Ministry of Interior Security Forces Medical Services, Saudi Arabia
Introduction: Tooth extraction is usually followed by partial resorption of the residual alveolar ridge. Different techniques such as ridge preservation procedure has been proposed to maintain the ridge dimension. However, applying these methods to extraction sockets could not completely preserve the coronal part of facial bone walls, which were comprised almost entirely of bundle bone.
Case Report: A 45-year-old woman with non-contributory medical history presented to our clinic with non-restorable tooth #23, which doesnʼt has any periapical or periodontal pathology. After clinical and radiographical assessment, computed tomography (CBCT), indicated insufficient width of buccal bone plate therefore socket shield technique was planned for simultaneous immediate implant placement (Straumann 4.1x12 RN) with immediate provisionalization crown.
Initial follow up after two weeks, then after 2 monthʼs final restoration by screw retained crown inserted. After 6 and 12 months of loading follow up by using CBTC, for evaluation bone remodeling and clinical evaluation of soft tissue changes around implants.
Results: Two weeks follow up revealed the healing was uneventful, and after 6 and 12 months the clinical and (CBCT) revealed, that retaining root fragment adjacent to the buccal crestal bone and placing an implant engaged to the palatal socket wall immediately are able to maintain the contour of the ridge.
And the implant can achieve osseointegration without any inflammation at peri-implant tissue and also soft tissue contour preserved.
Conclusion: After one year follow up, SST can prevent soft and hard tissue changes can be happens during healing of alveolar socket after tooth extraction. However the using SST as routine clinical practice stile need to higher level of evidence.
Biography:
Dr. Hassan H Koshak completed BDS, AEGD, MSD, SP-Board, and SFDI. Hassan work experience consultant in Periodontics and Implant Dentistry. He is Head of the Dental Department and Dental Educator at Comprehensive Specialized Polyclinic, Ministry of Interior Security Forces Medical Services, Jeddah, and Kingdom of Saudi Arabia.
Seoul National University, Korea
I. Objectives: To investigate the effect of pulse width modulated (PWM) LED curing light on the polymerization shrinkage stress of composite.
II. Materials and Methods: A PWM-LED curing light system was made. The polymerization shrinkage stress of a bulk-fill composite (Bulk Fill Posterior (BFP), 3M ESPE) was measured (Bio-Stress, IB SYSTEMS) with varying duty ratios of PWM pulse and cure times (10 % / 100 s, 30 % / 33.3 s, 50 % / 20 s, 100 % / 10 s, Increase (0 → 100 % / 20 s), and Decrease (100 → 0 % / 20 s) at 50 Hz)(n=5). The total irradiant energy of each group was constant. Peak shrinkage stress rate and the time at peak shrinkage stress rate were also determined. Data were statistically analyzed using ANOVA and Turkeyʼs post-hoc test at α=0.05.
III. Results: The polymerization shrinkage stress and peak shrinkage stress rate were increased, and the time at peak shrinkage stress rate was decreased with increasing the duty ratio (p<0.05). In the Increase (0 → 100 %) group, the polymerization shrinkage stress was similar to the group with the duty ratio of 50 % (p>0.05), and the time at peak shrinkage rate was most delayed (p<0.05). In the Decrease (100 → 0 %) group, the polymerization shrinkage stress was similar to the group with the duty ratio of 100 % (p>0.05).
IV. Conclusion: The PWM-LED light curing system provided a useful tool for studying the polymerization kinetics of composite. The irradiance of the PWM-LED light greatly influenced the polymerization shrinkage stress kinetics of composite. The lowered duty ratio (irradiance) at constant irradiant energy reduced the polymerization shrinkage stress.
