1,721,006 research outputs found
Maxillary tooth splinting in periodontally compromised patients using fiber-reinforced composite: the Targis-Vectris method
Full text linkAIM: To show the Targis-Vectris retention technique, illustrating its features and clinical applications in periodontally compromised patients. METHODS: The Targis-Vectris technique is constituted by an esthetic external layer (Targis) combined with and supported by a metal-free structure (Vectris). An adult female with a full Class II malocclusion and compromised periodontal condition with significant bone loss on the maxillary central incisor was treated. Before debonding, a fiber-reinforced splint was placed on the palatal surface of the maxillary anterior teeth, using the Targis-Vectris method, to permit long-term stability. The final result remained stable at 5 years posttreatment. RESULTS: The correction of the Class II malocclusion took 24 months. The Targis-Vectris method ensured maintenance of tooth position and periodontal condition. CONCLUSION: The Targis-Vectris technique represents a useful procedure for splinting maxillary teeth in selected periodontally compromised patients. The 5-year posttreatment follow-up visit showed no relapse. Correct occlusal relationships are necessary to reduce the risk of breakage
The role of surface waves in prediction of ground vibrations from blasting
No full textSurface waves play a fundamental role in the propagation of vibrations caused by blasting. Indeed, active and passive surface wave tests, which are widely used techniques in engineering and geophysical exploration to infer model parameters for soils and rocks, can be profitably applied for the prediction of ground motion from blasting supplying relevant information on subsurface mechanical properties and source parameters (patterns of propagation and dominant wavelengths). In this respect, monitoring systems for ground vibrations can be conceived in order to use the collected data also for ground characterization purposes. Moreover, the interpretation of surface wave data can lead to an estimate of shear modulus and damping ratio (quality factor) as a function of depth. This information can be used to build a numerical model to simulate wave propagation and predict ground vibrations evaluating the performances of vibration mitigation systems. For preliminary assessments of ground vibrations induced by blasting, the information from surface wave tests can be used to improve the predictive capability of attenuation relationships. In particular in the present work reference is made to a recently proposed relationship based on energy spreading in the form of Rayleigh wave propagation. Data from a case history will be presented to exemplify the relevant aspects in the proposed methodolog
Aspetti epidemiologici delle batteriemie in Italia: osservazioni effettuate presso il Laboratorio di Microbiologia di Parma
No full text
Quality in the extra-analytical phases of urinalysis.
No full textQuality in the extra-analytical phases of urinalysis
- …
