Indian Journal of Dental Research最新文献

Abstract: To determine the outcome of full pulpotomy in management of mature permanent teeth with irreversible pulpitis when 2.5% versus other concentrations of sodium hypochlorite (NaOCl) were used to achieve haemostasis. Electronic searches were performed in PubMed, Embase, Web of Science, International Clinical Trials Registry Platform, and ClinicalTrials.gov for English language articles until July 2021. Randomised clinical trials and cohort, cross-sectional, and case-control studies where full pulpotomy was performed to manage mature permanent molar teeth with irreversible pulpitis and no periapical radiolucency were included. Newcastle Ottawa Scale and the Cochrane risk of bias tool were used for quality assessment. The success rate for full pulpotomy was documented. The protocol was registered in PROSPERO database (CRD42020177214). Out of 861 studies, four were considered for data analysis. Three studies were single-arm prospective trials on pulpotomy, while one was a randomised control trial comparing pulpotomy and root canal treatment. A combined success rate of 93% from 117 teeth was reported from three studies using 2.5% NaOCl as a haemostatic agent. One study used 5% NaOCl and reported a success rate of 100% (n = 6 teeth). The certainty of evidence substantiated by the GRADE approach was of low quality. Overall quality assessment revealed a considerable risk of bias in three studies. Irrespective of the NaOCl concentration, the success rate of pulpotomy in mature permanent teeth with irreversible pulpitis was high. No study compared the different concentrations of NaOCl as a haemostatic agent. Further, randomised controlled trials are required to investigate the effect of NaOCl concentration for haemostasis on the outcome of pulpotomy.

Introduction: The physical and chemical properties of calcium silicate cement might be affected due to exposure to acidic or alkaline conditions during clinical use. The present study aimed to evaluate the effect of acidic and alkaline environments on the surface morphology of biodentine (BD) and white mineral trioxide aggregate (wMTA).

Materials and method: Disc-shaped specimens of BD (n = 30) and wMTA (n = 30) were prepared in a metal mould and wrapped in pieces of gauze. They were divided into three sub-groups according to the storage media: group A, soaked in sterile distilled water at a pH of 7.0; group B, exposed to butyric acid buffered at pH 4.0; and group C, exposed to calcium hydroxide solution buffered at pH 12.0. The specimens were incubated for 7 days at 37°C, followed by examination under scanning electron microscopy at 1000x and 5000x magnification to characterise the microstructural morphology.

Results: Definite changes were seen in the microstructure of BD and wMTA on exposure to acidic and alkaline pH. The microstructure of wMTA tends to exhibit reduced cohesion when exposed to an acidic environment, especially when compared to an alkaline pH. Acidic pH exerts a milder influence on the morphological structure of BD when contrasted with its effects on wMTA.

Conclusion: Biodentine may emerge as a more prudent choice than wMTA for utilisation in inflamed periapical regions.

Introduction: Properly adapted complete denture bases will have adequate retention to the underlying oral mucosa. With technological advancement, there are various techniques of fabrication of complete dentures. There are studies regarding the marginal adaptation of conventional and CAD-CAM denture bases, but there is not enough research comparing the marginal adaptation and polymerisation shrinkage of conventional and 3D printed complete denture bases.

Study setting and design: In vitro study using stereomicroscopy to determine the marginal discrepancy between the denture base and the cast.

Materials and methods: Twelve gypsum casts were taken and divided into conventional and 3D-printed groups. Conventional denture bases were fabricated by adapting wax of 2 mm thickness which was subsequently processed whereas 3D printed bases were designed and the standard tessellation language (STL) files were used to print the denture bases. Three points were marked at the mid-palatal line and on both maxillary tuberosities. Digital images were then captured at the marked regions and were used to measure the maximum gap between the cast and denture base at the marked regions. Data were analysed using an independent t-test and one-way ANOVA.

Results: Conventional dentures had a significantly lesser marginal discrepancy than 3D printed dentures (P = 0.000). The left maxillary tuberosity showed the highest marginal discrepancy, significantly different from mid-palatal and right tuberosity sites.

Conclusion: Conventional dentures perform better than their counterparts in terms of adaptation. This accurate adaptation is vital for the retention of the complete denture.

Introduction: With increasing prevalence of dental erosion, this study explores the protective role of traditional fluoride-based products and newer formulations on eroded enamel.

