13 research outputs found

    Functional and patient-centered treatment outcomes with mandibular overdentures retained by two immediate or conventionally loaded Implants: A randomized clinical Trial

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    [ES]Este estudio tiene como objetivo evaluar los resultados del tratamiento (funcionales y subjetivos) de sobredentaduras mandibulares retenidas sobre dos implantes con o sin un protocolo de carga inmediata. En este ensayo clínico aleatorizado, veinte pacientes completamente edéntulos fueron tratados con una sobredentadura mandibular retenida por dos implantes y una dentadura maxilar nueva completa. En la mitad de la muestra, los implantes se cargaron inmediatamente mediante pilares VulkanLoc® tras la colocación del implante, pero en las contralaterales, estos pilares VulkanLoc® se conectaron a los implantes dos meses después de la cirugía (protocolo convencional), y hasta ese momento las dentaduras postizas fueron retenidas por pilares de cicatrización. Los resultados del tratamiento se evaluaron a los dos, seis y doce meses después de la cirugía. Los resultados funcionales se calcularon según el rendimiento masticatorio, estimado por la fracción mixta de un chicle bicolor después de cinco, diez y quince golpes de masticación, por la fuerza oclusal registrada por las láminas sensibles a la presión y por la actividad muscular bioeléctrica. Los resultados subjetivos del tratamiento se evaluaron utilizando tanto la escala de satisfacción oral (escala visual analógica) como la versión española del Oral Health Impact Profile (OHIP-20). Los hallazgos del presente estudio muestran que las nuevas dentaduras postizas completas dieron como resultado mejoras significativas en la capacidad de masticación, la satisfacción del paciente y la calidad de vida relacionada con la salud bucal y que las posteriores sobredentaduras implantosoportadas produjeron mejoras significativas adicionales y más rápidas. El protocolo de carga puede influir en esos resultados positivos auto-informados en lugar de las evaluaciones funcionales objetivas[EN]This study aims to assess the treatment outcomes (functional and subjective) of mandibular overdentures retained on two implants with or without an immediate loading protocol. In this randomized clinical trial, twenty fully edentulous patients were treated with a mandibular twoimplant-retained overdenture and a complete new maxillary denture. In half of the sample, the implants were loaded immediately by means of VulkanLoc® abutments after emplacement of the implant, but in the counterparts, these VulkanLoc® abutments were connected to implants two months after the surgery (conventional protocol), and until that time the dentures were retained by healing abutments. Treatment outcomes were assessed at two, six, and twelve months after surgery. Functional outcomes were calculated according to masticatory performance, estimated by the mixed fraction of a two-coloured chewing gum after five, ten, and fifteen chewing strokes, by the occlusal force recorded by pressure-sensitive sheets, and by the bioelectrical muscular activity. The subjective outcomes of the treatment were assessed using both the oral satisfaction scale (visual analogue scale) and the Spanish version of the Oral Health Impact Profile (OHIP-20). The findings of the present study show that new complete dentures resulted in significant improvements in chewing ability, patient satisfaction, and oral health-related quality of life and that subsequent implant-retained overdentures produced further and faster significant improvements. The loading protocol may influence those positive self-reported outcomes rather than the objective functional evaluations

    Biomimetic gradient scaffolds containing hyaluronic acid and sr/zn folates for osteochondral tissue engineering

