Introduction: In clinical practice, submerged roots are found with high frequency, and their presence can change the planning of dental movements and implant placement. Objectives: To provide explanations of possible developments in the... more
Introduction: In clinical practice, submerged roots are found with high frequency, and their presence can change the planning of dental movements and implant placement. Objectives: To provide explanations of possible developments in the area involved, according to the evolutionary stage of the process, at the time of diagnosis. Discussion: After atrophy of the periodontal ligament and epithelial remnants of Malassez, ankylosis of the bone with the submerged root occurs, and initiates a process of replacement resorption. Until this process reaches the most advanced stage, this area represents an increased “bone” density, and if some care is not taken, this can generate resorption problems in the tooth to be moved. Whereas implants can be placed, despite the presence of the submerged root, irrespective of the stage of evolution. Conclusion: It is natural for the onset of alveolodental ankylosis and tooth replacement resorption to occur in submerged roots, and its stage of evolution wi...
The gubernacular cord is an original structure of the dental lamina, which undergoes apoptosis and their remnants were organized in the form of epithelial islets and strands that lined up, leaving the reduced epithelium of the enamel... more
The gubernacular cord is an original structure of the dental lamina, which undergoes apoptosis and their remnants were organized in the form of epithelial islets and strands that lined up, leaving the reduced epithelium of the enamel organ towards the oral mucosa. This structure is located within the gubernacular canal, which can be identified as a small opening in the alveolar region of the lingual or palatal surface of the deciduous teeth. Objective:To conceptualize, identify and assess the possible contribution of the gubernacular cord and canal in the process of tooth eruption. Literature review: A review of literature on Pubmed, Medline and Bireme databases, without datum restriction. Little amount of scientific articles were found, and only 14 studies were identified. The authors addressed the matter succinctly, with little information about these structures, which can play an important role in the process of tooth eruption. Conclusion: The gubernacular cord and canal are anat...
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Justification: Canines represent corners in the dental arch, and are important features in facial esthetics, as they support the upper lip, wing of the nose, and influence the nasolabial fold and the appearance of facial aging. In the... more
Justification: Canines represent corners in the dental arch, and are important features in facial esthetics, as they support the upper lip, wing of the nose, and influence the nasolabial fold and the appearance of facial aging. In the laterality movements, the canines guidance coordinate the opening and closing of the teeth, saving the TMJ from sudden movements. Discussion: As a result of the lack of eruption or the inadequate positioning of the maxillary canine, the loss of the laterality guide may occur, which will then occur in the maxillary lateral incisor, inducing lesions of “occlusal trauma”, such as inflammatory root resorption. Likewise, without well positioned canines, there may be premature aging and change in facial esthetics. Conclusion: In order to avoid problems with eruption and positioning of the maxillary canines, early diagnosis is made by analyzing their position and their relationship with the other teeth, and in the three-dimensional context of the maxilla, bet...
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A 10-year-old boy, affected by cleft lip and palate and the Ectrodactyly-Ectodermal Dysplasia-Clefting (EEC) syndrome, presented with hypodontia, microdontia, enamel hypoplasia and caries, as well as white macules and plaques on the... more
A 10-year-old boy, affected by cleft lip and palate and the Ectrodactyly-Ectodermal Dysplasia-Clefting (EEC) syndrome, presented with hypodontia, microdontia, enamel hypoplasia and caries, as well as white macules and plaques on the buccal mucosa bilaterally. Verrucous plaques were noted on the right side and a smooth diffuse white macule was present on the left side. Samples of each were taken by incisional biopsy. Microscopic analysis revealed oral mucosa comprised of hyperplastic stratified squamous epithelium with either hyperparakeratosis or lack of keratinization. There was extensive hydropic degeneration and sparse cells with perinuclear eosinophilic condensation were identified. The underlying fibrous connective tissue exhibited blood vessels with mild subepithelial mononuclear inflammatory infiltrate, bundles of skeletal striated muscle fibers, and areas of hemorrhage at deeper regions. White sponge nevus was diagnosed. To our knowledge, no other case of white sponge nevus has been reported in a patient with EEC syndrome. Considering the low prevalence of this disorder and also of the EEC syndrome, future studies on the etiology of the white sponge nevus might look at the common etiopathogenic aspects of both the white sponge nevus and the EEC syndrome.
