The ground state of KO revisited: the millimeter and submillimeter spectrum of potassium oxide.

The millimeter/sub-millimeter spectrum of the KO radical has been recorded in the frequency range 90-534 GHz using direct absorption methods. The radical was synthesized by reacting potassium vapor, produced with a Broida-type oven, with either N2O or O2 mixed in argon carrier gas. Twenty-seven rotational transitions of KO were measured, each exhibiting a doublet structure with a relatively small splitting (∼100-200 MHz) that increased noticeably with frequency.

Long-range cortical connections give rise to a robust velocity map of V1.

This paper proposes a two-dimensional velocity model (2DVM) of the primary visual cortex (V1). The model's novel aspect is that it specifies a particular pattern of long-range cortical temporal connections, via the Connection Algorithm, and shows how the addition of these connections to well-known spatial properties of V1 transforms V1 into a velocity map. The map implies a number of organizational properties of V1: (1) the singularity of each orientation pinwheel contributes to the detection of slow-moving spots across the visual field; (2) the speed component of neuronal velocity selectivity decreases monotonically across each joint orientation contour line for parallel motion and increases monotonically for orthogonal motion; (3) the cells that are direction selective to slow-moving objects are situated in the periphery of V1; and (4) neurons in distinct pinwheels tend to be connected to neurons with similar tuning preferences in other pinwheels.

Applied quantum chemistry: Spectroscopic detection and characterization of the F2BS and Cl2BS free radicals in the gas phase.

In this and previous work [D. J. Clouthier, J.

Structural determination and gas-phase synthesis of monomeric, unsolvated IZnCH3 (X̃(1)A(1)): a model organozinc halide.

The first experimental structure of a monomeric organozinc halide, IZnCH3, has been measured using millimeter-wave direct absorption spectroscopy in the frequency range 256-293 GHz. IZnCH3 is a model compound for organozinc halides, widely used in cross-coupling reactions. The species was produced in the gas phase by reaction of zinc vapor with iodomethane in the presence of a dc discharge.

An experimental and ab initio study of the electronic spectrum of the jet-cooled F2BO free radical.

We have studied the B̃ (2)A1-X̃ (2)B2 laser-induced fluorescence (LIF) spectrum of the jet-cooled F2BO radical for the first time. The transition consists of a strong 0(0)(0)band at 446.5 nm and eight weak sequence bands to shorter wavelengths.

Generalization of learning by synchronous waves: from perceptual organization to invariant organization.

From a few presentations of an object, perceptual systems are able to extract invariant properties such that novel presentations are immediately recognized. This may be enabled by inferring the set of all representations equivalent under certain transformations. We implemented this principle in a neurodynamic model that stores activity patterns representing transformed versions of the same object in a distributed fashion within maps, such that translation across the map corresponds to the relevant transformation.

Treatment of protruding osseo integrated dental implant.

Titanium dental implants have been used in the treatment of partial or complete edentulism. The height and width of the residual alveolus and surrounding anatomical structures can determine the proper position and path of insertion of dental implants. The following case report describes the treatment of a malpositioned osseo integrated dental implant with an apex perforating the buccal cortex of alveolar bone.

Optical-optical double resonance spectroscopy of the C(2)Pi-A(2)Pi and D(2)Sigma(+)-A(2)Pi transitions of SrF.

Optical-optical double resonance spectroscopy has been used to record rotationally resolved spectra of the C(2)Pi-A(2)Pi and D(2)Sigma(+)-A(2)Pi transitions of SrF. In the investigation, the spectrum of a previously unobserved (2)Sigma(+)-A(2)Pi transition was recorded. The new (2)Sigma(+) state was found to lie lower in energy than the previously labeled D(2)Sigma(+) (v = 0) state by an amount equal to the vibrational spacing of the D(2)Sigma(+) state.

Regenerative potential of platelet-rich plasma added to xenogenic bone grafts in peri-implant defects: a histomorphometric analysis in dogs.

Background: The purpose of this investigation was to evaluate the regenerative influence of platelet-rich plasma (PRP) added to xenogenic bone grafts on bone histomorphometric parameters in a dog model.

Methods: Ninety endosseous dental implants were inserted in the mandibles of nine hound dogs. Mesial and distal 3-wall peri-implant defects were surgically created adjacent to the implants.

Periodontal regeneration.

Untreated periodontal disease leads to tooth loss through destruction of the attachment apparatus and tooth-supporting structures. The goals of periodontal therapy include not only the arrest of periodontal disease progression,but also the regeneration of structures lost to disease where appropriate. Conventional surgical approaches (e.

Oral reconstructive and corrective considerations in periodontal therapy.

This paper was prepared by the Research, Science and Therapy Committee of the American Academy of Periodontology. It is intended to provide information for the dental profession and other interested parties. The purpose of this paper is to provide a general overview of oral reconstructive and corrective procedures used in periodontal therapy.

Influence of platelet-rich plasma added to xenogeneic bone grafts on bone mineral density associated with dental implants.

Purpose: The purpose of this study was to assess the bone mineral density changes after bone regeneration therapy using xenogeneic demineralized freeze-dried bone graft (DFDBG) plus platelet-rich plasma (PRP) and DFDBG alone in 3-wall peri-implant defects in dogs.

