Vol 7, No 1 (2010)
Proceeding Abstracts
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Objective:
Long-term retention of pit and fissure sealants is crucial for their success. This clinical study evaluated the retention rate of a flowable composite resin (Filtek Supreme XT Flowable Restorative) compared to a conventional resin-based sealant (Concise Light Cure White Sealant) over 12 months.
Materials and Methods:
Forty subjects aged 6 to 9 years were included in the study. Using a half-mouth design, a total of 80 first permanent molars were sealed with conventional fissure sealant on one side of the mouth and flowable composite on the contralateral side. Clinical evaluation was performed at 3, 6, and 12 months by a single blind examiner and the retention was classified as complete retention, partial loss, or total loss.
Results:
For both materials, there was no total loss of sealants over 12 months. Partial loss of both materials was observed in one sealant after 3 months. After 6 months, 36 teeth sealed with conventional fissure sealant were intact compared with 37 sealed with a flowable composite, and after 12 months, 33 teeth sealed with conventional fissure sealant were intact compared with 35 that were sealed with a flowable composite. There were no statistically significant difference (P>0.05) between the two materials regarding the retention rate at each follow-up period.
Conclusion:
As flowable composite resulted in comparable sealant retention rates, this material could be a good choice for fissure sealant.
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Objective:
Bleaching agents may not be safe for dental materials. The purpose of this invitro study was to evaluate the effects of Opalescent Quick "in-office bleaching gel" containing 35% carbamide peroxide on the surface roughness and hardness of microfilled (Heliomolar) and hybride (Spectrum TPH) composite resins.
Materials and Methods:
Twenty specimens of Spectrum TPH composite resins and twenty Heliomolar composite resins were fabricated using a metallic ring (6.5 mm diameter and 2.5 mm thickness) and light cured, then their surfaces were polished. Specimens of each composite resin were divided into two equal groups. Ten specimens of each type of composite were stored in water at 37°C as the control groups and 35% carbamide peroxide gel (Opalescence Quick) as the other group for 30 minutes a week for 3 weeks. Then the specimens were subject to roughness and hardness tests.Results:
This study revealed that using 35% carbamide peroxide bleaching gels had no significant effect on the surface roughness of Spectrum TPH "hybrid" and Heliomolar "microfilled" composite resins. The surface hardness of Spectrum TPH composite treated with the subject gel significantly increased compared to heliomolar, which had no significant change after treatment with this bleaching gel.Conclusion:
If tooth color matching of the composite had been satisfactory after office bleaching with 35% carbamide peroxide gel, this material would have been acceptable because it has no adverse effect on Heliomolar and Spectrum TPH composite resins. -
Objective:
An association between diabetes mellitus and alterations in the oral cavity has been noted. In this study, we evaluated differences between salivary IgA, glucose and flow rate in diabetic patients compared with healthy controls.
Materials and Methods:
Forty patients with type 1 diabetes, 40 patients with type 2 diabetes and 40 healthy controls were selected. Whole unstimulated saliva samples were collected by the standard method and the salivary flow rate was determined. Nephelometric and Pars method were used to measure salivary IgA and salivary glucose concentrations, respectively. Statistical analysis was performed by Chi-square and t test.Results:
There were no significant differences in salivary IgA and glucose concentrations between type 1 and type 2 diabetic patients and their matched control subjects (P>0.05). Salivary flow rate was significantly lower in diabetic patients (P<0.05). In addition, DMFT was higher in diabetic patients than the controls.Conclusion:
Determination of salivary constituents may be useful in the description and management of oral findings in diabetic patients. -
Objective:
To compare the awareness of provisions of consumer protection act among dental and medical professionals in Udaipur city, Rajasthan, India.
Materials and Methods:
In a cross sectional study, a total of 448 professionals (253 males, 195 females) belonging to dental (222) and medical (226) categories were surveyed using a self administered structured questionnaire. The questionnaire comprised of 22 questions about the awareness of consumer protection art (CPA) and whether these professionals were following the recommendations of CPA. The student's t-test, ANOVA test, and Scheffe's test were used as tests of significance.Results:
The awareness scores were significantly higher for medical professionals compared with those of dental professionals. Similarly, postgraduates showed more awareness in both the professions and it was found that private practitioners significantly have more awareness than the academic sector.Conclusion:
Though medical professionals have more awareness of CPA compared to dental professionals, considering the present scenario, better knowledge of CPA is necessary for both professionals in order to be on the safer side. -
Objective:
To assess whether non-surgical periodontal treatment is associated with changes in serological markers of systemic inflammation.
