COMPARATIVE STUDY OF VERTICAL MARGINAL FIT ON IMPLANT ABUTMENT USING METAL CERAMIC CROWNS, FULL CONTOUR ZIRCONIA CROWNS (CAD/CAM) AND VENEERED ZIRCONIA CROWNS (CAD/CAM) (AN IN VITRO STUDY)
Journal Title: World Journal of Pharmaceutical Research - Year 2017, Vol 6, Issue 10
Abstract
Background: Marginal fitness is an important factor in success and longevity of implant – retained restoration. Poor fitness and too large discrepancy lead to seepage of debris, cement dissolution and microbial colonization which lead to peri- implant inflammation and failure of implant restoration. Objective: To evaluate and compare vertical marginal fit among three materials used in construction crowns in the dental implant (metal- ceramic- full contour zirconia- veneered zirconia crowns. Material and method:- Four implant abutment on maxillary cast with first premolar and first molar (right & left )on both side receive thirty crowns on were divided into three group :-Group A:-10 samples were constructed with metal ceramic crowns used lost wax technique .Group B:-10 samples were constructed with full- contour zirconia crowns used (Imes –Icore) CAD-CAM system. Group C:-10 samples were constructed with veneered zirconia crowns used (Imes –Icore) CAD-CAM system. Vertical marginal gaps were measured at four points on each tooth surface. Sixteen points per tooth sample were measured using a digital microscope at a magnification of (230X).The marginal discrepancy found by use the mean of this sixteen points the Comparison of significance among the different groups using (Kruskal-Wallis H) test showed a statistically highly significant differences (p < 0.000). Furthermore, comparison of significance between each pair of groups using Paired-Samples, (Mann-Whitney U) showed statistically highly significant differences (p < 0.000). Results: The results of this study revealed that the least marginal gaps were, recorded at full contour zirconia crowns using CORETIC 250i (Imes –Icore) CAD-CAM system (39,239 -+26,575 um) and highest marginal gap were recorded at metal ceramic crowns using lost wax technique (92,513-+32,466 um) and veneered zirconia crowns were between of them (68,433-+40,346 um).In conclusion, full contour zirconia crowns constructed with CAD-CAM system provided better marginal fit and showed smaller marginal gap compare with metal ceramic crowns and veneered zirconia crowns.
Authors and Affiliations
Inas K. Mohammed and Asst. Prof. , Dr. Sabiha M. Kanaan
DETERMINATION OF BETA- CAROTENE AND VITAMIN A [RETINOL] IN PALM OIL FROM TWO VARIETIES OF PALM FRUITS (ELAEIS GUINEESIS TENERA AND DURA)
The two varieties of palm fruits, Elaeis guineansis (Tenera) and Elaeis guineensis (Dura) obtained from Ogbeke, Agbani in Enugu state was carried out to determine the Beta-carotene and Vitamin content using a spectrophot...
“A LITERARY REVIEW ON PAEDIATRIC CONSTIPATION W.S.R TO ORGANIC PATHOLOGY, ITS DIAGNOSIS AND MANAGEMENT.”
Constipation is a severe concern in day today outpatient and indoor admission in infant and young children. The evaluation of constipation involves first determining whether the change in the frequency or consistency of...
EFFECT OF PREGNANCY ON ENDOMETRIOSIS SYMPTOMS
Endometriosis is a disorder in which tissue that normally lines the uterus, called the endometrium, grows outside the uterine cavity. It can adhere to the outside of the uterus, the ovaries, and the fallopian tubes. The...
A REVIEW ON AMARANTHUS TRICOLOR AS A TRADITIONAL MEDICINAL PLANT
The present article is based on Amaranthus tricolor belonging to family Amaranthacea. Amaranthus tricolor is a topical annual herb with long leaves and small black seed and it can attain a height of maximum 5fits. The st...
PHYSICAL GROWTH PATTERNS IN TRANSFUSION-DEPENDENT THALASSEMIC CHILDREN AT WASIT CITY
Objectives: Aim of Study: The main aim of this study is to determine the effects of age, type of chelation therapy, ferritin level and hemoglobin level on the physical growth of transfusion dependent thalassemia children...