24th American World Dentistry Congress December 04-05, 2019 Vancouver, Canada

Rekha Kaur is doing one year compulsory rotatory internship at age of 24 years from Punjab Government Dental College and Hospital Amritsar , ( India) .She has done 8 Poster and 5 paper presentation during BDS course.

The Odontogenic Keratocyst (OKC) has gained very special attention due to its aggressive behavior and high recurrence rate. It has characteristic histopathological and clinical features.Many prior attempts have been made to classify these cyst from 1887 to 2017. WHO in 1971 and 1992 classified OKC under developmental odontogenic cyst of jaw. In 2005 WHO classification of head and neck pathology reclassified cyst to Keratocystyc Odontogenic tumor ( KCOT) because of gene mutations and loss of heterozygosity (LOH) of the hedgehog receptor PHCH1 plays an essential role in the Pathogenesis of KCOT. But In 2017 WHO reclassified OKC back into the cystic category . Despite of many classifications and nomenclature, unfortunately clinicians are still facing difficulties in understanding true nature , identification and management of OKC. Presence of Orthokeratin and parakeratin is considered to be of clinical significance. As it has been found that parakeratin variety has high recurrence rate as compared to orthokeratin. In this poster I am going to present and discuss various treatment modalities of OKC , depending upon size location and histopathological finding

Ideh Talimkhani has completed her doctorate of general dentistry from Hamadan University of medical science at the age of 24. At the age of 31 she became specialist in oral and maxillofacial surgery from same university. Now she is assistant professor in medical university of Kurdistan This research is the thesis topic of her doctorate of general dentistry that was supervised by Mohammad reza Jamal pour and was accepted in journal of oral and maxillofacial surgery in July 2019.

This study aims to evaluate the healing process of autografted mandibular bone defects in rats treated with zoledronate (ZOL). A total of 180 Wistar rats were divided into four groups: group L received intravenous infusion of two doses of 0.06 mg/kg ZOL, nine weeks apart; group H received 0.06 mg/kg ZOL, while groups C and NC received normal saline at three-week intervals for nine weeks. Three weeks following the last infusion, a unilateral mandibular bone defect (5 mm) was created. Except in the NC group, all defects were repaired with autologous iliac bone graft. Fifteen animals from each group were sacrificed on postoperative Day 20, Day 40, and Day 60. Graft healing was scored using a histological grading system (ranging from 1 to 6).Histological evaluations performed on postoperative Day 60 showed that the mandibular defects were mainly repaired with fibrous tissue in the NC and H groups (93.00% ± 7.51% and 82.67% ± 13.08%, respectively) and with bone in the C and L groups (75.33% ± 14.20% and 92.67% ± 8.84%, respectively). The percentage of fibrous tissue and bone as well as the healing score of the NC and H groups were significantly different (P = 0.001) from those of the C and L groups. However, these were not different between neither the NC and H groups nor the C and L groups.Based on the results of the present study the hypothesis can be established that there also might be a dose-dependent effect of ZOL on the healing of bone grafts in humans. This hypothesis has to be verified or rejected in clinical trials.

Ishraga Fourawi has completed her BDS in 1993 from Khartoum University College of dentistry. She is a head of infection control department in primary health care centre in burayadah and work in general directorate of health affairs in qassim province

Preventive Program for pregnant ladies: Oral health is essential to overall health. For expectant and new mothers, maintaining good oral health is crucially important not only for their teeth, but also the rest of their body. Medical researchers have only recently begun to understand the complexity of the relationship between poor oral health and its effects on other bodily systems. For example,

 

• Mounting evidence links poor oral health to cardiovascular disease

• Limit Foods containing sugar to mealtimes only

• Dental care is safe and effective during pregnancy

• Oral health

 

Pregnancy strains bodily systems, and the oral cavity is no exception. Hormonal changes are experience during pregnancy, combined with a build-up of plaque on the teeth, can lead to “pregnancy gingivitis” gum inflammation. Poor oral health in children affects far more than their appearance. The effects

 

• Including pain

• Nutritional problems

• Tooth loss,

• Sleep deprivation

 

The goals of the preventive program for pregnant ladies:

• Educate the pregnant women about the importance of her oral health, not only for her overall health,

but also for the oral health of her children and possibly to improve the outcome of her current pregnancy.

