Journal of Dental Materials and Techniques
Volume:9 Issue: 4, Autumn 2020

Our goal is to demonstrate an appliance that can prevent post-burn microstomia. Perioral burns result in contracture of facial tissue during healing. It may cause limited oral access due to the sphincteral nature of orbicularis oris muscle. The literature has demonstrated that burn contractures and scar formation can be modified with pressure and splinting. Technique: The patient was a 50-year-old woman who had a 3rd degree burn. She had been treated with medicinal and palliative treatments, but due to burn scar that involved all her peri-oral tissues she had progressive microstomia. We fabricated microstomia prevention device for her in order to prevent further progression of microstomia. As the patient was completely edentulous, we decided to fabricate a tissue-supported appliance. This appliance is made with very simple equipment and is easy to fabricate.

The incidence of oral and dental lesions increases with age, which can negatively affect the quality of life.The aim of this study was to evaluate the oral and dental status, oral health-related quality of life (OHRQoL), and the associated factors in a population of institutionalized elderly in Southeast Iran.

This cross-sectional study was conducted on 90 institutionalized elderly who were 60 years old or older. Oral examinations were carried out using mirror and probe under proper light. In addition to recording oral lesions, the dental status of the elderly was determined according to the WHO’s criteria. The geriatric oral health assessment index (GOHAI) questionnaire was used to determine OHRQoL. Factors such as age, gender, education, smoking, systemic disease, and the use of denture were recorded for each participant. Data were analyzed by appropriate statistical tests using SPSS software.

Forty three percent of the participants had oral conditions. Fissured tongue was the most common oral lesion. The prevalence of oral lesions in females was more than twice that of males (p <0.001). The mean DMFT was 25.6±7.3, and no relationship was found between DMFT and age, gender, education, smoking or systemic diseases (P>0.05). The mean GOHAI in the elderly was 42.8±9.7. Smoking and the presence of oral lesions significantly decreased OHRQoL (p <0.05).

The oral and dental status and consequently OHRQol of the elderly were relatively poor. The need for planning to promote the oral and dental health care aiming at improving the quality of life should be emphasized in this region.

While different preparation designs on anterior laminates have been investigated in several studies, a clear understanding of the tooth subtract type support on laminate veneer structural integrity using finite element analysis is still lacking. Therefore, the aim of present study is to evaluate stresses and displacements with different thickness restoration material and prepared tooth subtract using Finite Element Analysis (FEA). A 3D FEA models of maxillary central incisors restored with two ceramic systems Feldspathic ceramic and IPS e.max press, according to three different preparation surfaces (all-enamel, half-enamel-half-dentin, all-dentin). It has been evaluated von Mises and principle stress and displacement on the incisal surface along with the long axis by applying 50 N. Load. The smallest von Mises stresses were found at Feldspathic ceramic. The lowest stresses were seen in veneers adhered to enamel surface. The greatest stress occurred in the incisal third of IPS e.max press, which is only adhered to dentin surface. While the other five veneers displayed the highest von Mises stress values on cervical margin. Displacement analysis showed that the most ideal result was obtained by using 0.3 mm thick IPS e.max press laminate veneer adhered on enamel. The highest principal stresses were obtained in the cervical area. The greatest stresses occurring on tooth was seen in the dentine in IPS e.max press with the greatest restoration thickness. As the thickness of the restorations increased, the stress on the restoration and tooth increased.

There are numerous commercially available dentin replacement materials but radiopacity level of these materials is unknown. The aim of this study was to evaluate radiopacity of seven dentin replacement materials in Class I cavities using a digital analysis system. TheraCal LC, Biodentine, Calcimol LC, Ultra-Blend Plus, Equia Forte, Ionoseal, and ApaCal ART were used as dentin replacement materials. Seventy molar teeth were prepared with Class I cavities and then were divided into seven groups. Each material tested was placed on floor of the cavity and then filled by Filtek Z250 composite (3M ESPE). Radiographic images were taken using an indirect digital system. Also, one disc-shaped specimen from each material was examined by energy-assisted X-ray spectroscopy for composition analysis. Radiopacity values were significantly different among materials (p < 0.0001). Ultra-Blend Plus had the lowest radiopacity values. Calcimol LC, Equia Forte, and Ionoseal had significantly higher radiopacity levels compared to other materials and enamel. All materials demonstrated significantly higher radiopacity than dentin. Materials tested had different types and amounts of radiopacifier elements. Dentin replacement materials with lower radiopacity levels can create clinical challenges for diagnostic observations on margins.