Research Interests: Pathology, Cleft Palate, Medicine, Humans, Child, and 5 moreMale, Mouth mucosa, Cleft Lip, Syndrome, and Ectodermal Dysplasia
HOW THE CERVICAL REGION OF THE TOOTH IS STRUCTURED AND ORGANIZED On the surface of cervical region of human teeth, in the area where the enamel borders the cementum, there is a line known as the cementoenamel junction (CEJ) (Fig 1). On... more
HOW THE CERVICAL REGION OF THE TOOTH IS STRUCTURED AND ORGANIZED On the surface of cervical region of human teeth, in the area where the enamel borders the cementum, there is a line known as the cementoenamel junction (CEJ) (Fig 1). On the circumference of the neck of all human teeth the CEJ line alternates three types of relationship between enamel and cementum.3,7 In some areas of CEJ the cementum covers the enamel (Fig 4), in others the enamel and cementum meet edge to edge, but in other regions the enamel and cementum remain distant from each other, thereby exposing microscopic dentin gaps or “windows” facing the gingival connective tissue.
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At the conclusion of clinical orthodontic treat-ments, patients very often ask about the need or possibility of tooth whitening. During treatment, patients sometimes ask about the use of tooth-pastes or mouthwashes with whitening... more
At the conclusion of clinical orthodontic treat-ments, patients very often ask about the need or possibility of tooth whitening. During treatment, patients sometimes ask about the use of tooth-pastes or mouthwashes with whitening products. In several situations, they may ask direct ques-tions, such as: » Is bleaching good or bad for my health? » Does it cause cancer? » Are you in favor or against it?We discuss tooth whitening in this article as a way to help orthodontists to define indications and establish guidelines for their patients.Since the old Egyptian civilization, human be-ings have expressed their desire to have bright, white teeth.
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What causes repair or regeneration? What determines whether the lesion or destroyed area will suffer repair or regeneration is not if the final result was good or bad, but the type of damaged tissue. The connective tissues are the only... more
What causes repair or regeneration? What determines whether the lesion or destroyed area will suffer repair or regeneration is not if the final result was good or bad, but the type of damaged tissue. The connective tissues are the only ones vascularized and therefore are the only ones that have inflammation as a defense mechanism and of tissue reconstruction. The connective tissues are fibrous tissues, sort of dense, osseous, cartilaginous, adipose and others. The connective tissues when inflamed —or when blood coagulates inside as in surgery and trauma — immediately forms a fibrin network invaded by sprouts of endothelial cells that appear on the walls of blood vessels surrounding the damaged area and form a rich vessels net newly formed from this fibrinous reticular matrix. Angiogenesis — as this phenomenon of neovascularization is known — is one of the essential phenomena of tissue repair. Among the dental tissues the periodontal ligament tissue and pulp are classic connective ti...
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Introduction: Teeth frequently fail to erupt and situations arise that prevent the canines from reaching the occlusal plane. Objective: Discourse about the three situations in which the canine does not reach the occlusal plane, and... more
Introduction: Teeth frequently fail to erupt and situations arise that prevent the canines from reaching the occlusal plane. Objective: Discourse about the three situations in which the canine does not reach the occlusal plane, and remains unerupted; and at the same time, point how to make a safe diagnosis of alveolodental ankylosis - one of the three causes -, based on tomography. Conclusions: Ankylosis occurs in impacted teeth by atrophy of the periodontal ligament, including the epithelial rests of Malassez. The tomographic signs of alveolodental ankylosis in unerupted canines are the interruption of hypodense periodontal space, discontinuity of the lamina dura and its continuity with the root surface, which gradually loses its regular shape.
