Obviously one major goal in

Obviously, one major goal in implant dentistry is to avoid implant failure. Although the failure rate of implants used in two-stage procedures is rather low, it is likely that higher failure rates are associated with immediate loaded or grafted implants. Because primary stability is important in achieving osseointegration [36], selecting implants that maximize primary stability is essential when bone is limited in the maxillary sinus. Fixture designs (e.g., implant taper) can affect the initial stability of the implant [40]. In this study, tapered implants were used and had high success rates as they increase the chemicals learn this here now of bone and primary stability when placed into a conventional parallel osteotomy [41]. Degidi et al., in 2009 evaluated the ISQ values at 6 and 12 months from the implant insertion in sinus grafted and non-grafted sites. Sites treated with open sinus lift could offer good long-term stability. After 6 and 12 months, the geometric characteristics of the implant were no longer important to obtain high RFA values, and the bone implant contact was determinant [16], thus in the present study, implant stability was measured at four intervals for each implant; namely, immediately after placement as the primary stability, day 14 as the time for the newly formed woven bone around the implant, day 30 as the time when the woven bone lines most parts of the implant surface and the start of the remodeling phase, and finally day 60 as the time at which the implant surface is lined with lamellar bone as accepted in the literature for loading [42,43]. There was significant difference between ISQ values in both groups in the current study at the baseline, the difference had disappeared after the first month, and this could be explained by the occurrence of osseointegration.
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Introduction Rosai-Dorfman disease characterized by sinus histiocytosis with massive Iymphadenopathy (SHML). Rosai and Dorfman first described sinus histiocytosis with massive lymphadenopathy in 1969 [1]. The disease appears as a massive painless cervical adenopathy, and mainly affects the children or in young adults of African ancestry. Some variants of this disease may occur in extra-nodal sites, often without any involvement of lymph nodes. 43% of cases occur in extra-nodal disease, which may be widespread and most frequently involves the respiratory tract, paranasal sinuses, visceral organs, skin, bones, central nervous system, genitourinary tract and orbits [2]. This pathology is very rare and the involvement of temporoparietal parotid gland area is exceptional. In most cases this involvement presents lympho-proliferation in the soft tissues. Approximately 10% of all cases of Rosai-Dorfman disease (RDD) are associated with soft tissue involvement, but some may show a sole manifestation of the disorder [2,3]. The cause of RDD is not yet clear. Epstein-Barr virus [2] and human herpes virus have been isolated in a few patients, but clear association can\'t be verified. Autoimmune disease, immunocompromised, and neoplastic cell disease may be a cause but this remains unclear [2].
Case report On examination there was an erythematous undulant nodular mass in the left temporal area [Figs. 1 and 2]. The lesion had a smooth surface with normal surrounding skin and was not tender. The mass appeared to be adherent to the underlying tissue. Systemic evaluation of blood profile showed shifting from normal values. The patient underwent incisional biopsy and the mass was subjected to histopathological examination. EM examination with Haematoxylin and eosin stained sections showed a mixed cellular infiltration, predominantly composed of histiocytes that was mixed with lymphocytes including plasma cells and polymorphous nuclear leucocytes. emperipolesis was shown within several histiocytes, (displaying phagocytized lymphocytes). The histiocytes were filled with pink cytoplasm and contained lymphocytes, which is a pathognomic finding of rosai dorfman disease [Figs. 3 and 4]. Stains for bacteria, fungus and acid-fast bacilli were negative.