cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7510019.v1
title: Dens invaginatus: case report

description: Dens invaginatus is one of the most frequent malformations in dental elements. It can affect all teeth, even primary and supernumerary ones. It consists of an invagination of the crown surface, which happens during odontogenesis and penetrates the interior of the pulp chamber of the dental elements involved. In some cases, it can reach the apical tooth area. The maxillary lateral incisor is the most common site of occurrence. Due to its complex and variable anatomy, the tooth may present pulp necrosis and open apex, making it difficult to salvage. Oehlers classified them into types I, II, and III according to their complexity. This article reviews the literature and describes the treatment of a maxillary central incisor with type II invagination. The invaginated structure in this case detached due to various instrumentations during the change of dressing phase, facilitating root canal filling. In conclusion, this case shows that many methods are capable of removing the invaginated area of a dens invaginatus type II.
DOI: 10.17632/7rgmw7z55n.1
title: THE COMPRESSIVE STRENGTH OF CONCRETE MADE USING CEMENT PRODUCED IN TANZANIA

description: This paper presents the compressive strength of concrete made using cement produced in Tanzania. The data presented in this paper is based on extensive laboratory testing of the concrete cube compressive strength made at different water-cement ratio using cement from four factories manufacturing cement in Tanzania. The relationship between the water-cement ratio and cube compressive strength are presented. The developed tables can serve as a starting point for carrying out concrete mix design using cement produced in Tanzania and can be used by prospective bidders to estimate the amount of cement required to produce a certain grade of concrete during bidding.
DOI: 10.6084/m9.figshare.7506410
title: Oral health self-perception evaluation using mandibular overdenture prosthesis in public health care

description: Objective: The aim of this study was to evaluate the impact on oral health in patients who used to have conventional lower denture and then started using a model of overdenture prosthesis for the purpose of its use in public health care. Methods: For this clinical trial study, 23 volunteers participated in the sample. To stabilize the prosthesis three implants were used and immediately loaded. Only one punch was needed for each implant to be installed, neither a flap nor suture was necessary. To evaluate the oral health self-perception the volunteers answered the OHIP-14 questionnaire twice, the first time before the treatment when they still used the conventional lower denture, and the second time within an average of 36 days after the use of the prosthesis stabilized by the implant/O-ring together. For statistical analysis, exploratory data analysis was initially performed and then the nonparametric Wilcoxon test was applied considering a significance level of 5%. Results: The average age of the sample was 57.6 years old (SD=9.0) with a minimum age of 43 and maximum of 74 years old. The results show a significant decrease in all domains after the treatment, functional limitation (p=0.0002), physical pain (p&lt;0.0001), psychological discomfort (p=0.0002), physical disability (p&lt; 0.0001), psychological disability (p=0.0008), social disability (p=0.0431) and handicap (p=0.0015). Conclusion: It was concluded that the model of overdenture prosthesis improved the volunteers oral health self-perception.
DOI: 10.6084/m9.figshare.7506410.v1
title: Oral health self-perception evaluation using mandibular overdenture prosthesis in public health care

description: Objective: The aim of this study was to evaluate the impact on oral health in patients who used to have conventional lower denture and then started using a model of overdenture prosthesis for the purpose of its use in public health care. Methods: For this clinical trial study, 23 volunteers participated in the sample. To stabilize the prosthesis three implants were used and immediately loaded. Only one punch was needed for each implant to be installed, neither a flap nor suture was necessary. To evaluate the oral health self-perception the volunteers answered the OHIP-14 questionnaire twice, the first time before the treatment when they still used the conventional lower denture, and the second time within an average of 36 days after the use of the prosthesis stabilized by the implant/O-ring together. For statistical analysis, exploratory data analysis was initially performed and then the nonparametric Wilcoxon test was applied considering a significance level of 5%. Results: The average age of the sample was 57.6 years old (SD=9.0) with a minimum age of 43 and maximum of 74 years old. The results show a significant decrease in all domains after the treatment, functional limitation (p=0.0002), physical pain (p&lt;0.0001), psychological discomfort (p=0.0002), physical disability (p&lt; 0.0001), psychological disability (p=0.0008), social disability (p=0.0431) and handicap (p=0.0015). Conclusion: It was concluded that the model of overdenture prosthesis improved the volunteers oral health self-perception.
DOI: 10.6084/m9.figshare.7519106
title: Retention evaluation of two glass ionomer cement sealants: six-month clinical follow-up

