Colonization dynamics of subgingival microbiota in recently installed dental implants compared to healthy teeth in the same individual: a 6-month prospective observational study

Abstract Objectives To evaluate the colonization dynamics of subgingival microbiota established over six months around newly installed dental implants in periodontally healthy individuals, compared with their corresponding teeth. Methodology Seventeen healthy individuals assigned to receive single dental implants participated in the study. Subgingival biofilm was sampled from all implant sites and contralateral/ antagonist teeth on days 7, 30, 90, and 180 after implant installation. Microbiological analysis was performed using the Checkerboard DNA-DNA hybridization technique for detection of classical oral taxa and non-oral microorganisms. Significant differences were estimated by Mann-Whitney and Friedman tests, while associations between implants/teeth and target species levels were assessed by linear regression analysis (LRA). Significance level was set at 5%. Results Levels of some species were significantly higher in teeth compared to implants, respectively, at day 7 ( V.parvula , 6 × 10 5 vs 3 × 105 ; Milleri streptococci , 2 × 10 6 vs 6 × 10 5 ; Capnocytophaga spp., 2 × 10 6 vs 9 × 10 5 ; E.corrodens , 2 × 10 6 vs 5 × 10 5 ; N. mucosa , 2 × 10 6 vs 5 × 10 5 ; S.noxia , 2 × 10 6 vs 3 × 10 5 ; T.socranskii , 2 × 10 6 vs 5 × 10 5 ; H.alvei , 4 × 10 5 vs 2 × 10 5 ; and Neisseria spp., 6 × 10 5 vs 4 × 10 4 ), day 30 ( V.parvula , 5 × 10 5 vs 10 5 ; Capnocytophaga spp., 1.3 × 10 6 vs 6.8 × 10 4 ; F.periodonticum , 2 × 10 6 vs 10 6 ; S.noxia , 6 × 10 5 vs 2 × 10 5 ; H.alvei , 8 × 10 5 vs 9 × 10 4 ; and Neisseria spp., 2 × 10 5 vs 10 6 ), day 120 ( V.parvula , 8 × 10 5 vs 3 × 10 5 ; S.noxia , 2 × 10 6 vs 0; and T.socranskii , 3 × 10 5 vs 8 × 10 4 ), and day 180 ( S.enterica subsp. enterica serovar Typhi, 8 × 10 6 vs 2 × 10 6 ) (p<0.05). Implants showed significant increases over time in the levels of F.nucleatum , Gemella spp., H.pylori , P.micra , S.aureus , S.liquefaciens , and T.forsythia (p<0.05). LRA found that dental implants were negatively correlated with high levels of S. noxia and V. parvula (β=-0.5 to -0.3; p<0.05). Conclusions Early submucosal microbiota is diverse and only a few species differ between teeth and implants in the same individual. Only 7 days after implant installation, a rich microbiota can be found in the peri-implant site. After six months of evaluation, teeth and implants show similar prevalence and levels of the target species, including known and new periodontopathic species.

Hipertensão arterial sistêmica autorrelatada em pacientes atendidos no curso de Odontologia da Unigranrio e sua relação com parâmetros periodontais e CPOD / Self-reported systemic arterial hypertension in patients treated at Unigranrio's Dentistry course and its relationship with periodontal parameters and DMFT