Materials and Methods:
Thirty-five systemically healthy subjects with severe generalized periodontitis meeting the inclusion criteria participated in a four-month single blind interventional trial of which thirty-two completed the study. Periodontal parameters and inflammatory markers [C-reactive protein (CRP) and plasma fibrinogen] and also the white blood cell count (WBC) were evaluated prior to and four months after delivery of intensive non-surgical periodontal therapy with simultaneous lavage of chlorhexidine 0.1% from the tip of the ultrasonic instrument into the pockets.
Results:
Significant differences in serum CRP levels were observed four months after treatment compared to the baseline (1.85, SD=1.93 vs 2.46, SD=2.32, respectively, P<0.0001). Periodontal treatment also resulted in a significant difference in WBC and neutrophil counts compared to the baseline (P<0.0001). The reduction in fibrinogen levels was not significant at the end of the research period. Significant improvement in the pocket probing depth and clinical attachment level for pockets with initially 4-6 mm and then more than 7 mm depth was observed. Changes in plaque and bleeding scores were also statistically significant (82.75 vs. 35.84 and 19.03 vs. 1.81, respectively).
Conclusion:
Periodontal treatment is effective in reducing CRP levels and white blood cell count, while fibrinogen levels are not influenced by periodontal therapy. Periodontal treatment may therefore decrease the systemic inflammatory burden in patients with advanced periodontitis.
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Objective: Evaluating the effect of resin coating and chlorhexidine on microleakage of
two resin cements after water storage.
Materials and Methods: Standardized class V cavities were prepared on facial and lingual
surfaces of one hundred twenty intact human molars with gingival margins placed 1
mm below the cemento-enamel junction. Indirect composite inlays were fabricated and the
specimens were randomly assigned into 6 groups. In Groups 1 to 4, inlays were cemented
with Panavia F2.0 cement. G1: according to the manufacturer's instruction. G2: with light
cured resin on the ED primer. G3: chlorhexidine application before priming. G4: with
chlorhexidine application before priming and light cured resin on primer. G5: inlays were
cemented with Nexus 2 resin cement. G6: chlorhexidine application after etching. Each
group was divided into two subgroups based on the 24-hour and 6-month water storage
time. After preparation for microleakage test, the teeth were sectioned and evaluated at
both margins under a 20× stereomicroscope. Dye penetration was scored using 0-3 criteria.
The data was analyzed using Kruskal-Wallis and complementary Dunn tests.
Results: There was significantly less leakage in G2 and G4 than the Panavia F2.0 control
group at gingival margins after 6 months (P<0.05). There was no significant differences in
leakage between G1 and G3 at both margins after 24 hours and 6 months storage. After 6
months, G6 revealed significantly less leakage than G5 at gingival margins (P=0.033). In
general, gingival margins showed more leakage than occlusal margins.
Conclusion: Additionally, resin coating in self-etch (Panavia F2.0) and chlorhexidine application
in etch-rinse (Nexus) resin cement reduced microleakage at gingival margins after
storage. -
Supernumerary tooth is one of the developmental problems in children. Mesiodens is a supernumerary tooth present in the midline between the two central incisors. It usually results in oral problems such as malocclusion, food impaction, poor aesthetics, and cyst formation. The prevalence of mesiodens varies between 0.09% and 2.05% in different studies. This paper reviews current literature on etiology, prevalence, diagnosis, and management of this problem. Accordingly, early diagnosis and treatment is suggested to prevent orthodontic and pathologic complications.
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Bilateral Intraosseous Migration of Mandibular Second Premolars in a Patient with Nine Missing Teeth
Intraosseous migration is an unusual developmental dental anomaly, which demonstrates horizontal movement of unerupted teeth only affecting the permanent dentition of the lower jaw. Mandibular second premolar is the most common impacted tooth after the third molars and maxillary canines. Distal migration of the second premolar is rare and early loss of the permanent first molar is one of the most important predisposing factors of intrabony migration of this tooth. Bilateral migration of the mandibular premolars is very rare compared to unilateral migration. Hereby, we present an 18-year-old man with bilateral intrabony migration of the mandibular second premolars to the mandibular angle (at the inferior and buccal side of the mandibular canal) in the presence of first molars. The patient also had nine congenitally missing teeth without any systemic complication or abnormality in the skeleton. The teeth were surgically extracted. The clinical and diagnostic features and treatment of this case are discussed.
