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1.
J Med Case Rep ; 17(1): 74, 2023 Mar 03.
Artigo em Inglês | MEDLINE | ID: mdl-36864491

RESUMO

BACKGROUND: Coronavirus disease 2019 makes patients more susceptible to superinfection of fungal disease as a consequence of immunological system impairment. Mucormycosis is a fungal infection that is rare but has a high mortality rate and mostly affects patients with poorly controlled diabetes mellitus or those receiving corticosteroids. CASE PRESENTATION: Here, we present a case of post-coronavirus disease 2019 mucormycosis in a 37-year-old Persian male presenting with multiple periodontal abscess with purulent discharge and necrosis of maxillary bone (without oroantral communication). Surgical debridement following antifungal therapy was the treatment of choice. CONCLUSION: Early diagnosis and immediate referral are the cornerstone of comprehensive treatment.


Assuntos
Mucormicose , Abscesso Periodontal , Síndrome Pós-COVID-19 Aguda , Adulto , Humanos , Masculino , Mucormicose/diagnóstico , Mucormicose/etiologia , Mucormicose/terapia , Abscesso Periodontal/diagnóstico , Abscesso Periodontal/etiologia , Abscesso Periodontal/terapia , Maxila/microbiologia , Maxila/cirurgia , Síndrome Pós-COVID-19 Aguda/complicações , Síndrome Pós-COVID-19 Aguda/diagnóstico , Desbridamento , Necrose , Antifúngicos/uso terapêutico
2.
Ear Nose Throat J ; 100(10_suppl): 1023S-1026S, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32538671

RESUMO

Medpor porous polyethylene implants are commonly used for facial skeletal reconstruction due to reported biocompatibility, fibrovascularization, and durability. While uncommon, late implant infections are an important consideration. We report delayed infections in 2 patients after unilateral total oncologic maxillectomy and reconstruction using Medpor implants for an ossifying fibroma and squamous cell carcinoma, respectively. In the first patient, annual interval computed tomography (CT) scans showed no recurrence of tumor or inflammatory changes. The second was lost to follow-up after adjuvant chemoradiation 1 year after resection. Patients both presented with swelling, drainage, and erythema around the implant at a mean of 4.5 years following maxillectomy. Both failed several attempts at conservative treatment. Cultures of implants removed at a mean of 2.5 months after infection grew α-hemolytic Streptococcus in the first and multiple organisms in the second, showing that the potential for delayed infection should be considered years after reconstruction.


Assuntos
Reconstrução Mandibular/efeitos adversos , Maxila/cirurgia , Prótese Maxilofacial/microbiologia , Infecções Relacionadas à Prótese/microbiologia , Infecções Estreptocócicas/microbiologia , Feminino , Humanos , Masculino , Reconstrução Mandibular/instrumentação , Maxila/microbiologia , Neoplasias do Seio Maxilar/cirurgia , Prótese Maxilofacial/efeitos adversos , Ilustração Médica , Pessoa de Meia-Idade , Neoplasias Palatinas/cirurgia , Polietilenos , Porosidade , Desenho de Prótese , Streptococcus
3.
BMC Infect Dis ; 20(1): 614, 2020 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-32811466

RESUMO

BACKGROUND: The most common aetiological agents of mucormycosis are Rhizopus, Mucor, Apophysomyces and Lichtheimia. Apophysomyces is comparatively rare, as it has been reported in less than 3% of mucormycosis cases. The genus Apophysomyces includes six species, and only A. elegans, A. mexicanus, A. variabilis and A. ossiformis have been reported to cause infections in both immunocompetent and immunocompromised patients. CASE PRESENTATION: We present a case of a 46-year-old male patient with bilateral blepharoedema, corneal opacity in the left eye and poorly controlled diabetes mellitus. The patient was subjected to total maxillectomy, exenteration of the left orbit and treatment with liposomal amphotericin B. Direct mycological analysis with KOH 10% revealed hyaline, coenocytic, long and wide hyphae. Apophysomyces ossiformis was identified from maxillary biopsy using 18S-ITS1-5.8S-ITS2-28S rRNA gene amplification and sequencing. The patient requested to be transferred to another hospital to continue treatment, where he died on the ninth day after admittance. CONCLUSION: To the best of our knowledge, this is the first case of rhino-orbital mucormycosis due to A. ossiformis with a fatal outcome. This case reveals the need to identify the fungus causing mucormycosis with molecular methods to identify adequate treatment therapies for patients with this infection.