• Assess problems with teeth and gums.

The role of the dental staff:

• To educate the pregnant women the they should:

• Brush teeth twice daily with a fluoride toothpaste and floss daily.

• Obtain necessary dental treatment before delivery

• Avoid putting the child to bed with a bottle or sippy cup containing anything other than water.

 

Keywords: Space management, space maintainer, space loss, premature tooth loss

Ideh Talimkhani has completed her doctorate of general dentistry from Hamadan University of medical science at the age of 24. At the age of 31 she became specialist in oral and maxillofacial surgery from same university. Now she is assistant professor in medical university of Kurdistan This research is the thesis topic of her doctorate of general dentistry that was supervised by Mohammad reza Jamal pour and was accepted in journal of oral and maxillofacial surgery in July 2019.

Purpose: Surgical removal of impacted third molar teeth is one of the most common surgical procedure performed in oral and maxillofacial surgery. Postoperative pain is a common and predictable occurrence after maxillofacial surgery.

 

Materials and Methods: This randomized double-blind clinical trial was conducted with a crossover design in which each patient served as his or her own control. Forty-six patients with similar bilateral impacted lower third molars were selected. In each patient, the intervention and control sides of the mandible were randomly determined at the end of surgery. If the removed tooth was in the intervention side, then the patient would receive bupivacaine and a placebo of mefenamic acid. If the impacted tooth was in the control side, then the patient would receive a mefenamic acid capsule and a placebo of bupivacaine. Pain severity was assessed using a visual analog scale. Data were analyzed using paired-sample t test and a P

value less than .05 was considered statistically significant.

 

Results: Of 46 participants originally recruited, 43 were included in the present study. The mean postoperative pain score in patients who received bupivacaine was increased to a maximum 4 hours, with marked improvements after this time. The mean intensity of pain after administration of bupivacaine was lower than that of mefenamic acid capsules at different time points. Statistical analysis showed a relevant difference in pain intensity between the 2 study groups.

 

Conclusion: The results of the present study showed that local administration of bupivacaine relieves postoperative pain after surgical removal of impacted third molar teeth.

Primary teeth play a key role in the nutrition and speech of the children as well as space maintenance in the permanent teeth. If dental caries and trauma lead to tooth loss, space maintainers should be used to preserve the space of the primary teeth. Space maintainers vary depending on the child’s growth and development and the number and type of the lost teeth. In this study, the Google Scholar, Science Direct, PubMed, and Scopus databases were searched using the terms ‘space management’, ‘space maintainer’, space loss, and ‘premature tooth loss’ to completely review the space maintainers used in pediatric dentistry. There are numerous space maintainers for clinicians to choose from based on the developmental and dental conditions of the child, their preference, and patient’s ease.

 

Keywords: Space management, space maintainer, space loss, premature tooth loss .

Dana Jafarpur is a sixth year dental student at Shiraz University of Medical Sciences. Next semester she will be graduating summa cum laude from Shiraz Dental School and has written a book in forensic dentistry and published 5 papers during her undergraduate studies.

Objectives: To evaluate the effect of different Nano filled resin coatings on the staining susceptibility of glass ionomer restoratives after immersion in three food simulating solutions (FSS).

 

Methods: Five encapsulated glass-ionomer restoratives (Riva light-cure (SDI), Riva self-cure (SDI), Fuji II LC (GC), Fuji Bulk (GC) and Equia Forte Fil (GC)) and two Nano filled coatings (EQUIA Coat (GC) and G-Coat plus (GC)) were employed. All specimens were immersed in distilled water for 24 h and then subjected to a color measurement with a spectrophotometer. Then the samples were divided into three subgroups and immersed for another one week in lactic acid (0.1mol/L), coffee, and distilled water (control) respectively. The differences in the lightness and chromaticity values (ΔL, Δa, Δb) were determined and the total color change (ΔE) was calculated using the formula: ΔEn= [( ΔLn)2+( Δan)2 + ( Δbn)2]1/2.

