دراسة سريرية مقارنة بين الجسور الخزفية- المعدنية والجسور الخزفية الخالية من المعدن

The aim of this research is getting clinical information comparing between advantages of Metal- Ceramic bridges & Metal –free ceramic bridges and their disadvantages . The partially missing teeth of /50/ patients were replaced by these two systems of ceramic prostheses ; Omega/900/ & In-ceram , from VITA co. for every patient. Their mouths cases were watched for three years from points: 1- Periodontal tissues responses. 2-Esthitc properties under different kinds of light. 3- Clinical requirements of installing each system. 4- Partial or complete failure of each system . The results of checking up of the mouths cases were collected by a special designed forms . then these results were analysisd by SPSS program version /11/ for evaluating the important of the statistical differences .The statistical tests - non parametric test- refereed to: 1-The differences between the two types of bridges were significant statistically from the points : A- There were positive responses of periodontal tissues toward In- ceram bridges. Whereas Metal –ceramic bridges had many negative reaction. B-Esthetic properties of In-ceram bridges under deferent types of light .whereas the appearance of metal-ceramic bridges defers according to surrounding light 2- There weren't significant differences between the two types of bridges from points: A-The need to indodontic treatments B-The need to strengthen the abutments by post and core. C-Rate of partial ore complete mechanical failures of the two types of bridges .   So ,we can conclude : that dentists can avoid esthetic & gingival negative response by using the in-ceram bridges instead of metal-ceramic bridges .without any confusion about its others properties