Li informem dels canals usuals corresponents per al dipòsit, articles de revista: es dipositen a través de GREC (https://www.uv.es/sbiblio/Roderic/com_dipositar_articles_GREC.pdf). Altres documents com llibres o capítols de llibre (https://www.uv.es/sbiblio/Roderic/guia_investigaci%c3%b3_2024.pdf), s’han de dipositar directament en el repositori institucional RODERIC.

Journal of Clinical and Experimental Dentistry. 2024. Vol. 16, no. 04

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https://hdl.handle.net/10550/98354

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Temporomandibular joint dysfunction in relation to tinnitus in Peruvian patients: A cross-sectional study
(Medicina Oral S.L, 2024) Miyamoto-Aldave, Toshi-Hiromi; Asmat-Abanto, Angel-Steven; Ulloa-Cueva, Delia-Margarita; Minchón-Medina, Carlos-Alberto; Llanos-Vera, Víctor-Eduardo; Callirgos-Briones, Jannette-Vanessa
BACKGROUND: To determine the relationship between temporomandibular joint dysfunction (TMJD) and tinnitus in Peruvian adult patients. MATERIAL AND METHODS: This observational and cross-sectional study was conducted between April and May 2023, including 76 adult patients from the Otorhinolaryngology Service of Víctor Lazarte Echegaray Essalud Hospital in Trujillo (Peru). The intra- and inter-rater reliability was determined for the clinical measurement of TMJD, obtaining Kappa values above 0.995. To diagnose tinnitus, we worked with a doctor specializing in otolaryngology. Chi-square test and logistic regression were used to analyze results, considering a significance level of p<0.05. RESULTS: A relationship was found between TMJD and tinnitus (p=0.022), increasing the frequency of this disorder as temporomandibular involvement was higher (p=0.043). There was no relation between these disorders according to gender and age, nor in hypertensive patients (p=0.131) or patients suffering from migraine (p=0.147); however, a relationship was found between TMJD and tinnitus in patients with hearing loss (p=0.046). CONCLUSIONS: TMJD is associated with tinnitus in otorhinolaryngological and hypoacusis patients. However, in hypertensive and migraine patients, and according to gender and age, no relation was found between those disorders. Key words:Tinnitus, Temporomandibular Joint Disorders, Hearing Loss, Sensorineural, Audiometry, Migraine, Hypertension, Headache.
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A pilot study analyzing the influence of the material and the size of the orthodontic archwire on the level of pain and anxiety in adult patients in treatment with brackets: A prospective triple-blind randomized clinical trial
(Medicina Oral S.L, 2024) Marzal, Raquel; Albaladejo, Alberto; Curto, Adrián
BACKGROUND: The objective was to investigate the influence of the material and dimensions of the orthodontic archwire on the pain and anxiety in adult patients in orthodontic treatment with brackets. MATERIAL AND METHODS: A randomized prospective triple-blind clinical pilot study was conducted at the Dental Clinic of the University of Salamanca. The study sample comprised 30 adult patients who started orthodontic treatment with brackets. This sample was divided into two groups: the NiTi group (n=15) and Cu-NiTi group (n=15). Pain was analyzed with a visual analogue scale (VAS) and anxiety with the State-Trait Anxiety Inventory (STAI). Anxiety was assessed at the start of treatment (T0) and after one month (T1). Pain was analyzed at the start of treatment (T0), at different time points at the start (T01), and after 4 (T02), 24 (T03), and 48 hours (T04); these measurements were also recorded one month after starting orthodontic treatment (T11, T12, T13, and T14). RESULTS: The mean age of patients was 31.3 (± 6.05) years old. The highest level of pain, at the beginning of treatment, was observed after 48 hours (5.57 ± 1.72) and at one month after starting treatment at 24 hours (5.13 ± 1.89), with no significant differences between the two groups. When analyzing anxiety, no differences were observed between groups; the anxiety levels were higher one month after starting treatment compared to the start. Regarding the correlation between pain and anxiety, the NiTi group showed a greater direct relationship (<0.05) between these two variables at the start of treatment in the anxiety trait in relation to pain at T02 and T03 and after a month in T12, T13, and T14. CONCLUSIONS: In the sample studied, there was no significant influence of the size or material of the orthodontic archwire on pain and anxiety levels. Key words:Orthodontics, Brackets, Archwire, Pain, Anxiety, NiTi, Cu-NiTi.