Objetivo: Avaliar a frequência de hipertensão arterial sistêmica e sua associação com parâmetros periodontais e do índice de dentes cariados, perdidos, obturados (CPOD) em indivíduos atendidos na clínica do Curso de Odontologia da Unigranrio. Materiais e métodos: Noventa e cinco indivíduos de ambos os sexos foram incluídos no estudo entre março e maio de 2021. Os participantes responderam a questionários anamnésicos, tiveram sua pressão arterial sistêmica aferida e foram examinados para obtenção do índice CPOD e de parâmetros periodontais. Resultados: A frequência de hipertensão arterial sistêmica na população estudada foi 23,15%. Em pacientes com periodontite, essa prevalência foi 27%, e, em pacientes com gengivite, 19%. Pacientes com periodontite tiveram médias superiores de pressão arterial sistólica (PAS) e diastólica (PAD) comparado ao grupo com gengivite (p<0,0001). Foram identificadas correlações significativas positivas entre PAS e bolsas periodontais moderadas (rho=0,356) e profundas (rho=0,342), perda de inserção avançada (rho=0,538), CPOD (rho=0,365) e quantidade de dentes ausentes (rho=0,477), p < 0,001. A PAD apresentou correlações significativas (p < 0,001) positivas com bolsas periodontais moderadas (rho=0,331) e profundas (rho=0,283), perda de inserção avançada (rho=0,465), CPOD (rho=0,361) e dentes ausentes (rho=0,348). Conclusões: A frequência de hipertensão arterial sistêmica autorrelatada é relativamente alta na população estudada e, em especialmente, dentre as pessoas com periodontite. Pressão arterial sistólica e diastólica são correlacionadas positivamente com parâmetros periodontais indicadores de severidade de doença, assim como piores escores do CPOD.

Aim: The study evaluated the prevalence of systemic arterial hypertension and its association with periodontal parameters and decayed-missing-filled teeth (DMFT) index in individuals treated in a Dental School clinic. Material and methods: Ninety-five individuals of both genders were included in the study in the period between March and May 2021. All participants answered anamnestic questionaries, had their systemic blood pressure measured, and were examined to obtain the DMFT and periodontal parameters. Results: The prevalence of systemic arterial hypertension in the study population was 23.15%. In periodontitis individuals, that prevalence was 27%, and, in gingivitis patients, 19%. Patients with periodontitis have higher mean systolic (SBP) and diastolic (DBP) blood pressure compared with gingivitis individuals (p<0.0001). Significant positive correlations were found between SBP and moderate (rho=0.356) and deep (rho=0.342) periodontal pockets, severe attachment loss (rho=0.538), DMFT (rho=0.365), and amount of missing teeth (rho=0.477), p ? 0.001. The DBP showed significant (p?0.001) positive correlations with moderate (rho=0.331) and (rho=0.283) deep periodontal pockets, severe attachment loss (rho=0.465), DMFT (rho=0.361), and missing teeth (rho=0.348). Conclusions: The prevalence of systemic arterial hypertension is relatively high in the study population and, in particular, among individuals with periodontitis. Systolic and diastolic blood pressure are positively correlated with periodontal parameters that indicate the severity of disease, as well as with worse DMFT scores.

AVALIAÇÃO DO CONHECIMENTO DE MÉDICOS SOBRE A RELAÇÃO ENTRE DOENÇAS PERIODONTAIS E DOENÇAS SISTÊMICAS / EVALUATION OF PHYSICIANS' KNOWLEDGE ON THE RELATIONSHIP BETWEEN PERIODONTAL AND SYSTEMIC DISEASES

Existe uma conexão entre a saúde bucal e a saúde sistêmica, principalmente no caso de paciente portadores de doenças periodontais. Objetivo: O objetivo deste estudo é avaliar o conhecimento de médicos, que trabalham no Hospital Adão Pereira Nunes, Saracuruna, Duque de Caxias, sobre a relação entre doenças periodontais e doenças sistêmicas. Metodologia: Questionários com 13 perguntas, que incluem questões sobre a relação entre as doenças orais e as metabólicas foram aplicados a 50 médicos que trabalham no Hospital Adão Pereira Nunes, Saracuruna, Duque de Caxias. Os participantes foram grupados em até 8 anos de formado (n = 26) e mais de 8 anos de formado (n = 24). Os dados foram testados pelos testes Mann-Whitney e do Qui-quadrado, ao nível de significância a 5%. Resultados: A grande maioria dos participantes, independentemente do grupo, já referiu paciente ao cirurgião-dentista, e o principal motivo foi a presença de lesão intra-oral. Maior parte dos respondentes apontou o sangramento gengival como sintoma primário da doença periodontal. Além disso, quase 100% dos participantes apontou existir relação entre doença periodontal e doenças sistêmicas, sendo doença cardiovascular a mais frequentemente citada. O principal meio de obtenção de informação sobre o assunto citado foram livros e periódicos. Conclusão: A grande maioria dos médicos, participantes do presente estudo, está ciente da relação existente entre doenças periodontais e doenças sistêmicas, principalmente, as doenças cardiovasculares. Isto foi evidenciado pela alta taxa de encaminhamento dos pacientes a dentistas e o conhecimento sobre os sinais clínicos da doença periodontal.

