RESUMEN
Background/Objectives: The aim of this study was to evaluate incidental findings in the mandible after the placement of dental implants using a new cone-beam computed tomography (CBCT) software. Methods: The initial sample consisted of 2872 CBCT scans of patients of both sexes. The parameters evaluated in this study were the location of the implants in the mandible, implant length, anatomical relationship of the implant with the mandibular canal, presence or absence of damage to the adjacent teeth, presence or absence of implant fractures, and presence or absence of bone support. Fisher's exact test was performed to compare the variables. The significance level was set at p = 0.05. Results: Out of 2872 CBCT scans, 214 images of patients with an average age of 44.5 years were included. The most frequent location of the implants was the posterior region (93.5%), with 54% of the implants having a length between 9 and 14 mm. It was found that 92% of the implants were positioned above the mandibular canal. Damage to adjacent teeth was observed, with no correlation with the implant positioning (p = 1.000). In 100% of cases of implants in the anterior region, there was bone support. Fracture was observed in 1.7% of implants with a length between 9 and 14 mm. Conclusions: The installation of implants in the mandible occurs more frequently in the posterior region, with a high presence of bone support and a low incidence of damage to adjacent teeth, anatomical structures, and fractures.
RESUMEN
Avaliar o efeito antibacteriano de antissépticos bucais sobre bactérias facultativas por meio de testes de difusão em ágar e teste por exposição direta. Metodologia: Cepas de S. mutans (ATCC 25175), E. faecalis (ATCC 29212) e P. aeruginosa (ATCC 27853) foram inoculadas em 7 mL de brain heart infusion (BHI) e incubadas a 37°C por 24 horas. Para o teste de difusão em ágar, 15 placas de Petri com 20 mL de brain heart infusion agar (BHIA) foram inoculadas com 0,1 mL das suspensões microbianas, com auxílio de swabs esterilizados, de modo a se obter um crescimento confluente e uma placa de Petri não foi inoculada. Trinta e seis discos de papel com 9 mm de diâmetro foram imersos nas soluções experimentais de cloreto de cetilpiridínio 0,07%, cloreto de cetilpiridínio 0,075%, gluconato de clorexidina 0,12% e cloreto de benzalcônio 0,13% durante 1 minuto. A seguir, três discos de papel contendo uma das soluções irrigantes foram colocados sobre a superfície do BHIA. As placas foram mantidas por 1 hora em temperatura ambiente e incubadas a 37°C por 48 horas. Os diâmetros dos halos de inibição microbiana foram medidos valendo-se de duas medidas de forma perpendicular entre si, sendo obtida a média de seus comprimentos. Para o teste de exposição direta, 216 cones de papel absorventes esterilizados nº 50 foram imersos na suspensão de micro-organismos por 5 minutos, e a seguir foram colocados em placas de Petri e cobertos com 10 mL de uma das soluções testes. Em intervalos de 1, 5, 10 e 30 minutos, 3 cones de papel absorventes foram retirados do contato com as substâncias, transportados individualmente e imersos em 7 mL de Letheen Broth, e incubados a 37°C por 48 horas. O crescimento microbiano foi avaliado pela turbidade do meio de cultura. Um inóculo de 0,1 mL obtido do Letheen Broth foi transferido para 7 mL de BHI, e incubado nas mesmas condições descritas. O crescimento microbiano foi novamente avaliado pela turbidade do meio de cultura...
Purpose: To evaluate the antibacterial effect of four oral antiseptics (two solutions of cetylpyridinium chloride, chlorhexidine gluconate and benzalkonium chloride) on facultative bacteria using two methods. Methods: Strains were inoculated in 7 mL of brain heart infusion (BHI) and incubated at 37°C for 24 hours. For the agar diffusion test, 15 Petri plates with 20 mL of brain heart infusion agar (BHIA) were inoculated with 0.1 mL of microbial suspensions using sterile swabs to produce confluent growth; one Petri plate was not inoculated. Thirty-six 9-mm paper discs were immersed in the experimental solutions (0.07% cetylpyridinium chloride, 0.075% cetylpyridinium chloride, 0.12% chlorhexidine gluconate, and 0.13% benzalkonium chloride) for 1 minute. Subsequently, three paper discs containing irrigant solutions were placed on the BHIA in each plate. The plates were kept at room temperature for 1 hour and incubated at 37°C for 48 hours. Two measurements of the inhibition zones were made on the paper discs containing the solutions, and mean values were calculated. For the direct exposure test, 216 #50 sterilized paper points were immersed in the microorganism suspensions for 5 minutes, placed onto Petri plates and covered with 10 mL of irrigant solution. At one, five, 10 and 30 minutes, three paper points were removed from the contact substances, transported individually, immersed in 7 mL Letheen broth and incubated at 37°C for 48 hours. Bacterial growth was evaluated by turbidity. An inoculum of 0.1 mL Letheen broth was transferred to 7 mL BHI, and incubated as described above. Bacterial growth was evaluated according to turbidity. Results: Inhibition zones were greater than 10 mm for all substances and all microorganisms under study. The antibacterial...