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Coimbra Vienna
INTRODUCTION Root resorption Pulp Capping Furcal repair Root end filling Repair of root perforation Apexification Parirokh M, Torabinejad M. Mineral trioxide aggregate: a comprehensive literature review Part I: chemical, physical, and antibacterial properties. Journal of endodontics. 2010;36(1):16-27.
INTRODUCTION New Materials To improve MTA drawbacks Parirokh M, Torabinejad M. Mineral trioxide aggregate: a comprehensive literature review Part III: clinical applications, drawbacks, and mechanisms of action. Journal of endodontics. 2010;36(1):400-13.
MATERIALS & METHODS GMTA WMTA
MATERIALS & METHODS X X X X X X X X X X X X X X
MATERIALS & METHODS
MATERIALS & METHODS CRITERIA 1. Extracted by periodontal reasons 2. No carious lesion 3. Single Rooted Teeth 4. Fully developed apexes 5. One Straight Root Canal
117 TEETH
MATERIALS & METHODS OBJECTIVE Standardization of root sample sizes 16mm 1000 rpm Wa t e r c o o l e d d i a m o n d s a w Progression: 0.5mm per second
BIOMECHANICAL PREPARATION STEP BY STEP NaOCl # 10 NaOCl NaOCl NaOCl # 15 # 20 # 25 NaOCl # 30 WORKING LENGHT - 15 MM
BIOMECHANICAL PREPARATION STEP BY STEP GG1 NaOCl PATENCY FILE GG2 NaOCl PATENCY FILE GG3 NaOCl PATENCY FILE GG4 NaOCl PATENCY FILE GG5 NaOCl PATENCY FILE WORKING LENGHT - 15 MM
MATERIALS & METHODS GROUP 1 ProRoot MTA n = 39 GROUP 2 Biodentine n = 39 GROUP 3 MM-MTA n = 39
FINAL IRRIGATION PROTOCOL SUBGROUP A SUBGROUP B SUBGROUP C PBS BLOOD Butyric Acid 3mL of 3mL Butyric of NaOCl Acid - 2.5% - ph = 5
armamentarium FOR ROOT FILLING Paper Points Condensation and Wall Cleaning Dry of root canal system MTA GUN Placement of material MicroBrush Condensation and Wall Cleaning Pluggers Condensation and MTA Placement
armamentarium FOR ROOT FILLING Paper Points Condensation and Wall Cleaning Dry of root canal system MTA GUN Placement of material MicroBrush Condensation and Wall Cleaning Pluggers Condensation and MTA Placement
armamentarium FOR ROOT FILLING Surgical Microscope Improve your vision Paper Points Condensation and Wall Cleaning Dry of root canal system tested MATERIALS Mixer and Spatula Preparation of material
MATERIALS & METHODS SUBGROUP A SUBGROUP B SUBGROUP C PBS BLOOD Butyric Acid Placement Condensation of blood root with canal in a root plugger sealers canal
MATERIALS & METHODS Subgroups A and B 15 ml of PBS Subgroup C 15 ml of Butyric acid
MATERIALS & METHODS 1 2 3 4 5 6 7 8 9 10 DAYS LATER 37 º C 100% of relative humidity
MATERIALS & METHODS 351 ROOT SLICES Average size 2,003 ± 0,157
LET S RESUME 117 TEETH GROUP 1 ProRoot MTA GROUP 2 Biodentine GROUP 3 MM-MTA n = 39 teeth 1A. PBS 2A. PBS 3A. PBS 1B. Blood 2B. Blood 3B. Blood n = 351 root slices 1C. Butyric acid 2C. Butyric acid 3C. Butyric acid
MATERIALS & METHODS CROSSHEAD SPEED: 0.5mm Per Minute Chen WP, Chen YY, Huang SH, Lin CP. Limitations of push-out test in bond strength measurement. Journal of endodontics. 2013;39(2):283-7.
