1,667 research outputs found
Graftless sinus augmentation technique with contextual placement of implants: a case report.
No full textINTRODUCTION:
The positioning of implants in the jaw bones with contextual graftless lateral approach sinus lifting is finding an increasingly broad consensus in the literature. Since the 1970s, various clinical research projects have been conducted on applications of biological and synthetic biomaterials in bone regenerative surgery, both in sinus lift procedures and in cystic cavity filling after cystectomy or in bone defects in regenerative periodontal surgery. Currently, we are finding that there is an increasing trend of clinicians aiming to adopt graftless techniques, with satisfactory results in terms of implant survival in the long term. In our study, through a case report, we describe a variant of graftless sinus augmentation technique with contextual implant placement, emphasizing the role of the blood clot, combined with collagen sponges, as a natural scaffold and the osteogenic potential of the subantral membrane in guided bone regeneration, with reduced morbidity of the patient.
CASE PRESENTATION:
To describe the surgical technique, the clinical case of a 38-year-old Caucasian woman with a lateral posterior edentulism was selected. The rehabilitation was solved by a graftless sinus augmentation technique with a contextual implant placement. For each implant, a resonance frequency analysis evaluation was reported as implant stability quotient values. The performance of the implant stability quotient values followed a gradual increase from time zero to the sixth month, as the clot was differentiated into osteoid tissue and then into bone tissue, due to the scaffold effect conferred by the equine collagen sponge. The stabilization phase took place between the fourth and the sixth month, according to the implant stability quotient values.
CONCLUSIONS:
Our graftless sinus augmentation technique seems to be very predictable thanks to the osteoconductive principles on which it is based, and in association with the proper management of peri-implant soft tissue, so as to increase the amount of keratinized tissue, which could represent the new gold standard for this type of rehabilitation in the future
Informed consent to medical treatment in pediatric dentistry: a proposal for two new model forms for the public health care system
No full textOver the last years, case-law and doctrine have increasingly focused on informed consent to medical treatments. This sensibility derives from the newly achieved awareness about the implications of the right to health and of the true interests underlying informed consent. Another reason is the ever-increasing litigation on the adequacy and correctness of the preliminary information given for medical treatments. Between 2008 and 2011 only, the Italian Supreme Court has ruled over a number of medical-liability cases that was equivalent to those decided during the decade 1991-2000, higher than all the judgments issued during the period 1942-1990. Among medical disciplines, also dentistry has been characterized by a meaningful increase in malpractice claims, from 3.6% in 2003 to 9% in 2010. In all those instances, inadequacy of preliminary information is one of the main arguments used by patients for their claims against health-care operators. The relevance of informed consent for dental treatments and therapies thus becomes apparent, both in relation to patients' awareness and for the legal protection of operators. The model forms attached to this publication have been developed keeping these factors in mind. The forms distinguish themselves for the possibility of customization and have been developed to fully support doctors in their preliminary communication with patients, before performing the medical treatment requested
Prevalence of maxillary canine impaction in skeletal Class III malocclusions compared to Class I malocclusions
No full textBackground: The aim of the present investigation was to evaluate if an orthodontic population of Class III malocclusion patients shows a different prevalence of maxillary canine impaction than Class I subjects.
Material and Methods: Fifty-eight subjects were retrospectively selected and assigned to the Class I group (n=
32) or the Class III group (n= 26), depending on the ANB and WITS values. Lateral cephalograms were used to
collect angular and linear measurements that described the skeletal and dental maxillary features of the subjects,
while orthopantomography was used to assess the impaction or the correct eruption of the maxillary canines. An
independent samples T-test or a Mann–Whitney U-test was used to compare the cephalometric values between the
two groups, while a chi-squared test was used to evaluate the distribution of maxillary canine impaction between
the two groups.
Results: No statistically significant difference was found for the cephalometric variables, and the frequency of
canine impaction showed no difference between the Class III and Class I subjects.
Conclusions: Patients with skeletal Class III malocclusions did not show a different prevalence of canine impaction; therefore, such skeletal features cannot be used as a diagnostic aid for assessment of the risk of maxillary canine impaction
Globalization of Distinguished Supercuspidal Representations of GL(n)
No full textAn irreducible supercuspidal representation of = GL(n, ), where is a nonarchimedean local field of characteristic zero, is said to be “distinguished” by a subgroup of and a quasicharacter of if Hom(, ) ≠ 0. There is a suitable global analogue of this notion for an irreducible, automorphic, cuspidal representation associated to GL(n). Under certain general hypotheses, it is shown in this paper that every distinguished, irreducible, supercuspidal representation may be realized as a local component of a distinguished, irreducible automorphic, cuspidal representation. Applications to the theory of distinguished supercuspidal representations are provided
Restriction of Representations of GL (n + 1, ℂ) to GL (n, ℂ) and Action of the Lie Overalgebra
No full textConsider a restriction of an irreducible finite dimensional holomorphic representation of GL(n+1,C) to the subgroup GL(n,C). We write explicitly formulas for generators of the Lie algebra gl(n+1) in the direct sum of representations of GL(n,C). Nontrivial generators act as differential-difference operators, the differential part has order n − 1, the difference part acts on the space of parameters (highest weights) of representations. We also formulate a conjecture about unitary principal series of GL(n,C).© The Author(s) 201
The Balanced Voronoi Formulas for
No full textAbstract
In this article, we show how the Voronoi summation formula of [13] can be rewritten to incorporate hyper-Kloosterman sums of various dimensions on both sides. This generalizes a formula for with ordinary Kloosterman sums on both sides that was used in [1] to prove nonvanishing of GL(4) -functions by GL(2)-twists, and later by the second-named author in [16].</jats:p
Bethe Vectors for Composite Models with gl(2|1) and gl(1|2) Supersymmetry
No full textSupersymmetric composite generalized quantum integrable models solvable by the algebraic Bethe ansatz are studied. Using a coproduct in the bialgebra of monodromy matrix elements and their action on Bethe vectors, formulas for Bethe vectors in the composite models with supersymmetry based on the super-Yangians Y[gl(2|1)] and Y[gl(1|2)] are derived.The author wants to express his gratitude to N.A. Slavnov for the proposal to investigate this
topic and discussions. He thanks also to S. Pakuliak for discussions and to A.P. Isaev and
C. Burd´ık for their support. The work of the author has been supported by the Grant Agency ˇ
of the Czech Technical University in Prague, grant No. SGS15/215/OHK4/3T/14, and by the
Grant of the Plenipotentiary of the Czech Republic at JINR, Dubna
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