Day 3 :
Ibrahim A Jbara has obtained his DDS, MD and PhD in Advanced Implant Surgery at Milano (MI) Italy. He is the Member of Colloquium Committee Lebanese Dental Association and Clinical Associate department of Periodontolgy at Damascus University Dental School, Lebanon.
As the applications for dental lasers expand, greater numbers of dentists will use the technology to provide patients with precision treatment that may minimize pain and recovery time. The application of lasers in dentistry opens the door for dentists to perform a wide variety of dental procedures they otherwise may not be capable of performing. Dentists using lasers in dentistry have become adept at incorporating the state-of-the-art precision technology into a number of common and not-so-common procedures. ((Cavity detector, dental fillings/tooth preparation, tooth sensitivity, crown lengthening, gummy smile, muscle attachment (Frenula soft tissue folds (Epulis), viewing tooth and gum tissues, benign tumors, cold sores, nerve regeneration, sleep apnea, teeth whitening, temporomandibular and joint treatment)
- Dental Sleep Medicine
Introduction: Air pollution and respiratory allergies cause respiratory sleeps disorders (RSD) and are related with maxillary hypoplasia and malocclusion in children and adolescents. Chronic airway resistance syndrome is linked to maxillary hypoplasia, which can be treated early. Airway resistance syndrome may be present: Bruxism, speech, fear, sweating, bedwetting during sleep, daytime sleepiness and/or restlessness, headaches, anxiety, mood swings, and Attention Deficit Hyperactivity Disorder.
Objective: Dental management of mouth breathing and sleep aids the diagnosis and early treatment of maxillary hypoplasia and upper airway obstruction in the oro-naso-hypopharynx through dentition.
Materials & Methods: Diagnosis based on lateral-view and panoramic radiographs and plaster models enables treatment planning of maxilla and malocclusions by combining orthodontic techniques using a Haas palatal expander and functional orthopedic techniques using occlusal resins and planas direct and indirect compound tracks.
Results: The Haas expander is employed for transverse maxillary expansion along the piriform base of the nasal triangle. Planas direct and indirect compound tracks provide continued plus treatment of malocclusions in RSD, with advancement and change in mandibular therapeutic positioning, directly increasing intraoral and occlusal vertical dimensions in primary and mixed dentition.
Discussion: Maxillary expansion improves nasal permeability and, allied to mandibular advancement, enables better lingual positioning in the orohypopharyngeal cavity. Occlusion and adjusted vector forces can help neuromuscular growth, development and tone, and airway synchrony with balanced lingual position.
Conclusion: Children and adolescents with DRS, rhinitis, recurrent tonsillitis, subjected or not to adenotonsillectomy, benefit from early treatment with planas direct and indirect compound tracks for mouth breathing and sleep, maxillary hypoplasia, malocclusion and airways, and prevent suffering.
- Dental Biomaterial Science
Taif University, Saudi Arabia
Mohamed Ashour Ahmed has graduated from Faculty of Dental Medicine, Azhar University, Egypt. His researches were dealing with variability of oral vestibule reproduction on using different border molding and impression materials, comparison between one and two symphyseal implant retained mandibular overdenture, and effect of nanoparticles reinforced adhesive layers on mechanical and physical properties on different types of acrylic resin denture base. He is on leave from Azhar University to Taif University, Saudi Arabia.
