RESUMEN
Flourosis has a world wide occurence posing a serious health problems. Approximately 25 to 30 million people are exposed to water polluted with flouride. Half to one million people are suffering from severe forms of flouride intoxication in our country. In Telengana,Flourosis was detected as early as in 1937, the problem being acute in Nalgonda District. It is observed that hidden renal disease is one of the main factors for development of skeletal flourosis early. Individuals suffering from latent renal disease develop skeletal flourosis early,even while consuming low levels of flouride. In this study, 52 cases of skeletal flourosis with chronic renal failure were described between 1983 to 1998. A detailed clinical evaluation and skeletal survey were carried out for flourosis. Renal function tests were carried out to assess renal function. Ultra sound examination of abdomen was carried out to assess the size of the kidneys. The results and pathophysiology were also discussed.
RESUMEN
OBJECTIVES: The purpose of this in vitro study was to evaluate the microleakage and penetration of fissure sealant in permanent molar teeth with fluorosis after pretreatment of the occlusal surface. MATERIALS AND METHODS: A total of 120 third molars with mild dental fluorosis were randomly divided into 6 groups (n = 20). The tooth surfaces were sealed with an unfilled resin fissure sealant (FS) material. The experimental groups included: 1) phosphoric acid etching (AE) + FS (control); 2) AE + One-Step Plus (OS, Bisco) + FS; 3) bur + AE + FS; 4) bur + AE + OS + FS; 5) Er:YAG laser + AE + FS; and 6) Er:YAG laser + AE + OS + FS. After thermocycling, the teeth were immersed in 0.5% fuchsin and sectioned. Proportions of mircoleakage (PM) and unfilled area (PUA) were measured by digital microscope. RESULTS: Overall, there were significant differences among all groups in the PM (p = 0.00). Group 3 showed the greatest PM, and was significantly different from groups 2 to 6 (p < 0.05). Group 6 showed the lowest PM. Pretreatment with Er:YAG with or without adhesive led to less PM than bur pretreatment. There were no significant differences among groups in PUA. CONCLUSIONS: Conventional acid etching provided a similar degree of occlusal seal in teeth with fluorosis compared to those pretreated with a bur or Er:YAG laser. Pretreatment of pits and fissures with Er:YAG in teeth with fluorosis may be an alternative method before fissure sealant application.