031.Microleakage of iluorinatcd experimental dentin bonding agents for composite resin restorations

DR. SALMA A. BAHANNAN
King Abdulaziz University, Jeddah, Saudi Arabia

The durability of a restoration is largely based on maintenance of the tooth/ restoration interface which may lead to marginal integrity breakdown, microleakage, and staining and secondary caries. The purpose of this study was to determine if fluorinated dental bonding resins will reduce composite resin marginal microleakage. Light-cure filled (F) and unfilled (U) bonding resins were prepared from a basis resin of 45% bis-EMA, 40% TEGDMA, and 15% HEMA. Fluorinated TEGDMA (f), 0-30 wt% was substituted for some TEGDMA as shown in the table. Class V restorations were made in 50 extracted human molar teeth, 3 mm length X 2 mm width X 1.5 mm depth centered on the cementoenamel junction using these 8 experimental formulations and 2 commercial bonding resins (n = 5), OptiBond Solo Plus (OB, Kerr) and All-Bond 2 (AB, Bisco) following a standard clinical protocol. The teeth were thermocycled 1500 times between 5 °C and 55 °C wirh 1-minute dwell times. Teeth were removed, dried, varnished, and placed in 50 w/v% silver nitrate solution at 37 °C for 24 hours in total darkness. The teeth were rinsed and sectioned through the restorations with a wafering saw yielding haves. For each half, dye penetration was assessed at X80 and measured in mm from margin to axial wall for occlusal (O) and cervical (C) margins. Mean depths of dye penetration will be presented in a table. The data was analyzed statistically (P<0.05) using ANOVA. At the occlusal margins, all Rl, OB, and AB leaked significantly less than the fluorinated composite resins. At the cervical margins, OB and AB leaked significantly less than all other groups. Fluorinated TEGDMA did not reduce microleakage of composite resins.
Saudi Dental Journal 2006;18(SI)-Abstr.031

032.The trap of high-tech endodontics

PROF. ELIAS M. MAALOUF
School of Dental Medicine, Saint Joseph University, Beirut, Lebanon

From access cavity to root-canal filling, all aspects of the endodontic treatment have been subjected to improvement during the past decade as enhanced electronics circuitry, Advanced metallurgic processing and the new state-of-the-art biomaterials bloomed. The advent of such technology was (and still is) of course conveyed with harsh and relentless marketing campaigns that often mislead the unsuspecting practitioner into forgetting the basic endodontic principles that in turn jeopardize the medium or long-term prognosis of our endodontic treatments. This presentation sheds light on the booby-traps of so-called "high-tech" devices, instruments and products, and puts them back into perspective of the endodontic philosophy.
Saudi Dental Journal 2006;18(SI)-Abstr.032

033.Endodontics - What we are missing?

DR. SAAD A. AL-NAZHAN
  College of Dentistry, King Saud University,Riyadh, Saudi Arabia.

 
In the last 15 years several products has been introduced in the markets claiming that these products are excellent and will improve the outcome of the root canal therapy. The salesman of these products acts as an Endodontist where he shows the products as a miracle that will solve all the problems of the procedure. Of course these products did help the dentist in a way that makes him/her to forget (missed) the basics of root canal therapy. This issue will be discussed in this presentation.
Saudi Dental Journal 2006;18(SI)-Abstr.033

DR. CHARBELALLAM

Department of Endodontics, School of Dental Medicine, Saint Joseph University, Beirut, Lebanon

Extracting a tooth and replacing it with an implant or trying to save an existing natural tooth? Implantology and endodontic surgery are two highly evolving procedures in terms of instrumentation, used material and surgery procedure. But which one should be chosen, when and how? Does the choice depend on the success rate of the procedure or would the clinical case itself determine the treatment plan? In addition, two factors are worth considering: the mental state of the patient who is preserving his/her natural teeth and his/her financial situation. The aim of this presentation is to make a differential diagnosis and to select the cases to be treated. Both procedures will be detailed according to the selected cases.
Saudi Dental Journal 2006;18(SI)-Abstr.034

DR. ABED YAKAN
University of Aleppo, Alleppo, Syria

This lecture discusses the destructive lesions in the jaws which includes periapical and periodontal lesions, cystic lesions, benign and malignant tumors as ameloblastoma, central giant cell granuloma, peripheral and central hemangioma, desmoid fibromatosis, squamous cell carcinoma (S.C.C.), fibrosarcoma.

To our knowledge, its occurrences in the jaws are common. Several cases of patients suffering from bony destructive lesions in the jaws clinically, radiologically, histologically, its differential diagnosis, management and prognosis are discussed in this presentation.
Saudi Dental Journal 2006;18(SI)-Abstr.035