RESUMO
La, Ce, Nd, Sm, Eu, Gd, Dy particles and gold nanoparticles were prepared. Effects of La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au and Dy-Au particles on silver staining results were studied, respectively, and UV-Vis absorption spectra of La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au and Dy-Au particles were studied. Times and colors of sports with La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au, Dy-Au particles are longer and darker than that of with gold nanoparticles, respectively. The time of sport with Nd-Au particles is as long as 30 min, which is 2.7 times as long as with gold nanoparticles. Although amount of gold nanoparticles reduced 80%, the color of sport with Nd-Au particles is darker than that of with gold nanoparticles. In 200.00-800.00 nm, La, Ce, Nd, Sm, Eu, Gd, Dy particles and gold nanoparticles has one absorption peak, respectively, and λ(max) is 275, 277, 276, 276, 278, 277, 278 and 521 nm, respectively. La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au, Dy-Au particles have two absorption peaks, respectively, λ(max)(RE) and λ(max) are 276 and 522 nm, 276 and 522 nm, 276 and 523 nm, 276 and 523 nm, 276 and 522 nm, 276 and 522 nm, 276 and 523 nm, respectively. λ(max) of Au nanoparticles and La particles occurs red moving respectively, and λ(max) of Ce, Eu, Gd and Dy particles occurs blue moving, respectively, and λ(max) of Nd and Sm particles is constant respectively. Rare earths particles and gold nanoparticles may have interaction, respectively.
RESUMO
BACKGROUND: In this study, we investigated the correlation between odontogenic conditions and the presence of maxillary sinus (MS) abnormalities using cone-beam computed tomography (CBCT) imaging. METHODS: The study unit was defined as the ipsilateral MS, maxillary alveolar bone, and posterior teeth. The study included 1,140 study units from 570 patients visualized with CBCT. MS abnormalities, MS septal walls, the anatomical relationship between the MS and the teeth, and missing teeth were recorded. Adjacent odontogenic infections, including periapical lesions, periodontal bone loss, and combined periodontal-endodontic lesions, were documented, and the shortest distance between the infection and the MS floor was measured. The possible correlations between odontogenic conditions and MS abnormalities were analyzed. Whether the anatomical relationship between the MS and the teeth was related to age or sex was analyzed. The chi-squared test, Fisher's exact test, Mann-Whitney U test, Kruskal-Wallis H test, and logistic regression were used for the statistical analyses. RESULTS: MS abnormalities were detected in 57.54% of patients and 42.89% of MSs. Male sex (OR =1.653; P<0.001) and a MS adjacent to teeth with periapical lesions (OR =5.771; P<0.001), periodontal bone loss (OR =2.778; P<0.001), or combined periodontal-endodontic lesions (OR =13.818; P<0.001) increased the probability of MS abnormalities. In MSs with a single infected tooth, male sex (OR =2.413; P=0.045), infected molar (OR =3.431; P=0.008), and a smaller distance between the infection and the MS floor (OR =0.871; P=0.021) increased the probability of MS abnormality. The maxillary root apices of older subjects tended to be farther from the MS (P<0.001). CONCLUSIONS: Adjacent odontogenic infection increased the probability of MS abnormalities. The likelihood of MS abnormality was related to the distance between the infection and the MS, not to the type of infection.