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Microleakage of Lithium Disilicate Veneers Bonded to Different Substrates with Light-cure and Dual-cure Resin Cements
(Medicina Oral S.L, 2024) Albaheli, Bahil-Imad; Elawsya, Mohamed-Elshirbeny; Ali, Ashraf-Ibrahim
BACKGROUND: This study aimed to evaluate the microleakage of lithium disilicate veneers with finish lines placed cervically in different substrates (enamel, dentin, and resin composite) and bonded with light-cure (LC) and amine-free dual-cure (DC) resin cements. MATERIAL AND METHODS: Forty-eight human maxillary central incisors were randomly assigned into three groups according to finish line substrate (n=16/group). Each group was subdivided randomly into two subgroups (n=8/subgroup) according to resin cement type: LC resin cement (Variolink Esthetic LC, Ivoclar Vivadent) and DC resin cement (Variolink Esthetic DC, Ivoclar Vivadent). All the specimens received lithium disilicate veneers (IPS e.max Press, Ivoclar Vivadent). After 5000 cycles of thermocycling, the microleakage was measured using the dye penetrating technique. Data were analyzed statistically using Scheirer Ray Hare test, Kruskal-Wallis H-test, and Mann-Whitney U-test. The level of significance was set at p ≤ .05. RESULTS: There was a statistically significant difference between different substrates in microleakage (p=.001), but there was no statistically significant difference between resin cements (p=.907), and there was no interaction between substrates and resin cements (p=.983). Microleakage was lesser when the finish line was placed at enamel and resin composite than at dentin. Similar leakage scores were observed with LC and DC resin cements. CONCLUSIONS: The finish line of ceramic veneer is suggested to be placed in enamel or good-quality resin composite restoration. Regarding microleakage and durability, LC and amine-free DC resin cements are suggested for ceramic veneer cementation. Key words:Different substrates, Dual-cure resin cement, Light-cure resin cement, Lithium disilicate veneers, Microleakage.
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Periodontal index and salivary Ph in first trimester´s pregnant women: A cross-sectional study
(Medicina Oral S.L, 2024) Lozano, Rocío-Paola; Asmat-Abanto, Angel-Steven
BACKGROUND: Recent reviews have suggested a possible association between periodontal disease and increasing risks during pregnancy, such as newborn low weight, premature birth, gestational diabetes mellitus and preeclampsia. Besides, being saliva a valuable source of information on general and buccal health, it is necessary to know its parameters associated with periodontal diseases; in order to help odontologists to better understand this disease, and provide a sound clinical treatment. Therefore, this research sought to assess the correlation between periodontal index, and salivary pH on first trimester pregnant women. MATERIAL AND METHODS: 71 pregnant women were evaluated by observational, transversal and correlational study, using the community periodontal index and salivary pH-meter. The Spearman coefficient was employed, considering a p value of 0.05. RESULTS: A correlation was found between periodontal index and salivary pH in first trimester pregnant women (p=0.039). According to age, correlations were found to be very weak in age group 18 to 24 years (p=0.605), and age group 25 to 35 years (p=0.071). Similarly, no strong correlation was found when pairing based on number of pregnancies (primiparous p=0.239 and multi pregnancy p=0.114). Also, 36.6% of pregnant women showed periodontal pockets smaller than 5 mm. CONCLUSIONS: With lower salivary pH, the periodontal index in pregnant women gets lower; however, no correlation could be found between age group and number of pregnancies. Key words:Periodontal index, periodontal pocket, periodontal diseases, saliva, pregnancy, pregnant women.