The aim of this in vitro study was to compare the microtensile bond strength of glass ionomer to carious dentin in primary molars that were treated with silver diamine fluoride (SDF) to that of primary molars treated with silver diamine fluoride and potassium iodide (SDF/KI). Thirty-nine extracted carious primary molar samples were prepared and divided into two groups. Twenty samples received two applications of SDF and 19 samples received two applications of SDF/KI.  All samples were restored with glass ionomer (EQUIA Forte). The samples were tested using a vertical displacement test to evaluate the microtensile bond strength. The microtensile bond strength of the glass ionomer to carious dentin was greater in the teeth treated with SDF/KI than in the teeth treated with SDF alone. The results were statistically significant with a p-value Pretreatment of carious dentin with silver diamine fluoride and potassium iodide resulted in a greater microtensile bond strength to a glass ionomer when compared to carious dentin treated with silver diamine fluoride alone.

 Anemia of chronic disease (ACD) is the second most common form of anemia after iron deficiency anemia. This type of anemia occurs in cases of chronic infections, inflammatory conditions, or neoplastic disorders and even in presence of enough iron and required vitamins. Some previous studies have suggested that periodontitis, as a chronic disease, is likely to be associated with this type of anemia. The aim of this study is to investigate the possible effect of non-surgical periodontal therapy on improvement of blood parameters.

This study was performed on 36 male patients with chronic moderate or severe periodontitis (divided into case and control groups) and 18 men with healthy periodontium. Blood samples such as hematocrit, hemoglobin, MCH, MCHC, MCV and Ferritin were collected from participants. Then periodontal treatment was started for case group.

In the case group, there was a significant increase in hematocrit, hemoglobin, MCH, MCHC and MCV after 8 weeks of treatment and there was no significant decrease of Ferritin. No significant differences in blood parameters were observed in periodontally healthy and control groups.

According to significant differences in some mentioned blood parameters after non-surgical treatment, it seems that periodontal assessment and subsequent therapy can be recommendable as an adjunctive part in overall treatment plan of anemic patients.

Gender determination can help establishing a biological profile of the human body remains. Since the pelvic and skull remains are the most unyielding parts of human skeleton, identifying the dead bodies from these two parts would be very useful. After coaxial bone, the skull is the most gender-discriminated portion of the human skeleton. Since no determination study have been reported in Iranian population, present study aimed to determine gender by measuring 12 craniomandibular parameters and provide specific discriminant function scores in a selected population in Mashhad, Iran.

a total of 202 digital lateral cephalograms of healthy adults, (101 males and 101 females) in the age range of 18 to 50 years were selected. 14 cephalometric points were utilized, which enabled tracing of 11 linear measurements and an angle. All cephalometric points and measurements were traced by onyxceph® version 2.6 software.

Based on the analyses, among the chosen parameters, facial height (N-Me), mandibular ramus height (AR-Go), mandibular plane (Me-Go), frontal sinus width (FsWd) contributed the most for sexual dimorphism. The discrimination accuracy was 87.6% (84.2% in males and 91.1% in females). All the linear measurements were significantly larger in males except for angular variable which showed no significant difference between the two genders. 

According to the present findings, cephalometric craniomandibular parameters could be utilized to discriminate the gender of human remains using discriminant function analysis (DFA) in the selected Iranian population.

Sialolith is the most common condition of the salivary gland disorders after mumps, which usually occurs in the submandibular gland. A rare case of giant parotid sialolith is described.

A 58-years-old man with a complaint of swelling in the buccal area referred to the Department of Oral Medicine of the Dental School of Semnan University. A mild swelling was observed in the right cheek area in front of Ramus during the extraoral examination. Iintraoral evaluation revealed a 2.5 × 2 cm swelling with same color of the mucous membrane, adjacent to the maxillary first molar at the Parotid Papilla area, and with a stony-hard consistency. In the radiographic imaging, an estimated 18×6 mm homogenous opaque lesion was recognized; hence, the sialolith diagnosis was suggested. Surgical removal with electrocautery was done and no complaints were reported one month after the surgery.

Since giant sialolith can lead to complications which may affect patients’ quality of life, surgical treatment of such lesion is strongly recommended.