description: Objective: The aim of this study was to evaluate the retention of glass ionomer sealant, Vitro Molar(r) (DFL) and Ketac Molar Easy Mix(r) (3 m ESPE) as pit and fissure sealants on first permanent molars, fully or partially erupted. Methods: The study sample consisted of 412 molars, among 110 children. The sealant retention was evaluated after 6 months of the application. Results: The results were collected through digital photographs and the retention results were assessed by the following System: score 0 - total retention; score 1 - sealant present in more than 50% of the pit and fissure system; score 2 - sealant present in less than 50% of the pit and fissure system; score 3 - missing sealant. Regarding the presence of the sealants in less than 50% of the occlusal surface, lower percentages were found for the two materials used as follows: score score 2 - Vitro Molar(r) (9,52% examiner 1 and 11.9% examiner 2) and score 2 - Ketac Molar Easy Mix(r)(9.52% examiner 1 and 10.71% examiner 2). Approximately 90% of the teeth sealed with Ketac Molar Easy Mix(r)or Vitro Molar(r) presented total loss (score 3). Thus, there was no statistical difference between the materials and between the examiners (p&gt;0.05). Conclusion: Therefore it was concluded that the sealant retention in the studied population was not satisfactory for any of the materials used.
DOI: 10.6084/m9.figshare.7519106.v1
title: Retention evaluation of two glass ionomer cement sealants: six-month clinical follow-up

description: Objective: The aim of this study was to evaluate the retention of glass ionomer sealant, Vitro Molar(r) (DFL) and Ketac Molar Easy Mix(r) (3 m ESPE) as pit and fissure sealants on first permanent molars, fully or partially erupted. Methods: The study sample consisted of 412 molars, among 110 children. The sealant retention was evaluated after 6 months of the application. Results: The results were collected through digital photographs and the retention results were assessed by the following System: score 0 - total retention; score 1 - sealant present in more than 50% of the pit and fissure system; score 2 - sealant present in less than 50% of the pit and fissure system; score 3 - missing sealant. Regarding the presence of the sealants in less than 50% of the occlusal surface, lower percentages were found for the two materials used as follows: score score 2 - Vitro Molar(r) (9,52% examiner 1 and 11.9% examiner 2) and score 2 - Ketac Molar Easy Mix(r)(9.52% examiner 1 and 10.71% examiner 2). Approximately 90% of the teeth sealed with Ketac Molar Easy Mix(r)or Vitro Molar(r) presented total loss (score 3). Thus, there was no statistical difference between the materials and between the examiners (p&gt;0.05). Conclusion: Therefore it was concluded that the sealant retention in the studied population was not satisfactory for any of the materials used.
DOI: 10.6084/m9.figshare.7511855
title: Reestablishment of the condyle-fossa and maxillomandibular relationships using a flat occlusal plane splint and implant-supported denture: case report with a 2-year follow-up

description: When the shape, structure, and/or function of one of the parts of the components of the stomatognathic system change, structural and physiological changes also occur to absorb or compensate the consequent loads. Hence, an insightful rehabilitation of this type of patient involves essential procedures, such as: correct orientation of the occlusal plane, determination of the vertical dimension of occlusion, and a stable and healthy maxillomandibular relationship, since the nonobservance of these aspects may result in prosthodontic rehabilitation failure. The objective of the present case study is to report the preoperative planning and prosthodontic rehabilitation of an edentulous patient with severe maxillary atrophy and signs and symptoms of temporomandibular disorders. The patient underwent flat occlusal plane splint therapy to reestablish the condyle-fossa and maxillomandibular relationships and muscle activity, followed by prosthodontic rehabilitation with implant-supported complete dentures. The maxillomandibular relationship was determined by the intraoral tracing technique, with a 24-month follow-up.
DOI: 10.6084/m9.figshare.7511855.v1
title: Reestablishment of the condyle-fossa and maxillomandibular relationships using a flat occlusal plane splint and implant-supported denture: case report with a 2-year follow-up

