Browsing by Subject "Implant"

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    A Maxillary Ridge-Splitting Technique Followed by Immediate Placement of Implants: A Case Report
    (Lippincott Williams & Wilkins, 2005) Calvo Guirado, Jose Luis; Saez Yuguero, María Rosario; Carrión del Valle, María José; Pardo Zamora, Guillermo; Dermatología, Estomatología, Radiología y Medicina Física; Facultades de la UMU
    Maxillary alveolar atrophy often limits the placement of dental im- plants. This article reports on a refine- ment of a technique for widening the atrophic ridge by splitting the alveolar bone longitudinally. Treatment of a patient with a severely resorbed eden- tulous maxilla is described. Six 4-mm wide by 13-mm long threaded Osseo- tite implants were placed immediately within thesplit ridge and surrounded- with amixture of autogenous tuberos- ity and bovine bone. The advantages of this technique for patients include less surgical trauma and condensed treatment time.
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    Atelo-collagen type I bovine bone substitute and membrane in guided bone regeneration: a series of clinical cases and histopathological assessments
    (Universidad de Murcia. Departamento de Biología Celular e Histología, 2019) Lucaciu, Ondine; Apostu, Dragos; Mester, Alexandru; Septimiu Campian, Radu; Gheban, Dan; Miron, Richard J.
    Absorbable atelo-collagen type 1 represents a new approach for guided bone regeneration with several reported advantages such as: osteoblast attachment, proliferation, mineralization potential, absorption of growth factors and inhibition of bacterial pathogen colonization. The aim of this study was to assess the clinical, radiological (preoperative width, re-entry width, gain), Periotest measurements and histologic benefits of atelo-collagen-derived bovine bone grafts (ImploBone) in combination with an atelo-collagen type I barrier membrane (ImploSorb) for guided bone regeneration (GBR) of atrophic alveolar crest in thirteen patients. Eleven patients underwent simultaneous GBR with implant insertion, two had initial GBR procedure followed by implant placement after 6 months of healing. Ridge augmentation was performed using an atelo-collagen membrane (ImploSorb, Bioimplon, Germany) and a combination of 50% ABBM (ImploBone, granule size 0.5-1mm, BioImplon Germany) mixed with 50% autologous bone. It was found that simultaneous GBR with implant placement resulted in a 35% gain at bone defect level (preoperative width 5.03±1.25 mm, re-entry width 6.81±0.98 mm, gain 1.78±1.71 mm). Implant placement performed in a 2 stage surgery 6 months following GBR was linked with a 63.9% gain at bone defect level (preoperative width 3.79±1.10 mm, re-entry width 6.22±1.41 mm, gain 2.43±1.43 mm). The total gain in both groups was 41.9% utilizing these novel biomaterials (preoperative width 4.68±1.32 mm, re-entry width 6.65±1.12 mm, gain 1.96±1.64 mm). This case series study presents a protocol where GBR can be performed either simultaneously to implant placement or delayed with this innovative biomaterial to favor bone regrowth. Future randomized controlled clinical trials are needed to further validate the bonepromoting potential of atelo-collagen-based biomaterials for bone regeneration.
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    Implant microbial colonization detected by sonication as a cause for spinal device failure
    (Lippincott, Williams & Wilkins, 2021-11-01) García Pérez, Daniel; Lagares, Alfonso; Castaño León, Ana María; Panero, Irene; Munarriz, Pablo M.; Delgado Fernández, Juan; Jiménez Roldán, Luis; Pérez-Núñez, Ángel; Alén, Jose Antonio F.; Paredes, Igor; Farmacología
    Study Design. A prospective single center observational study. Objectives. The aim of this study was to examine the potential role of sonication in the diagnosis of low-grade infections and its association with pedicle screw (PS) loosening, and to describe risk factors and radiological findings associated with spinal implant infection. Summary of Background Data. Although PS loosening has mainly been attributed to mechanical overload, implant colonization and biofilm formation have recently been suggested. Culturing of sonication fluid implants is promising in the field of spine instrumentation infection, but little data are available. Methods. We prospectively included all patients who were subjected to implant removal. PS loosening was assessed with computed tomography (CT) scan. Different clinical and radiological parameters which could serve as indicators of implant infection were studied. Results. Thirty-eight patients were included in the study and 11 of them (29%) had a positive sonication result. Patients with spinal implant infection were associated with screw loosening (P = 0.005). Particularly, those screws with a positive microbiological culture showed signs of screw loosening in the preoperative CT scan (P < 0.001). Our results also showed that radiological screw loosening at L1-L3 level, and loosened larger constructs were associated with screw microbial colonization. The most common isolated microorganisms were coagulase-negative staphylococci and Cutibacterium acnes. An implant-based multivariate analysis indicated that screw loosening, the absence of prophylactic cefazolin, ICU hospitalization, screw breakage, and L1-L3 spine level were independent risk factors for implant-associated infection. Our model exhibited a high predictive power with an area under the curve of 0.937. Conclusion. As clinical presentation of deep implant chronic infection is unspecific, consideration of these factors enables preoperative prediction and risk stratification of implant colonization, thus helping patient's management. Level of Evidence: 3