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Influence of Diabetes Mellitus and Universal Adhesive Application Mode on the Bond Strength of Composite Resin to Dentine
(Medicina Oral S.L, 2024) Attia, Reham; El-Bahrawy, Eman; Shebl, Eman; Rashed, Asmaa; El-Husseiny, Fatma
BACKGROUND: The aim of the current study was to evaluate the influence of diabetes mellitus and the mode of applying a universal adhesive on the shear bond strength of composite resin to dentin. MATERIAL AND METHODS: Forty teeth were extracted from diabetic individuals who had been living with diabetes for a period of 5 to 15 years. These forty teeth were divided into two groups: twenty molars from patients with type 1 diabetes and twenty molars from patients with type 2 diabetes. The remaining twenty sound human molars were collected from non-diabetic patients. The collected teeth were assigned into 3 groups, and each group was further divided into 2 subgroups. Group A (n = 20): non-diabetic (ND) where sub group IA: Universal adhesive applied in the total-etch mode (n = 10) and sub group IIA: Universal adhesive applied in the self-etch mode (n = 10). Group B (n = 20): diabetic type 1 (D1) where sub group IB: Universal adhesive applied in the total-etch mode (n = 10) and sub group IIB: Universal adhesive applied in the self-etch mode (n = 10). Group C (n = 20): diabetic type 2 (D2). Where Sub group IC: Universal adhesive applied in the total-etch mode (n = 10) and sub group IIC: Universal adhesive applied in the self-etch mode (n = 10). A Teflon mold measuring 3mm in diameter was attached to the dentin surface, used to build Filtek Z550 to a height of 3mm. The specimens were fixed to the universal testing to measure shear bond strength. RESULTS: There was a statistically significant difference of Mean ±SD of shear bond strength among the three tested groups. In group A, the Mean ±SD were (21.710 ± 0.638), it was decreased in group B to (14.626 ± 0.726) and group C to (17.740 ± 0.668). Subgroup I had lower shear bond strength values than subgroup II in all tested groups. The difference between each subgroup in groups A, B, and C was significant. CONCLUSIONS: 1. Diabetes mellitus has an adverse effect on the shear bond strength of composite to dentine. 2. Type 1 diabetes mellitus significantly reduces the shear bond strength of composite resin to dentin. 3. Shear bond strength of the universal adhesive was higher when applied to dentin using the self-etch mode, as compared to the total etch mode, in all groups, regardless of whether the participants had diabetes or not. Key words:Diabetes Mellitus, Universal Adhesive, Application Mode, Shear bond Strength, Dentine, Composite.
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Effect of various irrigation protocols and antioxidant application on bonding performance of two adhesive systems to coronal dentin
(Medicina Oral S.L, 2024) Omar, Nada; Salem, Haidy N.; Abdou, Ahmed; Moharam, Lamiaa M.
BACKGROUND: The aim was to evaluate the effect of different irrigation protocols and antioxidants application on the shear bond strength (SBS) of two different adhesive systems to deep coronal dentin at different temperature. MATERIAL AND METHODS: One hundred and twenty human premolar teeth were cut longitudinally in two halves, then the prepared specimens were allocated into four main groups according to the irrigation protocols; Distilled water (control), Sodium hypochlorite (NaOCl) + Ethylenediamine Tetra-acetic Acid (EDTA), and NaOCl + Editronate (HEDP), two subgroups according to irrigation solutions temperature; 4°C and 37°C, two divisions according to grape seed extract (GSE) application (with and without), and two subdivisions according to the applied adhesive systems; OptiBond-All-In-One (OPT) and ScotchBond Universal (SBU). Adhesives were applied in self-etch (SE) mode and resin composite material discs were built. Specimens were kept in distilled water for 24-h at 37°C before SBS testing. Four-way ANOVA and Tukey HSD tests were used for data analysis (α=0.05). RESULTS: 4°C irrigants solution temperature showed the least significant SBS values, distilled water group showed significantly higher SBS values compared to NaOCl + EDTA and NaOCl + HEDP groups respectively. GSE application improved dentin bond strength significantly within each adhesive. CONCLUSIONS: Increasing the temperature of the irrigation solutions has significantly enhanced the SBS of coronal dentin. Antioxidants application following different irrigation protocols has improved the SBS. Key words:Irrigation protocols, temperature, bond strength, coronal dentin, antioxidant, adhesive systems.
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Evaluation of the effect of surface roughness and modification of implant abutment axial wall on the retention of zirconium oxide copings before and after thermocycling
(Medicina Oral S.L, 2024) Amini, Parviz; Hejazi, Maryam; Taghva, Masumeh; Safari, Sina
BACKGROUND: The purpose of this study was to determine the effect of one-wall elimination of the abutment and also the surface treatment of the abutment on the retention of cement-retained, implant-supported zirconium oxide copings. MATERIAL AND METHODS: In this experimental study, four straight abutments were connected to four implant analogs (DIO, UF, Busan, Korea) with 35 Ncm torque. They are mounted vertically in resin blocks. Abutments were prepared as following groups: A) abutment was used in its intact standard form as a control group. B) 4 mm of the flat wall was removed to produce an abutment with 3 walls. C) The abutment surface was abraded with 50 µm AL2O3 powder. D) 4 mm of a flat wall of the abutment was removed, then the abutment surface was abraded with 50 µm AL2O3 airborne particle.10 zirconium oxide copings were made. Samples were cemented with temp bond NE to abutments. The retention of copings was measured before and after incubation using the universal testing machine. T-test, one-way ANOVA, and Post Hoc Tukey Test were used for statistical analysis of data. RESULTS: In all groups, retention was decreased after thermocycling (P ≤0.001). 3 wall abutments had less retention than the control group before thermocycling. A significant difference was detected between 3 wall abutments and 4 walls of sandblasted abutments before thermocycling. After thermocycling, no difference in retention was seen between groups. CONCLUSIONS: Thermocycling significantly reduces the retention of implant-supported ceramic copings. Sandblasting abutments with 50 µm AL2O3 air-borne particles did not increase the retention of ziconium oxide copings which were cemented with temp bond NE. One wall elimination of abutment decreased the retention of zirconia copings. Key words:Retention, crown, abutment, zirconia coping, sandblasting.