Assuntos
Complicações do Diabetes/microbiologia , Mucorales/genética , Mucormicose/complicações , Doenças Orbitárias/complicações , Rinite/complicações , Anfotericina B/uso terapêutico , Antifúngicos/uso terapêutico , Biópsia , Complicações do Diabetes/tratamento farmacológico , Complicações do Diabetes/cirurgia , Evolução Fatal , Humanos , Hospedeiro Imunocomprometido , Masculino , Maxila/microbiologia , Maxila/patologia , Maxila/cirurgia , Pessoa de Meia-Idade , Mucormicose/tratamento farmacológico , Mucormicose/microbiologia , Mucormicose/cirurgia , Doenças Orbitárias/tratamento farmacológico , Doenças Orbitárias/microbiologia , Doenças Orbitárias/cirurgia , RNA Ribossômico 28S/genética , Rinite/tratamento farmacológico , Rinite/microbiologia , Rinite/cirurgia
4.
Pathol Int ; 69(6): 360-365, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31215141

RESUMO

A fungal ball of a maxillary sinus sometimes includes dental treatment-related foreign material because the sinus is close to the root of the upper teeth. We present a case of right maxillary sinus fungal ball with a gutta-percha point, a dental root canal filler. X-ray analysis of the foreign material in the paraffin section of the fungal ball successfully detected zinc, sulfur, and barium, all of which were constituents of the gutta-percha point. The gutta-percha point might have facilitated the formation of the fungal ball through disruption of the sinus-clearing mechanism. Another interesting histological feature of the fungal ball was the finding of calcium oxalate crystals and non-hyphal fungal elements such as cleistothecia, Hülle cells, and conidial heads. This is the first report of such a combination being found in a specimen of human fungal disease. Although fungal culture was not available in the present case, molecular analysis of the formalin-fixed paraffin-embedded tissue of the fungal ball succeeded in revealing only DNA sequences of Aspergillus nidulans and some other environmental Aspergillus spp.


Assuntos
Cavidade Pulpar/patologia , Maxila/patologia , Seio Maxilar/microbiologia , Seio Maxilar/patologia , Aspergillus nidulans/patogenicidade , Cavidade Pulpar/microbiologia , Proteínas Fúngicas/metabolismo , Guta-Percha , Humanos , Masculino , Maxila/microbiologia , Pessoa de Meia-Idade , Micoses/diagnóstico , Micoses/patologia , Dente/microbiologia , Dente/patologia
5.
PLoS Negl Trop Dis ; 12(3): e0006341, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29522533

RESUMO

BACKGROUND: Facial deformation as a sequela of leprosy is caused not only by a saddle nose but also by regression of the maxilla, as well documented in paleopathological observations of excavated skeletal remains of patients with leprosy. However, maxillary changes in living patients have been evaluated only by the subjective visual grading. Here, we attempted to evaluate maxillary bone deformation in patients with leprosy using three-dimensional computed tomography (3D-CT). METHODS: Three-dimensional images centered on the maxilla were reconstructed using multiplanar reconstruction methods in former patients with leprosy (n = 10) and control subjects (n = 5); the anterior-posterior length of the maxilla (MA-P) was then measured. The difference between the MA-P of the patients and those of controls was evaluated after compensating for individual skull size. These findings were also compared with those from previous paleopathological studies. FINDINGS: Three former patients with lepromatous leprosy showed marked atrophy of the maxilla at the prosthion (-8.6, -11.1 and -17.9 mm) which corresponded with the visual appearance of the maxillary deformity, and these results were consistent with paleopathological findings of excavated skeletal remains. Additionally, the precise bone defects of the maxilla could be individually calculated for accurate reconstructive surgery. INTERPRETATION: We have successfully illustrated maxillary bone deformities in living patients with leprosy. This study also confirmed the maxillary regression described in paleopathological studies.


Assuntos
Hanseníase Virchowiana/patologia , Maxila/diagnóstico por imagem , Maxila/patologia , Idoso , Idoso de 80 Anos ou mais , Atrofia , Anormalidades Congênitas/diagnóstico por imagem , Face , Feminino , Humanos , Imageamento Tridimensional , Hanseníase Virchowiana/complicações , Hanseníase Virchowiana/microbiologia , Masculino , Maxila/microbiologia , Nariz/diagnóstico por imagem , Paleopatologia , Crânio/diagnóstico por imagem , Tomografia Computadorizada por Raios X
6.
Georgian Med News ; (274): 152-158, 2018 Jan.
Artigo em Russo | MEDLINE | ID: mdl-29461245

RESUMO

This study investigates the morphological structure of lungs, liver and kidneys of the experimental animals. To reproduce the inflammation in maxilla-facial region under the periosteum of guinea pigs' mandible a suspension of S.aureus was inoculated. The infected site was exposed by a constant electric current of positive polarity of 5-10 µA strength. Allergotests were used to determine the level of sensitization. Structural changes in the organs were determined by microscopic examination. The results of the study showed that as the contact with the antigen increased, the number of positive allergic tests also increased. Histologically, a generalized damage to the microstructure of the internal organs, depending on the degree of bacterial sensitization of the animals was observed.


