The diamond burr has been used in the management of corneal lesio

The diamond burr has been used in the management of corneal lesions in humans since 1983. Recently, it has been successfully used in the treatment of SCCEDs in dogs; however, little has been documented as to its mechanism of action.

Methods Five adult female research dogs euthanized for reasons unrelated to the study were included, providing AZD6738 10 normal eyes. An excimer laser spatula was used for epithelial removal after delineation with an 8 mm punch biopsy trephine. Diamond burr debridement was performed for 30 and 45 s in five eyes each (groups 1 and 2 respectively). The procedure was performed on the ventral half of the experimental defect as well as ventral

normal cornea, immediately after euthanasia, and prior to enucleation. Samples were processed routinely for histologic evaluation and stained with periodic acid-Schiff.

Results No stromal defects could be identified under light microscopy. In experimental corneal wounds, multi-focal areas remained covered by the epithelial basement membrane (BM) after diamond burr treatment in both groups (group 1 = 48% +/- 16SD, group 2 = 26% +/- 12SD). Removal of BM on group 2 was significantly higher than group 1 (P < 0.05).

Conclusions The diamond burr allows a safe method of debridement and does not create defects beyond the epithelial BM in corneal wounds in normal dogs. Evaluation of the diamond burr debridement in cases of SCCEDs

is warranted.”
“Two new phenylpropanoids, methyl 3-(2,4-dihydroxy-5-methoxyphenyl)propionate GSK1210151A in vivo (1) and butyl 3-(2,4-dihydroxy-5-methoxyphenyl)propionate (2), and one unusual propanoate, 5-hydroxyhexyl 2-hydroxypropanoate (3), were isolated from the fruits of Morinda citrifolia. Their structures were

established using MS and NMR methods.”
“This study was undertaken to evaluate outcomes for single (SLT) vs. bilateral lung transplantation (BLT) in patients with interstitial lung disease (ILD). One hundred and eleven patients with ILD who underwent lung transplantation between January 1993 and March 2009 were evaluated. Recipients with BLT were younger (43 +/- 12 vs. 57 +/- 7 years), and significantly more patients Tubastatin A in vitro with non-idiopathic pulmonary fibrosis (IPF) received BLT (50%) vs. patients with IPF (18%). BLT recipients had a significantly longer mean waitlist time (240 vs. 125 days), significantly higher systolic (51 +/- 18 vs. 40 +/- 11 mmHg) pulmonary artery pressures, were placed on cardiopulmonary bypass more frequently (67 vs. 31%), had a higher incidence of primary graft dysfunction (63 vs. 17%), more frequently were given prolonged peri-operative inhaled nitric oxide and more frequently required prolonged post-operative mechanical ventilatory support (6.0 vs. 1.7 days). Additionally, BLT recipients had a significantly longer intensive care unit (8 vs. 4 days) and hospital (24 vs. 15 days) length of stay. We did not detect a difference in survival (Kaplan-Meier) for SLT vs. BLT.

(C) 2010 American

Institute of Physics [doi: 10 1063/1 3

(C) 2010 American

Institute of Physics. [doi: 10.1063/1.3459876]“
“Co-culture of primary rat hepatocytes with hepatic non-parenchymal cells or sinusoidal endothelial cells for albumin production activity as an index of liver-specific function was studied. The co-cultures were effective for the expression and maintenance of albumin production activity. However, the co-culture effect was not observed when we used a suitable culture BYL719 supplier medium, which had already been reported to be sufficient for albumin production activity. Albumin production of dispersed cells in collagen get culture was higher than that of spheroid culture. In addition, albumin production of spheroids in collagen gel culture was higher than that of spheroid culture and dispersed cell collagen gel culture Crenolanib research buy with a suitable culture medium. We found that culture medium composition was more important than co-culture for expression and maintenance of albumin production. Furthermore, we found that cell-cell interaction was effective for the expression of albumin production, but heterotypic

cell-cell interaction was not necessary. (C) 2009 Elsevier B.V. All rights reserved.”
“We investigate the film-growth process of the inhomogeneous sputtered TiO2 thin films by the in situ real-time spectroscopic ellipsometer. The growth process of the film is analyzed by both the uniform and the island film growth models. Based on the analyses from the Psi-Delta trajectories, the initial thin-film growth

corresponds to the island film growth model for a single-layer film. As the film grows, the microstructural phase changes cause the transition from the single-to the double-layer physical MI-503 ic50 model, because of the development of the inhomogeneity in the TiO2 thin film. The dynamic fits with the double-layer physical model and the Cody-Lorentz optical model indicate three different stages of the film growth: the nucleation stage, the coalescence stage, and the continuous-layer stage. Although our presented model works well for most of the experimental data, the determination of the refractive index at the ultrathin thickness may be problematic. (C) 2010 American Institute of Physics. [doi:10.1063/1.3457839]“
“Introduction:

