1,721,042 research outputs found
The Use of a novel porcine derived acellular dermal matrix (mucoderm) in peri-implant soft tissue augmentation: Preliminary results of a prospective pilot cohort study
Full text linkObjective. Over the years, several techniques have been proposed for soft tissue augmentation around dental implants in order to improve keratinized mucosa width (KMW). Recently, a porcine derived acellular dermal matrix (Mucoderm) has been proposed as autogenous graft substitute in order to avoid palatal harvesting and obtain comparable results to connective tissue grafts, in terms of aesthetics and function. The aim of this study is to present the one-year follow-up results of this matrix in peri-implant soft tissue augmentation procedures. Material and Methods. Twelve patients were enrolled in this pilot prospective study: a dental implant was placed in the upper premolar area and, at implant uncovering after eight weeks, the matrix was inserted. KMW gain was considered as primary outcome variable. Results. After one month from matrix insertion, mean KMW was 7.86±3.22 mm (100%), with no statistically significant intragroup variations (p>0.05). No membrane exposures or wound healing complications occurred during postoperative phase and, after one year, mean KMW was 5.67±2.12 mm (72.13%). Conclusions. The results of the present pilot study indicate that by placing a Mucoderm membrane during implant surgery the keratinized tissue width can be augmented, and the width remains stable for the assessment period of 12 months. Further studies with greater power and longer investigation period are needed to confirm the suggestion for clinical use. Clinical trial registration number is EudraCT number 2018-000147-16
A combinatorial approach to the fusion process for the symmetric group
No full textWe give a detailed account of Cherednik’s fusion process for the symmetric group using as a key
tool the combinatorics of compatible orders on the set of inversions of permutations
Surgical management of acute retrograde peri-implantitis: a review of current literature
Full text linkAims: Periapical implant lesions, also named apical peri-implantitis or retrograde peri-implantitis, were described since 1992, and are characterized by progressive bone loss at the periapex of the implant. Several case reports have suggested these lesions are possible causes for early implant failure. The aim of this article was to review the Literature to identify current knowledge on surgical management of acute retrograde peri-implantitis.
Methods: The Authors conducted an independent search of the literature, for reports published from 1st January 2008 up to 1st December 2018 in English in several databases: Pubmed, Web of Science, SciVerse, MEDLINE and through The Cochrane Database of Systematic Reviews. Only articles reporting data on the surgical treatment of dental implants affected by retrograde peri-implantitis were included. Articles with unclear or unavailable data or with less than 6 months of follow- up were excluded.
Results: A total of 47 records was identified through database searching. After removal of duplicates, twenty-three studies were selected for title and abstract analysis, with 14 articles considered for detailed screening. Eight studies were included in the present review: four case series and four case reports. A total of 36 dental implants was treated, with follow-up ranging from 6 months to 6 years. Successful resolution of the peri-apical lesion was observed in 34/36 implants (94.5%), with complete radiographic bone fill and
absence of further symptomatology.
Conclusions: Several surgical techniques have been reported for lesions, with proper endodontic evaluation of adjacent teeth. Surgical and chemical debridement of the implant associated with GBR considered the preferred treatment option
ABELIAN SUBALGEBRAS OF Z_2-GRADED LIE ALGEBRAS AND AFFINE WEYL GROUP
No full textabstract allegato in formato pd
Utilizzo di una matrice xenogenica di collagene nell’aumento dei tessuti molli peri-implantari. Use of a xenogenic collagen membrane in peri-implant soft tissue augmentation
No full textOBJECTIVES Over the years, several techniques have been proposed for peri-implant soft tissue augmentation in order to improve keratinized mucosa width (KMW) and gingival thickness (GT). The aim of this study is to present the one year follow-up results of a xenogenic collagen matrix in augmentation procedures. MATERIALS AND METHODS Ten patients were enrolled in this prospective study: one dental implant was placed in the maxilla in the premolar area and, at the time of second stage surgery, the matrix was inserted. KMW and GT were recorded at 1, 3, 6 and 12 months. RESULTS Mean values of KMW and GT were respectively 1.47±0.23 and 1.35±0.32 mm at baseline, while after 1 year mean values of 4.17±1.98 and 4.12±2.12 mm were recorded. CONCLUSIONS According to the results of this work, KMW and GT were significantly augmented, demonstrating the clinical advantages of this new membrane
On some modules of covariants for a reflection group
Full text linkLet g be a simple Lie algebra with Cartan subalgebra h and Weyl group W. We build up a graded isomorphismh⊗H⊗hW →g⊗gg ofgg ∼=S(h)W- modules, where H is the space of W-harmonics. In this way we prove an enhanced form of a conjecture of Reeder for the adjoint representation
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