Amir Saad Thesis final revision 03x - IUPUI

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dispensed in a mixing well using the manufacturer’s supplied applicator brush and 22 paper points (Henry Schein, Melville, NY) to length. Paper points were used to wick the primer to the apex and the excess primer was removed using dry paper points. RealSeal sealer was dispensed onto a mixing pad and then applied along the entire length of the canal. When obturation was complete, the RealSeal obturation material was light cured in the chamber for 80 seconds, which created an immediate coronal seal. The RealSeal sealer had set in the remainder of the canal for approximately 45 minutes to create a monoblock. POST SPACE PREPARATION Post space preparation for all teeth was initiated after 7 days from obturation 113 by the use of a universal starter drill included in the PeerlessPost Intro- kit (SybronEndo, Orange, CA) at a speed of 5000 rpm to a depth creating a 9-mm post space. The canals were rinsed with Peridex (chlorhexidine gluconate 0.12-percent oral rinse; Omni Preventive Care, 3M ESPE, West Palm Beach, FL) and dried with paper points (Henry Schein, Melville, NY). GROUP CP POST PREPARATION For group CP, post space preparation was established using Profile O.S. Orifice Opener (Dentsply, York, PA) size 20 through size 60 to the full 9-mm post space length. The size of the post space was 0.9 mm and 1.4 mm at the apical end and the orifice opening, respectively. An anti-rotational box was created on the lingual surface. Duralay (Reliance Dental Manufacturing, Worth, IL) patterns for casting were prepared according to the manufacturer’s instructions, supported by prefabricated plastic posts of 23 mm in length after thinning the apical end for a complete fit in the canal post space. The tooth length from root apex to incisal edge
will be 21.5 mm. Posts and cores were invested in Beauty-Cast (Whip Mix Corp., Louisville, KY) without a ring liner. The distilled water added to the investment powder was 17 ml (2 ml more than the recommended value by the manufacturer to allow a more precise passive fit in the prepared root canal). After casting, each post was trial fit to verify that it would seat passively. All cast post and cores were cemented using zinc phosphate cement (Mizzy Inc., Cherry Hill, NJ). GROUP FR POST PREPARATION 23 For group FR, PeerlessPost (SybronEndo; Orange, CA) size # 3 post with a 0.04 taper was used. The post space was prepared using the drill supplied in the starter kit for post preparation. The glass fiber post was shortened 1 mm from the coronal end and 1 mm from the apical end and then rechamfered to the original shape. The apical size of the post space was 0.9 mm and the orifice opening was 1.4 mm in diameter. An anti-rotational box was created on the lingual surface. The posts were cemented using ParaCem Universal DC (Coltene Whaledent, Cuyahoga Falls, OH) according to the manufacturer’s instructions. GROUP MR POST PREPARATION For group MR, ParaPost XH (Coltene/Whaledent, Cuyahoga Falls, OH) size # 3 was used with the drill supplied with it in the starter kit for post preparation. The post space preparation was 9 mm in length with parallel sides according to the manufacturer’s instructions. The apical end and orifice opening of the post space were 0.9 mm in diameter. An anti-rotational box was created on the lingual surface. All titanium posts were shortened by 2 mm from the apical end and then rechamfered to the original shape. All titanium posts were cemented using zinc phosphate cement (Mizzy Inc., Cherry Hill, NJ).
Page 1 and 2: EVALUATION OF FRACTURE RESISTANCE O
Page 3 and 4: iii DEDICATION
Page 5 and 6: v ACKNOWLEDGMENTS
Page 7 and 8: vii Prosthodontics department lab,
Page 9 and 10: Introduction…………………
Page 11 and 12: TABLE I TABLE II TABLE III TABLE IV
Page 13 and 14: 1 INTRODUCTION
Page 15 and 16: 3 Fiber posts with a more natural c
Page 17 and 18: HISTORY 5 Root canal treatment date
Page 19 and 20: 7 Although vital dentin is 3.5-perc
Page 21 and 22: ROOT LENGTH 9 Root length plays a s
Page 23 and 24: POSTS 11 The main purpose of a post
Page 25 and 26: 13 philosophies in treating nonvita
Page 27 and 28: evaluated various prefabricated pos
Page 29 and 30: 17 posts 151-153 such as ceramic po
Page 31 and 32: 19 MATERIALS AND METHODS
Page 33: 21 axis of each tooth at a speed of
Page 37 and 38: expansion. 165, 166 The lingual thi
Page 39 and 40: LOAD TO FAILURE 27 For each group,
Page 41 and 42: 29 RESULTS
Page 43 and 44: MOMENT OF INERTIA AT FRACTURE SITE
Page 45 and 46: 33 µm) minimum facial marginal gap
Page 47 and 48: 35 FATIGUE LOADING - FACIAL AND LIN
Page 49 and 50: 37 TABLES AND FIGURES
Page 51 and 52: 39 TABLE II Type of post systems, n
Page 53 and 54: 41 TABLE IV Moment of inertia (mm 4
Page 55 and 56: 43 TABLE VI Lingual marginal gap (
Page 57 and 58: 9.5 mm 2 mm 9 mm 5 mm 1 mm FIGURE 1
Page 63 and 64: Direction of force 51 45° Cross he
Page 65 and 66: 53 Marginal gap opening FIGURE 9. F
Page 67 and 68: 55 FIGURE 11. Template for teeth re
Page 69 and 70: 57 FIGURE 13. MTS Bionix 858 Test S
Page 71 and 72: 59 FIGURE 15. MTS Bionix 858 Test S
Page 73 and 74: 61 FIGURE 17. Specimen #29 demonstr
Page 75 and 76: 63 FIGURE 19. Load-to-failure sampl
Page 77 and 78: 65 DISCUSSION
Page 79 and 80: 67 post and cores yielded the best
Page 81 and 82: TITANIUM POSTS 69 All fractures obs
Page 83 and 84: 71 types of leakage seen were eithe
Page 85 and 86:
core technique, because it demonstr
Page 87 and 88:
75 There was no significant differe
Page 89 and 90:
1. Ring, ME. Dentistry, an illustra
Page 91 and 92:
30. Jemt T, Chai J, Harnett J, et a
Page 93 and 94:
57. Chupein TF. Pennsylvania associ
Page 95 and 96:
83 87. Asmussen E, Peutzfeldt A, He
Page 97 and 98:
115. Camp LR, Todd MJ. The effect o
Page 99 and 100:
146. Pilo R, Cardash HS, Baharav H,
Page 101 and 102:
176. Lambrechts P, Vuylsteke, M, Va
Page 103 and 104:
91 APPENDIXES
Page 105 and 106:
93 APPENDIX II Group FR individual
Page 107 and 108:
95 APPENDIX IV Individual load-to-f
Page 109 and 110:
97 APPENDIX VI Group FR moment of i
Page 111 and 112:
99 ABSTRACT
Page 113 and 114:
101 All teeth were obturated and pr
Page 115 and 116:
CURRICULUM VITAE
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