Although African Americans (AA) are considered higher risk kidney donors than Caucasians, limited data are available regarding outcomes of AA donors.

Methods:

We performed a single-center retrospective review of all kidney donors from 1993 to 2007 and evaluated race/ethnic differences in post-donation changes in renal function, incident proteinuria, and systolic blood pressure (SBP) using linear mixed models.

Results:

A total of 336 kidney donors (63 AA, 263 Caucasian, 10 other) were evaluated. Before donation, AA had higher serum creatinine concentrations, estimated glomerular filtration rate (GFR) values, and SBP levels than Caucasians.

We found that the miR-122 serum concentration

correlated

We found that the miR-122 serum concentration

correlated with the level of ALT, HBV DNA and HBs antigen (r = 0.259, P < 0.05; r = 0.225, P < 0.05; r = 0.508, this website P < 0.001, respectively). The miR-122 serum levels discriminated the different patient groups infected with HBV from healthy subjects (P < 0.001), and inactive carrier patients with high (>3500 IU/mL) or low (<3500 IU/mL) levels of HBs antigen could be differentiated by the miR-122 serum concentration (P < 0.05). As serum miR-122 levels strongly correlated with HBs antigen, it might be an indicator for viral translation. Furthermore, serum miR-122 levels discriminated HBV carrier patients with high or low risk for disease progression and may, thus, be an additional marker for risk stratification.”
“A novel nanocomposite-based packaging (NCP) was prepared by blending polyethylene (PE) with nano-Ag, nano-TiO(2) and montmorillonite. The effects of NCP on the quality parameters of ethylene-treated mature kiwifruit were investigated during the 42 d of storage at 4 degrees C. The results showed that adding nanoparticles to the PE significantly AZD2014 decreased the oxygen, water vapor permeability and longitudinal strength, and inhibited spore germination. The weight loss, softening, color variation and soluble

solid content of kiwifruit were significantly inhibited by 22.67%, 124.84%, 23.46% and 14.42% respectively, which indicated that NCP could delay the ripening of kiwifruit. However, ascorbic acid and total phenols contents in NCP-treated fruit were increased compared with the controls. Additionally, kiwifruit in NCP exhibited

57.44% lower headspace ethylene concentration, 29.44% for malondialdehyde (MDA), lower polyphenol oxidase (PPO) activity and higher peroxidase (POD) activity than the controls. These results suggest that NCP may be a useful technique to reduce fruit decay and maintain quality in kiwifruits during postharvest storage. (C) 2011 Published by Elsevier Ltd.”
“Ionic liquid was synthesized and grafted onto the surface hydroxyl of mesoporous silica SBA-15 (IL-SBA). Porcine pancreas lipase (PPL) was successfully incorporated into the ionic liquid modified SBA-15 material by physical adsorption (PPL-IL-SBA). The enzymatic properties, including optimum temperature, www.selleckchem.com/products/mcc950-sodium-salt.html pH and reusability of PPL-IL-SBA, were investigated in the triacetin hydrolysis reaction. Compared with parent SBA-15 immobilized lipase (PPL-SBA), the enzymatic properties have dramatically improved, especially the optimized activity increased from 594 to 975 U/g PPL after modification. (C) 2010 Elsevier B.V. All rights reserved.”
“. Interferon alpha (IFN-a) therapy is widely used to treat patients with chronic hepatitis B (CHB) but the sustained response rate is low, and the molecular mechanisms for the ineffectiveness of IFN-a treatments are not known.

