Evaluation of a Hypersensitivity Inhibitor Containing a Novel Monomer That Induces Remineralization—A Case Series in Pediatric Patients

Background: Recently, tooth deformities have been frequently encountered by pediatric dentists. Severe enamel hypomineralization sometimes induces pain such as hyperesthesia, but composite resin restoration is difficult because it often detaches without any cavity preparation. Resin-based hypersensitivity inhibitors for tooth physically seal the dentinal tubules. It was reported that hypersensitivity inhibitor containing novel adhesive monomers forms apatite and induces remineralization in vitro. Therefore, these clinical trials assessed the clinical effects of remineralization and the suppression of hypersensitivity by the new agent. Methods: After mechanical tooth cleaning was performed, the hypersensitivity inhibitors were applied and cured by light exposure. Changes in hypersensitivity were determined by visual analog scale (VAS). The improvement of hypomineralization was evaluated by the change in color tone based on the digital images of intraoral photographs. Results: After repeated monthly treatments, these cases showed decreased hypersensitivity after the fourth application, while the opaque white and brownish color improved on the seventh application. Conclusion: This novel hypersensitivity inhibitor with C-MET and MDCP not only suppressed hypersensitivity but also improved cloudiness and brown spots in immature permanent teeth in presented cases.

The knowledge level of dental students on color stability composite resin restoration in the COVID-19 pandemic era

During the COVID-19 pandemic in Indonesia, all professional program students learning online and still expected to have good knowledge including dental materials. Color stability of anterior teeth restoration is the most important thing. Professional program students with a good level of knowledge were expected to support the use of composite resin towards patients without causing discoloration. The aim of this study was to assess the knowledge level of professional program students towards color stability of composite resin restoration in the Faculty of Dentistry, Universitas Trisakti in the COVID-19 pandemic era. This was a descriptive observational study using a cross-sectional approach. Data were collected using Google Form with a questionnaire that had been tested for validity and reliability. The sample was 100 professional program students who met the inclusion criteria and accepted informed consent. This study found that in the COVID-19 pandemic era, the knowledge level of 49 respondents (49%) was good, 37 respondents (37%) were fairly good and 14 respondents (14%) were less good. The majority of the professional program students of the Faculty of Dentistry, Universitas Trisakti were in the good category of knowledge about the color stability of composite resin restoration.

POLYETHYLENE FIBER-REINFORCED STRESS-REDUCED COMPOSITE RESIN RESTORATION ON EXTENSIVE CARIOUS LESION: A CASE REPORT

The purpose of this article about the use of polyethylene fibers and resin composite to treat large carious tooth providing a high strength restoration within one appointment. Polyethylene fibers decrease the polymerisation shrinkage and increase the fracture resistance of the teeth. The polyethylene fibers, besides offering the proper strength to the mastication forces, as well reduce the risk of fractures, voids and micro-filtration.

Scanning Electron Microscope Image Analysis of Bonding Surfaces following Removal of Composite Resin Restoration Using Er: YAG Laser: In Vitro Study

It is impossible to remove tooth-colored restorations by mechanical means without unnecessary damage to the adjacent sound tooth structure. This study is aimed at investigating erbium-doped yttrium aluminum garnet (Er: YAG) laser (Hoya ConBio, VersaWave, CA, USA) in removing composite resin restorations and assessing the change in morphology of bonding surfaces using a scanning electron microscope (EDX, CAMSCANNER, 3200LV, UK). The investigators collected thirty extracted sound human premolar teeth for this investigation, and the conventional design class V cavity was prepared on the buccal surface of each specimen. The specimens were allocated randomly into three groups, according to the procedure used for the ablation of the composite restoration: group A (high-speed diamond fissure bur), group B, and group C (Er: YAG laser) using a different pulse repetition rate of 20 Hz (group B) and 25 Hz (group C). The AutoCAD software program (Autodesk, Inc., 2016) was used to calculate the surface area and the resulting dimensional change of the cavities after restoration removal. The cavities were filled with composite resin and randomly assigned into two groups conforming to the methods applied to eliminate the restoration; diamond turbine fissure bur and laser. In each group, two specimens were selected randomly for scanning electron microscope analysis of bonding surfaces. The least meantime for the composite resin removal was observed in the high-speed diamond bur, significantly less than both Er-YAG laser groups ( p < 0.001 ). However, at a higher pulse repetition rate, time-consuming decreased. The results showed that laser is more conservative in removing composite resin restoration as the change was most remarkable in group A (0.800 mm), then group C (0.466 mm), and the slightest change is in group B (0.372 mm) ( p = 0.014 ). The dentin surface of group A showed a smooth surface with no opened dentinal tubule and intact smear layer. In groups B and C, dentin surfaces were irregular, scaly, or flaky, and dentinal tubules were opened without a smear layer. Therefore, Er: YAG laser is effective for composite resin removal considering the parameters chosen in this study with fewer changes in cavity surface area and better microretentive features.

