Accuracy of Miniscrew Insertion with Fully Guided Dynamic Navigation Versus Freehand: An In Vitro Experimental Study

The placement of miniscrews in orthodontics enhances dental and skeletal movements with reduced need for patient cooperation but may lead to complications such as incorrect positioning or damage to adjacent teeth. Computer-assisted surgery techniques have shown improved accuracy and reduced risks. This study aimed to compare the accuracy of the X-Guide (R) dynamic navigation system with the freehand method for orthodontic miniscrew insertion and to assess the influence of screw position and side on accuracy. The main hypothesis was that the X-Guide (R) system would yield superior accuracy in the primary variable (3D apical deviation) compared to the freehand technique. Secondary hypotheses were that the X-Guide (R) system would also demonstrate superior accuracy in the secondary parameters (3D entry deviation, angular deflection, apical depth, and 2D entry deviation) and that screw position and side would not significantly affect any of the outcomes. An in vitro, randomized, and blinded experimental design was used with 10 maxillary models divided into two groups: experimental (X-Guide (R)) and control (freehand). In each model, six miniscrews were planned using cone beam computed tomography (CBCT): three were inserted freehand and three with navigation. A trained novice clinician performed all insertions. Post-placement CBCT scans were used to compare 3D deviations between planned and actual positions. Wilcoxon signed-rank tests and Friedman's ANOVA were applied. In conclusion, the results supported the main hypothesis regarding the primary variable: the X-Guide (R) system significantly improved miniscrew placement accuracy in terms of 3D apical deviation, even when used by a novice operator. However, the results partially rejected the secondary hypotheses related to precision, showing a significant improvement in 3D entry deviation with dCAS, but not in angular deflection or 2D measured parameters. Furthermore, the results supported the secondary hypothesis regarding screw position, which did not affect the outcomes. Nevertheless, with dCAS, a significantly greater deviation was found on the right side for 3D entry deviation, 2D entry deviation, and angular deflection

Informe d'experiències de suport compartit amb personal no docent de suport a Catalunya

En aquest document es recullen els principals resultats de la recerca ”Culturas, políticas y prácticas para la transformación educativa (CoN-Inclusión)“ finançada pel Ministerio de Ciencia, Innovación y Universidades i liderat per la Dra. Marta Sandoval de la Universidad Autónoma de Madrid que recull les experiències de col·laboració docent i codocència de docents d’Andalusia, Catalunya, Madrid i País Basc. El present informe inclou els resultats del personal no docent de suport de Catalunya. Aquests resultats es presenten d’una forma divulgativa i icònica, primer compartint dades sobre el personal no docent participant, l’alumnat que atén i les funcions que realitzen i, després, dades de com realitzen el suport compartit

La desamortizació del Trienni a Barcelona i el seu Pla

L'estudi de la desamortització eclesiàstica efectuada durant el Trienni podria, en principi, ésser estudiada a través de diverses fonts documentals. En primer lloc els expedients de venda dels béns desamortitzats que feia Hisenda, i que ara es troben a l'Arxiu de la Corona d'Aragó. Hem trobat tres lligalls d'aquests expedients tot i comprovar que en falten, això ha tret valor a la font que tot i així ens ha estat de gran utilitat.1 Per a completar les dades d'aquesta font hem recorregut a d'altres

New insights on the crustal deformation in the Eastern Betics from densified GNSS data

The Eastern Betic cordillera, southeastern Spain, is characterized by slow tectonic deformation rates and moderate seismicity. Great uncertainties persist regarding the precise kinematics of the main fault system within the region, the Eastern Betic Shear Zone (EBSZ). We present a new GNSS (Global Navigation Satellite System) velocity field in the Eastern Betics, including new episodic and continuous stations belonging to the GeoActiva network, as well as all available continuous stations in southern Iberia. We use this data to build kinematic models with elastic blocks, obtaining slip rates and locking ratios in the main faults of the EBSZ. Our model suggests that the central EBSZ is dominated by reverse and sinistral motion, accommodated by two fault branches closing the Guadalentín and Segura valleys. For the first time, we use geodetic data to quantify how slip is distributed between these branches in the central EBSZ: the Alhama de Murcia fault (western branch) accommodates up to 1.3 mm/yr sinistral and 0.6 mm/yr reverse slip, while the Palomares fault (eastern branch) is slower (0.5 mm/yr sinistral and 0.3 mm/yr reverse slip). Although slip rates are higher in the south Palomares and Carboneras faults, data scarcity limits their constraint. The deformation in the northern limit of the Eastern Betics appears to be distributed between the Jumilla and Crevillente faults. On a regional scale, our data suggest that the Nubia-Eurasia plate convergence is distributed radially from the Eastern Betics, consistent with the escape of multiple blocks driven by indentation and rollback tectonics in the Alboran Sea

A metagenomic study of patients with alveolar osteitis after tooth extraction. A preliminary case-control study