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Contact address: Alberto Consolaro E-mail: consolaro@uol.com.br There was a time, before the 80s, when the orthodontist would perform tooth movement as well as malocclusion and esthetic correction only in young patients with all teeth,... more
Contact address: Alberto Consolaro E-mail: consolaro@uol.com.br There was a time, before the 80s, when the orthodontist would perform tooth movement as well as malocclusion and esthetic correction only in young patients with all teeth, without prosthesis or implants, with completely healthy teeth and gingiva. In addition to responding to functional and esthetic needs of patients of all ages and with diferent oral and systemic health conditions, the orthodontist has currently supported and helped with other types of oral rehabilitation treatments which vary in complexity. During orthodontic planning, even before treatment onset, when patient’s expectations and projections are still being surveyed, patients tend to question the clinician about when and how is the best moment for dental bleaching. White healthy teeth are an individual as well as a social need. Clariications, guidelines and questions about the dental
Algumas lesões na mucosa bucal podem ser resultado da somatização do estresse psicossomático. Essas lesões devem ser reconhecidas, diagnosticadas, tratadas e os pacientes orientados sobre sua evolução e o prognóstico ao longo da vida,... more
Algumas lesões na mucosa bucal podem ser resultado da somatização do estresse psicossomático. Essas lesões devem ser reconhecidas, diagnosticadas, tratadas e os pacientes orientados sobre sua evolução e o prognóstico ao longo da vida, independentemente da especialidade que o clínico exerce, pois esses pacientes requerem todo tipo de abordagem odontológica. Depois de classificadas em três grupos distintos de lesões, apresenta-se os seus aspectos clínicos e conceituais na forma de atlas, para auxiliar no diagnóstico clínico diferencial e conduta por parte do profissional.
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The Leap protocol combines the newest and most active association of reciprocal-rotary instrumentation, aluminum insert ultrasonic, and diode laser. The reciprocal-rotary technique consists of Niti instruments used in different motions... more
The Leap protocol combines the newest and most active association of reciprocal-rotary instrumentation, aluminum insert ultrasonic, and diode laser. The reciprocal-rotary technique consists of Niti instruments used in different motions depending on the stage of the treatment and promotes the balanced cutting effectiveness and reduced risk of fracture files. Moreover, it creates a centered and tapered shape. The aluminum tip for the ultrasonic unit delivers agitation, emulsification, and cavitation of antiseptic solutions that improve the cleaning. The dye and laser use cause the ablation and final disinfection. This paper describes the case of a patient with asymptomatic apical periodontitis in an upper first right molar submitted to endodontic treatment performed with Leap protocol. After conventional procedures, the root canals were prepared by using reciprocal-rotary instrumentation techniques. Between each file a new solution was placed and activated with the ultrasonic handpiec...
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The starting point for the treatment of unerupted teeth should consider the fact that, biologically, the pericoronal follicle maintains the ability to release EGF and other mediators responsible for eruption over time. The eruptive events... more
The starting point for the treatment of unerupted teeth should consider the fact that, biologically, the pericoronal follicle maintains the ability to release EGF and other mediators responsible for eruption over time. The eruptive events may be guided and directed, so that teeth may occupy the space prepared to receive them in the dental arch, as showed in the case presented to evidence the following principle to be considered in these cases: “Regardless of the position of an unerupted tooth, it may be biologically directed to its place in the dental arch. The orthodontist should apply a mechanics to guide it and park it at its site.”
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The relationship between maxillary lateral incisor anodontia and the palatal displacement of unerupted maxillary canines cannot be considered as a multiple tooth abnormality with defined genetic etiology in order to be regarded as a... more
The relationship between maxillary lateral incisor anodontia and the palatal displacement of unerupted maxillary canines cannot be considered as a multiple tooth abnormality with defined genetic etiology in order to be regarded as a “syndrome”. Neither were the involved genes identified and located in the human genome, nor was it presumed on which chromosome the responsible gene would be located. The palatal maxillary canine displacement in cases of partial anodontia of the maxillary lateral incisor is potentially associated with environmental changes caused by its absence in its place of formation and eruption, which would characterize an epigenetic etiology. The lack of the maxillary lateral incisor in the canine region means removing one of the reference guides for the eruptive trajectory of the maxillary canine, which would therefore, not erupt and /or impact on the palate. Consequently, and in sequence, it would lead to malocclusion, maxillary atresia, transposition, prolonged ...