Sectional matrix system in reconstruction of proximal contact in class ii resin restoration

Background: Clinicians always faces some challenges to reconstruct proper proximal contact while restoring class-II cavity with composite resin due to its viscosity, elastic property and polymerization shrinkage. It has been claimed that use of sectional pre-contoured matrix band with separation ring will produce more reliable result for reconstruction of optimal proximal contact in class II composite resin restoration. Purpose: To evaluate the efficacy of sectional pre-contoured matrix band with separation ring for reconstruction of optimal proximal contact in class II resin composite restoration. Methodology: One Nissin manikin model having the facility of placing and screwing all upper and lower sets of artificial human teeth and sixty-two (62) artificial human mandibular permanent 1st molar teeth were collected. These 62 artificial human mandibular permanent 1st molars were randomly assigned in two groups (A & B) having 31 teeth in each. Standardized class II MO (mesio-occlusal) cavity were prepared on total 31 artificial 1st molar in group A. The 2nd premolar in the manikin model was replaced by metal cast duplicate and permanently fixed into the socket. All the Thirty-one (31) 1st molar teeth in group A, having Prepared class II cavity in each, were replaced one by another in the manikin distal to cast duplicated 2nd premolar and restored with composite resin by using sectional pre-contoured matrix band with separation ring and another 31 uninstrumented intact artificial 1st molars were include in group B as a reference group. After completion of restoration, newly developed proximal contact points were measured by using universal testing machine one after another. Same were also done in intact reference Group B. Measurement was done to assess the position of contact point, contact tightness and contact area of Group A and Group B on the same typodont. The results were analyzed statistically with post hoc Bonferroni test (P<0.05). Result: Teeth restored with sectional pre-contoured matrix with separation ring (group A) provided the tighter contact and broadened area of contact where all the contact points were placed more occlusally compared to that of the intact un-instrumented reference teeth (group B).Statistically significant differences (P<0.05) were produced in all the three parameters with each other. Conclusion: Teeth restored with sectional pre-contoured matrix band with separation ring failed to reconstruct the optimal proximal contact in class-II composite resin restoration in comparison to intact uninstrumented reference tooth. Update Dent. Coll. j: 2021; 11(2): 16-19

COMPOSITE RESIN RESTORATION WITH FIBER REINFORCED COMPOSITE AFTER ROOT CANAL TREATMENT OF NECROTIC PULP TOOTH WITH GUMBOIL

Gumboil is inflammation reaction in the gum caused by pulp infection. Gumboil is seen as an oral lesion characterized by a soft erythematous papule where a periapical abcess is draining into the oral cavity. An adequate root canal treatment can cure gumboil and remove bacteria from the root canal. To support the success of root canal treatment, final restoration used in this case is composite resin restoration with reinforcing fiber (short fiber reinforced composite). The purpose of this treatment was to restore the functions of tooth in mastication and preserving the supporting tissue. A female patient age 23 years old came with complaints of pain in the lower right mandibular molar accompanied by swelling of the gums around the teeth since a week ago. Swelling is intermittent since last 3 months. The tooth have been restored for about 3 years ago. Clinical examination showed a positive percussion, positive palpation, negative vitality, and negative mobility. Radiographic examination showed bifurcation and periapical lesions. Root canal treatment is performed with crown down preparation technique and followed by direct composite resin restoration with short fiber reiforced composite. The success of root canal treatment followed by composite resin restoration with short fiber reinforced fiber is marked by the absence of complaints as well as the dissappearance of gumboil.

