Do you want to publish a course? Click here

Effect Of Different Finishing and Polishing Procedures on Surface of Composite Restorations

تأثير طرق مختلفة للإنهاء و التلميع على سطح ترميمات الكمبوزيت

1925   0   76   0 ( 0 )
 Publication date 2016
  fields Dentistry
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The aim of the study is to evaluate the surface roughness of the resin Tetric N Ceram (Ivoclarvivadent ) after different finishing and polishing techniques. 50 specimens of (10×2) mm were made and distributed in 5 groups (N=10), According to the technique employed: First group G1: Tengustinecarbid burs, Second group G2: Astopol system, Third group G3: Stem discs, Fourth group G4: Tengustinecarbid burs then Astropol system, Fifth group G5: Tengustinecarbid burs then Stem discs. A coarse roughness diamond bur was applied , then applied a super fine diamond bur on all specimens of the study before starting any procedure of finishing and polishing. After finishing and polishing techniques, surface roughness )Ra μm( was measured using InfiniteFocus– Alicona. Data were subjected to Kruskal-Wallis and Mann-Whitney U test at 5% significance level.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى تقييم خشونة سطح راتنج Tetric N Ceram بعد تطبيق تقنيات مختلفة للإنهاء والتلميع. تم تصنيع 50 عينة من الراتنج وتوزيعها على خمس مجموعات، حيث تم تطبيق تقنيات إنهاء وتلميع مختلفة لكل مجموعة. أظهرت النتائج أن المجموعة الثانية (نظام Astropol) والمجموعة الخامسة (سنابل تنغستين كاربايد مع أقراص Stem) حققتا أقل مستوى من خشونة السطح، بينما حققت المجموعة الثالثة (أقراص Stem) أعلى مستوى من الخشونة. تم استخدام جهاز InfiniteFocus لقياس خشونة السطح، وأظهرت التحليلات الإحصائية وجود فروق معنوية بين المجموعات المختلفة. خلصت الدراسة إلى أن نظام Astropol ونظام سنابل تنغستين كاربايد مع أقراص Stem هما الأكثر فعالية في تحقيق سطح ناعم لترميمات الكمبوزيت.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة في مجال طب الأسنان التجميلي، حيث تقدم معلومات قيمة حول تأثير تقنيات الإنهاء والتلميع على خشونة سطح ترميمات الكمبوزيت. ومع ذلك، يمكن تحسين الدراسة من خلال تضمين عينات أكبر وزيادة تنوع المواد المستخدمة. كما يمكن أن تكون الدراسة أكثر شمولية إذا تم اختبار تأثير هذه التقنيات على متانة الترميمات على المدى الطويل. بالإضافة إلى ذلك، يمكن أن تكون الدراسة أكثر فائدة إذا تم تضمين تقييمات سريرية من قبل أطباء الأسنان والمراجعين المستقلين.
Questions related to the research
  1. ما هو الهدف الرئيسي من هذه الدراسة؟

    الهدف الرئيسي من الدراسة هو تقييم خشونة سطح راتنج Tetric N Ceram بعد تطبيق تقنيات مختلفة للإنهاء والتلميع.

  2. ما هي التقنيات التي تم اختبارها في هذه الدراسة؟

    تم اختبار خمس تقنيات مختلفة للإنهاء والتلميع، بما في ذلك نظام Astropol، سنابل تنغستين كاربايد، وأقراص Stem.

  3. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    توصلت الدراسة إلى أن نظام Astropol ونظام سنابل تنغستين كاربايد مع أقراص Stem حققا أقل مستوى من خشونة السطح، بينما حققت أقراص Stem أعلى مستوى من الخشونة.

  4. ما هي التوصيات التي قدمتها الدراسة بناءً على النتائج؟

    توصي الدراسة باستخدام نظام الإنهاء سنابل التنغستين كاربايد مع نظام الأقراص الساحلة في المنطقة الأمامية من الفم، ونظام الأقماع المطاطية في كل من المنطقتين الأمامية والخلفية.