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The teeth become very close to each other when they are crowded, but their structures remain individualized and, in this situation, the role of the epithelial rests of Malassez is fundamental to release the EGF. The concept of tensegrity... more
The teeth become very close to each other when they are crowded, but their structures remain individualized and, in this situation, the role of the epithelial rests of Malassez is fundamental to release the EGF. The concept of tensegrity is fundamental to understand the responses of tissues submitted to forces in body movements, including teeth and their stability in this process. The factors of tooth position stability in the arch - or dental tensegrity - should be considered when one plans and perform an orthodontic treatment. The direct causes of the mandibular anterior crowding are decisive to decide about the correct retainer indication: Should they be applied and indicated throughout life? Should they really be permanently used for lifetime? These aspects of the mandibular anterior crowding and their implication at the orthodontic practice will be discussed here to induct reflections and insights for new researches, as well as advances in knowledge and technology on this subject.
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Objective: To evaluate topographic and temporal aspects of premaxillary bone and premaxillary-maxillary suture, since they are fundamental anatomical elements little explored clinically. Methods: 1,138 human dry skulls were evaluated, of... more
Objective: To evaluate topographic and temporal aspects of premaxillary bone and premaxillary-maxillary suture, since they are fundamental anatomical elements little explored clinically. Methods: 1,138 human dry skulls were evaluated, of which 116 (10.19%) of the specimens were children, and 1,022 (89.81%) were adults. The skulls were photographed and the percentage of premaxillary-maxillary suture opening was determined. Subsequently the data were tabulated and submitted to statistical analysis, adopting a level of significance of 5%. Results: The progression of premaxillary suture closure from birth to 12 years of age was 3.72% per year. In 100% of the skulls up to 12 years, the premaxillary-maxillary suture open in the palatal region was observed, while 6.16% of adults presented different degrees of opening. Conclusions: The premaxilla exists in an independent way within the maxillary complex and the presence of the premaxilla-maxillary suture justifies the success of anteroposte...
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This study contributes to the understanding of the mechanisms associated with signs and symptoms of tooth eruption, by investigating the presence of mast cells in pericoronal tissues during the intraosseous (Group 1) and submucosal (Group... more
This study contributes to the understanding of the mechanisms associated with signs and symptoms of tooth eruption, by investigating the presence of mast cells in pericoronal tissues during the intraosseous (Group 1) and submucosal (Group 2) phases of eruption. We compared findings for these two groups with each other and with those for the oral mucosa (Group 3). In each group, 14 specimens were analyzed microscopically after hematoxylin and eosin staining and immunohistochemical analysis of c-Kit and tryptase expression. Results revealed that the number and density of mast cells is different in follicular tissues according to the eruption phase, which may mean that: 1) masticatory trauma of the oral mucosa and dental follicles in the submucosa may explain why reduced enamel epithelium exposes enamel to the cells of the connective tissue; 2) exposure of antigenic enamel proteins might correspond to the release of sequestered antigens, which may lead to the interaction of IgE and a g...
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In order to lead to insights and discussion on proper use of Orthodontics and Pathology-related terminology, particularly in cases of smaller-than-usual maxilla and mandible - that is, anomalous ones -, this study compared the conceptual... more
In order to lead to insights and discussion on proper use of Orthodontics and Pathology-related terminology, particularly in cases of smaller-than-usual maxilla and mandible - that is, anomalous ones -, this study compared the conceptual meaning of the term “atresia.” It is considered improper when referring to maxilla and mandible with deficient growth compared to development that is satisfactory enough to reach normal size. To identify smaller maxilla and mandible, the most proper and accurate term is hypoplastic maxilla or mandible. This is because “atresia” stands for an anomaly related to lumen blockage in hollow organs, which is not the case for neither maxilla nor mandible. Hypoplastic maxilla or mandible can be properly and specifically referred to as micrognathia.
