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 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 pl
aque 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.
يعد تجميل الأسنان أحد أهم الاجراءات الحديثة التي تحدث اثارا نفسية إيجابية تحسن من الصورة الذاتية للمريض وتمثل بعداً جديداً للمعالجة السنية
إن اسمى تعبير حقيقي عن مشاعر الانسان العفوية هي تلك الابتسامة فإذا كانت الابتسامة جميلة فإنها تحقق غايتها في الاتصال والتواصل ومن هنا كانت المحافظة على جمال هذه الابتسامة ضرورة ملحة تستدعي بذلك الكثير من الجهد والتعب