description: When the shape, structure, and/or function of one of the parts of the components of the stomatognathic system change, structural and physiological changes also occur to absorb or compensate the consequent loads. Hence, an insightful rehabilitation of this type of patient involves essential procedures, such as: correct orientation of the occlusal plane, determination of the vertical dimension of occlusion, and a stable and healthy maxillomandibular relationship, since the nonobservance of these aspects may result in prosthodontic rehabilitation failure. The objective of the present case study is to report the preoperative planning and prosthodontic rehabilitation of an edentulous patient with severe maxillary atrophy and signs and symptoms of temporomandibular disorders. The patient underwent flat occlusal plane splint therapy to reestablish the condyle-fossa and maxillomandibular relationships and muscle activity, followed by prosthodontic rehabilitation with implant-supported complete dentures. The maxillomandibular relationship was determined by the intraoral tracing technique, with a 24-month follow-up.
DOI: 10.17632/d95rbm9fmt.1
title: Dataset for Geochemistry and Geochronology of the Turbidite from the Rajang Group, Northwest Borneo, Malaysia: Origin and Tectonic Implications

description: Data for Geochemistry and Geochronology of the Turbidite from the Rajang Group, Northwest Borneo, Malaysia: Origin and Tectonic Implications
DOI: 10.6084/m9.figshare.7518287
title: Effect of the superficial treatment in the repair of silorane-based composite aged artificially

description: Objective: To evaluate the effects of different surface treatments, in repair bond strength of an aged silorane-based composite. Methods: Specimens were made of a silorane-based composite (P90, 3M/ESPE), aged with thermal-cycling (10,000 cycles; 5-55ºC) and randomly submitted to different surface treatments (each group n = 24): control group (no repair); group 1 (only application of P90 adhesive); group 2 (diamond bur asperization + P90 adhesive); group 3 (aluminum oxide sandblasting + P90 adhesive) and group 4 (asperization + sandblasting + P90 adhesive). Then, the specimens were repaired with the same silorane-based composite and each group randomly subdivided into 2 subgroups: stored in distilled water at 37 °C for 7 days or submitted to thermal-cycling (5,000 cycles). After aging, the tensile test was carried out. The data was submitted to 2-way analysis of variance (2-way ANOVA). Results: The repaired groups aged with oven storage for 7 days did not statistically differ (p&gt;0.05) from the corresponding groups aged with thermal-cycling. The bond strength of the specimens was significantly influenced by the superficial treatment (p&lt;0.01). The highest values of tensile bond strength were found in groups 3 (20.76 ± 4.51 MPa) and 4 (20.67± 3.96 MPa), regardless of aging and repair. Conclusion: The repair of silorane-based composite showed to be stable after aging, and the superficial treatment with aluminum oxide sandblasting was the most effective.
DOI: 10.6084/m9.figshare.7518287.v1
title: Effect of the superficial treatment in the repair of silorane-based composite aged artificially

description: Objective: To evaluate the effects of different surface treatments, in repair bond strength of an aged silorane-based composite. Methods: Specimens were made of a silorane-based composite (P90, 3M/ESPE), aged with thermal-cycling (10,000 cycles; 5-55ºC) and randomly submitted to different surface treatments (each group n = 24): control group (no repair); group 1 (only application of P90 adhesive); group 2 (diamond bur asperization + P90 adhesive); group 3 (aluminum oxide sandblasting + P90 adhesive) and group 4 (asperization + sandblasting + P90 adhesive). Then, the specimens were repaired with the same silorane-based composite and each group randomly subdivided into 2 subgroups: stored in distilled water at 37 °C for 7 days or submitted to thermal-cycling (5,000 cycles). After aging, the tensile test was carried out. The data was submitted to 2-way analysis of variance (2-way ANOVA). Results: The repaired groups aged with oven storage for 7 days did not statistically differ (p&gt;0.05) from the corresponding groups aged with thermal-cycling. The bond strength of the specimens was significantly influenced by the superficial treatment (p&lt;0.01). The highest values of tensile bond strength were found in groups 3 (20.76 ± 4.51 MPa) and 4 (20.67± 3.96 MPa), regardless of aging and repair. Conclusion: The repair of silorane-based composite showed to be stable after aging, and the superficial treatment with aluminum oxide sandblasting was the most effective.
DOI: 10.6084/m9.figshare.7508156
title: Quantification of color variation of restorative materials used on pediatric dentistry after pigmentation