References used
JUNG, M.; EICHELBERGER, K.; KLIMEK, J. Surface geometry of four nanofiller and one hybrid composite after One-step and multiple-step Polishing. Oper Dent, 2007, 347-55
MITRA, SB.; WU, D.; HOLMES, BN. An application of nanotechnology in advanceddental materials. J Am Dent Assoc. 2003, 1382-90
JUNG, M.; SEHR, K.; KLMEK, J. Surface texture of four nanofilled and one hybrid composite after finishing. Oper Dent 2007, 45-52
rate research

Read More

Aim: to compare the effect of multiple usage and surface coarseness of diamond burs on marginal microleakage of cervical resin composite restorations. Materials and methods: sixty extracted premolars without caries were chosen. The sample was rand omly divided into three groups: n1=n2=n3=20. Group(1): class v cavities were prepared using super coarse diamond burs, group(2): prepared by coarse diamond burs, whereas group)3(: prepared by medium coarse diamond burs. All cavities were restored by resin composite, then The teeth were thermocycled and immersedIn5%solution of methylene blue dye for 12hours.Then the teeth were sectioned vertically, Dye penetration was evaluated using a 10X stereomicroscope at the occlusal and gingival margins. Data were collected and statistical analysis was conducted. Results: The results showed that the multiple use of super coarse diamond burs caused no significantly statistically affect on occlusal and gingival microleakage (P>0.05). However, the multiple use of coarse and medium diamond burs caused significantly statistically affect on gingival marginal microleakage (P<0.05).
Resin based composite considers substantially as a restorative material in clinic. Dentists concern in placement resin composite restorations with Long term survival. Materials and Methods: 20 Non carious human third molars, class I cavity was pr epared in every molar, restored with methacrylate resin composite Tetric EvoCeram. The restored teeth were subjected to thermocycles. Specimen was randomly divided into two groups : the first group 10 restorations, were repaired by Cojet® (3M ESPE, Germany) and restored by Filtek™ P90, the second group 10 restorations also repaired by Cojet ® but restored by Filtek™ Z350 XT. After that all teeth were subjected to thermocycles again, later immersed in 0.5% basic fuchsin solution for 1 s. The teeth were transversely sectioned and observed under a stereomicroscope. The degree of dye penetration was recorded and analyzed. Results: No statistically significant differences in microleakage were observed between two groups either with low shrinkage Silorane resin composite or methacrylate resin composite
The elapsed time is considered as an essential factor when some procedures are required on resin composite restorations like repairing, etc.., and the question is whether this factor is going to effect on using silorane resin composite. Twenty sil orane based resin composite blocks were prepared (8×8×4)mm, randomly assigned into two groups: the first group 10 blocks, half of each resin block was removed by diamond burs after thermocycles, the second group 10 blocks also half of each resin block was removed by diamond burs after fabrication. All Interfacial surfaces were conditioned by (Cojet™, 3M ESPE). Blocks were restored with silorane resin composite and subjected to thermocycles. Microleakage observed under a stereomicroscope after blocks were immersed in 0.5% basic fuchsin solution for 10 s, and transversely sectioned. Mann-Whitney U test found no statistically significant differences in microleakage between two groups either with fresh silorane resin composite group or aged silorane resin composite group.
The phenomenon of impact between the adjacent buildings is one of the most important reasons for collapse of buildings during the earthquakes for that most of the codes resort to avoid impact by increasing the distance between adjacent buildings, b ut on the other hand high cost of land requires us to take advantage of the largest possible area in addition to the difficulty of making the separation architecturally and in particularly for high buildings the separation may offer up to 50 cm. We tried to have this research one of the studies that discuss the subject of seismic pounding where we discussed the methods for modeling the pounding and the most appropriate way to study the impact depending on the program dynamic analysis Ansys (Autodyn Ver. 11) then chose several cases for study seismic impact in three-dimensional models to cover most of the study variables that may affect this phenomenon, and we doer non- linear dynamic analysis for all cases, with applying acceleration function is defined by equation its constants are changing with processing the seismic records data. After finishing the analysis for all the models we have discussed changing the transitions and stresses and strains , and studied the factors affecting the impact , and discussed results of study and then we have summarizes the recommendations in that we see fit through this search.
Background and Aim : Retention between composite and fiber post is still below the acceptable level when compared with the retention between composite and dental structure. This study aimed to evaluate the effect of H2O2 as a chemical solution to imp rove the mechanical connection between fiber post and composite core. Materials and Methods:45 glass fiber posts and 45 quartz fiber posts were prepared. The specimens were randomly distributed into 3 subgroups, including application of silane (S) , etching with H2O2 10% for 20 minutes(H1) , etching with H2O2 20% for 10 minutes (H2). composite core was placed. Shear bond strength values of posts and composite resin cores were measured using a mechanical test machine (Instron). data were analyzed Statistically . Results :There were significant differences between the shear bond strength for (H1,H2) And (S) in quartz groups only (P<0.05). There was no significant difference between glass and quartz groups (P>0.05). Conclusions:The surface treatment of quartz fiber posts with H2O2 significantly enhanced the shear bond strength of the composite core. Application of H2O2 to the Glass fiber post surfaces was not effective.

suggested questions

comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا