Safa’a Al-Sayed Asal has completed her PhD from Tanta University and Postdoctoral research from King Saud University, College of Dentistry. She is an Assistant Professor of Prosthodontics and Implantology and Director of Infection Control Unit at Tanta Dental College. She has published more than 20 papers in reputed journals.

Aim & Objectives: Th is study was conducted to determine the distance between the mesioincisal angles of maxillary central incisors along the midline to a line running between the tips of the maxillary canines (IC line) in Arab population with diff erent arch forms. Materials & Methods: 226 stone casts for selected dentate Saudi students were categorized into three groups according to the arch form (ovoid, tapering and square). Using a digital caliper, the distance between the mesioincisal angles of the maxillary central incisors along the midline to the (IC) line was measured .Th e data was collected and statistically analyzed. Results: Th e mean distance measured from the mesioincisal angles of the maxillary central incisors, along the midline, to the (IC line) showed statistical signifi cant diff erence among the various arch forms. Conclusion: Th e fundamental results of this study can serve as a guide for determining the mesiodistal width of the maxillary anterior teeth in diff erent arch forms.

Ricardo Wathson Feitosa de Carvalho is Specialist, MSc and PhD and Doctor in Oral and Maxillofacial Surgery Postgraduate in Implantology from University of Pernambuco, Brazil

The aim of the present study was to structure and validate an index of the level of surgical difficulty in the removal of impacted lower third molars. The design of this study followed two steps. In the first, a cross-sectional analysis of patients submitted to at least one surgical removal of a lower third molar was carried out within a four-year period-seeking the structuring of an index-after analysis of demographic radiographic clinical variables. In a second step, a prospective cohort study was performed, involving patients submitted to the same surgical procedures–cross-referencing the level of difficulty determined with the use of the index in the preoperative phase, and the level of difficulty determined in the trans-operative phase–in order to verify the validation of the use of the created index. From a total of 1,033 surgical procedures, 753 were analyzed in the first stage, identifying the most important variables and demonstrating the level of significance of each. The applicability of the index was performed in 280 surgical procedures. In cases with low difficulty, 93.1% were evaluated as low difficulty, according to the index. And in cases with high difficulty, difficulty was registered at a rate of 87.9%, according to the classification of the index. It was possible to structure a measurement index of the level of surgical difficulty in the removal of impacted lower third molars, which proved to be a reliable instrument to predict difficulty, demonstrating high sensitivity, specificity and accuracy.

Carlos Eduardo Datte is pursuing his PhD since 2015 at São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos. He is the Professor of Oral Surgery at São Leopoldo Mandic University.

Actually it is necessary to study what would be the best restorative materials when a tooth has been lost. Faults can occur and lead to even loss of the implants, after the installation of the restorative material. The aim of this study was to analyze the stress generated in dental implants with different crown materials under axial forces, using finite element analysis and strain gauge. For finite element analysis (FEA)–a model of implant morse conical 3.5X10 mm and an abutment of 4.5X4.0X4.5 mm was created (Rhinoceros CAD software). The implant was inserted 2 mm intra-osseous having cortical bone thickness of 1.5 mm. The geometry was exported to ANSYS CAE program in STEP format. The implant was subjected to a just loading condition compression at 200 N in cobalt chromium, monolithic zirconia, Enamic and disilicate crowns. In a second moment, for validation of mathematical model, the strain gauges analysis was made in the same conditions, for one representative crown (cobalt chromium crown). After the correlation of the two methods and validated of the FEA the results were analyzed by Von-Misses criteria. Among the limitations of this study, it is suggested that association of Enamic crown with titanium abutment generated lower stress on abutment. There was no difference in micro strain generated in the crestal bone area independent of material used in crowns and abutments.