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The aim of the study was to evaluate canal preparation in primary molars with hand files, ProTaper Next and Self-Adjusting File (SAF) by 2D and 3D micro-computed tomography (micro-CT) analysis. Canals of 24 primary molars were prepared... more
The aim of the study was to evaluate canal preparation in primary molars with hand files, ProTaper Next and Self-Adjusting File (SAF) by 2D and 3D micro-computed tomography (micro-CT) analysis. Canals of 24 primary molars were prepared with hand files (HF), ProTaper Next (PTN) and SAF (n=8/group). The teeth were scanned before and after root canal preparation and the pre- and postoperative micro-CT images were reconstructed. Changes in 2D (area, perimeter, roundness, minor and major diameter) and 3D [volume, surface area, structure model index (SMI)] morphological parameters, as well as canal transportation and lateral perforations were evaluated (Kruskal-Wallis and ANOVA; a=0.05). SAF presented smaller changes in minor diameter, volume and surface area compared with HF and PTN (p<0.05). PTN presented more circular canals after preparation. 3D analysis revealed greater transportation in HF. PTN and SAF presented more centered canal preparation, especially in curved areas. SAF and...
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External apical root resorption as a consequence of orthodontic treatment is an inflammatory pathological process that results in permanent loss of tooth structure from the root apex. This study aimed to investigate the diagnostic... more
External apical root resorption as a consequence of orthodontic treatment is an inflammatory pathological process that results in permanent loss of tooth structure from the root apex. This study aimed to investigate the diagnostic potential of human dentine fractions and salivary IgG in external apical root resorption. Saliva samples were collected from 10 patients before (T0) and after 3 (T3), 6 (T6) and 12 (T12) months of orthodontic treatment. The total dentinal extract, obtained from human third molars, was fractioned by gel filtration chromatography in three fractions denominated FI, FII and FIII. The root resorption analysis of the upper central incisors was performed by digital image subtraction method. Reactivity of salivary IgG to antigenic fractions of dentine was determined by enzyme-linked immunosorbent assay (Elisa). Regardless of treatment, FI dentin fraction with high MM (<300kDa) was the one that presented highest reactivity with salivary IgG. However, it was foun...
Research Interests: Chemistry, Dentistry, Orthodontics, Medicine, Root Resorption, and 3 moreSaliva, Resorption, and Molar
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The aim of this study was to evaluate bone mineral density (BMD) and microarchitecture in femurs and maxillary bones of ovariectomized (OVX) rats treated or not treated with alendronate (ALD) or odanacatib (ODN). Twenty rats were divided... more
The aim of this study was to evaluate bone mineral density (BMD) and microarchitecture in femurs and maxillary bones of ovariectomized (OVX) rats treated or not treated with alendronate (ALD) or odanacatib (ODN). Twenty rats were divided into groups: SHAM, OVX, OVX/ALD, and OVX/ODN. After 12 weeks, the femurs and maxillae were removed and subjected to 3-dimensional analysis by micro-computed tomography. Results were analyzed with 1-way analysis of variance and Tukey's post hoc test (α = 0.05). OVX decreased maxillary and femoral BMD and altered femoral microarchitecture (P < .05). The drugs increased BMD of both types of bones, but only ALD maintained the phenotype similar to the SHAM group. The action of ALD was limited to the femoral trabecular separation (Tb.Sp). OVX and the drugs had no effect on the microarchitecture of the maxilla (P > .05). ALD and ODN therapy increased BMD in both bones after ovariectomy. ALD was more successful than ODN in preserving the morpholog...
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To compare the apical negative pressure irrigation (ANP) with conventional irrigation in the teeth of immature dogs with apical periodontitis. Fifty-two immature pre-molar root canals were randomly assigned into 4 groups: ANP (n=15);... more
To compare the apical negative pressure irrigation (ANP) with conventional irrigation in the teeth of immature dogs with apical periodontitis. Fifty-two immature pre-molar root canals were randomly assigned into 4 groups: ANP (n=15); conventional irrigation (n=17); healthy teeth (control) (n = 10); and teeth with untreated apical periodontitis (control) (n=10). After induction of apical periodontitis, teeth were instrumented using EndoVac® (apical negative pressure irrigation) or conventional irrigation. The animals were euthanized after 90 days. The sections were stained by HE and analyzed under conventional and fluorescence microscopy. TRAP histoenzymology was also performed. Statistical analyses were performed with the significance level set at 5%. There was difference in the histopathological parameters between ANP and conventional groups (p<0.05). The ANP group showed a predominance of low magnitude inflammatory infiltrate, a smaller periodontal ligament, and lower mineraliz...
