Marginal changes at bone-level implants supporting fixed screw-retained partial implant prostheses with or without intermediate standardised abutments: 1-year results of a randomised controlled clinical trial

Objective: To compare marginal changes at bone- level implants restored with screw- retained implant prosthesis with or without intermediate standardised abutments, after 1 year of follow-up.Materials and Methods: Thirty- six partially edentulous patients received 72 implants. Each patient received 2 implants and a 2- to 4- unit screw- retained implant- prosthesis. The test group received implants consisting of a screw- retained prosthesis connected directly to the implant shoulder, while the prostheses in the control group were con-nected through a 3- mm standardised intermediate abutment. Clinical and radiological data were recorded at baseline and at 3, 6 and 12 months in follow-up visits.Results: At 12 months, the marginal bone loss was 0.17 ± 0.24 mm for the test group (19 patients) and 0.09 ± 0.15 mm for the control group (17 patients), with no statistically significant differences (p> .05). The mean probing pocket depth was 2.96 mm ± 0.46 for the test group and 2.86 ± 0.62 mm for the control group. The test and control groups showed bleeding on probing levels of 18.86 ± 14.12% and 13.73 ± 17.66%, re-spectively. All patients scored below 25% on the plaque index levels.Conclusions: Restoration of bone- level implants with fixed screw- retained partial prostheses with or without intermediate abutments presented similar radiographic and clinical outcomes after 1 yearS

Análisis de la microbiota periodontopatógena en el síndrome de Down

A síndrome de Down (SD) é unha afección xenética que afecta ó cromosoma 21 e que presenta un fenotipo patognomónico, múltiples alteracións sistémicas e manifestacións orais características, entre elas a periodontite. O obxectivo desta tese foi determinar mediante secuenciación masiva (NGS) o microbioma oral das persoas con SD, comparando os achados cos obtidos mediante técnicas microbiolóxicas convencionais como o cultivo e a reacción en cadea da polimerase cuantitativa (qPCR). A análise microbiolóxica mediante secuenciación masiva permítenos afirmar que o microbioma subxingival das persoas con SD con periodontite é máis complexo e difire substancialmente dos SD periodontalmente sans, resultados que tamén se confirman na análise coas técnicas microbiolóxicas convencionais e valoradas