Investigation of the Impact of Dental Care via Composite Resin Restoration among Children with Attention Deficit Hyperactivity Disorder: A Registry-Based Nested Case–Control Study

Attention deficit hyperactivity disorder (ADHD) is one of the most common psychiatric conditions. Many studies have shown that exposure to low-dose bisphenol-A (BPA) can contribute to ADHD. The relationship between ADHD and composite resin is still unclear. We designed a nested case–control study to investigate the relationship between ADHD and composite resin restorations among children from the Taiwan’s National Health Insurance Research Database. We included 85,503 people whose birth years were between 1998 and 2005 and who received resin restoration from January 2000 to December 2008. A 1:2 matched control sample without ADHD was randomly selected from the database by propensity score matching based on birth year and sex. We identified 4984 individuals as ADHD patients. The average diagnostic age of ADHD was 7.45 years old. The patients who received composite resin restorations had higher risk of ADHD than those who had never received them (aOR (adjusted odds ratio) = 1.25; 95% CI (confidence interval) = 1.13–1.38). Males had a higher risk of ADHD (aOR = 1.29; 95% CI = 1.14–1.43). Taken together, this nested case–control study demonstrated a positive association between ADHD and dental care via composite resin restoration in Taiwanese children. Prospective clinical studies of the relationship between ADHD and composite resin are warranted.

BULK FILL COMPOSITE RESIN RESTORATION TECHNIQUES REPLACE INCREMENTAL TECHNIQUES

Introduction. Shrinkage during the polymerization process is the main disadvantage of using composite resins because it creates pressure between the tooth and the restoration which causes failure of the adhesion of the composite resin to the tooth, micro-fissures, and cuspid deflection. Review. To reduce shrinkage that occurs, it is known that conventional composite resins must be inserted into the cavity incrementally or in layers with a maximum thickness of 2 mm per layer. However, the incremental insertion method has several disadvantages, namely that it requires a longer clinical time for restoration. To overcome the shortcomings of these conventional composites, Bulk-fill composite resin was introduced. Composite bulk fill is a sophisticated technology that allows composites to be directly placed on the restoration, has a low polymerization shrinkage to reduce micro-leakage, reduces stress in the presence of elasticity, increases the depth of at least 4 mm translucent at the time of application, is very conducive to light transmission, is more flowable to allow adaptation to the cavity, including cervical margins, it is easy to apply with minimal handling and is resistant to large stresses. Conclusion. With the characteristics possessed by the Bulk-fill composite resin, it is known that the bulk-fill technique in addition to reducing the clinical application time, can also improve the edge adaptation between the restoration and the tooth compared to the incremental technique, without reducing its physical strength

Analysis of Composite Resin Treatment Pattern Changes After the Insurance Coverage

Since January 2019, insurance coverage for caries treatment of permanent teeth using composite resin in children aged 12 and under has started in South Korea. The purpose of this study was to compare the pattern of permanent molar composite resin restoration aged 12 and under before and after the insurance coverage from January 2009 to March 2020 in the Department of Pediatric Dentistry at Kyung Hee University Dental Hospital at Gangdong.<br/>Since the insurance coverage was started in 2019, the frequency of permanent molar composite resin restoration aged 12 and under has increased more than twice. There was a significant change in frequency of resin restoration by shape of cavity comparing before and after the insurance coverage, whereas there was no significant difference in changes by patient age, gender and position of tooth.<br/>As accessibility to the permanent tooth composite resin restoration is increased by the insurance coverage, which shows a fair survival rate, it is expected that it could be able to secure oral health in the early permanent dentition aged 12 and under.