Assuntos
Rim/imunologia , Fígado/imunologia , Pulmão/imunologia , Maxila/imunologia , Infecções Estafilocócicas/imunologia , Staphylococcus aureus/imunologia , Alérgenos/farmacologia , Animais , Antígenos de Bactérias/farmacologia , Translocação Bacteriana/imunologia , Estimulação Elétrica , Cobaias , Imunização/métodos , Rim/microbiologia , Rim/patologia , Rim/ultraestrutura , Fígado/microbiologia , Fígado/patologia , Fígado/ultraestrutura , Pulmão/microbiologia , Pulmão/patologia , Pulmão/ultraestrutura , Masculino , Maxila/microbiologia , Maxila/patologia , Infecções Estafilocócicas/microbiologia , Infecções Estafilocócicas/patologia , Staphylococcus aureus/patogenicidade
7.
J Craniofac Surg ; 29(1): e44-e47, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28953151

RESUMO

OBJECTIVES: In the paranasal sinus fungal ball (SFB), changes that occur in the underlying bone have not been well described. Recently, bacterial coinfection has been reported in patients with paranasal SFB. We evaluated whether bone changes occur in patients with unilateral maxillary SFB, and also how bacteria in an SFB affect the bony wall of the sinus. METHODS: A retrospective study of patients with a unilateral maxillary SFB undergoing endoscopic sinus surgery was conducted from July 2009 to December 2015. Preoperative computed tomography images of the patients were reviewed. Wall thickness (WT) and wall density (WD) of the diseased sinus were measured and compared to the normal sinus. Specimens of the sinus aspirates were obtained during surgery for aerobic and anaerobic cultures. RESULTS: Forty-three patients were included (mean, 55.7 ±â€Š12.8 years). Thirty-one cultures (72.1%) were positive for bacteria. Thickening was evident in the anterior, lateral, and posterior walls of the diseased sinus. The average WT was 1.69 ±â€Š0.45 mm on the diseased sinus and 1.14 ±â€Š0.31 mm on the normal sinus (P < 0.001). In the diseased sinus, the difference in the average WT between the culture-positive and culture-negative groups was not significant (P = 0.44). The average WD on the diseased sinus was higher than that on the normal sinus (P < 0.001). CONCLUSIONS: Osteitic change occurred in most patients with a unilateral maxillary SFB. The presence of bacteria in sinus secretions does not greatly affect the development of osteitic changes in unilateral maxillary SFB.


Assuntos
Infecções Fúngicas Invasivas , Maxila , Seio Maxilar , Sinusite Maxilar , Adulto , Idoso , Feminino , Humanos , Infecções Fúngicas Invasivas/diagnóstico , Infecções Fúngicas Invasivas/microbiologia , Masculino , Maxila/diagnóstico por imagem , Maxila/microbiologia , Maxila/patologia , Seio Maxilar/microbiologia , Seio Maxilar/cirurgia , Sinusite Maxilar/diagnóstico , Sinusite Maxilar/microbiologia , Pessoa de Meia-Idade , Cirurgia Endoscópica por Orifício Natural/métodos , República da Coreia , Estudos Retrospectivos , Estatística como Assunto , Tomografia Computadorizada por Raios X/métodos
8.
Am J Orthod Dentofacial Orthop ; 150(3): 467-75, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27585775

RESUMO

INTRODUCTION: Our aims were to analyze adhesion of periodontopathogens to self-ligating brackets (Clarity-SL [CSL], Clippy-C [CC] and Damon Q [DQ]) and to identify the relationships between bacterial adhesion and oral hygiene indexes. METHODS: Central incisor brackets from the maxilla and mandible were collected from 60 patients at debonding after the plaque and gingival indexes were measured. Adhesions of Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Prevotella intermedia (Pi), Fusobacterium nucleatum (Fn), and Tannerella forsythia (Tf) were quantitatively determined using real-time polymerase chain reactions. Factorial analysis of variance was used to analyze bacterial adhesion in relation to bracket type and jaw position. Correlation coefficients were calculated to determine the relationships between bacterial adhesion and the oral hygiene indexes. RESULTS: Total bacteria showed greater adhesion to CSL than to DQ brackets, whereas Aa, Pg, and Pi adhered more to DQ than to CSL brackets. CC brackets showed an intermediate adhesion pattern between CSL and DQ brackets, but it did not differ significantly from either bracket type. Adhesion of Fn and Tf did not differ significantly among the 3 brackets. Most bacteria were detected in greater quantities in the mandibular than in the maxillary brackets. The plaque and gingival indexes were not strongly correlated with bacterial adhesion to the brackets. CONCLUSIONS: Because Aa, Pg, and Pi adhered more to the DQ brackets in the mandibular area, orthodontic patients with periodontal problems should be carefully monitored in the mandibular incisors where the distance between the bracket and the gingiva is small, especially when DQ brackets are used.


Assuntos
Aderência Bacteriana , Braquetes Ortodônticos/microbiologia , Periodonto/microbiologia , Adulto , Carga Bacteriana , Placa Dentária/microbiologia , Feminino , Humanos , Incisivo/microbiologia , Masculino , Mandíbula/microbiologia , Maxila/microbiologia , Índice de Higiene Oral , Estatística como Assunto
9.
Int J Oral Maxillofac Implants ; 31(2): 382-90, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27004284