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Obesity is a wide-spread condition directly or indirectly connected with an increase in the prevalence of a variety of human diseases. It affects over 50% of the western overall population. In 2017, a thorough analysis of 204 studies on... more
Obesity is a wide-spread condition directly or indirectly connected with an increase in the prevalence of a variety of human diseases. It affects over 50% of the western overall population. In 2017, a thorough analysis of 204 studies on obesity and cancer revealed that the condition increases the risk of the following types of cancer: stomach, colon, rectal, bile duct, pancreatic, esophagus, breast, endometrial, ovarian, kidney and multiple myeloma. The first study aiming at establishing a connection between obesity and the rate of induced orthodontic tooth movement was conducted by Saloom et al; however, it could not effectively nor significantly reveal any direct influence or effect. Despite being identified during the first week, differences could not be explained and treatment time remained unchanged. In spite of lack of studies in the literature on the connection between obesity and the rate of induced tooth movement, in clinical practice, courses or specialized training, we sh...
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Premaxilla, in its early descriptions, had the participation of Goethe. In our face, in a certain period of growth and development processes, premaxilla is an independent and, then, a semi-independent bone to finally be totally integrated... more
Premaxilla, in its early descriptions, had the participation of Goethe. In our face, in a certain period of growth and development processes, premaxilla is an independent and, then, a semi-independent bone to finally be totally integrated to the maxilla. Formation of the premaxilla acts as a stabilization element inside the facial skeleton comparable to the cornerstone of a Roman arch and is closely related to the development of human face and its abnormal growth with characteristic malformations. Until when the premaxillary-maxillary suture remains open and offers opportunities to orthopedically influence facial growth to exert influence over facial esthetics and function? Contact with preliminary results in 1183 skulls from anatomic museums at USP, Unicamp and Unifesp led us to question therapeutic perspectives and its clinical applicability.
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The aim of this study was to evaluate the tissue compatibility of a silorane-based resin system (FiltekTM Silorane) and a methacrylate-based nanoparticle resin (FiltekTM Supreme XT) after implantation in the subcutaneous connective tissue... more
The aim of this study was to evaluate the tissue compatibility of a silorane-based resin system (FiltekTM Silorane) and a methacrylate-based nanoparticle resin (FiltekTM Supreme XT) after implantation in the subcutaneous connective tissue of isogenic mice. One hundred and thirty five male isogenic BALB/c mice were randomly assigned to 12 experimental and 3 control groups, according to the implanted material and the experimental period of 7, 21 and 63 days. At the end of each period, the animals were killed and the tubes with the surrounding tissues were removed and processed for microscopic analysis. Samples were subjected to a descriptive and a semi-quantitative analyses using a 4-point scoring system (0-3) to evaluate the collagen fiber formation and inflammatory infiltrate. Data were statistically analyzed using the Kruskal Wallis test (?=0.05). The results showed that there was no significant difference between the experimental and control groups considering the three evaluation...
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A Citotoxicidade de quatro cimentos obturadores à base de hidróxido de cálcio (Sealapex, CRCS, Apexit e Sealer26) e um cimento à base de óxido de zinco e eugenol (Fill Canal) foi avaliada em cultura de macrófagos retirado de peritônio de... more
A Citotoxicidade de quatro cimentos obturadores à base de hidróxido de cálcio (Sealapex, CRCS, Apexit e Sealer26) e um cimento à base de óxido de zinco e eugenol (Fill Canal) foi avaliada em cultura de macrófagos retirado de peritônio de rato para liberação de peróxido de hidrogênio. A menor citotoxicidade foi para o cimento CRCS, seguida em ordem crescente de citotoxicidade pelo Sealapex, Apexit, Fill Canall e Sealer 26.
