Use Of Dexmedetomidine As An Adjuvant To 0.5% Hyperbaric Bupivacaine In Subarachnoid Block

The present study aimed at clinical evalution of dexmedetomidine 10 microgm, as an adjuvant to heavy bupivacaine 0.5% (4 ml) in subarachnoid block in patients scheduled for lower abdominal surgeries. Total no. of patients included in the study are 66 who are admitted in orthopaedic ward for lower limb surgeries, who are of ASAgrade I & II and age group between 18-60yrs. All the routine investigations of the patients were done and after complete PAC and preoperative preparations, patients were taken into O.T, all the standard monitoring applied and for subarachnoid block hyperbaric Bupivacaine 0.5% is a dose of 4ml (20mg) combined with or without Dexmedetomidine was administrated according to the assigned study group: 1.Group A- Inj. Bupivacaine- 20mg alone- control group 2.Group B- Inj. Bupivacaine- 20mg with Dexmedetomidine 10mcg-study group Data on onset & offset of sensory & motor block, degree of muscle relaxation, postoperative pain free period were recorded. Dermatome level of block, vitals & drug related complications were also noted. On the basis of observations, following conclusions are drawn: Rapid onset & increased duration of sensory block was seen in Grp B, Onset of motor block & post operative pain free period was prolonged in Grp. B. Sedation score was from 0-2 in study group.Other complications in study group were not significant.

Evaluation and comparison of stress distribution around periodontally compromised mobile teeth splinted with different materials: Three-dimensional finite element analysis

Background: Progressive attachment loss around the teeth because of periodontal disease can result in increased tooth mobility. This adversely affects patient's comfort, function, and esthetics. Periodontal splinting helps in accomplishing stability by redistributing the functional and parafunctional forces. There are various materials that have been used for periodontal splinting. Fiber-reinforced composite, composite resin, and metal-reinforced composite are often used as splinting materials for periodontally compromised teeth. In our study, a comparison was done among these materials for their ability to distribute the stresses at different bone levels in mobile lower incisors splinted together with canines. Materials and Methods: Five patients of age group 25–50 years with Grade 2 and 3 mobile incisors having 40% or more bone loss and firm canines with optimal bone support were selected. From the computed tomography scan of each patient, three models were developed demonstrating splinting of mandibular incisors and canines with metal-reinforced composite, fiber-reinforced composite, and composite resin. So in total, 15 models were developed and each one of them was subjected to vertical and transverse loads of 150 N. Pattern of stress distribution was observed in these models using three-dimensional finite element analysis. Results: After splinting, the stress on the canine increased when bone levels around incisors decreased while stress on incisors reduced. Conclusion: Tested splinting materials were successful in stress distribution, and metal-reinforced composite was found to be better than the other splinting materials.