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Register a new userInfluence of bond agent polymerization on marginal adaptation of porcelain laminate veneers
دراسة تأثير تصليب العامل الرابط على الانطباق الحفافي للوجوه الخزفية التجميلية
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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أعطت الوجوه الخزفية التجميلية نتائج تجميلية واعدة في السنوات الأخيرة عند استخدامها كبديل عن الترميمات الخزفية المعدنية في المنطقة الأمامية، و يعتمد نجاح أي ترميم على المدى البعيد على انطباقه الحفافي، حيث تزيد الفرجه الحفافية من تراكم اللويحة الجرثومية و حدوث المرض حول السني. يهدف هذا البحث إلى تقييم التغير الحاصل في الانطباق الحفافي وفقاً لفترة تصليب العامل الرابط قبل إلصاق الوجوه الخزفية أو بعدها.
Porcelain Laminate Veneers have shown promising results recently when used as an alternative to metal ceramic restorations for the anterior teeth. Long-term success for any restoration depends on the marginal fit, because marginal gaps increase plaque accumulation and causing periodontitis. The aim of this study was to Asses marginal fit changes according to were curing the bond agent before or after cementation.
References used
Raigrodski AJ, Chiche GJ,Swift EJ, Jr. All-ceramic fixed partial dentures, Part III: clinical studies. J Esthet Restor Dent 2002;14(5):313-319
Roediger M, Gersdorff N, Huels A,Rinke S. Prospective evaluation of zirconia posterior fixed partial dentures: fouryear clinical results. Int J Prosthodont 2010;23(2):141-148
The Glossary of Prosthodontic Terms. J Prosthet Dent 2005;94,10-92
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It was recently noted that there are
serious trials to develop dental materials used in the prosthodontics.
As a result of this development, some veneering ceramic systems
used in metal-ceramic crowns have been appeared. In view of the
major impo
rtance of marginal fit and its role in the success of
restoration it must be a study and evaluation of marginal fit for these
modern systems.
This research aimed to comparasion of marginal fit for metal ceramic
crowns using two types of veneering ceramic.
The aim of this laboratory study was to evaluate the
internal fit of lithium disilicate glass ceramic laminate veneers
fabricating using heat-pressing technique and cemented using two
types of adhesive resin cement.
This study aimed to test the efficiency of debonding porcelain laminate veneers
(PLV) by using two application modes of Er:YAG laser (contact and non-contact mode),
and testing the change in dental pulp temperature for both application modes.
Sixt
een extracted, non-carious human maxillary premolars, prepared for receiving
PLV, which fabricated of e.max and bonded by light cured resin cement. They divided into
two groups, each of them had 8 samples based on the application mode; group A with noncontact
mode, and group B with contact mode. Veneers of both groups debonded by the
same laser parameters (360mJ, 15Hz) during loading of a 20newton force on a specially
fabricated cervical margin of veneers. Debonding time and change of temperature was
recorded, then entered into SPSS V.19 and T-test for independent samples was applied.
All veneers were debonded, samples of non-contact mode group had much lower
debonding time (12.6 second) than contact mode samples (96.3 second), but with higher
change of temperature in non-contact (4.2 centigrade) than in contact mode (2.9
centigrade).p value was much less than 0.05%.
Within limits of this study, we can conclude that non-contact application mode was
more efficient in reducing debonding time than contact application mode at same laser
energy and frequency parameters, but with a higher change in pulp temperature.
Porcelain is used in thin thicknesses to fabricate ceramic
veneers. The low fusing feldspathic porcelain used to fabricate porcelain
veneers is easily fractured, brittle porcelain before cementation to tooth
structure. However, its fracture resist
ance improves significantly after
etching with hydrochloric acid, applying the silane and luting to tooth
structure with resin cement.
Aim of the study: to evaluate the appropriate thickness of laminates made
from feldspathic porcelain and its relation to flexural strength.
إن الابتسامة الجميلة هي أداة ومفتاح تواصل اجتماعي مفيد ومهم جدا فهي من أهم مفاتيح القبول لدى الطرف الآخر
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