RESUMEN
Replacement of missing teeth using dental implants has become the most frequently performed procedure. Following tooth loss, buccolingual bone width decreases significantly compromising the successful placement of dental implants. Various treatment modalities have been advocated in scenarios with insufficient buccolingual bone width like narrow diameter implant placement, horizontal guided bone regeneration, ridge splitting technique, and osseodensification. Maxillary anterior tooth loss is of prime esthetic concern, which needs immediate attention. Guided bone regeneration is the gold standard for patients presenting for rehabilitation in the anterior maxilla with inadequate buccolingual bone width. However, bone grafting techniques require longer treatment time; hence, various other techniques like lateral bone expansion, osseodensification, or socket shield technique are sought. This case series presents successful rehabilitation of the maxillary anterior esthetic zone with dental implants using various bone manipulation techniques, including lateral bone condensation, socket shield technique, and osseodensification.
RESUMEN
We describe and characterize a dual-channel incoherent broadband cavity-enhanced absorption spectrometer (DC-IBBCEAS) for the sensitive measurements of NOx: the sum of nitrogen monoxide (NO) and nitrogen dioxide (NO2) in the atmosphere. The instrument employs two 1 m long optical cavities, with air being extracted from a common sampling line. The first channel (cavity-1) spans 340-380 nm and the second channel (cavity-2) spans the 405-460 nm spectral range, both measuring NO2 simultaneously. High absorption cross-sections of NO2 in both channels are effectively utilized for its sensitive quantification. NO is quantified by titrating it with ozone to NO2 in channel-2, where the difference of NO2 measured from that in channel-1 corresponds to the NO concentration in the sampled air. The instrument offers 1-ppb detection sensitivity for both NO and NO2 with a maximum possible uncertainty of â¼9%. The use of close yet different spectral regions in the two channels readily extended measurements to a broader range without compromising its sensitivity to NOx quantification. This would extend the DC-IBBCEAS applicability to simultaneously monitor interfering species with significant absorption cross-sections in the region in either channel, such as glyoxal (CHOCHO), methylglyoxal (CH3COCHO), and nitrous acid (HONO).