Aims: To assess the protective effectiveness of casein phosphopeptide-amorphous calcium phosphate fluoride (CPP-ACPF) and sodium fluoride (NaF) on human enamel against erosion using surface microhardness (SMH) and Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analyses.

Materials and methods: Ten extracted human third molars were sectioned to obtain 40 enamel sections and randomly assigned into four groups (n = 10) and treated as follows: G1 (Sound Enamel), G2 (Erosive Challenge), G3 (CPP-ACPF + Erosive Challenge), and G4 (NaF + Erosive Challenge). All samples were subjected to Vicker's SMH analysis, while changes in surface morphology and elemental composition were validated in few representative samples using FTIR and SEM, respectively.

Statistical analysis: Paired samples test, Kruskal-Wallis test, and Tukey HSD test were performed using SPSS software version 23 setting P value < 0.05 as statistically significant.

Results: The mean SMH1 values for the experimental groups G3 and G4 were significantly higher (426.58VHN and 455.83VHN) when compared to G1 (P = 0.000) and G2 (P = 0.000). In SEM analysis, G2 showed eroded honeycomb appearance compared to the smooth homogenous surface of G1, while both G3 and G4 showed deposition of some precipitates. FTIR analysis revealed that in G3 and G4, a characteristic peak of phosphate vibrations between 528 and 823 cm-1 and carbonate bands at 845-932 cm-1 was observed.

Conclusions: Both CPP-ACPF and NaF demonstrated a protective effect on enamel against erosive challenge by an orange juice-based beverage.

Abstract: The most prevalent mucogingival issues include insufficient gingival width, decreased vestibular depth, abnormal frenal attachment, gingival recession, pockets that reach the mucogingival junction, excess gingival, inconsistent gingival margin, excessive gingival display and abnormal gingival colour. Numerous periodontal plastic operations have been used to treat these issues. However, each approach has its own drawbacks and is technique-dependent. Adequate depth of vestibule is necessary to maintain good oral health as shallow vestibule leads to accumulation of food and thus impedes oral hygiene maintenance. This case series describes a vestibular deepening procedure performed using modification of periosteal fenestration technique. This technique includes a series of eight cases of shallow vestibule where vestibular deepening was conducted by giving a full-thickness incision to expose the periosteum and create a window of fenestration followed by suturing the labial mucosa to the periosteum at the apical level. The results reported an excellent post-operative outcome showing increased depth of the vestibule.

Abstract: Trichofolliculoma is a rare benign, hamartomatous adnexal tumour of the skin. Aetiology seems to be unclear. It is usually seen in adults, with no gender predilection. The most commonly involved sites are the face and scalp. It appears as a papule or nodule with small protruding hairs, which is a classic feature of the tumour. It has unique diagnostic and histopathological features that help in making a definitive diagnosis. Here, we report an exemplary case of an adult male patient aged 45 years with a gradual progressive diffuse swelling on the left side of the face for 1.5 years. Clinically, it was diagnosed as a sebaceous cyst, but after the biopsy histopathological evaluation was performed, and the diagnosis was confirmed as trichofolliculoma.

Background: Premature degradation is the problem of maxillofacial silicones, significantly affected by ultraviolet exposure, contributing to silicones photodegradation. Degradation necessitates frequent replacement of prostheses that increase the total cost of rehabilitation.

Aims: This study evaluated the effect of bisoctrizole on the ultraviolet absorption properties of silicone material and the stability of this absorption over time. Also, the bisoctrizole effect on the surface roughness of silicone was evaluated.

Methods: There were 60 prepared specimens of room temperature-vulcanising maxillofacial silicone equally divided into two groups according to the conducted tests: ultraviolet absorption test and the surface roughness test. Each group was further subdivided into groups of 10 specimens based on the weight concentration of the ultraviolet (UV) absorber added: 0%, 1% and 2%. The UV absorbance of coloured specimens was measured before and after artificial weathering for 100 and 200 hours. Repeated-measures analysis of variance (ANOVA) was applied for UV absorption results, and one-way ANOVA was applied for the roughness test results to test the changing significances.

Result: Bisoctrizole incorporation led to a highly significant improvement in ultraviolet absorption in all groups, maintaining a high level even after subjecting the specimens to artificial weathering. Furthermore, the addition resulted in a significant increase in surface roughness as the concentration of bisoctrizole increased.

Conclusion: Despite the surface roughness changes, bisoctrizole demonstrated efficacy as a UV absorber for maxillofacial silicone, making it valuable for applications such as maxillofacial prosthetics that require UV protection.