These effects were immediate and also outlasted the duration of s

These effects were immediate and also outlasted the duration of stimulation (“”carryover”"). Contingent HFES has multifarious and complex effects, intra- and interindividually, on seizure severity and TBS. Two inferences, at once promising and sobering may be drawn from these results: one, that contingent electrical stimulation deserves a place in the armamentarium of therapies for pharmacoresistant seizures, and the other, that its apparently narrow therapeutic

ratio calls for careful implementation and multivariate quantification of its effects. (C) 2010 Elsevier Inc. All rights reserved.”
“The first-order character of the transition from PHA-848125 in vitro the low-to-intermediate spin state in the system (Pr1-yYy)(0.7)Ca0.3CoO3 (y = 0.075-0.15) has been

verified by magnetization measurements. For y = 0.075, the transition manifests itself in chi(T) steps at temperatures depending on external fields. In this case, isothermal measurements show a field-driven transition exhibiting a field hysteresis. The entropy contribution is evaluated and discussed. Qualitative analysis based on a two-level model suggests that the observed influence of the magnetic field can be explained only by assuming the presence of exchange interactions. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3559485]“
“Novel organoclays were synthesized by several kinds of phosphonium cations to improve the Bucladesine cost dispersibility in matrix resin of composites and accelerate the curing of matrix resin. The possibility of the application for epoxy/clay nanocomposites and the thermal, mechanical, and adhesive properties were investigated. Furthermore, the structures and morphologies of the epoxy/clay nanocomposites were evaluated by transmission electron microscopy. Consequently, the corporation of organoclays with different types of phosphonium cations into the epoxy matrix led to different morphologies of the selleckchem organoclay particles, and then the distribution changes of silicate layers in the epoxy resin influenced the physical properties of the

nanocomposites. When high-reactive phosphonium cations with epoxy groups were adopted, the clay particles were well exfoliated and dispersed. The epoxy/clay nanocomposite realized the high glass-transition temperature (T-g) and low coefficient of thermal expansion (CTE) in comparison with those of neat epoxy resin. On the other hand, in the case of low-reactive phoshonium cations, the dispersion states of clay particles were intercalated but not exfoliated. The intercalated clay did not influence the T-g and CTE of the nanocomposite. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 666-675, 2011″
“Stroke in the developing brain is an important cause of chronic neurological morbidities including neurobehavioral dysfunction and epilepsy.

This case report underscores the possibility of tailoring therape

This case report underscores the possibility of tailoring therapeutic strategies for the gastroenteric expression of panic disorder.”
“Silicon nanocrystals (Si-ncs) have been produced by implantation of Si(+) in excess into SiO(2) followed

by both annealing and passivation using argon or nitrogen. Nitrogen increases the photoluminescence (PL) emission and shifts the spectra toward the blue. The measured Si-nc diameter is 4.3 and 3.8 LY3039478 nm after annealing performed under Ar and N(2), respectively. A significant quantity of nitrogen atoms has been detected in all samples by resonant nuclear reaction analysis (RNRA). The nitrogen concentration is significantly higher when the annealing and passivation are performed

in a nitrogen environment, in agreement with a larger Si-N vibration signal on the Raman spectra. The depth profiles of nitrogen are very similar to those of Si-nc, suggesting that the N(2) molecules may diffuse in the SiO(2) during the annealing and then are trapped in proximity to the Si-nc. In addition to Si(+), AZD7762 in vitro the implantation of N(2+) to concentrations of 3 and 6 at.% produced a decrease in the PL intensity (accentuated at the higher concentration) and an increase in the Raman signal associated to Si-N vibrations. These results suggest that a relatively low nitrogen atomic fraction enhances the PL emission, since a large nitrogen concentration impedes the formation of Si-nc thus significantly decreasing the PL intensity. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3054561]“
“Asperger syndrome

hinders adaptation to developmental challenges during childhood and adolescence, particularly with regard to interpersonal relationships. Individuals with Asperger syndrome display lack of empathy and limited ability to understand social and emotional exchanges with other people. Individuals with Asperger syndrome are significantly exposed to the risk of suicidal behavior, especially during adolescence. The authors describe cases of suicidal behavior in two adolescent boys with Asperger syndrome.”
“An investigation of the effect of interparticle interaction and particle size distribution has been carried out on iron oxide nanoparticles SB203580 mouse dispersed into porous Vycor glass. gamma-Fe2O3 nanoparticles dispersed into monoliths of Vycor glass were obtained using impregnation-decomposition cycles through the single-source metallo-organic decomposition process. Magnetic properties were investigated by ac magnetic susceptibility measurements, as a function of temperature at different frequencies, by measuring zero-field-cooled and field-cooled magnetization curves and by constructing hysteresis loops at different temperatures. A log-normal size distribution of monodomain nanoparticles has been deduced from the analysis of the magnetization curves.