Biography:
Dr. In-Bog Lee is a Professor in Department of Conservative Dentistry at Seoul National University. He received his D.D.S. (1990) and Ph.D. (1999) from Seoul National University. He has trained in Intern and Resident program at Seoul National University Dental Hospital in 1990 – 1993. He served as a dentist (Captain) in Korean Army for 3 years (1993 – 1996), thereafter, practiced a private dental clinic for 6 years in Seoul. Dr. Lee joined Department of Conservative Dentistry at Seoul National University in 2002. His research interests cover the biomechanics of composite restoration, rheology of dental materials, and instrumentation for measurement. He is the founder of IB SYSTEMS.
King Saud University, Saudi Arabia
Objectives: To evaluate the association between presence of fixed partial dentures and oral halitosis.
Materials and Methods: 88 subjects (50 females, 38 males) attending College of Dentistry, King Saud University, Riyadh, Saudi Arabia were enrolled in this study. The subjects were divided into two groups: 44 subjects with fixed dentures (group I) and 44 subjects without fixed dentures(group II). Breath sample were collected, and The concentrations of H(2)S, CH(3)SH And (CH(3)) (2)S were measured by a portable gas chromatograph (GC) (OralChroma) in ppb.
Results: Halitosis was found affecting 60.2% of the subjects. Significant correlations were observed between the presence of fixed partial dentures and oral halitosis, 79.5 % of the subjects were diagnosed with halitosis in group I vs. 40.9% in group II ( P < 0.001). In addition, Halitosis rate was higher among males than females (81.5% vs. 44% P < 0.001)
Conclusion: The percentage of subjects suffering from halitosis among Saudi population is relatively high, and it is higher among males than females. furthermore, there was a strong relationship between the presences of fixed partial dentures and halitosis.
Keywords: Oral halitosis, Fixed partial dentures Volatile sulfur compound, Oral chromatography
Biography:
Hamad A Alzoman completed BDS at King Saud University and MS at The Ohio State University. His academic experiences Deputy Medical Director, Vice Dean, Assistant for Clinical Affairs, Director of Clinics (2014-2015).
King Abdulaziz University, Saudi Arabia
Objectives: The aim of this study was to evaluate the social impact and self-perception of malocclusion among adolescents, and to investigate whether types and severity of malocclusion have any effect on adolescentsʼ social life.
Method: The sample size was 886 males and females living in Jeddah, Saudi Arabia, chosen from middle and high schoolsFstudents, ages ranging from 12 to 19 years. After completion of the questionnaire to assess social impact, all participants were examined using IOTN; Dental Health Component (DHC) and Aesthetic Component (AC).
Results: The results showed that there is a highly significant difference between the means of both social impact and selfperceived need scores according to gender and according to the severity of treatment need as assessed by the examiner using IOTN.
Malocclusion has a negative effect on social life. Anterior spacing, anterior open bite, increased overjet, and crowding—in this order—have the most negative impact on adolescent social life.
Conclusion: Orthodontists must not only concentrate on the functional and oral health improvement; psychological and social impairment from malocclusion also needs great attention.
Keywords: Malocclusion, Social impact, Adolescent.
Biography:
Dr. Fadia Al-Hummayani works as an Assistant Professor and Consultant Orthodontist. She teaches both the undergraduate, Saudi Board and Master dental students at King Abdulaziz University/ College of Dentistry. Completed her Masterʼs and Clinical Certificate in Orthodontics from King Saud University/Dental School, Riyadh, Saudi Arabia in 1999. She got the Assistance Professor position through research and publications in reputed journals in 2006. She won the Aesthetic Dentistry MENA Award 2010 as the best treated case in the Middle East and North Africa organized by Emirate Medical Association (EMA - Dental Society) and CAPP (Centre for Advance Professional Practices) in United Arab of Emirates, Dubai.
Dental Research Institute and Department of Orthodontics, School of Dentistry, Seoul National University, South Korea
Objective: Most of the vertical measurements in cephalometry dealt with angular values which are less intuitive than linear values. The aim of this study was to evaluate the correlation between vertical position of maxillary first molar and vertical skeletal measurements in the lateral cephalograms using linear measurements on vertical axis of coordinates with calibration.