description: Objective: To quantify the color variation of two glass ionomer cements and a composite resin used in pediatric dentistry, after being immersed in different pigments agents. Methods: Using two glass ionomer cements (Ketac(tm) Molar and Photac(tm) Fil) and a microhybrid composite resin (Filtek(tm) z250), were produced 40 disks of each material (10 mm in diameter and 2 mm thick). The samples were soaked in artificial saliva (control group), coke, peach Ice Tea(r) and chocolate milk, for 72 hours in an oven at 37ºC. After this period, the samples were washed in 50 ml of distilled water. Finally, using the spectrophotometer, it was made the reading of results. The color change was measured according to the CIE L * a * b * system. Color changes were statistically analyzed using parametric one-way ANOVA and ANOVA with Welch correction, the nonparametric Kruskal-Wallis tests and post-hoc Tukey and Dunnet T3 with p≤ 0.05. Results: The immersion of restorative materials in different pigmentation agents caused a significant color variation on the samples. The agent who presented higher results was the Peach Ice Tea(r). The chocolate milk was the fluid with lowest pigmentation capacity of all restorative materials under study. The greater color variation was found on the Ketac(tm) Molar submerged in Coca-Cola(r) and the smallest on the Filtek(tm) z250 in chocolate milk. Conclusion: All restorative materials were shown to be susceptible to pigmentation by all agents. The Filtek(tm) z250 proved to have better color stability, followed by Photac(tm) Fil and finally by Ketac(tm) Molar.
DOI: 10.6084/m9.figshare.7508156.v1
title: Quantification of color variation of restorative materials used on pediatric dentistry after pigmentation

description: Objective: To quantify the color variation of two glass ionomer cements and a composite resin used in pediatric dentistry, after being immersed in different pigments agents. Methods: Using two glass ionomer cements (Ketac(tm) Molar and Photac(tm) Fil) and a microhybrid composite resin (Filtek(tm) z250), were produced 40 disks of each material (10 mm in diameter and 2 mm thick). The samples were soaked in artificial saliva (control group), coke, peach Ice Tea(r) and chocolate milk, for 72 hours in an oven at 37ºC. After this period, the samples were washed in 50 ml of distilled water. Finally, using the spectrophotometer, it was made the reading of results. The color change was measured according to the CIE L * a * b * system. Color changes were statistically analyzed using parametric one-way ANOVA and ANOVA with Welch correction, the nonparametric Kruskal-Wallis tests and post-hoc Tukey and Dunnet T3 with p≤ 0.05. Results: The immersion of restorative materials in different pigmentation agents caused a significant color variation on the samples. The agent who presented higher results was the Peach Ice Tea(r). The chocolate milk was the fluid with lowest pigmentation capacity of all restorative materials under study. The greater color variation was found on the Ketac(tm) Molar submerged in Coca-Cola(r) and the smallest on the Filtek(tm) z250 in chocolate milk. Conclusion: All restorative materials were shown to be susceptible to pigmentation by all agents. The Filtek(tm) z250 proved to have better color stability, followed by Photac(tm) Fil and finally by Ketac(tm) Molar.
DOI: 10.6084/m9.figshare.7514939
title: Effect of thermocycling in a hard denture liner and acrylic resin after different chemical and mechanical polishing

description: Objective: To evaluate the effect of aging in a hard denture reline (New Truliner) and an acrylic resin (Classic) after chemical and mechanical polishing. Methods: Eighty specimens were made, divided randomly between 8 groups: G1.Acrylic Resin Classic (RAC)/Mechanical Polishing (PM); G2.RAC/PM + thermocycling (TR); G3) RAC/Chemical Polishing (PQ); G4.RAC/PQ + TR; G5.New Truliner (NT)/PM; G6.NT/PM + TR; G7. NT/PQ; G8.NT/PQ + TR. The surface hardness was measured before and after polishing, and after TR. The impact resistance tests were measured after all applied treatments. The data were submitted to ANOVA and Tukey test (a=5%). Results: Regardless of the polishing, it was noted that RAC presented significantly higher surface hardness than NT; PM had higher hardness in both materials compared with PQ; on both polishing, the impact resistance of the RAC was higher than NT. Independently of TR test, the impact resistance of the materials that received PQ was higher than received PM. The PQ caused greater changes in properties than the PM. Conclusion: Aging and chemical and mechanical polishing influenced the physical and mechanical properties of hard denture reline and acrylic resin.
DOI: 10.6084/m9.figshare.7514939.v1
title: Effect of thermocycling in a hard denture liner and acrylic resin after different chemical and mechanical polishing