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This study evaluated microscopically the dental pulp reactions in human premolars prepared for metaloceramic crowns cemented with different luting agents and also measured the remaining dentin thickness (RDT) of the prepared teeth.... more
This study evaluated microscopically the dental pulp reactions in human premolars prepared for metaloceramic crowns cemented with different luting agents and also measured the remaining dentin thickness (RDT) of the prepared teeth. Twenty-five teeth were selected from patients that needed exodontia for orthodontic reasons and were randomly divided in three groups: group 1- five teeth were not prepared to serve as a positive control group; groups - 2, and 3 the teeth were prepared for metaloceramic crowns cemented with calcium-hydroxide cement (Life) and resin cement (Panavia Ex 21), respectively. After the final cementation, the teeth remaining in function for periods of seven and forty-five days and were extracted and prepared for microscopic analysis of pulp tissue and detection of presence of bacteria in the dentin tubules. The RDT were measured in 6 different regions of the prepared surface and presented a mean thickness ranging from 1.53 to 1.58 mm. The microscopic analysis did...
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Dentre os cimentos de hidróxido de cálcio presentes no mercado, o Sealapex® apresenta grande biocompatibilidade e selamento marginal apical, mas não possui a radiopacidade desejada, motivo pelo qual muitos profissionais passaram a agregar... more
Dentre os cimentos de hidróxido de cálcio presentes no mercado, o Sealapex® apresenta grande biocompatibilidade e selamento marginal apical, mas não possui a radiopacidade desejada, motivo pelo qual muitos profissionais passaram a agregar algumas substâncias Dentre os cimentos de hidróxido de cálcio presentes no mercado, o Sealapex® apresenta grande biocompatibilidade e selamento marginal apical, mas não possui a radiopacidade desejada, motivo pelo qual muitos profissionais passaram a agregar algumas substâncias radiopacas ao cimento. O propósito deste trabalho foi avaliar a resposta tecidual ao Sealapex® puro e acrescido de iodofórmio ou óxido de zinco, em tecido conjuntivo subcutâneo de ratos. Utilizaram-se trinta animais, nos quais os três materiais, no interior de tubos de polietileno, foram implantados. Após períodos de observação de 14 ou noventa dias, realizou-se o sacrifício e os espécimes foram encaminhados para preparação histológica de rotina. As respostas do tecido conju...
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The midpalatal suture has bone margins with thick connective tissue interposed between them, and it does not represent the fusion of maxillary palatal processes only, but also the fusion of palatal processes of the jaws and horizontal... more
The midpalatal suture has bone margins with thick connective tissue interposed between them, and it does not represent the fusion of maxillary palatal processes only, but also the fusion of palatal processes of the jaws and horizontal osseous laminae of palatal bones. Changing it implies affecting neighboring areas. It has got three segments that should be considered by all clinical analyses, whether therapeutic or experimental: the anterior segment (before the incisive foramen, or intermaxillary segment), the middle segment (from the incisive foramen to the suture transversal to the palatal bone ) and the posterior segment (after the suture transversal to the palatal bone ). Rapid palatal expansion might be recommended for patients at the final pubertal growth stage, in addition to adult patients with maxillary constriction. It represents a treatment solution that can potentially avoid surgical intervention. When performed in association with rapid palatal expanders, it might enhan...
Research Interests: Orthodontics and Medicine
Gingival recession has direct causes and predisposing factors. Orthodontic treatment is able to prevent recession and even contribute to its treatment, with or without periodontal approach, depending on the type and severity of gingival... more
Gingival recession has direct causes and predisposing factors. Orthodontic treatment is able to prevent recession and even contribute to its treatment, with or without periodontal approach, depending on the type and severity of gingival tissue damage. There is no evidence on the fact that orthodontic treatment alone might induce gingival recession, although it might lead the affected teeth (usually mandibular incisors or maxillary canines) to be involved in situations that act as predisposing factors, allowing direct causes to act and, therefore, trigger recession, especially when the buccal bone plate is very thin or presents with dehiscence. Several aspects regarding the relationship between orthodontic treatment and gingival recession have been addressed, and so has the importance of the periosteum to the mechanism of gingival recession formation. Clinical as well as experimental trials on the subject would help to clarify this matter, of which understanding is not very deep in t...