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Expression of p120 - catenin in oral squamous cell carcinoma and apparently normal mucosa adjacent to oral squamous cell carcinoma
(Medicina Oral S.L, 2024) Rajeev, Aishwarya; Katukuri, Saikumar; Devarashetty, Shravya; Dantala, Satyanarayana; Billa, Aishwarya-Lakshmi
BACKGROUND: An essential molecular occurrence in carcinogenesis that can lead to invasion and migration, predisposing cells to malignant transformation, involves alterations in cell adhesion molecules, such as p120 catenin. The destabilization of E-cadherin, caused by the loss or phosphorylation of p120 catenin (p120), regulates cadherin stability and turnover, impacting cell adhesiveness and migratory capacity. Consequently, p120 is associated with the invasiveness and progression of various human epithelial tumor types, including Oral Squamous Cell Carcinomas (OSCC). The present study aimed to assess and establish a correlation between the expression of p120 antibody in OSCC and Apparently Normal Mucosa Adjacent to OSCC (ANMAOSCC). MATERIAL AND METHODS: The immunoexpression of p120 in 300 selected cases was categorized into two groups: OSCC (n = 150) and ANMAOSCC (n = 150). Two 4µm-thick tissue sections from the selected blocks were prepared. One section was stained with Hematoxylin and Eosin, while the other underwent immunohistochemical (IHC) staining using anti-p120 catenin antibody (clone No. EP66; Catalog No. PR062; PathnSitu, Wayne, PA, USA). The analysis of p120 immunoexpression included parameters such as intensity, percentage, and the location of staining. RESULTS: In OSCC, over 80% of cases expressed p120, with only 16% exhibiting loss of expression. In ANMAOSCC, all cells maintained p120 expression. In OSCC, p120 was predominantly localized to the membrane and cytoplasm in 76%, while in ANMAOSCC, over 90% showed membrane localization. Regarding positivity, only 19% of OSCC cases reported positivity in >50% of cells, compared to 64.7% in ANMAOSCC. The extent of staining in ANMAOSCC was observed up to the granular layer (45%) and corneal layer (19%). CONCLUSIONS: The atypical staining pattern of p120 may indicate a loss of adhesion and could serve as a marker for identifying the malignant potential of ANMAOSCC and the aggressiveness of OSCC. Key words:Oral Squamous Cell Carcinoma, P120 Catenin, Cell Adhesion Molecules, Gene Expression Regulation.
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Microcystic Adnexal Carcinoma. A Rare Entity
(Medicina Oral S.L, 2024) Sada-Urmeneta, Angela; Benito-Anguita, Marta; Agra, Carolina; Gascon-Alonso, Dafne; Agea-Martinez, Marc; Navarro-Cuellar, Carlos; Verdaguer, Juan-Jose
BACKGROUND: Microcystic adnexal carcinoma is a rare malignant tumour derived from sweat glands, locally aggressive, but with low rate of lymphatic or metastatic spread. Tends to affect the deep dermis, without affection of epidermis. Surgery remains as the first line treatment. CASE REPORT: We present a case of a 46-year-old woman with a slow growing lesion of the upper lip, with biopsy diagnosis of microcystic adnexal carcinoma. She underwent a resection and reconstruction with local advancement flaps. The final anatomopathological study showed an adnexal epithelial neoplasm with imprecise borders, poorly delimited, non-encapsulated, growing in plaque-like formation from the superficial dermis into the adipose tissue, perineural invasion, without epidermal infiltration. DISCUSSION: It is an extremely rare malignant tumour, appearing as a solitary papule or plaque affecting the central face, that often affect middle-aged caucasic, female patients. Usual local aggressive nature, characterized by small nests and strands of cells in deep dermis and perineural-invasion images, absent in superficial tissue. An incisional biopsy is need to make a correct diagnosis. Due to its rarity there is no consensus on the best management and follow-up. The microcystic adnexal carcinoma should be taken into consideration in the differential diagnosis. Key words:Microcystic adnexal carcinoma, lip, histopathology.