description: Objective: To evaluate the effect of aging in a hard denture reline (New Truliner) and an acrylic resin (Classic) after chemical and mechanical polishing. Methods: Eighty specimens were made, divided randomly between 8 groups: G1.Acrylic Resin Classic (RAC)/Mechanical Polishing (PM); G2.RAC/PM + thermocycling (TR); G3) RAC/Chemical Polishing (PQ); G4.RAC/PQ + TR; G5.New Truliner (NT)/PM; G6.NT/PM + TR; G7. NT/PQ; G8.NT/PQ + TR. The surface hardness was measured before and after polishing, and after TR. The impact resistance tests were measured after all applied treatments. The data were submitted to ANOVA and Tukey test (a=5%). Results: Regardless of the polishing, it was noted that RAC presented significantly higher surface hardness than NT; PM had higher hardness in both materials compared with PQ; on both polishing, the impact resistance of the RAC was higher than NT. Independently of TR test, the impact resistance of the materials that received PQ was higher than received PM. The PQ caused greater changes in properties than the PM. Conclusion: Aging and chemical and mechanical polishing influenced the physical and mechanical properties of hard denture reline and acrylic resin.
DOI: 10.6084/m9.figshare.7511081
title: Effect of different post-cure polymerization treatment on composite resin hardness

description: Objective: To evaluate the influence of different additional polymerization methods on the microhardness of two direct composite resins. Methods: Direct Composite resins samples (Fill Magic and Opallis) and a Laboratory Composite Resin (Ceramage) were lightcured according to manufacturer instructions. Then, the direct resins were submitted to additional polymerization. Experimental groups were divided into (n = 5): group 1: Conventional Polymerization; group 2: Extra Light (80s); group 3: Autoclave; group 4: Laboratory Resin Ceramage. Vickers hardness test was carried out after a week of light-free storage in water, and results were subjected to ANOVA / Tukey statistical analysis. Results: Resin Lab Ceramage showed higher astatistically significant microhardness within all other resins in this study (p £ 0.05); Fill Magic showed no statistically significant difference between the groups tested compared to its control (p&gt; 0.05); Opallis resin submitted to autoclave was the only method that showed a higher statistically significant difference compared to the control group (p £ 0.05). Conclusion: It concludes that hardness of a direct composite resin tested - Opallis - was increased by Autoclave post-cure polymerization, however, not enough to achieve the hardness of a laboratory composite. Furthermore, increasing lightcuring time does not produce a harder surface.
DOI: 10.6084/m9.figshare.7511081.v1
title: Effect of different post-cure polymerization treatment on composite resin hardness

description: Objective: To evaluate the influence of different additional polymerization methods on the microhardness of two direct composite resins. Methods: Direct Composite resins samples (Fill Magic and Opallis) and a Laboratory Composite Resin (Ceramage) were lightcured according to manufacturer instructions. Then, the direct resins were submitted to additional polymerization. Experimental groups were divided into (n = 5): group 1: Conventional Polymerization; group 2: Extra Light (80s); group 3: Autoclave; group 4: Laboratory Resin Ceramage. Vickers hardness test was carried out after a week of light-free storage in water, and results were subjected to ANOVA / Tukey statistical analysis. Results: Resin Lab Ceramage showed higher astatistically significant microhardness within all other resins in this study (p £ 0.05); Fill Magic showed no statistically significant difference between the groups tested compared to its control (p&gt; 0.05); Opallis resin submitted to autoclave was the only method that showed a higher statistically significant difference compared to the control group (p £ 0.05). Conclusion: It concludes that hardness of a direct composite resin tested - Opallis - was increased by Autoclave post-cure polymerization, however, not enough to achieve the hardness of a laboratory composite. Furthermore, increasing lightcuring time does not produce a harder surface.