Since the concept of Osseo integration was introduced by Brånemark et al, modern dental implants have been considered a safe and reliable option for replacing missing teeth. By placing dental implants abutment directly in in bone, considering different problems regarding its rejection, if every step is done by standard method the implant will be osseointegrated into the alveolar bone. Osseointegration depends on a multiple of factors such as implant material, surgical technique etc. The implant material mostly include titanium and its alloys (mostly Titanium alloys Ti6Al4V) zirconia or even fiber reinforced composite (FRC) which can be a potential material in near future. For past few decades titanium and its alloys have been the material of choice for dental implant’s abutment. However, titanium has been shown to exhibit a variety of problems. Because of the high modulus of elasticity of the titanium alloys, dental implants made from the material can cause stress-shielding which may lead to periodontal bone loss. Moreover few cases has been reported with induction of hypersensitivity to the titanium used as implant’s abutment also other problems such as Wear debris and ion leakage can also be of concern with titanium dental implants. There is various factor concerning the success or failure of a dental implant by the manner in which stresses are transferred to the surrounding bone. Load transfer from implants to surrounding bone depends on the type of loading, the bone–implant interface, the quantity and quality of the surrounding bone and etc. Finite element analysis (FEA) allows researchers to predict stress distribution in the contact area of the implants with cortical bone and around the implants in trabecular bone. The high-performance biomaterial PEEK (polyether ether ketone) has been applied as implant material in many fields of medicine since the 1990ies.Due to its excellent properties, a high stability and elasticity (elastic modulus: 3-4 GPa), low density (1,32 g/cm3) and insolubility its application have been boosted in the field of dentistry as for the manufacturing of prosthetic reconstructions. Its elastic modulus, similarly to that of cortical bone, it plays an important role as viable alternative to conventional implant materials such as titanium. This reduces the risk of stress shielding around the implant and makes it suitable for use even in orthopedic procedures and spinal surgery. The stable chemical structure of PEEK makes it extremely unreactive and inherently resistant to chemical and thermal degradation. The inertness of the polymer also explains its biocompatibility, which has been shown both in vitro and in vivo. In this review article we inspect the probable advantages of using the PEEK as a stress shielding material

in dental implant’s abutment.

Sara A. Swidan has completed her master’s degree in oral pathology from Suez Canal University in 2016. She is an assistant lecturer of oral Pathology at Faculty of dentistry, Suez Canal University, Ismailia, Egypt. Her research interest focused on the effect of phytochemicals and nano-drugs on prevention and treatment of chemically induced oral squamous cell carcinoma in animal models.

Objectives: To evaluate the effect of different Nano filled resin coatings on the staining susceptibility of glass ionomer restoratives after immersion in three food simulating solutions (FSS). 5-Fluorouracil (5-FU) is a common chemotherapeutic drug for treatment of oral cancer. However, its toxicity to normal tissues has limited its role as an effective cancer therapy. This research aimed to investigate the effect of combining 5-FU with honokiol (HNK) - a small natural organic molecule- on enhancing the anticancer activity of 5-FU without increasing its toxicity. Honokiol (HNK) was formulated in nano-capsules (HNK-NC) for better bioavailability, efficient penetration and sustained release. HNK-NC was used in combination with 5-FU for treatment of tongue carcinoma induced chemically by 4-nitroquinoline 1 oxide (4-NQO) in albino rats. Rats were divided into seven groups including control, 4-NQO, 5-FU, HNK, HNKNP, 5-FU with HNK, and 5-FU with HNK-NC. HNK-NC were successfully prepared using nanoprecipitation technique and transmission electron microscopy (TEM) was employed to evaluate the shape of the prepared capsules. The mean particle size was 93.93 ± 1.22 nm, with zeta potential of ±30.1 mV, and encapsulation efficiency of 99.2 ± 0.3%.. Assessment of serum levels of liver enzymes and creatinine was done to evaluate the safety of the used drugs. Serial sections of the tongues from all animals was examined microscopically and real-time PCR quantification of P53 gene expression was also assessed. The results showed that treatment with both 5-FU + HNK-NC had significantly retarded tumor growth, with a marked reduction in the systemic toxicity as compared to treatment with either drug individually. Data analysis revealed statistically significant differences (P < 0.05) in the expression levels of P53 between the combined treatment and control groups.