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    Regenerative therapies based on tissue engineering are becoming the most promising alternative for the treatment of osteoarthritis and rheumatoid arthritis. However, regeneration of full-thickness articular osteochondral defects that reproduces the complexity of native cartilage and osteochondral interface still remains challenging. Hence, in this work, we present the fabrication, physic-chemical characterization, and in vitro and in vivo evaluation of biomimetic hierarchical scaffolds that mimic both the spatial organization and composition of cartilage and the osteochondral interface. The scaffold is composed of a composite porous support obtained by cryopolymerization of poly(ethylene glycol) dimethacrylate (PEGDMA) in the presence of biodegradable poly(D,L-lactide-co-glycolide) (PLGA), bioactive tricalcium phosphate β-TCP and the bone promoting strontium folate (SrFO), with a gradient biomimetic photo-polymerized methacrylated hyaluronic acid (HAMA) based hydrogel containing the bioactive zinc folic acid derivative (ZnFO). Microscopical analysis of hierarchical scaffolds showed an open interconnected porous open microstructure and the in vitro behaviour results indicated high swelling capacity with a sustained degradation rate. In vitro release studies during 3 weeks indicated the sustained leaching of bioactive compounds, i.e., Sr, Zn and folic acid, within a biologically active range without negative effects on human osteoblast cells (hOBs) and human articular cartilage cells (hACs) cultures. In vitro co-cultures of hOBs and hACs revealed guided cell colonization and proliferation according to the matrix microstructure and composition. In vivo rabbit-condyle experiments in a critical-sized defect model showed the ability of the biomimetic scaffold to promote the regeneration of cartilage-like tissue over the scaffold and neoformation of osteochondral tissue.This research was funded by Spanish MICINN (MAT201573656-JIN), AEI-MICINN (PID2020- 114086RB-100) and CAM (IND2018/BMD-9485

    Estudio de diferentes modelos de regeneración ósea guiada previa a la colocación de implantes dentales osteointegrados

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    [ES] La escasez de soporte óseo maxilar para colocar implantes dentales, es un problema común en odontología. La regeneración de hueso para obtener suficiente volumen es una práctica habitual en clínica[EN] The shortage of jaw bone to support dental implants is a common problem in dentistry. The regeneration of bone to obtain sufficient volume is common in clinical practice

    Clinical outcome of a new surgical technique for the treatment of peri-Implant dehiscence in the esthetic area. A case report

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    [ES]Este estudio describe el resultado clínico y estético del tratamiento quirúrgico con acceso apical en un caso de dehiscencia de tejidos blandos periimplantario en un implante con mal pronóstico en el área estética. El paciente presentó una situación comprometida de pérdida de inserción clínica tanto en el implante 1.2 como en los dientes adyacentes. Se realizó un abordaje bifásico que consistió en realizar un injerto de tejido conectivo con acceso desde apical. 11 meses después, se realizó una técnica de colgajo palatino con injerto de tejido conectivo. Después de 20 meses de curación, los abordajes quirúrgicos sin incisiones de liberación vertical mostraron una ganancia en la reducción de la recesión sobre el implante desde 0,3 a 2,7 mm (IC 95%), además de una ganancia en anchura (2 mm) y espesor (2,3 mm) de la mucosa queratinizada. Respecto a la puntuación estética, en el blanco se ganaron 4 puntos y en el rosa 3 puntos. Con el uso de la técnica de abordaje apical y la técnica del colgajo palatino se obtienen resultados satisfactorios en el tratamiento de recesiones sobre implantes, mejorando de manera objetiva la cantidad de mucosa queratinizada y el resultado estético en la zona anterior.[EN]This study describes the clinical and esthetic outcome of n apical surgical treatment on peri-implant soft tissue dehiscence in an implant with a poor prognosis in the esthetic area. The patient presented a compromised situation of clinical attachment loss both in the 1.2 implant and in the adjacent teeth. A biphasic approach consisted firstly of a connective tissue graft accessed by apical and then, 11 months later, a palatal flap technique plus a connective tissue graft. After 20 months of healing, surgical approaches without vertical releasing incisions showed a gain in recession reduction over the implant ranging from 0.3 to 2.7 mm (CI 95%), in addition to a gain in width (2 mm) and thickness (2.3 mm) of the keratinized mucosa. With respect to the white esthetic score, 4 points were gained, and with respect to the pink esthetic score, 3 points were gained. With the use of the apical approach technique and the palatal flap technique, satisfactory results are obtained in the treatment of recessions on implants, improving the amount of keratinized mucosa and the esthetic result in an objective manner in the anterior area
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