The aim of this study is to clarify the effect of different concentrations of titanium dioxide nanoparticles (Nps) on the properties of two types of heat polymerized acrylic resin. The tested parameters were flexural strength, impact strength, and microhardness. The two types of acrylic resin used in this study were conventional unmodified (Implacryl, Vertex) and high impact heat polymerized acrylic resin (Vertex-Dental, Netherlands). Both types of acrylic resin were modified by using 1% and 5% TiO2 Nps powder. Specimen's dimensions were prepared according to the American Dental Association Specification No. 12. Three types of specimens were prepared; 1) flexural strength specimens 2) impact strength test specimens, 3) microhardness specimens. For each test 6 groups were prepared (each group containing 5 samples). Thirty specimens were prepared in each of the three tests, amounting to total number of 90 specimens. Mechanical properties such as flexural strength (FS), impact strength and microhardness of the above mentioned specimens were determined using universal testing machine, Izod pendulum impact testing machine and Vickers microhardness tester, respectively. ISO Specification No. 1567 was followed in microhardness test. The data was collected and statistically analyzed. Flexural strength considerably decreased by increasing TiO2 concentration in both types of acrylic resin. Impact strength of the conventional acrylic resin modified by 1% of additives significantly increased. The microhardness is significantly increased by addition of 5% of TiO2 Nps. The incorporation of TiO2 nanoparticles into acrylic resins can adversely affect its flexural strength. Meanwhile, the impact strength can be modified by small percentage of additives (abt. 1%). This effect is directly correlated with the concentration of nanoparticles. On the other hand, concentrations of TiO2 Nps (abt. 5%) positively affect the microhardness of both types of acrylic resin used in the present study.
University of Hama, Syria
Background: This study aimed to compare super-elastic and heat-activated nickel-titanium orthodontic wires surface morphology and potential release of nickel Ions following exposure to oral environment conditions.
Methods: 24 20-mm-length distal cuts of superelastic (NiTi Force 1) and 24, 20-mm- length distal cuts of heat activated (Therma-Ti lite) nickel titanium wires (American orthodontics, Sheboygan, WL, USA)were divided into two equal groups:12 wire segments passively exposed to oral environment for 1 month. Scanning electron microscopy were used to analyze surface morphology of the wires which were immersed in artificial salive for 1 month to determine potential nickel Ions' release by means of atomic absorption spectrophotometer.
Results: Heat-activated nickel-titanium (NiTi) was rougher than super-elastic wires and both types of wires released almost the same amount of Ni ions. After clinical exposure more surface roughness was recorded for super-elastic NiTi wires and heat-activated NiTi wires. However, retrieved super-elastic NiTi wires released less Ni ions in artificial saliva after clinical exposure, and the same result was recorded regarding heat-activated wires.
Conclusions: Both types of NiTi wires were obviously affected by oral environment conditions, their surface roughness significantly increased while the amount of the released Ni ions significantly declined.
Mai Salah El-Din has completed her BDS (2003), Msc in Prosthodontics (2009) from Alexandria University, Egypt. She has served as a Dental Assistant in El-Attar Dental office (2003-2006). She is a member of the Alexandria Oral Implantology Association (AOIA). She had been working as a clinical instructor in prosthetic clinical sessions at Dentistry College, Alexandria University (2005-2010). She was a full time teaching assistant in removable prosthodontics department, Pharos University in Alexandria (2010-2016). Currently, she is doing her Doctor Degree studies in Prosthodontics at Minia University, Egypt.
A direct link was found between surface roughness, the accumulation of plaque and the adherence of microorganisms concerning acrylic resin materials. However, the surface properties of the new thermoplastic materials remain questionable especially after using the conventional finishing and polishing techniques. This in vitro study intended to compare three types of denture base materials in regard to the effect of different polishing techniques on their surface roughness. A conventional heat cured PMMA and two types of thermoplastic materials were used in this study. Studying surface properties of each material makes the recommendation of the proper techniques easier. The four polishing techniques affected differently the surface of each material.
Sardar Begum Dental College, Pakistan
Introduction: Dental anxiety is a highly prevalent condition. It is feeling so nervous or fearful about a visit to the dentist that it interferes with your dental care and health. It can occur as fear of pain, needles, the drill, simply not knowing what may happen or being out of control. There are many causes of dental anxiety. When people hear stories about difficult dental visits or experience some pain themselves, they often feel afraid of the potential pain associated with the procedure and the things related to that pain such as needles, the sounds, sights and smell of a dental office, and many other features of the visit. Fear sensations such as sweaty palms, butterflies in stomach and a racing heart may develop. It can cause you to avoid going to the dentist when needed to treat current problems or prevent future problems. People with dental anxiety have a sense of uneasiness about the upcoming dental appointment. They may also have exaggerated worries or fears.
Objectives: The objectives of the study were to determine the prevalence of dental anxiety, frequency of dental anxiety among both genders, common factors influencing dental anxiety and effect of past experience with dental anxiety among the patients coming for treatment to dental institutes of Peshawar.