RESUMO

PURPOSE: The aim of this study was to evaluate and compare the clinical and radiographic outcomes of single implants with a platform-switched rough collar (PSRC) and a platform-matched smooth collar (PMSC). MATERIALS AND METHODS: Twenty-six patients missing a tooth in the anterior maxilla (through the premolars) were randomly assigned to the PSRC or the PMSC group. All implants were placed in a flapless approach and restored with an early loading protocol. Clinical measurements were performed at surgery, loading, and at 3, 6, and 12 months after loading. In addition, radiographic evaluations were carried out using standardized periapical radiographs and cone beam computed tomography. Patient satisfaction surveys were completed, and microbial analysis with DNA probes was performed. RESULTS: The implant survival rate was 100% for both groups. The mean marginal bone level (MBL) was significantly higher in the PSRC group compared to the PMSC group at all time points. From the 2-week postoperative visit to 1 year postloading, the mean MBL change in the PSRC group was 0.21 ± 0.56 mm and in the PMSC group it was 0.74 ± 0.47 mm. Soft tissue profiles were stable over time, with no significant differences between groups. There were no significant differences between groups in the number of microbial species seen. Patients in both groups were highly satisfied with postoperative and postprosthetic experiences. CONCLUSION: In this study, the PSRC method preserved marginal bone by a mean of 0.53 mm more than the standard PMSC protocol. Within the limitations of the present study, it can be concluded that the PSRC protocol may be beneficial in marginal bone preservation. Longitudinal studies are needed to verify the long-term effects of this approach.


Assuntos
Projeto do Implante Dentário-Pivô , Implantes Dentários para Um Único Dente , Planejamento de Prótese Dentária , Adulto , Idoso , Idoso de 80 Anos ou mais , Processo Alveolar/diagnóstico por imagem , Processo Alveolar/microbiologia , Tomografia Computadorizada de Feixe Cônico/métodos , Coroas , Implantação Dentária Endóssea/métodos , Implantes Dentários para Um Único Dente/microbiologia , Prótese Dentária Fixada por Implante , Feminino , Seguimentos , Gengiva/diagnóstico por imagem , Gengiva/microbiologia , Humanos , Carga Imediata em Implante Dentário , Masculino , Maxila/diagnóstico por imagem , Maxila/microbiologia , Maxila/cirurgia , Pessoa de Meia-Idade , Satisfação do Paciente , Radiografia Interproximal/métodos , Propriedades de Superfície , Resultado do Tratamento
10.
Anaerobe ; 39: 91-6, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26996070

RESUMO

Rheumatoid arthritis (RA) and periodontitis (PD) are chronic inflammatory disorders that cause bone loss. PD tends to be more prevalent and severe in RA patients. Previous experimental studies demonstrated that RA triggers alveolar bone loss similarly to PD. The aim of this study was to investigate if arthritis-induced alveolar bone loss is associated with modification in the oral microbiota. Checkerboard DNA-DNA hybridization was employed to analyze forty oral bacterial species in 3 groups of C57BL/6 mice: control (n = 12; without any challenge); Y4 (n = 8; received oral inoculation of Aggregatibacter Actinomycetemcomitans strain FDC Y4) and AIA group (n = 12; chronic antigen-induced arthritis). The results showed that AIA and Y4 group exhibited similar patterns of bone loss. The AIA group exhibited higher counts of most bacterial species analyzed with predominance of Gram-negative species similarly to infection-induced PD. Prevotella nigrescens and Treponema denticola were detected only in the Y4 group whereas Campylobacter showae, Streptococcus mitis and Streptococcus oralis were only found in the AIA group. Counts of Parvimonas micra, Selenomonas Noxia and Veillonella parvula were greater in the AIA group whereas Actinomyces viscosus and Neisseira mucosa were in large proportion in Y4 group. In conclusion, AIA is associated with changes in the composition of the oral microbiota, which might account for the alveolar bone loss observed in AIA mice.


Assuntos
Perda do Osso Alveolar/microbiologia , Processo Alveolar/microbiologia , Artrite Experimental/microbiologia , Maxila/microbiologia , Microbiota/genética , Periodontite/microbiologia , Aggregatibacter actinomycetemcomitans/classificação , Aggregatibacter actinomycetemcomitans/genética , Aggregatibacter actinomycetemcomitans/isolamento & purificação , Perda do Osso Alveolar/patologia , Processo Alveolar/patologia , Animais , Artrite Experimental/patologia , Campylobacter/classificação , Campylobacter/genética , Campylobacter/isolamento & purificação , DNA Bacteriano/genética , Humanos , Masculino , Maxila/patologia , Camundongos , Camundongos Endogâmicos C57BL , Boca/microbiologia , Boca/patologia , Periodontite/patologia , Prevotella nigrescens/classificação , Prevotella nigrescens/genética , Prevotella nigrescens/isolamento & purificação , Streptococcus mitis/classificação , Streptococcus mitis/genética , Streptococcus mitis/isolamento & purificação , Streptococcus oralis/classificação , Streptococcus oralis/genética , Streptococcus oralis/isolamento & purificação , Treponema denticola/classificação , Treponema denticola/genética , Treponema denticola/isolamento & purificação
11.
Klin Khir ; (12): 54-7, 2016.
Artigo em Ucraniano | MEDLINE | ID: mdl-30272875

RESUMO

Own experience of treatment of a narcotic dependence patients, suffering osteomyelitis of jaws, was analyzed. In those patients, who have had exposed themselves towards toxic impact of narcotic substances (even after arrest of the consumption) for a long period of time, the inflammation spreading on the bones of facial middle zone and the skull base with occurrence of a life3threatening purulent3septic, including intracerebral, complications (cerebral аbscess, meningitis, sepsis) were observed. Additional division of cerebral abscess on open and closed forms for optimization of diagnosis of іntracranial complications was proposed.


