000 03332cam a2200337 a 4500
003 EG-GiCUC
005 20250223031457.0
008 160420s2014 ua dh f m 000 0 eng d
040 _aEG-GiCUC
_beng
_cEG-GiCUC
041 0 _aeng
049 _aDeposite
097 _aM.Sc
099 _aCai01.09.09.M.Sc.2014.Mo.E
100 0 _aMohammed Alaa Alsibai
245 1 4 _aThe effect of finishing technique on the surface roughness and fracture resistance of In ceram crowns /
_cMohammed Alaa Alsibai ; Supervised Jylan Alguindy , Zeinab Nabil
246 1 5 _aتأثرطرق الانھاء على مقاومه الكسرفي التيجان الخزفيه
260 _aCairo :
_bMohammed Alaa Alsibai ,
_c2014
300 _a123 P. :
_bcharts , facsimiles ;
_c25cm
502 _aThesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine- Department of Prosthodontics
520 _aThe aim of this present study was to investigate the effect of different finishing techniques (A: Glazing, B: Re-glazing, C: polishing) on the fracture resistance and surface roughness of In - Ceram crowns. A total of thirty coping core samples were constructed by using (CAD/CAM system) and divided into two equal groups(15 for each groups) group A: In ceram zirconia blocks and group B: In ceram Alumina blocks, all samples then veneered by veneering material accordingto manufacture instruction. Each group were further subdivided according to the type of finishing technique into three equal subgroups (n = 5): subgroup I (A): autoglazed samples (control group), subgroup II (G): re- glazed samples after surface adjustment and subgroup III (P): polished samples using the recommended polishing kitby the manufacturer. The crowns shaped samples were cemented on epoxy - resin dies and where subject to fracture load testing using universal testing machine. Scanning electron microscopy (SEM) was employed to examine the morphology of the ceramic surface after different finishing techniques. Data were collected and statistically analyzed. For In ceram zirconiacrowns the results showed the polishing technique had significanthighest mean load at failure than other techniques, whilefor In ceram Alumina crownsexhibited a significantly higher mean load at failure with the glazing procedures.The results also revealedthe In ceram zirconia crowns had significantly highest mean of surface roughness for re- glazing and glazing techniques, while the polishing technique showed the statistically significant highest mean of surface roughness for In ceram Alumina crowns. Finishing and polishing of In-ceram zirconia crowns results higher fracture resistance than that produced with the glazing and re-glazing procedures. In-ceram alumina crowns exhibited a significantly higher fracture resistance with the glazing procedures. Glazing and re- glazing for In-ceram zirconia crowns results in more rougher surfaces than that with finishing and polishing procedures
530 _aIssued also as CD
653 4 _aIn ceram aluminafracture resistance
653 4 _aIn ceram zirconia
653 4 _aSurface roughness
700 0 _aJylan Alguindy ,
_eSupervisor
700 0 _aZeinab Nabil,
_eSupervisor
856 _uhttp://172.23.153.220/th.pdf
905 _aAml
_eCataloger
905 _aNazla
_eRevisor
942 _2ddc
_cTH
999 _c56102
_d56102