The recurrence rate was assessed with NRS and ODI during the next

The recurrence rate was assessed with NRS and ODI during the next 24 months, and adverse events in each group were recorded.

During the 24-month follow-up after RFA and AA, one and 17 patients, respectively, were without recurring thoracolumbar facet joint pain. The median effective periods

in the RFA and AA groups were 10.7 (range 5.4-24) and 24 (range 16.8-24) months, respectively (p < 0.000). No significant complications were observed with the exception of injection site pain, which occurred in both groups.

In our patient cohort, alcohol ablation in medial branch neurotomy provided a longer period of pain relief and better quality of life than repeated radiofrequency medial branch neurotomy in the treatment of recurrent thoracolumbar facet joint pain syndrome after successful thermal RFA without significant complications during the 24-month AZD6244 follow-up.”
“Differential diagnosis of urticarial skin lesions not representing classic urticaria remains a challenge. Long-lasting nonpruritic urticarial plaques and the histopathologic finding of a dense infiltrate with neutrophil granulocytes are indicative for

a rare entity within a group of diseases termed LDN-193189 neutrophilic dermatoses. Here, we report a case of neutrophilic urticarial dermatosis characterized by nonpruritic urticarial skin lesions, histopathologic changes resembling Sweet syndrome, and simultaneous Still syndrome. After treatment with conventional immunosuppressives including systemic corticosteroids without disease control, the patient responded to anakinra therapy within days achieving

complete remission of skin lesions and systemic symptoms including fever and high C-reactive protein.”
“We present a novel framework for estimating the 3D poses and shapes of the carpal bones from single view fluoroscopic sequences. A hybrid statistical model representing both the pose and shape variation of the carpal bones is built, based https://www.selleckchem.com/products/nutlin-3a.html on a number of 3D CT data sets obtained from different subjects at different poses. Given a fluoroscopic sequence, the wrist pose, carpal bone pose and bone shapes are estimated iteratively by matching the statistical model with the 2D images. A specially designed cost function enables smoothed parameter estimation across frames and constrains local bone pose with a penalty term. We have evaluated the proposed method on both simulated data and real fluoroscopic sequences and demonstrated that the relative poses of carpal bones can be accurately estimated. One condition that may be assessed using this measurement is dissociation, where the distance between the bones is larger than normal. Scaphoid-Lunate dissociation is one of the most common of these. The error of the measured 3D Scaphoid-Lunate distances were 0.75 +/- 0.50 mm for simulated data (25 subjects) and 0.93 +/- 0.47 mm for real data (15 subjects).

Pain begins to subside after the first postoperative

Pain begins to subside after the first postoperative Silmitasertib research buy day, and normal activity resumes after 7 days. After IHR, children experience mild pain that can be treated with paracetamol and return to normal functioning after 4 days.”
“We present the design and fabrication of photonic crystal (PhC) based resonators for

terahertz quantum-cascade laser with a gain maximum at 2.7 THz. The PhC provides the confinement in lateral direction, for the vertical confinement a double-metal waveguide is used. We show theoretical and experimental analyses of devices based on a central gain region, which is surrounded by a PhC mirror. The devices are lasing in the bandgaps or at high-symmetry points of the PhC, depending on the period. These concepts learn more allow us to tune the emission of the lasers in the range of a few hundred gigahertz. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3117229]“
“Opsoclonus-myoclonus syndrome is characterized by abnormal lymphocyte trafficking into brain, The authors hypothesized that mycophenolate mofetil, a lymphocyte proliferation inhibitor, might be

