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conferenceseries.com
Volume 6, Issue 9 (Suppl) Dentistry 2016
ISSN: 2161-1122 Dentistry, an open access journal Euro Dental Congress 2016
October 24-26, 2016
October 24-26, 2016 Rome, Italy
15th Euro Congress on
Dental & Oral Health
Dentistry 2016, 6:9 (Suppl)
The effect of metal surface treatment before reporcelainization for ceramic repair after adhesive
fracture of ceramo-metallic restoration.
Suhayla Reda Albanai
King Saud University, Riyadh,Saudi Arabia
Aim:
1) Testing of bond strength: (Using a universal testing machine) to investigate the effect of metal surface treatment (sandblasting,
grinding and grinding followed by sandblasting) before repocelainization of the bare metal on the bond strength.
2) Metallographic microscopic study :( using metallographical microscope) to give some light on the mechanism of metal ceramic
bonding.
Material and Methods: Two non-precious dental casting alloys, a nickel-chromium and a cobalt-chromium alloys, and one type of
dental ceramic, were commonly used were used. A total of 80 rod shaped metallic samples, 40 samples for each alloy, were used for
bond strength measurements and for metallographic study.
Results: Bond strength evaluation test: Co-Cr alloy exhibited the highest mean bonding value followed by Ni-Cr. For Ni-Cr alloy
the highest mean bond strength was obtained when the bare metal was treated with sandblasting. For Co-Cr alloy, the highest mean
bond strength was obtained when the bare metal was treated with sandblasting and when it was treated with grinding with P120D
silicon carbide emery paper.
CONCLUSIONS:1) It is possible to repair themetal/porcelain restoration interface after adhesive fracture 2) Direct reporcelainization
(without metal surface treatment) on the bare metal also gives adequate bond strength.3) Sandblasting increases the bond
strength of metal/porcelain interface for both the investigated alloys, namely Ni-Cr and Co-Cr.4) The cobalt-chromium alloy shows
better bond strength with sandblasting than the nickel-chromium alloy.5) Grinding procedure should not be used as a metal surface
treatment before reporcelainization because it lowers the bond strength in case of base metal alloys.
Periodontal muscle training can strength your teeth
Nima Sabzchamanara
Bogomolets National Medical University, Ukraine
Previous research on periodontal structure and function has shown a significant relationship between periodontal tissue and teeth.
This study assessed dentist's beliefs about the relative efficacy of the health of periodontal tissue. A total of 505 patients in general
practice were asked to respond to a list of 25 obligatory nourishment for a child while going to have the first teeth, for its effectiveness
in dealing with patient's periodontal health especially including chewing hard food; they were also asked to select the 3 most effective
nutrition for periodontal tissue. The indices of patient perceived importance of the periodontal health were derived and each were
compared with actual effectiveness as determined from a sample of 250 patients. Although the majority of patient rated 18 of 25
nutrition as being very effective, there was no significant association between patient perceived nourishment effectiveness and actual
effectiveness. The implications for patient training are discussed.