Results 141 to 150 of about 760,948 (301)

The n-ary adding machine and solvable groups [PDF]

open access: yesInternational Journal of Group Theory, 2013
We describe under a various conditions abelian subgroups of the automorphism group $Aut(T_n)$ of the regular $n$-ary tree $T_n$, which are normalized by the $n$-ary adding machine $tau=(e,dots, e,tau)sigma_tau$ where $sigma_tau$ is the $n$-cycle $(0, 1 ...
Josimar Da Silva Rocha, Said Sidki
doaj  

Muscle tendon elongation with bovine pericardium (Tutopatch®) in patients with Graves’ orbitopathy; a prospective, observational, multicentre study

open access: yesActa Ophthalmologica, EarlyView.
Abstract Purpose Patients with severe ocular motility restriction and/or large angle strabismus due to Graves' orbitopathy (GO) cannot be adequately addressed with conventional strabismus surgery using large muscle recessions. Muscle tendon elongation surgery, using a spacer of bovine pericardium (Tutopatch®) has emerged as a valuable alternative.
H. M. Jellema   +7 more
wiley   +1 more source

Influence of Bone Density and Guide Protocol on the Accuracy of Self‐Cutting Implants Using Static Guided Implant Placement—An In Vitro Study

open access: yesClinical Oral Implants Research, EarlyView.
ABSTRACT Introduction To investigate the influence of bone density and guide protocol on the accuracy of static guided implant placement of self‐cutting implants in vitro. Methods A total of 242 implant replicas of self‐cutting implants and implants with a tapered design as a control were placed in 40 maxilla replica models with healed posterior ridges
Caroline Streichfuss   +2 more
wiley   +1 more source

Effect of artificial aging on fracture toughness and hardness of 3D‐printed and milled 3Y‐TZP zirconia

open access: yesJournal of Prosthodontics, EarlyView.
Abstract Purpose This study aimed to evaluate the impact of artificial aging on the fracture toughness and hardness of three‐dimensional (3D)‐printed and computer‐aided design and computer‐aided manufacturing (CAD‐CAM) milled 3 mol% yttria‐stabilized tetragonal zirconia polycrystals (3Y‐TZP). Materials and Methods Forty bar‐shaped specimens (45 × 4 × 3 
Abdulaziz Alhotan   +5 more
wiley   +1 more source

The Two-Generator Subgroups of One-Relator Groups with Torsion [PDF]

open access: yesTransactions of the American Mathematical Society, 1977
The main aim of this paper is to show that every two-generator subgroup of any one-relator group with torsion is either a free product of cyclic groups or is a one-relator group with torsion. This result is proved by using techniques for reducing pairs of elements in certain HNN groups. These techniques not only apply to one-relator groups with torsion
openaire   +1 more source

Assessment of fit accuracy and retentive strength of additively manufactured zirconia crowns luted to Ti‐base abutments with different resin cements: An in vitro study

open access: yesJournal of Prosthodontics, EarlyView.
Abstract Purpose This study investigated the influence of cement gap size on the marginal and internal fit, and cement gap size and type on retention of additively manufactured zirconia (AM‐Z) crowns on titanium bases (Ti‐base). Materials and Methods A total of 135 zirconia crowns were designed with three different cement gap sizes: 20 µm, 30 µm, and ...
Rafat Sasany   +2 more
wiley   +1 more source

On Elliptic Curves Via Heron Triangles and Diophantine Triples

open access: yesJournal of Mathematical Extension, 2014
In this article, we construct families of elliptic curves arising from the Heron triangles and Diophantine triples with the Mordell-Weil torsion subgroup of Z/2Z × Z/2Z.
F. Izadi, F. Khoshnam
doaj  

Effectiveness of Implant Therapy in Patients With and Without a History of Periodontitis: A Systematic Review With Meta‐Analysis of Prospective Cohort Studies

open access: yesJournal of Periodontal Research, EarlyView.
A history of periodontitis significantly increases the risk for implant loss, peri‐implant marginal bone loss and peri‐implantitis. ABSTRACT Aim This systematic review investigates the effectiveness of implant therapy in patients with and without a history of periodontitis in terms of implant loss, peri‐implant marginal bone loss (MBL), and occurrence ...
Marco Annunziata   +7 more
wiley   +1 more source

Does Computer‐Assisted Surgery Improve the Accuracy of Immediate Implant Placement? A Systematic Review and Network Meta‐Analysis

open access: yesJournal of Periodontal Research, EarlyView.
Computer‐assisted implant surgery (CAIS) enhances accuracy in immediate implant placement (IIP) compared to freehand, with no significant difference between CAIS techniques. The flapless technique is mainly used in IIP, reducing invasiveness and treatment time.
Lucia Schiavon   +4 more
wiley   +1 more source

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