Assuntos
Mandíbula/cirurgia , Maxila/cirurgia , Osteomielite/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Base do Crânio/cirurgia , Transtornos Relacionados ao Uso de Substâncias/cirurgia , Adulto , Antibacterianos/uso terapêutico , Abscesso Encefálico/etiologia , Abscesso Encefálico/microbiologia , Abscesso Encefálico/patologia , Abscesso Encefálico/cirurgia , Doença Crônica , Face/microbiologia , Face/patologia , Face/cirurgia , Feminino , Humanos , Masculino , Mandíbula/microbiologia , Mandíbula/patologia , Maxila/microbiologia , Maxila/patologia , Meningite/etiologia , Meningite/microbiologia , Meningite/patologia , Meningite/cirurgia , Entorpecentes/administração & dosagem , Osteomielite/complicações , Osteomielite/microbiologia , Osteomielite/patologia , Estudos Retrospectivos , Sepse/etiologia , Sepse/microbiologia , Sepse/patologia , Sepse/cirurgia , Base do Crânio/microbiologia , Base do Crânio/patologia , Transtornos Relacionados ao Uso de Substâncias/complicações , Transtornos Relacionados ao Uso de Substâncias/microbiologia , Transtornos Relacionados ao Uso de Substâncias/patologia
12.
Int J Oral Maxillofac Implants ; 30(6): 1362-8, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26574861

RESUMO

PURPOSE: To determine the level of bacterial contamination in immediate implantation or augmentation sites vs pristine bone, before and after saline rinses. MATERIALS AND METHODS: Bacterial samples were taken from fresh extraction sites (17 patients) and pristine bone (15 patients) before performing implant dentistry surgical procedures. Levels of bacterial contamination were estimated before and after saline rinses. Samples from the socket were placed on an agar plate for total bacterial account and on selective plates for Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis counts. RESULTS: The level of bacterial contamination before saline rinse was 1.2 × 10(4) units of bacterial colony (CFU)/mL in fresh extraction sites (study group) and 5 × 10(2) CFU/mL in pristine bone sites (control group). After a saline rinse, the bacterial level was lowered significantly to 5.2 × 10(3) CFU/mL in the study group and to zero in the control group (P < .05). Levels of bacterial contamination were higher in the mandibular sockets (7.5 × 10(3) CFU/ml) than in the maxillary sockets (5.6 × 10(3) CFU/mL), and the difference was statistically significant (P = .034). All implanted/augmented fresh or pristine sites survived in the follow-up period. CONCLUSION: Fresh extraction sockets with clinical signs of infection show bacterial presence. Pristine bone shows a lower bacterial level. Saline rinse in addition to a decontamination protocol may reduce the level of bacterial contamination significantly both in fresh extraction sites and pristine bone.


Assuntos
Bactérias/isolamento & purificação , Antissépticos Bucais/uso terapêutico , Cloreto de Sódio/uso terapêutico , Extração Dentária , Alvéolo Dental/microbiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Aggregatibacter actinomycetemcomitans/isolamento & purificação , Aumento do Rebordo Alveolar , Carga Bacteriana , Estudos de Coortes , Implantação Dentária Endóssea/métodos , Implantes Dentários , Feminino , Humanos , Masculino , Mandíbula/microbiologia , Mandíbula/cirurgia , Maxila/microbiologia , Maxila/cirurgia , Pessoa de Meia-Idade , Porphyromonas gingivalis/isolamento & purificação , Estudos Prospectivos , Alvéolo Dental/cirurgia , Adulto Jovem
14.
Eur J Orthod ; 37(6): 565-9, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25564502

RESUMO

OBJECTIVE: To analyze in vivo mutans streptococci (MS) adhesion to self-ligating ceramic brackets [Clarity-SL (CSL) and Clippy-C (CC)] and the relationships between bacterial adhesion and oral hygiene indices. MATERIALS AND METHODS: Four central incisor brackets from the maxilla and mandible were collected from 40 patients (20 patients per each bracket type) at debonding immediately after plaque and gingival indices were measured. Adhesions of Streptococcus mutans, S. sobrinus, and total bacteria were quantitatively determined using real-time polymerase chain reaction after genomic DNA was extracted. Factorial analysis of variance was used to analyze bacterial adhesion to the brackets with respect to the bracket type and jaw position. Correlation coefficients were calculated to determine the relationships of bacterial adhesion to oral hygiene indices. RESULTS: Adhesion of total bacteria and S. mutans to CSL was higher than that to CC (P < 0.001). Adhesion of total bacteria to the mandibular brackets was higher than that to the maxillary ones (P < 0.001), while adhesion of S. mutans to the maxillary brackets were higher than that in the mandibular ones (P < 0.001). In particular, the proportion of S. mutans to total bacteria in CSL was higher than CC (P < 0.05) in the maxillary anterior teeth (P < 0.001). There were no significant differences in adhesion of S. sobrinus between the brackets and jaw positions. Interestingly, no significant relationships were found between bacterial adhesions and oral hygiene indices. LIMITATIONS: Complex bracket configurations may significantly influence bacterial adhesion to orthodontic brackets. Further in vivo study using bracket raw materials will help to define the relationships between bacteria adhesion and enamel demineralization. CONCLUSIONS: Because oral hygiene indices were not significantly correlated with adhesions of MS to self-ligating ceramic brackets, careful examinations around the brackets should be needed to prevent enamel demineralization, regardless of oral hygiene status.


