International Journal of Dental and Health Sciences

1409-1416

Authors: Amit Chhaparwal, Jyoti Kundu, Ravinder Kumar, Hemlata Sharma

Aim and Objectives: To evaluate whether the intermediate layers of Flowable Resin Composite and Resin Modified Glass Ionomer Cement used prior to packable composite resin restoration would eliminate or significantly decrease microleakage at the gingival floor and which is the most suitable intermediate layer under packable composite resin restoration . Materials and Methods: Standarized Class II box only cavities (1.5mm mesio-distal extension, 3.0 mm buccal-lingual extension and the gingival seat placed at the CEJ) were restored as follows: Group A Restortion with packable composite alone, Group B 1mm flowable composite liner + packable composite, Group C 1mm resin modified glass ionomer liner + packable composite. The specimens were thermocycled, stained with methylene blue dye, sectioned to evaluate the dye penetration. Data were analysed using one way ANOVA and Bonferroni test. Results: There was no statisticaly significant difference between the groups. Conclusions: None of the groups was able to eliminate microleakage completely. Flowable resin composite when used as a 1mm thick liner under a packable resin composite at the gingival margins showed overall less microleakage than the other two groups to some extent. Keywords: Flowable resin composite; intermediate layers; marginal microleakage; packable composite; resin modified glass ionomer

1424-1439

Authors: Sleiman H. Ahmad,Yazan T. Jahjah

The aims of this study were to investigate the possible association between the TMJ structure and facial pattern in subjects with no clinical or radiographic symptoms of TMDs, by using sagittal and axial slice computed tomography imaging. In result of a multistage clinical examination protocol 60 Caucasian patients with no prior orthodontics treatment who had to have a CT scan for medical purpose, (but not especially for this study) were selected from 16 to 29 years of age with no clinical signs and symptoms of TMDs. The images obtained from the axial and sagittal slices, Cephalometric growth pattern study was performed according to Jarabak. The facial and TMJ proportions data were analyzed using independent sample Student t-test and Pearson correlation analysis Results: In subjects with no clinical or radiographic symptoms of Temporomandibular Joint Disorders, No significant differences in the joint spaces, and joint morphology between left and right TMJs were found. There was a statistically significant relation between (condyle dimensions, Depth of the mandibular fossa, angle and height of the articular eminence) and facial patterns. Pearson's Correlation test showed A significant correlation (with different direction and strength ) between TMJ measurements and most of Cephalometrics facial pattern measurements . Conclusion: In subjects with no clinical or radiographic symptoms of Temporomandibular Joint Disorders, there was a statistically significant relation between TMJ morphology and facial patterns. The value of condyle dimensions, Depth of the mandibular fossa, angle and height of the articular eminence were significantly larger in Horizontal facial pattern than normal and vertical facial pattern. Key Words: condylar symmetry, TMJ morphology, growth pattern, Computed tomography, temporomandibular joint, facial pattern.

1450-1459

Authors: Soumaya Touzi, Rim Kallala, Mohamed Romdhane, Nissaf Daouahi, Imen Guesmi, Jilani Saafi, Mounir Cherif

Introduction:Canal morphology of the maxillary first molar is very particular and the knowledge of root canal anatomy is necessary in the success of endodontic therapy. The purpose of this study is to determine the frequencies of root and canal morphologies of permanent maxillary first molar in a sample of 85 molars in Tunisia. Materials and methods:In this study, we used 85 maxillary first molars extracted for periodontal reasons. Each tooth is macroscopically examined to determine the number of roots and then we grind progressively at the root surface to highlight the path of the root canals. Canal number and configurations of both mesial and distal roots are observed and analysed using sections. Results:In the present study, most of maxillary first molars were 3 rooted(96.9 %) and 3.4% were 2 rooted. This study showed in the mesio buccal root the predominance of Vertucci type I cases(67%). In the disto buccal root, this study showed the presence of a single canal in 100 % of cases. Palatal root had mainly one canal (97.6%). Conclusion:The prevalence of two roots was 3.4%. In the mesio buccal root, the most prevalent configuration was type I (67%). In the disto buccal root, we found vertucci type I on 100% of cases. Palatal root had mainly one canal (97.6%). Key words:Anatomy, maxillary first molar, morphology, root, canal