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Oral verruciform xanthomas mimicking potentially malignant disorders
(Medicina Oral S.L, 2024) Preto, Kaique-Alberto; Lopes-Santos, Gabriela; Zanda, Marcelo-Junior; Oliveira, Denise-Tostes
Verruciform xanthoma represents a reactive lesion, common in the skin and somewhat rare in the mouth. Cases description: Two cases of verrucous white plaques, located on the tongue and the floor of mouth of different 30-years-old man and woman and clinically diagnosed as leukoplakia, are described. The histopathological analyses confirmed the diagnosis of oral verruciform xanthomas for both lesions. Practical implications: Despite of uncommon in the oral cavity, the verruciform xanthoma, particularly when affecting regions with a higher risk of developing oral cancer, should be included in differential diagnosis of oral potentially malignant disorders. The histopathological analysis remains as "gold standard technique" for a more accurate diagnosis of oral verruciform xanthoma. Key words:Foam cells, Verruciform xanthoma, Leukoplakia, Tongue.
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Update on chelating agents in endodontic treatment: A systematic review
(Medicina Oral S.L, 2024) Fortea, Laura; Sanz-Serrano, Diana; Luz, Luciana-Batista; Bardini, Giulia; Mercade, Montse
BACKGROUND: The aim of this review was to assess the evidence regarding the most commonly used chelating agents in terms of efficacy, erosive potential, cytotoxicity, interaction, antimicrobial effect, impact on sealers adhesion, and release of growth factors. MATERIAL AND METHODS: MEDLINE (PubMed) database, Cochrane Library and Scopus were searched up to January 14, 2023, including studies with one or more of the following chelating agents: 17% EDTA, 9% and 18% HEDP, 10% and 20% citric acid, 2%-2.25% peracetic acid and 7% maleic acid. In addition, the reference lists of all selected articles were also checked to identify additional relevant studies. Articles published in English and available in full-text were selected. The quality of studies was assessed using the modified CONSORT checklist guide and the Cochrane Collaboration tool. RESULTS: The electronic search yielded 538 citations, 56 of which were included. The articles included had moderate and low evidence values. Among 56 articles included, 55 were in vitro studies and one was a randomized clinical trial. Among the in vitro studies, 15 evaluated efficacy and dentin erosion, 12 evaluated interaction with other endodontic irrigants, 9 tested antimicrobial effect, 4 evaluated cytotoxicity in hamster and rat lung cells, 9 evaluated intervention in adhesion of filling materials and 8 focused on release of growth factors and on behavior of stem cells in regenerative endodontic. The RCT tested antimicrobial effect. CONCLUSIONS: 17% EDTA is the most effective in smear layer removal and in releasing growth factors on regenerative endodontics. However, the current incorporation of 9% and 18% etidronic acid has shown optimal results due to its compatibility with sodium hypochlorite and its capability on avoiding smear layer formation through a continuous chelation action. Despite these preliminary findings, methodological standardization between studies is required and in vivo studies are necessary to confirm in vitro studies. Key words:Chelating Agents, Smear Layer, Systematic Review, Endodontics, Root Canal Irrigants.