Materials & Methods: It was a cross-sectional study in which 300 patients, 151 males and 149 females, aged 18-90 years were questioned. The assessment tool consisted of a questionnaire form containing the MDAS (Modified Dental Anxiety Scale) which was used to assess the level of dental anxiety. The study was carried out in Sardar Begum Dental College and Khyber College of Dentistry.
Results: Out of 300 patients, 13% turned out to be dental anxious, out of these 13%, 79.48% were females and 20.52% were males. Out of the total dental anxious patients, 44.33% were anxious due to tomorrow’s treatment/appointment. 44.98% were anxious due to scaling and polishing, 46.16% were anxious while sitting in the waiting room, 68.67% were anxious due to tooth drill, while 72.67% were anxious due to local anesthetic injection. Out of the 13% dental anxious patients, 66.67% had a good past experience with the dentist while the remaining 33.33% had a bad past experience.
Conclusion: Females are more dental anxious than males. Local anesthetic injection and tooth drill for restorative purposes were the most common factors influencing dental anxiety. The study also shows that the past experience with the dentist does not affect the anxiety score.
Biography • Graduated at College of Dental Medicine - Cairo- University – Egypt – 1981 , Professor and Head division of Oral Medicine ( KSU )- Saudi –Arabia – 2013, • Former Vice Dean . Dental College – Al-azhar University - Egypt – 2003-2007 , Chairman of Oral Medicine Department - Dental College – Al-azhar – University – EGYPT- 2002, Visitor Professor - Tripoli university - Libya- 2005, Post- doctor degree – Maxillofacial Radiology - Dental College – Osaka – Japan 1993-1994 , Member (International American Association of Period ontology ( IAAP ) -1999 International Association of Maxcillofacial Radiology ( IAMR )- 1995, Egyptian Dental Association - 1982 , Saudi Dental Society- 2008 ) • Editorial Board Membership: Journal Dentistry & Oral Care ( 2015 ) & International Journal of Dentistry and Oral Science (IJDOS)( 2014) • Member for Faculties Promotion ( at :- King Abdalaziz - King Fisal univ. of Damam - & Sana's Un.- yemen.) • Reviewer..&.Referee.for.King Abdul-Aziz city for Science and Technology (KACST) & Journals ( KSUDS - SJDR - SDJ ) in the Kingdom of Saudi Arabia • Most resent publications ( Journal of Endotondology ( JOE ) (J Endod 2013;-:1–7,The Saudi Dental Journal for Research ( SDJR ) 2015 – 6-26-29 & Saudi Dental Journal ( SDJ ) article in press – accepted in January 29-2015. Oral presentations ( Dalian – Chania 2015 ) & ( Melbourne - Australia 2016 )
A clinician attempting to diagnose an ulcerative or vesiculobullous disease of the mouth is confronted with the fact that many diseases have a similar clinical appearance. The oral mucosa is thin, causing vesicles and bullae to break rapidly into ulcers, and ulcers are easily traumatized from teeth and food, and they become secondarily infected by the oral flora.These factors may cause lesions that have a characteristic appearance on the skin to have a nonspecific appearance on the oral mucosa. Mucosal disorders may occasionally be correctly diagnosed from a brief history and rapid clinical examination, but this approach is most often insufficient and leads to incorrect diagnosis
and improper treatment. The history taking is frequently underemphasized, but, when correctly performed, it gives as much information as does the clinical examination. A detailed history of the present illness is of particular importance when attempting to diagnose oral mucosal lesions. A complete review of systems should be obtained for each patient, including questions regarding the presence of skin, eye, genital, and rectal lesions. Questions should also be included regarding symptoms of diseases associated with oral lesions; that is, each patient should be asked about the presence of symptoms such as joint pains, muscle weakness, dyspnea, diplopia, and chest
pains. The clinical examination should include a thorough inspection of the exposed skin surfaces; the diagnosis of oral. lesions requires knowledge of basic dermatology because many disorders occurring on the oral mucosa also affect the skin.
So , the took will include , Definitions , Classifications ,Clinical features , Pathogenesis, Diferetional diagnosis , Treatment & new trends