1466-1480

Authors: Ritika Agrawal Sharma, Sanjna Mehta, Akshay Parmar,Krupa Bambal

Aim: To check the efficacy of VELscope in identifying early soft tissue abnormalities (premalignant/malignant,etc) in the oral cavity which is not visible to the naked eye on clinical examination. Materials &Methods: It is a prospective, cross-sectional study performed by conducting oral cancer screening camps in the community over a period of 6 to 9 months in the Indian population (esp-mumbai suburbs) Around 700 males and females between 18 – 90 years of age ,with habits chewing and/or smoking tobacco. Results: In our study out of the 740 patients selected for the screening for early detection, 669 patients had no abnormality detected on clinical examination and thus were included in this study. Out of the 669, 8 patients (6 male and 2 females) showed changes loss of florescence on velscope examination with nothing detected clinically, biopsy of these sites was done and evaluated using histopathological examination out of which none were reported malignant/ premalignant. Conclusion: With our study we conclude that velscope did not help in early detection of oral lesions before it is visible to naked eye examination, its efficacy is flawed in terms of sensitivity and needs improvement. Key words: early lesions, efficacy of velsope, malignant and premalignant lesions.

1490-1499

Authors: Abdulgani Azzaldeen *, Abusalih Ahmet ,Hakki Ismail ,Chlorokostas Georges, Abu-Hussein Muhamad

Mini dental implants (MDI) have become increasingly popular in the past decade and have been approved for many long-term uses in dentistry. There are many advantages of the use of mini dental implants from both a practitioner and patient perspective. For the general dentist starting out in implant dentistry, their placement can be more challenging than conventional implants. It requires a different skill set, but one which can be learned with proper guidance and practice.In the study are presented clinical cases with mini implants with spherical joints for retention of removable overimplant mandibular dentures. Key words: mini dental implants, immediate loading implants Prosthetics, overdenture

1506-1518

Authors: D.Prabhu Shankar,P Manodh , V.G.Muruganand , Aparna Murugan

The extraction of impacted mandibular third molars has long been associated with the dreaded and rarely, grave and irreversible complications. The oral and maxillofacial surgeons’ dogma strongly links most complications with the proximity of inferior alveolar canal and the impacted teeth, the relationship of which is still a topic of debate among surgeons. In this randomized, prospective case study, involving 114 patients, we have attempted to evaluate the relationship between impacted mandibular third molar root and the inferior alveolar canal with intra oral periapical radiographs using photo stimulable phosphor plates and the incidence of inferior alveolar nerve injury following removal of impacted mandibular third molar. Preoperative assessment based on Rood and Shehab Criteria revealed 38.6% cases with an interruption of white line, 25.4% had darkening of root and 11.4% cases with diversion of the canal and 7% of cases revealed an inferior alveolar nerve deficit corresponding with the radiographic signs of “darkening of the third molar root” and “interruption of white line” by the third molar root. In comparison with the other imaging modalities Photo Stimulable Phosphor plate consumes less time with higher image resolution and magnification to gain better knowledge of the inferior alveolar canal and root relationship Key words: Impaction - Mandibular molar- Photostimulable plate – radiographic signs -Inferior alveolar nerve

1523-1530

Authors: Rashmi G. Salkar, Usha M. Radke, Saee P. Deshmukh, Pranjal M. Radke

Temporomandibular disorders (TMD) are the major disorders of the cranio-cervico-mandibular system. They usually result in alterations of human body posture. Temporomandibular joint disorders (TMD) lead to adaptations in certain body structures that minimizes patient’s pain and also reconfigures musculoskeletal stress zones. These adaptations if not corrected may cause deviations in normal body posture. Posture involves activation of various muscles that are controlled by the central nervous system (CNS) which lead to postural adjustments. Complex mechanisms that are controlled by various sensory inputs (viz. vestibular, somatosensory, visual) which are integrated in the central nervous system (CNS) cause postural adjustments. The stomatognathic system has an important role to play in postural control. This article reviews the relationship between temporomandibular disorders and body posture. Keywords: Temporomandibular joint disorder, body posture, stomatognathic system

1535-1547

Authors: Yogish. P, Asha Yogish

Patients with head and neck squamous cell carcinoma (HNSCC) often develop multiple (pre) malignant lesions. This finding led to the field of the cancerization theory, which hypothesizes that the entire epithelial surface of the upper aerodigestive tract has an increased risk for the development of (pre) malignant lesions, because of multiple genetic abnormalities in the whole tissue region. Demonstration of alterations in histologically normal tumor-adjacent mucosa from HNSCC patients supported this hypothesis. Currently, the question has been raised whether multiple lesions develop independently from each other or from migrated malignant or progenitor cells. Moreover, almost all primary remote tumors from HNSCC patients appear to be clonally unrelated. Therefore, there is more evidence that field cancerization is due to multiple independent events than to migration of genetically altered cells. Keywords: Oral squamous cell carcinoma, intra epithelial migration, second field tumours.