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Chemotherapy increases the prevalence of radiotherapy-related trismus in head and neck cancer patients: A systematic review and meta-analysis
(Medicina Oral S.L, 2024) Borges, Marcela-Maria-Fontes; Malta, Cássia-Emanuella-Nóbrega; Ribeiro, Reverton-Soares; Cetira-Filho, Edson-Luiz; de Moura, José-Fernando-Bastos; Rebouças, Lievin-Matos; Costa, Fábio-Wildson-Gurgel; Silva, Paulo-Goberlânio-de Barros; Mota, Mario-Rogerio-Lima
BACKGROUND: To evaluate the influence of chemotherapy on the prevalence of trismus in irradiated head and neck cancer patients. MATERIAL AND METHODS: This systematic review guided by PRISMA-2020 and registered in PROSPERO (CRD42021255377) screened 963 articles in 7 scientific-databases (PubMed, Lilacs, Livivo, Scopus, Embase, Web of Science, EBSCO) and 3 grey-literature databases (Open Grey, Google Scholar, ProQuest) and eight articles were included for qualitative synthesis, meta-analysis (combined odds ratio, inverse variance method plus random effects), heterogeneity analysis (I² and Tau²), one-of-out evaluation and publication bias analysis (Eggs' and Begg's tests) (RevMan®, p<0.05). The Newcastle-Ottawa Quality Assessment Scale Cohort Studies was used to assess the risk of bias (RoB). The classification assessment, development, and recommendations (GRADE) approach was used to assess the certainty of evidence. RESULTS: The eight articles evaluated 1474 patients treated with chemoradiotherapy and 858 patients treated with radiotherapy. Five articles had low RoB, and three had high RoB. Chemoradiotherapy significantly (p=0.0003) increased the prevalence of trismus (OR=2.55, 95% CI = 1.53-4.23) compared to radiotherapy, with significant (p=0.010) but low heterogeneity (I²=59%;Tau²=0.29). There was no significant risk of publication bias, one-out analysis showed no significant difference between studies, and GRADE showed a moderate level of evidence. Trismus was directly associated to worse quality of life. CONCLUSIONS: The incidence of trismus increases when chemotherapy is combined with radiotherapy for head and neck cancer, which negatively impacts the quality of life. Key words:Radiotherapy, Chemoradiotherapy, Head and Neck Neoplasms, Trismus, Quality of Life.
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Trueness of vat-photopolymerization printing technology of interim fixed partial denture with different building orientation: A Microcomputed tomography study
(Medicina Oral S.L, 2024) Radwan, Mohamed; Abdou, Ahmed; Tawfik, Ahmed; Bills, Paul; Blunt, Liam; Kusumasari, Citra; Mahrous, Aliaa
BACKGROUND: The aim was to assess the consequence of different printing orientation on the marginal misfit and internal gap of 3-unit interim fixed partial denture manufactured by two different additive manufacturing technologies compared to milling technique. MATERIAL AND METHODS: Three-unit interim fixed partial denture (FPD) was designed by using exocad software (Dental CAD 3.0 Galway) in the format of standard tessellation language (STL) , which was transferred to a nesting software (PreForm) and printed by A Next Dent C&B resin liquid (NextDent; Soesterberg, Neitherland) by using two printing technologies; stereolithography (SLA, n=30) and digital light processing (DLP, n=30) with 3 different orientations (occlusal direction [0°] ,buccal direction [90°] & lingual direction [270°]) for each technology (n=10). Additionally, a control group was milled (CAD/Milling, n=10) from DC PMMA A1 Disc (White peaks dental solutions; Gmbh& co., Germany). A Microcomputed tomography was used to measure the marginal misfit and internal gap for each specimen in 12 different points. The average value of the marginal and internal gaps measurements was calculated, and one-way ANOVA was used for the comparison between groups. RESULTS: SLA printing technology showed a similar result to CAD/Milling with all different printing orientations tested. DLP printing technology showed the highest gap values within all the printing orientations with significant difference (p< 0.001) with the CAD/Milling and SLA. CONCLUSIONS: Regarding the trueness of the interim FPDs, SLA was a promising technology for its superior adaptation. Marginal misfit and Internal gap for DLP printing technology limiting the use of that technology as it exceeded the acceptable clinical range. Key words:3D Printing, Microcomputed topography, Marginal Gap, Internal Misfit.
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Effect of the β-tricalcium phosphate particle on dental enamel associated with 10% carbamide peroxide bleaching
(Medicina Oral S.L, 2024) Lopes, Marina-Paparotto; Gonçalves, Iana-Maria-Costa; da Silva, Julliana-Andrade; Sobral-Souza, Danielle-Ferreira; Aguiar, Flávio-Henrique-Baggio; Lima, Débora-Alves-Nunes-Leite
BACKGROUND: Since bleaching gels can cause adverse effects on tooth enamel, it is important to evaluate new remineralizing agents on the market and their effects. MATERIAL AND METHODS: Seventy-five bovine enamel/dentin blocks (4x4x3mm) were randomly divided into six groups (n=10): Negative Control (NC) with no bleaching treatment or brushing; 10 CP (Carbamide Peroxide) (no brushing - Whiteness Perfect FGM); CT12 + 10 CP (Colgate Total® 12); ES + 10 CP (Elmex® Sensitive); BPC + 10 CP (Bianco® ProClinical); CMP + 10 CP (Colgate® Máxima Proteção Anticáries). The color was evaluated by reflectance spectrophotometry (∆E*ab, ∆E00, and ∆WID) at times T1 (baseline), T2 (24 hours after brushing), and T3 (24 hours after bleaching). Knoop microhardness (KHN) analysis were performed at T3. The enamel surface was qualitatively analyzed by Scanning Electron Microscopy (SEM). The data were analyzed using generalized linear models through descriptive and exploratory analyses, and a significance level of 5% was considered. RESULTS: Significant differences were observed when the bleached groups were compared to the NC group for ∆E*ab, ∆E00, and ∆WID at time T3 (p= 0.05). KHN did not differ significantly among the six groups (p=0.7585). CONCLUSIONS: Toothpastes with tricalcium phosphate (β-TCP) do not intervene with the efficacy of bleaching treatment with 10% carbamide peroxide. Although a slight mineral deposition on enamel surface can be observed on SEM images, KHN was not significantly altered, and the polishing of the samples were maintained. Key words:Dental Bleaching, Carbamide Peroxide, Hydrogen Peroxide, Dental Enamel, Tricalcium Phosphate.
