Aim: The present study was completed to evaluate the effect of silane on the push-out bond strength on fiber-reinforced posts. The intention of the study was also to determine if there was a regional relation between the adhesive system and the push-out bond strength of the fiber post. Materials and methods:Fifteen single rooted human teeth were endodontically treated and 2 mm diameter glass fiberreinforced composite posts were cemented in the root canal. In the first group Futurabond DC without silane, in the second group the same luting material after silane treatment of the posts, and in the third group Clearfil DC Core System without silane were used to lute the posts.After complete setting of the luting agents three 2-mm-thick slices were obtained from the cervical, middle, and apical regions of the roots. The specimens were subjected to push-out test in special equipment. Bond strength data were analyzed with analysis of variance tests. Results:The Rebilda posts cemented with Futurabond DC without silane had the highest push-out bond strength at the coronal region (164.71 N ± 72.12), while the posts cemented with Clearfil without silane had the lowest value at the apical region (94.86 N ± 34.14). Silane had no significance on the push-out bond strength (p = 0.909); however, the root canal dentin regions had a significant effect (p < 0.010). Conclusion:This study did not show any significant differences among different luting protocols. The bond strength was significantly higher in the coronal region due to the greater cemented surface area and the difference in dentin structure.Clinical significance: Based on the results of the push-out tests, the retention of the posts did not depend on the luting methods; however, the region of the root canal played a significant role.
Introduction: Calculus can accommodate teeth and prosthetic restorations when the patient's oral hygiene is poor. Hardened calculus cannot be removed by patients, it needs professional cleaning using ultrasonic scaler or hand instrument. Solutions dissolving and preventing accumulation of dental calculus may help to keep dentures clean. The aim of this investigation was to examine the effect of Periogen on dental calculus in vitro.
A klinikumban gyakori olyan páciensek kezelése, akiknek fogatlan a felső állcsontjuk, miközben a mandibula frontfogaimegtartottak. Az ilyen esetekben sokszor láthatunk specifikus elváltozásokat, amelyeket Kelly (1972) kombinációs szindrómanévvel foglalt össze.Vizsgálatunk célja az volt, hogy felmérjük, pácienseink körében előfordult-e az elmúlt 5 évben a kombinációs szindrómárajellemző tünetegyüttes, vagy valamelyik jellegzetesség.A PTE által használt informatikai rendszer segítségével 319 páciens nevét szűrtük ki, akiket foghiány diagnózissal rögzítettekaz elmúlt 5 évben. Ezek közül 220 páciens orthopantomogram felvétele állt rendelkezésre a kombinációs szindrómárajellemző tünetek gyakoriságának vizsgálatához. 34 beteg felvételén találtunk fogatlan felső állcsontot és meglévőalsó frontfogakat. A kombinációs szindróma fő tünete, a nagyfokú csonthiány a maxilla elülső régiójában 4 esetben voltlátható, ez 11,7%-os gyakoriságot jelent. A tuber maxillae hipertrófiája (9 esetben, 26,4%) az alsó frontfogak extrúziója(6 esetben, 17,6%) és az alsó állcsont disztális régiójának csontlebontódása (16 esetben, 47%) volt látható a felvételeken.A röntgenfelvételek alapján kiszűrt betegek közül három esetben került sor klinikai vizsgálatra, ami minden esetbenigazolta a röntgenfelvételen látott jellegzetességeket.A kombinációs szindróma gyakorisága saját beteganyagunkban lényegesen kisebb volt, mint más tanulmányokban,ismeretének klinikai jelentősége azonban nem elhanyagolható.
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