therapeutic. The cerebrospinal fluid and blood immunophenotypes of 15 children with predominantly chronic-relapsing opsoclonus-myoclonus syndrome were compared before and after treatment by flow cytometry. Mycophenolate mofetil reduced the cerebrospinal fluid expansion of HLA-DR+ activated T cells (-40%); the frequency of other T-cell or natural killer cell subsets remained unchanged, but cerebrospinal fluid B cells increased significantly. Adrenocorticotropic hormone dose was lowered by 64% over an average of 1.5 years, yet 73% eventually relapsed despite therapeutic drug levels. Prior treatment with rituximab prevented relapse-associated increase in cerebrospinal fluid B cells, without hindering mycophenolate mofetil-induced reduction in T-cell activation. These data demonstrate resistant immunologic problems in chronic-relapsing opsoclonus-myoclonus syndrome. Mycophenolate mofetil

did not prevent relapse. JPH203 Transmembrane Transporters inhibitor The novel effect of mycophenolate mofetil on chronically activated T cells may contribute to its efficacy in T-cell mediated neurological disorders.”
“This article reports the compounds identified in the leaf oils of five Clauseana species growing in Vietnam. The hydrodistilled oils were analysed for their chemical constituents by using gas chromatography-flame ionisation detector and gas chromatography coupled with mass spectrometry. The major compounds identified in Clausena dentata (Willd.) M. Roem. were alpha-pinene (21.7%), sabinene (18.3%) and beta-myrcene (14.3%). Clausena dimidiata Tanaka comprised mainly of safrole (56.9%) and alpha-terpinolene (22.1%). However, 1-menthone (70.6%) and beta-phellandrene (13.0%) were the most abundant compounds of Clausena indica (Dalz.) Oliver. Sesquiterpene compounds represented mainly by beta-caryophyllene (16.7%), spathulenol (11.9%) and bicyclogermacrene (7.

(C) 2011 Society of Chemical Industry”
“The principal object

(C) 2011 Society of Chemical Industry”
“The principal objective of this study

was to investigate changes ill ice dendrite size during the freezing of tuna, in order to formulate a mathematical model of ice learn more dendrite size. The tuna was frozen Via a uni-directional heat transfer. Thermogram analysis allowed Lis to determine the position of the freezing front versus time, which is referred to as the fireezing front rate. The morphology of the ice dendrites was assessed via scanning electron microscopy after freeze-drying, and the retained pore size was measured as ice dendrites. We noted that the mean size of ice dendrites increased with the distance to the cooling plate; however. it decreased with reductions ill the cooling rate and the cooling temperature. In addition, shorter durations of the freeze-drying process decreased the

freezing front rate, resulting in a larger size Torin 1 of the ice dendrite pores that operate Lis water vapor sublimation channels. According to our results, we could derive a linear regression as an empirical mathematical model equation between the ice dendrite size and the inverse of the freezing front rate.”
“Purpose Since the Spine Tango registry was founded over a decade ago it has become established internationally. An annual report has been produced using the same format as the SWEspine group to allow for first data comparisons between the two registries.

Data was captured with the latest generation of surgery and follow-up forms. Also, the Core Outcome Measures Index (COMI) from interventions performed in the year 2012 with follow-up to June 2013 was analyzed. Groups of patients with the most common degenerative lumbar spine diseases and a single group of patients with degenerative cervical spine diseases were created. The demographics, risk factors, previous treatments, current treatment, short-term outcomes, patient satisfaction and complications were analyzed. Fer-1 Pre- and postoperative pain and function scores were derived from the COMI.

About 6,500 procedures

were captured with Spine Tango in 2012. The definitions and composition of all the degenerative groups could not completely be matched between the two registries with the consequence that the age and sex distributions were partially different. Preoperative pain levels were similar. The short-term outcomes available did not allow for evaluation of the final result of surgical intervention. This will be possible with the longer term data in the next annual report. There was a distinct disparity in reported complication rates between surgeons and patients.

This is a valuable first step in creating comparable reports for SWEspine and Spine Tango. The German spine registry may be able to collaborate in the future because of similar items and data structure as Spine Tango.