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A comparison of the upper anterior teeth movements with optimized and conventional attachment
(Medicina Oral S.L, 2024) Hassanaly, Tahara; Rabal-Solans, Ana; Mediero-Pérez, María-Carmen; Nieto-Sánchez, Iván
BACKGROUND: Invisalign® attachments are divided into two main groups: the conventional group and the optimized group, which is also known as the SmartForce™. The aim of this study is to compare the movements produced by an optimized crescent-shaped attachment in superior incisor teeth with the movements produced by a conventional rectangular attachment (vertical and horizontal) in the same teeth. MATERIAL AND METHODS: This retrospective study examined the movement table of the initial ClinCheck® and the first refinement of 95 patients (mean age 44.18 ± 4.125, 40 males and 55 females). It represented 147 upper incisors divided into two groups: 87 with rectangular attachment and 60 with optimized attachment. Applying Kravitz's accuracy formula for each movement and each tooth of interest (with attachments of interest), we underlined the effectiveness of each attachment. Mann-Whitney U test, Kruskal-Wallis test, and Pearson and Spearman correlation coefficients were used for statistical analysis. RESULTS: The accuracies of rotation, mesio-distal angulation and vestibulo-lingual inclination are highly significantly related to the type of attachment used on the upper lateral incisor. The optimized attachment presented greater accuracy in the rotation of the lateral incisors than the conventional attachment. However, conventional vertical attachment showed a higher accuracy (p<.01) in the mesio-distal angulation and horizontal attachments showed a higher accuracy (p<.01) in the vestibulo-lingual inclination in the same group of teeth. CONCLUSIONS: Optimized attachments rotate better lateral incisors; conventional vertical attachments are more efficient to improve mesio-distal angulation; and horizontal attachments serve best for torque movements. Key words:Orthodontics, clear aligners, orthodontic tooth movements, attachments.
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Accuracy of the London Atlas to estimate the age of legal majority in a sample of the Amazon Regio
(Medicina Oral S.L, 2024) Afonso, Flávia; Moreira, Debora; Boedi, Rizky; Goetten, Izabella; Lourenço-Junior, Ernesto; Sartori, Vanessa; de Carli, João-Paulo; Franco, Ademir
BACKGROUND: Estimating the age of majority is a challenging task in forensic odontology, especially because the third molars are usually the only developing teeth between the ages of 16 and 21 years. The London Atlas emerged as an alternative to estimate age using dental development, eruption and deciduous root resorption as parameters. The method has performed well in young age categories, while its performance for age estimation via third molars has been disputed. The present study tested the performance of the London Atlas to estimate the age of legal majority in a sample of individuals from the Amazon Region. MATERIAL AND METHODS: The sample consisted of 1.256 panoramic radiographs of women (n = 694) and men (n = 562) between 16 and 22.9 years. The method was applied to the maxillary (#28) and mandibular (#38) left third molars. For comparative purposes, the sample was divided into seven age groups: 16├ 16.99; 17├ 17.99; 18├ 18.99; 19├ 19.99; 20├ 20.99; 21├ 21.99; and 22├ 22.99 years. Chronological and estimated ages were compared descriptively by means of mean absolute errors (MAE) and root mean squared errors (RMSE), as well as through Receiver Operating Characteristic (ROC) curves and their area under the curve (AUC). RESULTS: The MAE of the age estimates using tooth #28 was 1.76 years for females and 1.52 years for males. When the tooth #38 was used, the MAE for the females and males were 1.68 and 1.51 years, respectively. The MAE and RMSE increased in ascending order between age categories. Tooth #28 led to 74% of correct classifications around the age of legal majority, while tooth #38 reached 77%. The area under the curve was 0.75 for tooth #28 and 0.73 for tooth #38. CONCLUSIONS: The London Atlas should be used carefully to estimate the age of legal majority and not as a single method when the age threshold is 18 years. Key words:Age determination by teeth, forensic dentistry, forensic science, third molar.
