Indian journal of dentistry最新文献

Juvenile ossifying fibroma (JOF) is a rare fibro-osseous lesion of the jaw occurs at the early age of onset frequently under 15 years with a propensity to recur. It appears as a unilobulated/multilobulated lesion at an early stage followed by radiopaque appearance surrounded by radiolucent rimming at advanced stages. The psammomatous type of JOF (PsJOF) principally involves the bones of the orbit and paranasal sinuses. However in some cases, maxilla or rarely the mandible may be pretentious. Here, we report a challenging case of PsJOF in a 6-year-old child with a complaint of swelling imitating a cystic lesion in left back region of the lower jaw for 2 months. The authors propose that a careful examination and correlations of clinical, radiological, and histopathological features are essential to arrive at correct diagnosis and play a vital role in management of such patients.

Aims and objectives: The purpose of the study was to determine the effect of border molding on the retention of the maxillary denture base.

Materials and methods: Two special trays, one with full extensions to the periphery and one 2 mm short from the borders were made on the cast obtained from the preliminary impression. Border molding was done on the tray which was short from borders. On both trays, the final impression was made with zinc oxide eugenol impression paste. Heat cure denture bases were fabricated on the prepared casts and retention was measured using specially designed instrument.

Observations and results: Mean force with border molding (2765.0 g) was larger than mean force without border molding (1805.0 g) at P < 0.01 level. In terms of percentage, too, the mean improvement (59.4%) in force of dislodgement was statistically highly significant (i.e. P < 0.01).

Clinical significance: The results of the present study suggest that the dentures made with border molding will provide better retentive force than the dentures made without border molding.

Purpose: This study is conducted to investigate the feasibility of echographic imaging of tissue thickness of healthy and reconstructed cleft lip.

Design: Prospective study.

Materials and methods: The study was conducted in SDM Craniofacial Unit, Dharwad and was approved by Local Institutional Review Board. A total of 30 patients, age group ranging from 4 to 25 years, of which 15 postoperative unilateral cleft lip constituted the test group. The remaining 15 with no cleft deformities, no gross facial asymmetry, constituted the control group. The thickness of the mucosa, submucosa, muscle and full thickness of the upper lip were measured with the transversal images using ultrasonography at midpoint of philtrum, right and left side philtral ridges and vermillion border, at 1, 3, 6 months interval.

Results: There was an increase in muscle thickness at the vermillion border (mean = 6.9 mm) and philtral ridge (5.9 mm). Equal muscle thickness were found between the normal and test group at 6 months follow-up in a relaxed position, which was statistically significant (P = 0.0404).

Conclusion: Quantitative assessment of thickness and echo levels of various lip tissues are done with proper echographic calibration. Diagnostic potentials of this method for noninvasive evaluation of cleft lip reconstructions were achieved by this study.

Background: Cyst and tumors arise from tissue remains of odontogenesis, these interactions have been considered to play an important role in the tumorigenesis of odontogenic lesions. The connective tissue stroma has an essential role in the preservation of epithelial tissues and minor alterations in the epithelium are followed by corresponding changes in the stroma, such as angiogenesis. Vascular endothelial growth factor (VEGF) is considered the first factor which maintains its position as the most critical driver of vascular formation and is required to initiate the formation of immature vessels, with this aim, present study was executed to evaluate VEGF expression in kertocystic odontogenic tumor, dentigerous cyst and radicular cyst (RC).

Materials and methods: A retrospective study was carried out comprising a total of 31 cases; 13 cases of keratocystic odontogenic tumor (KCOT), nine cases of dentigerous cyst (DC) and nine cases of RC. The sections were stained immunohistochemically with VEGF antibody and were evaluated for the presence and intensity of the immuno reactive cells. Statistical analysis was carried out using Chi-square test to inter-compare the VEGF expression between KCOT, DC, and RC.

Results: VEGF expression in the epithelium and connective tissue was significantly higher in KCOT compared to dentigerous and RC. One case of KCOT with carcinomatous change also revealed positive results for the VEGF expression in the dysplastic epithelium, tumor islands, and connective tissue. The significant difference was observed on inter-comparison of the VEGF expression in the connective tissue of KCOT and DC, whereas no significant difference was observed in the VEGF expression in the connective tissue of KCOT and DC.

Conclusion: The present study data supports the literature finding that angiogenesis can be important in the progression and enlargement of odontogenic cysts similarly to what occurs in neoplastic conditions and further it can be concluded that the higher positivity for VEGF of KCOT could help to explain in part the aggressive biological behavior of the lesion. The stroma of KCOT could be regarded not only as a structural support of the cyst wall but also as playing a part in the neoplastic behavior of cyst.

Aim and objectives: This study evaluated the efficacy of oral methylprednisolone and diclofenac sodium on post-operative sequelae after third molar surgery.

Settings and design: A randomized double-blind clinical trial was conducted (with institutional and university approval for dissertation) to evaluate the effect of methylprednisolone with diclofenac sodium (group A) as compared with diclofenac sodium and placebo (group B) on three variables: Pain, swelling and trismus, after third molar surgery.

Materials and methods: Thirty consecutive consenting patients for surgical removal of mandibular impacted third molar were randomly placed into two groups of 15 each (groups A and B). Pain, swelling and trismus were observed by visual analog scale, facial measurements and inter-incisal opening. Scores were recorded after 24 and 72 h and on the seventh post-operative day. Results were subjected to the Chi-square test and independent sample t-test (P = 0.05).

Results: Mean difference in pain experienced between the two groups was statistically significant at 24 h (P = 0.015) and 72 h (P = 0.001) and on the seventh day (P = 0.005). Difference in inter-incisal distance was insignificant (P = 0.239) pre-operatively, but significant after 24 h (P = 0.014) and 72 h (P = 0.001) and on the seventh post-operative day (P = 0.001). Mean difference in swelling was highly significant after 24 h (P = 0.001) and 72 h (P = 0.0001) and on the seventh post-operative day (P = 0.047).

Conclusions: The combination of oral dose of methylprednisolone (a corticosteroid) diclofenac sodium (a non-steroidal anti-inflammatory drug) was found to be more effective than diclofenac sodium alone on the sequelae of surgical removal of impacted mandibular third molar.