Assuntos
Aderência Bacteriana/fisiologia , Braquetes Ortodônticos/microbiologia , Streptococcus mutans/fisiologia , Adolescente , Carga Bacteriana , Cerâmica/química , DNA Bacteriano/análise , Materiais Dentários/química , Placa Dentária/microbiologia , Índice de Placa Dentária , Feminino , Humanos , Masculino , Mandíbula/microbiologia , Maxila/microbiologia , Índice de Higiene Oral , Índice Periodontal , Estudos Prospectivos , Reação em Cadeia da Polimerase em Tempo Real , Streptococcus mutans/isolamento & purificação , Streptococcus sobrinus/isolamento & purificação , Streptococcus sobrinus/fisiologia , Propriedades de Superfície , Adulto Jovem
15.
PLoS One ; 9(6): e100285, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24979372

RESUMO

BACKGROUND: We derived mesenchymal stem cells (MSCs) from rat induced pluripotent stem cells (iPSCs) and transduced them with tumor necrosis factor alpha-stimulated gene-6 (TSG-6), to test whether TSG-6 overexpression would boost the therapeutic effects of iPSC-derived MSCs in experimental periodontitis. METHODS: A total of 30 female Sprague-Dawley (SD) rats were randomly divided into four groups: healthy control group (Group-N, n = 5), untreated periodontitis group (Group-P, n = 5), iPS-MSCs-treated and iPSC-MSCs/TSG-6-treated periodontitis groups (Group-P1 and P2, n = 10 per group). Experimental periodontitis was established by ligature and infection with Porphyromonas gingivalis around the maxillae first molar bilaterally. MSC-like cells were generated from rat iPSCs, and transducted with TSG-6. iPSC-MSCs or iPSC-MSCs/TSG-6 were administrated to rats in Group-P1 or P2 intravenously and topically, once a week for three weeks. Blood samples were obtained one week post-injection for the analysis of serum pro-inflammatory cytokines. All animals were killed 3 months post-treatment; maxillae were then dissected for histological analysis, tartrate-resistant acid phosphatase (TRAP) staining, and morphological analysis of alveolar bone loss. RESULTS: Administration of iPSC-MSC/TSG-6 significantly decreased serum levels of IL-1ß and TNF-α in the Group-P2 rats (65.78 pg/ml and 0.56 pg/ml) compared with those in Group-P (168.31 pg/ml and 1.15 pg/ml respectively) (p<0.05). Both alveolar bone loss and the number of TRAP-positive osteoclasts showed a significant decrease in rats that received iPSC-MSC/TSG-6 treatment compared to untreated rats in Group-P (p<0.05). CONCLUSIONS: We demonstrated that overexpression of TSG-6 in rat iPSC-derived MSCs were capable of decreasing inflammation in experimental periodontitis and inhibiting alveolar bone resorption. This may potentially serve as an alternative stem-cell-based approach in the treatment and regeneration of periodontal tissues.


Assuntos
Perda do Osso Alveolar/terapia , Infecções por Bacteroidaceae/terapia , Moléculas de Adesão Celular/genética , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais/metabolismo , Periodontite/terapia , Administração Tópica , Perda do Osso Alveolar/genética , Perda do Osso Alveolar/microbiologia , Perda do Osso Alveolar/patologia , Animais , Infecções por Bacteroidaceae/genética , Infecções por Bacteroidaceae/microbiologia , Infecções por Bacteroidaceae/patologia , Moléculas de Adesão Celular/metabolismo , Diferenciação Celular , Engenharia Celular , Modelos Animais de Doenças , Feminino , Expressão Gênica , Células-Tronco Pluripotentes Induzidas/citologia , Células-Tronco Pluripotentes Induzidas/metabolismo , Injeções Intravenosas , Interleucina-1beta/sangue , Maxila/metabolismo , Maxila/microbiologia , Maxila/patologia , Células-Tronco Mesenquimais/citologia , Dente Molar/metabolismo , Dente Molar/microbiologia , Dente Molar/patologia , Osteoclastos/microbiologia , Osteoclastos/patologia , Periodontite/genética , Periodontite/microbiologia , Periodontite/patologia , Porphyromonas gingivalis/patogenicidade , Porphyromonas gingivalis/fisiologia , Ratos , Ratos Sprague-Dawley , Transdução Genética , Fator de Necrose Tumoral alfa/sangue
16.
BMC Oral Health ; 14: 89, 2014 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-25027664