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Factors associated with the impact of fixed appliance orthodontic treatment on the oral health-related quality of life of adolescents: Assessment using a condition-specific instrument
(Medicina Oral S.L, 2024) Corradi-Dias, Larissa; Paiva, Saul-Martins; de Arruda, José-Alcides-Almeida; Souza, Gabriela-Luiza-Nunes; Nakagawa, Rodrigo-Keigo; Drummond, Alexandre-Fortes; de Menezes, Leonardo-Foresti-Soares; Abreu, Lucas-Guimarães
BACKGROUND: Oral outcomes may have an impact on quality of life. The aim of this study was to assess factors associated with the impact of fixed appliance orthodontic treatment on the oral health-related quality of life (OHRQoL) of adolescents. MATERIAL AND METHODS: Individuals aged 10 to 18 years undergoing orthodontic treatment were included. Data regarding adolescents' sex and age, parental schooling, family income, and number of individuals who depend on income were collected. Clinical variables, orthodontic tooth extraction and malocclusion severity were also analyzed. OHRQoL was assessed with a questionnaire with items distributed across nine domains: aesthetics, functional limitation, diet, hygiene, maintenance, physical impact, social impact, time constraints, and transport/cost inconveniences. The higher the score, the more negative the adolescent's perception of his/her OHRQoL. Statistical analysis was performed. RESULTS: Seventy-five adolescents participated. Individuals aged ≤12 years had a more negative perception of the diet domain (p=0.026). Individuals whose parents/guardians had ≥8 years of schooling had a more negative perception of the impact on the hygiene domain (p<0.024). Individuals whose families had an income of ≤2 salaries had a more negative perception of the maintenance domain (p=0.016). Girls had a more negative perception of the physical impact domain (p<0.018). Girls (p=0.011), adolescents whose families had an income of ≤2 salaries (p=0.003), and adolescents who had severe malocclusion (p=0.026) had a more negative perception of the transport/cost inconveniences domain. Girls had a significantly higher overall score in response to the questionnaire than boys (p=0.041). CONCLUSIONS: Adolescents' sex, age, and malocclusion as well as parental education and family income were associated with the impact of orthodontic treatment on adolescents' OHRQoL. Key words:Adolescent, Quality of life, Orthodontic treatment, Fixed appliance.
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Accuracy of the third molar maturity index (I3M) for diagnosing the legal majority of young southern Brazilians
(Medicina Oral S.L, 2024) Sartori, Vanessa-Koltermann; Júnior, Ademir-Franco-do Rosário; Corazza, Pedro-Henrique; Bello, Yuri-Dall; Boedi, Rizky-Merdietio; Dallepiane, Felipe-Gomes; Dogenski, Letícia-Copatti; Linden, Maria-Salete-Sandini; Trentin, Micheline-Sandini; De Carli, João-Paulo
BACKGROUND: The numerous techniques for identifying adulthood require research testing the accuracy of each method in different populations. This study verified the accuracy of the third molar maturity index (I3M) proposed by Cameriere et al. (2008) for diagnosing the age of majority in a southern Brazilian population sample. MATERIAL AND METHODS: Panoramic radiographs of patients with dental element 38 treated at the School of Dentistry of the University of Passo Fundo (UPF), RS, Brazil, were analyzed. The patients were separated into age groups between 15.00 and 22.99 years. The Cameriere (2008) method was applied to each radiograph. The study sample comprised 671 individuals, with 385 women (mean age 19.67 ± 2.05) and 286 men (mean age 19.5 ± 2.11). RESULTS: The original cut-off value of I3M≤0.08 classified individuals younger and older than 18 years. ROC curve plotting resulted in an overall accuracy of 0.69 and 0.84 for women and men, respectively. The most favorable cut-off value for southern Brazilian men was 0.06, and women showed better results with an I3M adjusted to 0.13. The new cut-off values produced an accuracy of 0.78 for women and 0.84 for men. The original cut-off point to the I3M (0.08) was not the most appropriate for the studied sample. CONCLUSIONS: Thus, index adjustments to 0.13 for women and 0.06 for men may improve method performance among southern Brazilian individuals. Key words:Molar, third, radiography, panoramic, forensic dentistry, age groups, imputability.