Objective: To identify the microbiome in sockets with alveolar osteitis and compare it with a control group using metagenomic techniques. Materials and methods: A case-control study was conducted in subjects that had undergone a tooth extraction. Microbiological samples were taken from the sockets of 10 patients with dry socket after tooth extraction (AO group) and 10 patients in whom exodontia resulted in no postoperative complications (control group). Bacterial DNA was isolated, and the 16S rRNA gene was amplified and sequenced. Multiplexed tag-encoded sequencing of DNA from the samples was performed, and the reads were processed by Metagenomic Rapid Annotation. Results: A total of 151 different species were found: 55 bacteria were only found in the AO group, 51 were specific to the control group, and 45 were common to both groups. The most frequently found genera in both groups were Prevotella. Prevotella nanceiensis, Actinomyces odontolyticus, Treponema maltophilum, Veillonella dispar, Tannerella forsythia, and Leuconostoc mesenteroides were found in several patients with alveolar osteitis, with an abundance greater than 0.5%, and were absent in all the control group samples. Conclusions: Patients who develop alveolar osteitis after dental extractions might have a different microbiota from that of patients without postoperative complications. Since this is a preliminary report, further research is needed to assess whether bacteria play an important role in the etiology of dry socket. Clinical relevance: This study seems to indicate that bacteria may play an important role in the alveolar osteitis etiology. Thus, new prevention and treatment strategies should be considered

Milliarcsecond angular resolution of reddened stellar sources in the vicinity of the Galactic center

Aims. For the first time, the lunar occultation technique has been employed on a very large telescope in the near-IR with the aim of systematically achieving milliarcsecond resolution on stellar sources. Methods. We have demonstrated the burst mode of the ISAAC instrument, using a fast read-out on a small area of the detector to record many tens of seconds of data at a time on fields of a few squared arcseconds. We used the opportunity to record a large number of LO events during a passage of the Moon close to the Galactic center in March 2006. We developed and employed for the first time a data pipeline for the treatment of LO data, including the automated estimation of the main data analysis parameters using a wavelet-based method and the preliminary fitting and plotting of all light curves. Results. We recorded 51 LO events over about four hours. Of these, 30 resulted in sufficient quality to enable a detailed fitting. We detected two binaries with subarcsecond projected separation and three stars with a marginally resolved angular diameter of about 2 milliarcsec. Two more stars, which are cross-identified with SiO masers, were found to be resolved and in one case we could recover the brightness profile of the extended emission, which is consistent with an optically thin shell. The remaining unresolved stars were used to characterize the performance of the method. Conclusions. The LO technique at a very large telescope is a powerful and efficient method for achieving angular resolution, sensitivity, and dynamic range that are among the best possible today with any technique. The selection of targets is naturally limited and LOs are fixed-time events; however, each observation requires only a few minutes, including overheads. As such, LOs are ideally suited to filling small gaps during the idle time between standard observations

Unidirectional Synchronization of Silicon Optomechanical Nanobeam Oscillators by External Feedback

The remote synchronization of oscillators is essential for improving the performance, efficiency, and reliability of various systems and technologies, ranging from everyday telecommunications to cutting-edge scientific research and emerging technologies. In this work, we unequivocally demonstrate a unidirectional type of synchronization between two self-sustained optomechanical crystal oscillators that interact solely through an external optical feedback stage. Several pieces of experimental evidence rule out the possibility of resonant forcing and, in contrast to previous works, indicate that synchronization is achieved in the regime of natural dynamics suppression. Our experimental results are in agreement with the predictions of a numerical model describing the specific mechanical lasing dynamics of each oscillator and the unidirectional interaction between them. The outcomes of our study pave the way toward the synchronization of clock signals corresponding to far-placed processing elements in a future synchronous photonic integrated circuit

Normative values for the video Head Impulse Test in children without otoneurologic symptoms and their evolution across childhood by gender

The video Head Impulse Test is routinely used to assess semicircular canal function in adults, but to date, pediatric reference values are scarce. This study aimed to explore the vestibulo-ocular reflex (VOR) in healthy children at different development stages and to compare the obtained gain values with reference to those in an adult population. Methods: This prospective, single-center study recruited 187 children from among patients without otoneurological diseases, healthy relatives of these patients, and staff families from a tertiary hospital. Patients were divided into three groups by age: 3-6 years, 7-10 years, and 11-16 years. The vestibulo-ocular reflex was assessed by video Head Impulse Test, using a device with a high-speed infrared camera and accelerometer (EyeSeeCam®; Interacoustics, Denmark). Results: We found a lower vestibulo-ocular reflex gain of both horizontal canals in the 3-6-year-old group when compared with the other age groups. No increasing trend was found in the horizontal canals from age 7-10 years to age 11-16 years, and no differences were found by sex. Conclusion: Gain values in the horizontal canals increased with age until children reached age 7-10 years and matched the normal values for adults

Acompañar. Elementos relacionales

Las herramientas que proporciona esta formación favoreceran el desarrollo de competencias para acompañar y fortaleceran la participación de la infancia en los municipios: más oportunidades de participación, más visibilidad como ciudadanía activa y capaz, más prácticas participativas colaborativas y deliberativas, más autogestión en los temas municipales

Espacios para la cogobernanza. La asamblea

Las herramientas que proporciona esta formación favoreceran el desarrollo de competencias para acompañar y fortaleceran la participación de la infancia en los municipios: más oportunidades de participación, más visibilidad como ciudadanía activa y capaz, más prácticas participativas colaborativas y deliberativas, más autogestión en los temas municipales