There is a connection between oral and systemic health, especially concerning patients with periodontal diseases. Aim: The objective of this study was to evaluate the knowledge of physicians working at the Adão Pereira Nunes Hospital, Saracuruna, Duque de Caxias, on the relationship between periodontal and systemic diseases. Methodology: Questionnaires with 13 questions, which include questions about the relationship between oral and metabolic diseases, were applied to 50 physicians working at Hospital Adão Pereira Nunes, Saracuruna, Duque de Caxias. Participants were distributed to 2 groups, according with years of graduation (up to 8 years, n = 26; and over 8 years, n = 24). Data were tested for significant differences by Mann-Whitney and Chi-square tests, at a significance level of 5%. Results: The majority of the participants, regardless of the group, referred patients to the dentist, and the main reason was the presence of intra-oral lesions. Most respondents pointed to gingival bleeding as a primary symptom of periodontal disease. Almost 100% of the participants indicated a relationship between periodontal disease and systemic diseases; moreover, cardiovascular disease was the most frequently cited. Books and scientific periodicals were the main source of obtaining information on the matter. Conclusion: The great majority of participants physicians are aware of the relationship between periodontal diseases and systemic diseases, mainly cardiovascular diseases. This was evidenced by the high referral rate of patients to dentists and the knowledge about the clinical signs of periodontal disease.

Tratamento da peri-implantite com emprego de L-PRF: relato de caso clínico / Peri-implantitis treatment with adjunctive use of L-PRF: case report

Com o aumento do número de indivíduos reabilitados com implantes dentários, novas complicações clínicas estão surgindo, incluindo as doenças peri-implantares. Várias terapias conservadoras e cirúrgicas têm sido propostas para o tratamento da peri-implantite. Estas abordagens cirúrgicas podem ser complementadas com métodos regenerativos, nos quais poderiam ser englobadas as terapias com fibrina rica em plaquetas e leucócitos (L-PRF). Objetivo: O objetivo deste estudo é relatar um caso clínico de peri-implantite tratado com o emprego de L-PRF após 12 meses a partir da intervenção. Relato de caso: O paciente relatado apresentava três implantes instalados há 9 anos, que apresentavam médias de profundidade de sondagem e de nível clínico de inserção de 3,1 e 2,7 mm, respectivamente. O tratamento da peri-implantite consistiu em desbridamento com instrumentos manuais através de acesso cirúrgico e irrigados com clorexidina a 0,12%. Após estes procedimentos, os implantes receberam membrana de fibrina obtidas com a técnica para L-PRF. Após 12 meses, foi constatado redução das bolsas peri-implantares com redução de profundidade de sondagem para 2,3 mm e de nível clínico de inserção para 2 mm. No exame radiográfico, foi possível observar sinais radiográficos indicativos de preenchimento dos defeitos ósseos. Conclusão: O tratamento utilizado para tratar o caso de peri-implantite relatado, mecânico com acesso cirúrgico e uso de L-PRF, apresentou bons resultados clínicos e radiográficos aos 12 meses (AU)