RESUMO

BACKGROUND: Porphyromonas gingivalis has been shown to invade osteoblasts and inhibit their differentiation and mineralization in vitro. However, it is unclear if P. gingivalis can invade osteoblasts in vivo and how this would affect alveolar osteoblast/osteoclast dynamics. This study aims to answer these questions using a periodontitis mouse model under repetitive P. gingivalis inoculations. METHODS: For 3-month-old BALB/cByJ female mice, 10(9) CFU of P. gingivalis were inoculated onto the gingival margin of maxillary molars 4 times at 2-day intervals. After 2 weeks, another 4 inoculations at 2-day intervals were applied. Calcein was injected 7 and 2 days before sacrificing animals to label the newly formed bone. Four weeks after final inoculation, mice were sacrificed and maxilla collected. Immunohistochemistry, micro-CT, and bone histomorphometry were performed on the specimens. Sham infection with only vehicle was the control. RESULTS: P. gingivalis was found to invade gingival epithelia, periodontal ligament fibroblasts, and alveolar osteoblasts. Micro-CT showed alveolar bone resorption and significant reduction of bone mineral density and content in the infected mice compared to the controls. Bone histomorphometry showed a decrease in osteoblasts, an increase in osteoclasts and bone resorption, and a surprisingly increased osteoblastic bone formation in the infected mice compared to the controls. CONCLUSIONS: P. gingivalis invades alveolar osteoblasts in the periodontitis mouse model and cause alveolar bone loss. Although P. gingivalis appears to suppress osteoblast pool and enhance osteoclastic bone resorption, the bone formation capacity is temporarily elevated in the infected mice, possibly via some anti-microbial compensational mechanisms.


Assuntos
Perda do Osso Alveolar/microbiologia , Infecções por Bacteroidaceae/fisiopatologia , Osteoblastos/microbiologia , Osteoclastos/microbiologia , Osteogênese/fisiologia , Periodontite/microbiologia , Porphyromonas gingivalis/fisiologia , Perda do Osso Alveolar/patologia , Processo Alveolar/microbiologia , Processo Alveolar/patologia , Animais , Densidade Óssea/fisiologia , Contagem de Células , Modelos Animais de Doenças , Epitélio/microbiologia , Feminino , Fibroblastos/microbiologia , Fluoresceínas , Corantes Fluorescentes , Gengiva/microbiologia , Maxila/microbiologia , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos , Ligamento Periodontal/microbiologia , Ligamento Periodontal/patologia , Microtomografia por Raio-X/métodos
17.
BMC Infect Dis ; 13: 59, 2013 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-23374883

RESUMO

BACKGROUND: Aspergillus tubingensis is a black Aspergillus belonging to the Aspergillus section Nigri, which includes species that morphologically resemble Aspergillus niger. Recent developments in species determination have resulted in clinical isolates presumed to be Aspergillus niger being reclassified as Aspergillus tubingensis by sequencing. We present a report of a patient with an osteomyelitis of the maxillary bone with a probable invasive Aspergillus tubingensis infection. CASE PRESENTATION: We describe an immune compromised patient suffering from osteomyelitis of the maxillary bone after tooth extraction. The osteomyelitis probably resulted in dentogenic pansinusitis presenting as an acute ethmoiditis. Histologic examination of biopsy samples showed osteomyelitis, and inflammation of the surrounding connective tissue. Cultures of the alveolar wound grew Aspergillus tubingensis. The patient was treated with liposomal amphoterocin B, which was changed to oral treatment with voriconazole based on susceptibility testing (MIC for voriconazole was 1 µg/ml). CONCLUSION: This case shows that Aspergillus tubingensis may have the potential to cause severe invasive infections in immunocompromised hosts. A larger proportion of Aspergillus tubingensis isolates are less susceptible to azoles compared to Aspergillus niger. Therefore, correct species identification and susceptibility testing is crucial for the choice of anti-fungal treatment, screening of azole resistance, and characterization of the pathogenic potential of the various species within Aspergillus section Nigri.


Assuntos
Aspergilose/microbiologia , Aspergillus , Maxila/microbiologia , Infecções Oportunistas , Osteomielite/microbiologia , Aspergilose/diagnóstico , Aspergillus/classificação , Aspergillus/genética , Humanos , Masculino , Maxila/diagnóstico por imagem , Osteomielite/diagnóstico , Filogenia , Radiografia , Tubulina (Proteína)/genética , Adulto Jovem
18.
J Oral Pathol Med ; 41(9): 702-12, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22417074

RESUMO

BACKGROUND: The aim of this study was to compare clodronate and zoledronic acid regarding their influence on the repair of surgical wounds in maxillae (soft tissue wound and tooth extraction) and their relation to osteonecrosis. MATERIAL AND METHODS: Thirty-four Wistar rats were allocated into three groups according to the treatment received: (i) 12 animals treated with zoledronic acid, (ii) 12 animals treated with clodronate and (iii) 10 animals that were given saline solution. All animals were subjected to tooth extractions and surgically induced soft tissue injury. Histological analysis of the wound sites was performed by means of hematoxylin-eosin (H&E) staining and immunohistochemical staining for receptor activator of nuclear factor-kB ligand (RANKL), osteoprotegerin (OPG), von Willebrand factor, and caspase-3. RESULTS: The zoledronic acid group showed higher incidence of non-vital bone than did the clodronate group at the tooth extraction site. At the soft tissue wound site, there were no significant differences in non-vital bone between the test groups. RANKL, OPG, von Willebrand factor, and caspase-3 did not show significant differences between the groups for both sites of surgical procedures. CONCLUSION: Both of the bisphosphonates zoledronic acid and clodronate are capable of inducing maxillary osteonecrosis. Immunohistochemical analysis suggests that the involvement of soft tissues as the initiator of osteonecrosis development is less probable than has been pointed out.


Assuntos
Conservadores da Densidade Óssea/farmacologia , Ácido Clodrônico/farmacologia , Difosfonatos/farmacologia , Imidazóis/farmacologia , Maxila/cirurgia , Animais , Carga Bacteriana , Caspase 3/análise , Tecido Conjuntivo/efeitos dos fármacos , Tecido Conjuntivo/patologia , Epitélio/efeitos dos fármacos , Epitélio/patologia , Feminino , Maxila/efeitos dos fármacos , Maxila/microbiologia , Maxila/patologia , Doenças Maxilares/induzido quimicamente , Doenças Maxilares/patologia , Mucosa Bucal/efeitos dos fármacos , Mucosa Bucal/lesões , Osteonecrose/induzido quimicamente , Osteonecrose/patologia , Osteoprotegerina/análise , Ligante RANK/análise , Ratos , Ratos Wistar , Extração Dentária , Alvéolo Dental/efeitos dos fármacos , Alvéolo Dental/microbiologia , Alvéolo Dental/patologia , Cicatrização/efeitos dos fármacos , Ácido Zoledrônico , Fator de von Willebrand/análise
19.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 46(4): 226-9, 2011 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-21612712

RESUMO

OBJECTIVE: To detect the presence of Tannerella forsythus (Tf) and Prevotella intermedia (Pi) using polymerase chain reaction (PCR) in the oral plaque samples from children and investigate the relationship between bacteria and clinical parameters. METHODS: A total of 151 children aged 7 to 12 years were selected from Changchun primary school. The supragingival plaque sample was collected from the mesiobuccal and labial surfaces of the right maxillary central incisor (FDI1) and the right maxillary first molar (FDI6). Extracted DNA from plaque samples was used for PCR analysis. Intraoral examination, probing depth (PD) and bleeding on probing (BOP) were performed and recorded. RESULTS: The detection rate for Tf was 40.3% (118/293) and Pi was 46.4% (136/293) in supragingival plaque. The detection rates for Tf and Pi in molars were much higher than those in incisors (P < 0.01). The detection rate of Tf and Pi was positively related to BOP+ and PD. The detection rate for Pi decreased gradually with age, and the detection rate for Tf was highest in the group aged 7 to 8 and the detection rates for Tf and Pi were higher in the gingiva with BOP+ than that with BOP- (P > 0.05). The detection rates for Tf increased remarkably with BOP+ and especially when PD was greater than 4 mm. CONCLUSIONS: Detection rates of putative periodontal pathogens from healthy children of 7 to 12 years of age were high. The detection rates for Tf and Pi in molars were much higher than those in incisors, and the presence of Tf and Pi in supragingival plaque was related to periodontal parameters.


Assuntos
Bacteroides/isolamento & purificação , Placa Dentária/microbiologia , Incisivo/microbiologia , Dente Molar/microbiologia , Prevotella intermedia/isolamento & purificação , Fatores Etários , Criança , China , DNA Bacteriano/análise , Feminino , Humanos , Masculino , Maxila/microbiologia , Índice Periodontal , Reação em Cadeia da Polimerase
20.
Av. odontoestomatol ; 26(6): 295-300, nov.-dic. 2010. ilus
Artigo em Espanhol | IBECS | ID: ibc-95658

RESUMO

La Osteomielitis es una infección del tejido óseo que involucra a todas las estructuras del hueso provocada por microorganismos. El cuadro clínico se caracteriza generalmente por la presencia de fístula de drenaje, dolor intenso, inflamación, movilidad de los dientes involucrados en la zona afectada, fiebre y edema. El tratamiento consiste en medicamentoso y/o quirúrgico. En este artículo se presenta un caso de Osteomielitis crónica supurativa en el maxilar superior, que acomete a un paciente del sexo femenino de 82 años, en el cual se discuten los aspectos diagnósticos e histopatológicos como el tratamiento correspondiente del caso (AU)


Osteomyelitis is an infection of bone tissue that involves all structures of the bone caused by microorganisms. The clinical picture is generally characterized by the presence of fistula drainage, severe pain, swelling, mobility of teeth involved in the affected area, fever and edema. Treatment involves medication and / or surgery. This article presents a case of chronic suppurative osteomyelitis in the maxilar superior of a female 82 years old patient, as well as a discussion of clinical and histopathological aspects and the treatment employed (AU)


Assuntos
Humanos , Feminino , Idoso de 80 Anos ou mais , Osteomielite/diagnóstico , Maxila/microbiologia , Doenças da Boca/diagnóstico
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