Materials And Methods: The mandibular premolars and molars of 9 adult hound dogs were removed surgically, and 90 sites were prepared for implant placement. Before implant placement, a total of 162 mesial and distal 3-wall peri-implant defects were surgically created.

Influence of platelet-rich plasma added to xenogeneic bone grafts in periimplant defects: a vital fluorescence study in dogs.

Background: The use of platelet-rich plasma (PRP) has been suggested in order to increase the rate of bone deposition when sites are augmented prior to or in conjunction with dental implant placement.

Purpose: The goal of this study was to investigate whether the addition of PRP to xenogeneic bone grafts would increase the rate of bone formation in dogs.

Materials And Methods: Ninety endosseous dental implants were inserted in the mandibles of nine hound dogs.

Enhancing efficiency and quality of ambulatory care through telehealth technology.

Technology has made great strides in healthcare, but has been slow in reaching a Senior's home or residence. At 35 million and growing, the Senior population is making it known that home is where they want to stay. Technology advancements in devices, communications, and wireless capability are now making possible the delivery of customized telehealth solutions to provide Seniors with "enabled independence," allowing them to confidently "age in place" at home or residence for much longer, with improved health outcomes and quality of life.

Desquamative gingivitis associated with IgG/IgA pemphigoid presents a challenging diagnosis and treatment: a case report.

Background: Mucous membrane pemphigoid (MMP) is a heterogeneous group of autoimmune blistering disorders characterized by subepithelial separation and the deposition of immunoglobulins and complement along the basement membrane zone (BMZ). This disease is diagnosed with direct immunofluorescence testing showing a linear deposition of immunoglobulins and/or complement along the BMZ and indirect immunofluorescence testing showing circulating IgG (and sometimes IgA) autoantibodies along the BMZ. In this case report we describe desquamative gingivitis secondary to IgG/IgA pemphigoid and the management of this challenging variant of MMP.

Tetracycline and other tetracycline-derivative staining of the teeth and oral cavity.

Tetracyclines (TCN) were introduced in 1948 as broad-spectrum antibiotics that may be used in the treatment of many common infections in children and adults. One of the side-effects of tetracyclines is incorporation into tissues that are calcifying at the time of their administration. They have the ability to chelate calcium ions and to be incorporated into teeth, cartilage and bone, resulting in discoloration of both the primary and permanent dentitions.

Maternal chronic infection as a risk factor in preterm low birth weight infants: the link with periodontal infection.

In the past decade, there has been mounting scientific evidence suggesting that periodontal disease may play an important role as a risk factor for adverse pregnancy outcomes. This article focuses on the definition, incidence, risk factors associated with preterm low birthweight infants (PLBW), the evidence linking chronic infections and PLBW, and the scientific evidence linking periodontal infections with adverse pregnancy outcomes. Additionally, this review summarizes the current epidemiological studies on the PLBW/infection relation and makes conclusions based on these results.

Assessment of peripheral dual-energy x-ray absorptiometry measurements in peri-implant bone defects in dogs.

Background: The goal of this study was to assess the variability of peripheral dual-energy x-ray absorptiometry (pDEXA) measurements in peri-implant bone defects in dogs.

Methods: Ninety dental implants were inserted in edentulous areas of nine foxhound dogs and standardized peri-implant bone defects were created on the mesial and distal aspect of each fixture (N = 144 total). The animals were sacrificed at 1, 2, and 3 months, respectively.

Successful treatment of oral lichen planus-like chronic graft-versus-host disease with topical tacrolimus: a case report.

Background: Bone marrow transplantation (BMT) is a common treatment used for deficiencies of host marrow or in the control of blood malignancies. Post-allogeneic BMT complications include graft-versus-host disease (GVHD). GVHD occurs when immunologically active T lymphocytes are transplanted into an immunosuppressed recipient who is genetically disparate from the donor.

Minocycline-induced staining of torus palatinus and alveolar bone.

Background: Minocycline hydrochloride, an analog of tetracycline, is widely used in the treatment of acne. Its use has been associated with discoloration of teeth, bone, and other tissues.

Methods: A case is presented involving a patient with minocycline-induced staining of the torus palatinus and alveolar bone.

Denture sore mouth.

The majority of the lesions associated with DSM are preventable and can be managed successfully by the dental professional. The hyperplastic tissue response seen in denture wearing patients generally requires surgical excision and follow-up. Health care providers should be encouraged to ask patients to remove their prostheses during a thorough examination of the oral tissues.

Is platelet-rich plasma the perfect enhancement factor? A current review.

Guided bone regeneration is an accepted surgical method employed in implant dentistry to increase the quantity and quality of the host bone in areas of localized alveolar defects. The lack of predictability in osseous regenerative procedures with various grafting materials suggests that improvement in the osteoinductive properties of these materials is highly desirable. Platelet-rich plasma (PRP), a modification of fibrin glue made from autologous blood, is being used to deliver growth factors in high concentration to sites requiring osseous grafting.

Pyostomatitis vegetans as an early sign of reactivation of Crohn's disease: a case report.

Background: The structures and lining of the oral cavity are an accessible mirror reflecting the health of an individual. They may play an important role in detecting and monitoring systemic diseases. Certain conditions that primarily affect other regions of the body may cause signs and symptoms in the mouth, either as the initial presenting symptom or in conjunction with other systemic manifestations.