RESULTS By Material Two-way analysis of variance (ANOVA) Statistically significant difference was found between the 3 groups (F=155.972, p <0.001)
RESULTS By Material Mann-Withney test followed by Tukey's Test for pairwise comparisons Statistically significant difference was found between all groups when analyzed two by two (p <0.001)
RESULTS Setting Environment Two-way analysis of variance (ANOVA) Statistically significant differences Bond Strenght Values [MPa] (F=3.512, p=0.031) Mann-Withney test with correction for pairwise comparisons - Tukey's Test Butyric Acid PBS VS VS Blood Blood PBS Blood Butyric Acid PBS VS Butyric Acid
RESULTS Material and Setting Environment Bond Strenght Values [MPa] PBS Blood Butyric Acid
RESULTS Material and Setting Environment Bond Strenght Values [MPa] PBS Blood Butyric Acid
RESULTS Sample Location Root canal thirds Mean values Coronal Third 7.435 ± 4.931 Middle Third 6.133 ± 4.790 Apical Third 5.929 ± 4.889 Only statistically significant differences were found between apical and coronal third
RESULTS Sample Location Root canal thirds Mean values Coronal Third 7.435 ± 4.931 Middle Third 6.133 ± 4.790 Apical Third 5.929 ± 4.889 Only statistically significant differences were found between apical and coronal third
RESULTS Sample Location Root canal thirds Mean values Coronal Third 7.435 ± 4.931 Middle Third 6.133 ± 4.790 Apical Third 5.929 ± 4.889 Only statistically significant differences were found between apical and coronal third
FAILURE MODES ALL SAMPLES MIXED 34 samples 9.6% MIXED 82.1% ADHESIVE COHESIVE Within the filling material 29 samples 8.3% COHESIVE Between the filling material and dentin interface 288 samples ADHESIVE
RESULTS FAILURE FAILURE MODES MODES MIXED COHESIVE ADHESIVE Material VS Type of failure Setting environment VS Type of failure
DISCUSSION This studies are in accordance with our results
DISCUSSION???
DISCUSSION Statistically significant differences The interaction of MTA/dentine with PBS positively influenced the bond strength of MTA So, why not place PBS on contact with MTA instead of a moisted cotton pellet?
DISCUSSION In our study Statistically significant difference was found between apical and coronal third WHY? Perhaps Variations of tubules density along root canal Removal of smear layer Placement of materials in apical third is more difficult
DISCUSSION LOW PH Affects hydration of silicate based materials Surface alterations
DISCUSSION Lower ph values have effect on MTA
DISCUSSION
DISCUSSION
DISCUSSION Higher bond strength of BD WHY? Differences between the composition of two materials
DISCUSSION Radiopacifier influences material bond strenght
DISCUSSION Decrease bond strength
DISCUSSION The only study That evaluate MM-MTA bond-strenght
DISCUSSION The only study That evaluate MM-MTA bond-strenght Data is not consistent with our study Detailed evaluation of material components More research is required
CONCLUSION Under the conditions of this study Biodentine than ProRoot MTA Biodentine rather than ProRoot MTA in acidic environment Blood bond-strength
INFLUENCE OF SETTING ENVIRONMENT ON THE BOND STRENGTH OF THREE CALCIUM SILICATE-BASED MATERIALS TO ROOT DENTIN THANK YOU.. DANKE SCHON OLAVO GUERREIRO VIEGAS DIANA SERRA; PAULO PALMA; MIGUEL PATRÍCIO; JOSÉ DOMINGOS COSTA; JOÃO MIGUEL DOS SANTOS DMD, MSc, FACULTY OF MEDICINE, COIMBRA, PORTUGAL
INFLUENCE OF SETTING ENVIRONMENT ON THE BOND STRENGTH OF THREE CALCIUM SILICATE-BASED MATERIALS TO ROOT DENTIN Vienna, Austria 4-6 December 2014