Along with the increasing number of subjects receiving dental implants, new clinical complications are emerging, including peri-implant diseases. Different conservative techniques are being proposed to treat peri-implantitis. Such approaches include regenerative methods, in which leucocyte - and platelet - rich fibrin (L-PRF) is one of them. Aim: The aim of this study is to present a follow up of a clinical case of peri-implantitis treated with the use of L-PRF. Case report: The individual in this report had three dental implants installed 9 years before, presenting mean probing depth and clinical attachment level of 3.1 and 2.7 mm, respectively. The peri-implantitis treatment was performed by debridement of implants with manual instruments in a surgical approach, and irrigation with 0.12% chlorhexidine. After, implants received fibrin membrane obtained using the L-PRF method. At the 12 months follow up, it was observed a reduction in the probing depth and the clinical attachment level to 2.3 mm and 2 mm, respectively. Radiographic examinations showed indications of bone defect filling. Conclusion: The employed treatment to treat periimplantitis, mechanical with surgical approach and use of L-PRF, showed good clinical and radiographic results at 12 months of observation.(AU)

Predictors of clinical outcomes after periodontal treatment of aggressive periodontitis: 12-month randomized trial

Abstract Little is known about the factors that may be used in clinical practice to predict the therapeutic response of aggressive periodontitis patients. The aim of this study was to determine predictors of clinical outcomes after non-surgical treatment of aggressive periodontitis. A total of 24 patients (aged 13-26 years) received oral hygiene instructions, as well as subgingival scaling and root planing. Twelve subjects received systemic azithromycin at random. Clinical variables were assessed at baseline, 3, 6, 9, and 12 months. Baseline microbiological assessment was performed by checkerboard DNA-DNA hybridization. Multivariable models used generalized estimating equations. There were significant improvements in the entire sample in regard to pocket depth, clinical attachment level and bleeding on probing. Significant predictors of a reduction in mean pocket depth were: use of azithromycin, non-molar teeth, generalized disease and baseline pocket depth. Absence of plaque predicted a 0.22 mm higher attachment gain, whereas a baseline pocket depth ≥7 mm predicted a 1.36 mm higher attachment loss. Azithromycin, plaque, and baseline pocket depth were significant predictors of bleeding on probing. The concomitant presence of all three red complex species predicted a 0.78 mm higher attachment loss. It may be concluded that dental plaque, tooth type, disease extent, baseline pocket depth, and use of azithromycin were significant predictors of the clinical response to treatment for aggressive periodontitis in young individuals. Moreover, the presence of multiple periodontal pathogens may predict challenges in achieving a favorable outcome for aggressive periodontitis.

Effect of non-surgical periodontal treatment on the subgingival microbiota of patients with chronic kidney disease

This study investigated the effect of non-surgical periodontal therapy on the composition of subgingival microbiota of patients with chronic kidney disease (CKD). Sixteen CKD pre-dialysis individuals (CKD) and 14 individuals without clinical evidence of kidney disease (C) presenting chronic periodontitis were treated by scaling and root planing. Subgingival samples were collected from each patient and analyzed for their composition by checkerboard at baseline and 3 months post-therapy. Significant differences between groups at baseline were sought by the Mann-Whitney and χ² tests. Changes over time were examined by the Wilcoxon test. At baseline, the CKD group had significantly lower counts of E. faecalis compared to the C group (p < 0.05). After treatment, the levels of a greater number of species were reduced in the C group. Higher levels of A. israelii, C. rectus, F. periodonticum, P. micra, P. nigrescens, T. forsythia, N. mucosa, and S. anginosus (p < 0.05) were found in the CKD group compared to the C group. Also, non-responsive sites in CKD individuals harbored significantly higher levels of pathogenic species (T. forsythia, P. gingivalis, T. denticola, Fusobacterium spp., D. pneumosintes, E. faecalis and S. aureus; p < 0.05) than sites that responded to therapy, as well as non-responsive sites in the C group. The periodontitis-associated subgingival microbiota of CKD and systemically healthy individuals was similar in composition. However, high levels of pathogenic species persisted in the subgingival microbiota of patients with CKD after treatment.