Materials and Methods: Lateral cephalograms of 103 Korean adults (male 52 persons, female 51 persons, average age 23 years 9 months) with normal occlusions were measured for the vertical position of maxillary first molar (U6-SN) and the other vertical skeletal variables. Pearson correlation analysis and multiple linear regression analysis were performed three times with linear raw values, calibrated values by anterior cranial base length, and calibrated values by posterior cranial base length (PCB) to find variables that were related with U6-SN.
Results: Among the vertical skeletal variables, ODI, SN-GoMe, gonial angle, facial axis, and facial height ratio were significantly correlated with U6-SN, and skeletal hyperdivergency had positive correlation with U6-SN. 7 newly-driven measurements regarding the position of palatal plane were significantly positively correlated with U6-SN. Each of three multiple linear regression analyses generated a two-variable model: Sella to palatal plane and Nasion to palatal plane. Among the three models, the calibrated model by PCB yielded highest value of adjusted R2, 0.880.
Conclusion: The vertical position of maxillary first molar could be determined by the vertical position of maxilla. Cephalometric calibration on the vertical axis of coordinates for vertical linear measurements could strengthen the analysis itself.
Biography:
Il-Hyung Yang, D.D.S., M.S.D., Ph.D. Dr. IH Yang is the program director of the department of orthodontics at the Seoul National University (SNU) School of Dentistry, Seoul, Rep. of Korea, where he holds the rank of assistant professor. He completed his orthodontic training, master degree, and PhD in Orthodontics from SNU School of dentistry and a diplomate of the Korean Board of Orthodontics. He has worked as a member of the Committee of Planning, the Business, the Scientific Affairs, and the Education and the vice Secretary general of the Korean Association of Orthodontists (KAO).
1School of Dentistry and Oral Health, Griffith University, Australia
2Menzies Health Institute Queensland, Griffith University, Australia
3School of Dentistry, University of Queensland, Australia
Objective/ Aim: The aim of this study was to compare the clinical and patient-centred outcomes of subepithelial connective tissue graft (CTG) with and without enamel matrix derivative (EMD) in the treatment of Class I-II Miller periodontal recession defects.
Materials and Methods: This prospective clinical study evaluated 80 patients for a 3- year follow up period in a private periodontal practice. 144 teeth were divided into two groups: Test Group (CTG with EMD – 80 teeth) and Control Group (CTG only - 64 teeth). Clinical (Recession (REC), Keratinized Tissue (KT) width, % root overage) and patient centered outcomes (Pain Visual Analogue Scale (P-VAS)) were compared between the two groups.
Results: At the three year follow up, complete root coverage was achieved in 64.2% of the Test group and 52.9%% of the Control group. The REC in the test group reduced significantly (4.57 ± 1.55 to .5 ± .56) when compared to control group (4.26 ± 1.33 to .92 ± .54) (p<.01). There was also significant increased in KT width in the test vs. the control group at 36 months (2.47 ± .58 vs. 1.72 ± .36) (p < .01). There was less pain reported at the one week follow-up post- surgery in the test group using the Pain-Visual Analogue Scale (p < .01). Discussion: The addition of EMD appears to result in improved root coverage outcomes and higher amounts of keratinized tissue width 36 months after treatment. The adjunctive use of EMD also resulted in significantly reduced pain 7 days after the surgery.
Biography:
Faustino Tino Mercado finished his Postgraduate Diploma in Oral Pathology at the University of Queensland in 1997 and went on to finish his Masters in Dental Science in Periodontics in the same University in 2000. He was involved in the dental undergraduate and periodontal postgraduate training at the University of Queensland and more recently at the University of Sydney.