Nastaran Vaziri is a fifth year dental student at International Campus of Tehran University of Medical Sciences. She has published one article in an Iranian journal.

Pain control by local anesthesia plays a critical role in success of most dental treatments. Due to the unpleasant pain experience related to the use of the conventional syringe injection, some computerized techniques have been developed for local anesthetic injection. This study aimed to compare the pain score following infiltration anesthesia of the maxillary premolar teeth administered by the conventional syringe and automatic. This single-bind randomized clinical trial was performed on 35 patients whose average age was 38. Requiring bilateral extraction of maxillary premolars. The patients’ dental anxiety was scored and they received infiltration anesthesia with the iCT injection SE (Dentium, South Korea) at one side and conventional syringe at the contralateral side. The pain level was recorded during needle insertion, anesthetic delivery and 5 hours after the injection using visual analog scale (VAS) and the face rating scale (FRS). The data were subjected to Wilcoxon signed-rank test. Significant differences were found between the automatic and conventional methods regarding pain scores during needle insertion (P<0.01) and anesthetic delivery (P<0.0001) while no significant differences were noted at 5 hours after the injection. Pain scores were significantly lower during supra-periosteal injections in the maxillary premolar region using iCT injection. Both FRS and VAS in iCT injection showed that frequency of severe pain during needle insertion and anesthetic delivery was noticeably lower than that in conventional injection method but findings revealed that there was no significant difference between these two technics after 5 hours of injection.

Dentistry and specifically Periodontology is certainly one of the specialties that has been able to take advantage of new technologies and the digital revolution to support the field of scientific and medical research of which it is a major contributor. With this in mind, I tried to take advantage of the IT revolution by creating the computer tool PERIOSYSTEM. It brings together the revolutionary solutions in computer science, clinical research in Periodontology to facilitate its progress. Indeed, one of the major difficulties of clinical research (including large sample studies) is the time required for data collection, sorting and reporting in a statistically exploitable format, risk of errors due to re-transcription. In this sense, PERIOSYSTEM uses the following new technologies: Speech recognition: thanks to which the researcher can easily dictate and record the collected data independently.

 

Motion recognition: that allows to interact with the computer tool while preserving the asepsis (the user, can manipulate the computer without touching anything).

 

Facial Recognition: to recognize patients and facilitate practitioner / researcher-patient exchanges

The recognition of emotions: which allows for example to automatically collect some data such as pain.

Augmented reality: allows to project on reality a certain number of data selected in the patient file (like the sounding depths for example)

 

Virtual reality: which provides new communication tools with patients (motivation, explanations ...) Automated analysis of health data collected: allows patients to be sorted according to easily applicable inclusion and exclusion criteria (diabetic patients, smokers, pregnant women, cardiovascular history, etc.). The intelligent reading of X-rays, which through a gray-scale analysis, allows the application of radiographic selection criteria. From data collected, recorded and sorted, PERIOSYSTEM, allows their export in a statistically exploitable and analyzable format (EXCEL format, for example). IT is a field that is developing at a very dynamic pace and its advances have revolutionized all other sectors. As periodontists seeking to benefit from it is not only legitimate but also desirable in order to reinforce research and improve our practice in the interest of the patient and the practitioner. And I hope that through my presentation I will give many others faith in technology and the future for the best of our profession.