Dr. Ruchita Shah Mph Candidate University Of North Texas Health Science Center

Periodontitis is an infection which is caused by plaque and bacteria accumulating below the gums. If left untreated, it can destroy gums and bone, resulting in loss of teeth. While poor dental hygiene plays a role in the development of periodontal disease, poor nutrition also can be a factor. As dental professionals become increasingly aware of the association between systemic and oral health, the importance of addressing systemic nutrition issue takes on a new urgency. Nutrition is one of the modifiable factors that impact host’s immune response and the integrity of hard and soft tissues of oral cavity.

Chantelle van Graan completed her BChD degree in 2008 at the University of the Western Cape. She completed a year of compulsory community service as a General Dentist at the South African National Defence Force base in Heidelberg, Gauteng, South Africa. In 2010, she joined an established private practice in Heidelberg where she became co-owner of the practice in late 2010. She was responsible for the practice refurbishing and management whilst continuing her studies at the University of Pretoria, South Africa in the field of Implantology. In 2013, she joined a private practice in Alberton, Gauteng, South Africa. She completed her Certificate in Implantology at the University of Pretoria in 2013. She then continued in her field of implantology by enrolling in the Post-graduate Diploma in Implantology Program at the University of Pretoria under mentor Prof. Andre van Zyl, Department of Oral Medicine and Periodontology. In 2014, she completed two Post-graduate subjects, Anatomy and Physiology. She was recruited by a private practice in Secunda, Mpumalanga towards the end of 2013. In 2015, she completed her Post-graduate Diploma in Implantology at the University of Pretoria. She is currently in private practice at Dedekind Dental in Secunda, Mpumalanga, South Africa. She is winner of the 2016 International Team of Implantology, South Africa National congress poster presentations.

Implant placement in the anterior maxilla remains a challenge to even the most experienced clinician. Immediate implant placement is a risky procedure in itself. To combine these to modalities is expected to have a variety of complications and possible negative outcome. Due to the pressure of patients’ lifestyles and time constricting careers, there is an increase in the demand for combined procedures. Thanks to the advances in the research and availability of dental implantology, it is possible for us clinicians to achieve favorable outcomes when adhering to the principles and techniques available. This poster presentation is representative of such instance, when following the correct guidelines; a successful outcome is made possible. A thorough clinical case presentation presents the basic guidelines in photo collage format with the relevant steps to show the beginning, intermediate and final stages of an immediate implant in the anterior maxilla.

Mousa Abdelmalek Tourky has completed his PhD from Al Azhar University, Cairo, Egypt on 2009, in addition to a Diploma in Oral Surgery from the same university in 1990. He worked at the Faculty of Oral and Dental Medicine, Al Azhar University, Cairo, Egypt. He is currently working is an Assistant Professor of Pediatric Dentistry at the college of Dentistry, Taibah University, KSA. He has published more than 8 papers in reputed journals. He is offering courses also for undergraduate dental students in Ethics of Dental Practice in addition to Dental Public Health.

The use of atmospheric pressure cold plasma takes into account to be used as sterilizer for several species of bacteria. The main objective the study is to investigate the efficiency of atmospheric pressure cold plasma as an inactivation technique to the cariogenic bacteria. Saliva samples (4 ml) from children aged 9-12 years were collected at two intervals, one at early morning and after 2 hrs after chewing sugar free gums. Bacteria were isolated in petri dishes containing nutrient agar medium and were incubated at 37°C for 24-48 hours. The grown bacterial colonies were counted and multiplied by reverse of dilution to count the bacterial number per ml. The treated samples were exposed to plasma jet placed at 1.5 cm distance above the samples for 2 min. The bacterial colonies were counted again in the same manner as described above. The total bacterial count before gumming was more than the bacterial count after gumming in both the sexes. In boys, the bacterial count before gumming ranged from <10 to 5000 CFU/ml while in girls it reached up to 18400 CFU/ml. The bacterial colony treated with atmospheric pressure air cold plasma jet led to 86.7% to 98.0% drop in bacterial count as listed in the representative saliva samples. Results demonstrated the efficiency of cold plasma jet as bacterial decontaminating agent. Therefore, air cold plasma jet is a promising technique to reduce cariogenic bacteria which can initiate and promote dental caries.