic treatment, a stainless steel crown was cemented. The successful intentional replantation procedure resulted in rapid improvement in the patient's condition. The normal sensation had been restored, indicating nerve recovery. At the 15-month follow-up, periapical bone healing and the eruption of the adjacent second molar were observed, affirming the treatment protocol's overall success.

Conclusion: Prompt intervention and immediate intentional replantation facilitated direct inspection of the separated file within the socket. Collaboration between an oral maxillofacial surgeon and an endodontist ensures expedited and targeted treatment, leading to favorable outcomes.

Objective: This review aimed to examine differences in outcomes with the use of intra-articular hyaluronic acid vs corticosteroids after temporomandibular joint arthrocentesis.

Method and materials: Studies were searched on PubMed, Embase, Web of Science, and Google Scholar up to 15th January 2024. Randomized controlled trials comparing hyaluronic acid with corticosteroids after TMJ arthrocentesis were included. The outcomes were pain and maximal mouth opening.

Results: Ten articles corresponding to nine randomized clinical trials were included. There was no statistically significant difference in pain scores at 1 week (mean difference [MD] -0.30, 95% CI -1.25 to 0.65, I2 = 0%), 1 month (MD -0.55, 95% CI -1.23 to 0.13, I2 = 0%), and 6 months (MD -0.57, 95% CI -2.10 to 0.96, I2 = 58%) between the two groups. However, pain scores were found to be significantly lower in the hyaluronic acid group at 3 months (MD -1.07, 95% CI -1.84 to -0.31, I2 = 0%). No statistically significant difference was noted in maximal mouth opening at 1 week (MD 0.78, 95% CI -1.79 to 3.35, I2 = 0%), 1 month (MD 0.32, 95% CI -1.83 to 2.46, I2 = 0%), and 3 months (MD -0.41, 95% CI -3.90 to 3.07, I2 = 0%) between the two groups. Descriptive analysis for studies not included in the meta-analysis also presented similar results.

Conclusions: Low-quality evidence suggests that both intra-articular hyaluronic acid and corticosteroids have similar efficacy in improving pain scores and maximal mouth opening after temporomandibular joint arthrocentesis.

Objective: Oral cancer examinations seek to clinically identify early oral cancers and discover premalignancies prior to their progression to invasive cancer.

Method and materials: A cross-sectional study was conducted between April and August 2017 to explore and quantify the diagnostic approach used by United States (US) general dental practitioners following discovery of an oral lesion suspicious for malignancy/premalignancy. US licensed general dental practitioners who were clinically active members of the US National Dental Practice-Based Research Network were eligible to participate. Data for analysis were obtained via two questionnaires.

Results: The majority of participants were males, practiced full-time, had a suburban primary practice, were born during the 1950s, and graduated dental school in the 1980s or 2000s. After identifying an oral lesion suspicious for premalignancy/malignancy, the next action of most general dental practitioner respondents (65.4%) was to refer the patient for consultation/biopsy. Most general dental practitioners (87.2%) referred to an oral and maxillofacial surgeon; 22% of general dental practitioners reported personally biopsying suspicious lesions. There was a relatively weak association between completing an Advanced Education in General Dentistry or General Practice Residency and subsequently personally performing biopsies on patients with oral lesions suspicious for malignancy/premalignancy (OR 1.33, P = .06). Most written referrals took place electronically and often included information, including lesion location (87.0%), lesion sign/symptoms (85.3%), lesion history (83.9%), radiographs (59.3%), medical history (50.6%), dental history (48.8%), and photographs (42.4%). When a referral biopsy was performed, referring clinicians were most frequently informed of the findings via a written report (96.7%, when positive for malignancy/premalignancy, and 95.4% when negative).

Conclusion: A snapshot is presented of current actions taken by US general dental practitioners following the discovery of oral abnormalities suspicious for premalignancy/malignancy.

Objective: To evaluate the survival of fully guided implants placed with a hollow tooth-supported computerized surgical guide (TSSG).

Method and materials: This retrospective study included 94 patients who underwent implant placement using freehand or TSSG by the same operator between 2015 and 2020. Early implant failures occurring within 1-year post-rehabilitation were assessed.

Results: In the study, two types of implants were placed using two different techniques: TSSG and freehand. The TSSG group consisted of 84 S implants and 100 LP implants, and the freehand group included 90 S implants and 94 LP implants. The results showed that more implants survived when placed freehand compared to TSSG (181 [98.4%] vs 172 [93.5%], respectively, P .05). The only significant factor affecting the success rate was the type of implant, with LP implants having a higher survival rate in the TSSG group (P .05).