1Dental Technology Department, Health Polytechnic of Health Ministry Jakarta II, Indonesia
2Dental Materials Department, Faculty of Dentistry, Universitas Indonesia, Indonesia
Objective: The aim of this study was to investigate the role of crosslink density (CLD) and degree of conversion (DC) on mechanical strength of provisional crown and bridge composite resins.
Materials and Methods: Two types of composite resins were used in this study: Light polymerized composit resins and autopolymerized composit resins.Crosslink density was measured by the difference between Knoop Hardness Number (KHN) before and after immersion in absolute ethanol. Degree of conversion was tested by Fourier Transform Infra Red (FTIR). A total of 100 bar specimens (2mm x 2mm x 25mm) were divided into 5 groups (n=10). Each specimen of the first group was measured immediately after preparation. The second, third, fourth and fifth groups were immersed in artificial saliva at 37oC in an incubator for 1 hour, 1 day, 7 days, 14 days, respectively. Flexural strength was tested by Universal Mechanical Testing Machinein a 3-point bending test. Surface hardness was tested by Knoop Hardness. The Repeated ANOVA and Post-Hoc Bonferroni test were used to compare the continuous variables between the groups.
Results: The result of CLD, transversal strength, and surface hardness of autopolymerized composite resins were higher significantly than light polymerized composite resins. But the values of DC of light polymerized composite resins were higher than CLD significantly.
Conclusion: CLD plays the main role in mechanical strength of provisional crown and bridge composite resins compared DC.
Keywords: Crosslink density, degree of conversion, flexural strength, surface hardness, provisional crown and bridge composite resins.
Biography:
Marzia Magdalena Tetelepta woks in Dental Technology, Health Polytechnic of Health Ministry Jakarta II, Jakarta, Indonesia. Marzia Magdalena Tetelepta completed her DDS in Faculty of Dentistry of Universitas Indonesia, Jakarta, Indonesia. She got her Master Degree of Dental Materials Science in the same university. Since 2000 up to now, she is a lecturer in Dental Technology Department, Health Polytechnic Health Ministry Jakarta II, and Indonesia.
Department of Dental Technology, Health Polytechnic of Health Ministry Jakarta II, Indonesia
Patient with denture for a long time often experience disorders such as dentures easily dislodged and pain. Management can be done is by relining or adding a sufficient new material to surface of dentures contact to support tissue to fill the existing space between denture base with surface of altered tissue. One of the materials that can be used is using a soft denture reliner. The successful use of this reline material depends on retention of acrylic surface.
This study aims to determine effect of size AL2O3 and duration sandblaster in making roughness of acrylic surface on tensile strength of silicone and acrylic soft denture reliner. Research Methods: Experimental Laboratory with samples of acrylic block with length 80 mm, large block 10x10 mm and 10x8 mm small block with thickness of 3 mm soft denture reliner. The total number of samples 70 divided into 2 groups based on silicone and acrylic soft. Each group is divided into 5 groups based on size of AL2O3 particles and duration.
Result: Based on ANOVA and t-test ( p <0.05), it was found that the control and the small size of AL2O3 specimen had a smaller mean and significantly different than large size specimen in all groups and the acrylic soft group has a larger mean and significantly different than the silicone group.
Conclusion: The large size of AL2O3 and long duration are more effective in making roughness of acrylic surface and acrylic soft is greater bond strength on acrylic surface than silicon.
Keywords: Surface roughness, size of AL2O3 sandblaster, tensile strength, soft denture reliner.
Biography:
Endang Prawesthi works in Dental Technology, Health Polytechnic of Health Ministry Jakarta II, Jakarta, Indonesia. Endang Prawesthi completed her DDS in Airlangga University Faculty of Dentistry, Surabaya, Indonesia and specialist program in department of Prosthodontics, Indonesia University Faculty of Dentistry, Jakarta, Indonesia. Since 2004 she is Lecturer in department of Dental Technology, Health Polytechnic of Health Ministry Jakarta II, Jakarta, Indonesia.
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