Low cytotoxicity of these polymers was also found in COS-7 cells

Low cytotoxicity of these polymers was also found in COS-7 cells. As a result, PEG-PCL-PAEAEMAs are attractive candidates as serum-tolerable gene carriers in biomedical field. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 666-674, 2011″
“The baroreflex control of circulation is always operating and modulates blood pressure and heart rate oscillations. Thus, the

study of cardiovascular variability in humans is performed in a closed-loop model and the physiology of post-sinoaortic denervation is completely unknown in humans. We dissected for the first time the different components of systolic arterial pressure (SAP) and RR-interval spectra in a patient with ‘baroreflex failure’ (due to mixed cranial nerve neuroma) who represents a human model to investigate the cardiovascular regulation in an open-loop condition. Interactions among cardiovascular variability signals and respiratory influences were described learn more using the multivariate parametric ARXAR model with the following findings: (1) rhythms unrelated to respiration were detected only at frequencies lower than classical low frequency Acalabrutinib nmr (LF; Slow-LF, around 0.02 Hz) both in SAP an RR spectra, (2) small high-frequency (HF) modulation is present and related with respiration at rest

and in tilt (but for SAP only) and (3) the Slow-LF fluctuations detected both in SAP and RR oscillate independently as the multivariate model shows no relationships

between SAP and RR, and these oscillations are not phase related. Thus, we showed that in a patient with impaired baroreflex arc integrity the Slow-LF rhythms for RR have a central origin that dictates fluctuations on RR at the same rhythm but unrelated to the oscillation of SAP (which ABT-263 may be related with both peripheral activity and central rhythms). The synchronization in LF band is a hallmark of integrity of baroreflex arc whose impairment unmasks lower frequency rhythms in SAP and RR whose fluctuations oscillate independently. Journal of Human Hypertension (2010) 24, 417-426; doi:10.1038/jhh.2009.79; published online 12 November 2009″
“Mn-doped PbZr0.52Ti0.48O3 (PZT) films were utilized to study the effect of acceptor dopant concentration on the mobility of ferroelectric domain walls. For chemical solution deposited PZT films between similar to 0.5-2 mu m in thickness doped with 1-2mol.% Mn, the low field relative permittivity remained between 900 and 1000. With increasing Mn concentration, a threshold field developed in the ac field dependence of the relative permittivity. Furthermore, both the reversible and irreversible Rayleigh constants decreased. These observations are consistent with the possibility that Mn`(Ti) – V-O(center dot center dot) (or Mn ”(Ti)-V-O(center dot center dot)) defect dipoles act as strong pinning centers. (c) 2011 American Institute of Physics. [doi:10.

The research recommendations provided will focus researchers on i

The research recommendations provided will focus researchers on important issues such as determining how structural change within the relatively short duration of a trial reflects long-term change in patient-centred outcomes. (C) 2011 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.”
“MicroRNAs (miRNAs) are a class of small non-coding RNAs which function in gene regulation with an important role in cell proliferation, maturation, and activity. The regulatory role of these small RNA molecules has recently begun

to be explored in ovarian cells, uncovering their influence on gonadal development, steroidogenesis, apoptosis, ovulation, and corpus luteum development. This RG-7112 emerging area of research has extended and reshaped our understanding on how ovarian function is regulated. Here, we review the current understanding of miRNA biogenesis, the role and mechanism that miRNAs play in post-transcriptional gene expression regulation, and specifically the current evidence of miRNA involvement in ovarian development and function. Future comprehensive understanding of the role of miRNAs in the ovary Entinostat inhibitor in both physiological and pathological

conditions may offer new treatment strategies for infertility and other ovarian disorders.”
“Temporomandibular joint (TMJ) disorder is a term that encompasses a number of overlapping conditions, such as closed lock. Closed lock of the TMJ is considered a Torin 2 cell line consequence of a nonreducing deformed disc acting as an obstacle to the sliding condylar head that usually causes a decrease in the maximum mouth opening and acute pain. The management of the TMJ is still controversial. Thus, arthrocentesis of the TMJ is a valuable modification of the traditional method of arthroscopic lavage, which consists of washing the joint in order to remove chemical inflammatory mediators and intra-articular adhesions, changing

intra-articular pressure. TMJ disorder has always presented as a therapeutic challenge to maxillofacial surgeons. Therefore, this paper aimed to describe a clinical report of a closed lock of the left TMJ in a 19-year-old female subject who was successfully treated by arthrocentesis procedure.”
“complication in implantology procedures due to the special features of the posterior aspect of the maxillary bone; there is also a possibility of migration throughout the upper paranasal sinuses and adjacent structures. The aim of this paper is to review the published literature about accidental displacement and migration of dental implants into the maxillary sinus and other adjacent structures.