Conclusion: Surgeons should consider the impact of implant type on survival rates when utilizing the TSSG system.

Objectives: The purpose of the present study was the radiographic evaluation of endodontically treated teeth presenting periapical radiolucency and unintentional overfilling with gutta-percha or sealer on treatment outcome and persistence of the extruded materials.

Method and materials: After assessment using periapical index (PAI), 202 roots filled with gutta-percha and zinc oxide-eugenol sealer (Roth 811, Roth International), exhibiting unintentional overfilling and periapical radiolucency were selected. All cases had at least 1 year of follow-up. Type of extruded material, periapical status, and removal/persistence of the extruded material were evaluated by two independent observers. Data were statistically analyzed using logistic and linear regression analysis.

Results: Tooth location (P .001), follow-up period (P .001), and type of extruded material (P = .004) significantly influenced treatment outcomes. Specifically, posterior roots exhibited better outcomes compared to anterior, and cases with overfilling of sealer showed superior healing potential compared to those with gutta-percha overfilling. Additionally, longer recall periods were associated with improved treatment success. The type of extruded material (P .001) and follow-up period (P .001) significantly affected the presence of extruded material in the follow-up radiograph. The persistence of extruded material was greater when gutta-percha was extruded, and extruded materials were less detected when the follow-up period was longer.

Conclusion: Teeth with periapical radiolucency and unintentional overfilling require longer follow-up intervals for effective monitoring of healing. Treatment outcome was associated with the type of extruded materials used in the present study. The persistence of those materials in the periapex did not affect healing.

Objectives: To evaluate the survival rate of minimally invasive semipermanent occlusal polymethyl methacrylate (PMMA) onlays/veneers in previous temporomandibular disorder (TMD) patients with severe tooth wear and with a loss of vertical dimension after up to 7 years.

Method and materials: This case series was designed as a follow-up evaluation with consecutive patient recruitment. All patients bearing the indication for this kind of rehabilitation were treated by the same clinician using the same adhesive methodology. The study included 22 patients (3 men/19 women), with a mean ± SD age of 50.7 ± 11.6 years. Controls followed within the first 4 weeks (and subsequently as required). Failure criteria included damage by fracture, chipping, and retention loss. Survival rates were determined based on the Kaplan-Meier analysis.

Results: 328 semipermanent occlusal/incisal veneers were included (142 maxillary/186 mandibular teeth). Almost 80% of the restorations were in place and in function when starting the follow-up treatment after 180 days; failures predominantly occurred within the first 3 to 6 months but proved reparable. Depending on the patients' priorities, scheduled replacements followed successively, and more than 65% did not show repair or any renewal needs for more than 360 days.

Conclusion: Within the limitations of this study the survival rates of occlusal veneers made of PMMA were sufficiently high to allow for consecutive treatment of the respective teeth by means of permanent restorations while preserving the restored vertical dimension. In patients with severe tooth wear and a TMD history, semipermanent restorative therapy with occlusal PMMA onlays/veneers would seem a noteworthy option.

Objective: Varying levels of sex hormones across the menstrual cycle in young systemically healthy females may alter tissue responses to plaque, resulting in increased gingival inflammation. Also, higher severity and prevalence of gingivitis has been demonstrated in adult women than men, attributed to hormonal changes. Further, it has been reported that gingivitis raises the levels of systemic inflammatory markers such as C-reactive protein. This interventional trial aimed to evaluate the effect of supragingival scaling on serum high-sensitivity C-reactive protein (hsCRP) levels along with periodontal parameters in systemically healthy women of reproductive age with natural gingivitis.

Method and materials: In total, 57 women of reproductive age were enrolled into two groups. The test group (n = 30) comprised systemically healthy women with gingivitis who received supragingival scaling. The control group (n = 27) included systemically and periodontally healthy women. Periodontal parameters (Gingival Index, Plaque Index, pocket probing depth, bleeding on probing) and serum hsCRP levels were recorded at baseline for both the groups. Follow-up of test group participants was done at 3 and 6 months.

Results: Serum hsCRP and periodontal parameters were significantly higher in the test group than in the control group at baseline, and this decreased significantly after treatment in the test group at the 6-month follow-up (P ≤ .05). Gingival Index, bleeding on probing, and hsCRP in the test group at 6 months were reduced to the baseline levels of systemically and periodontally healthy women.

Conclusion: Treatment of gingival inflammation can help in lowering the systemic and local inflammation to the levels of systemically and periodontally healthy women.