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Introduction A pilonidal sinus (PNS) is a small passageway in the subcutaneous tissue which develops most frequently in the sacrococcygeal area. In terms of postoperative outcomes, the decision on the best surgical treatment for PNS is still a challenge for a surgeon. Prevention of the disease recurrence and improving quality of the life can be considered primary goals of the treatment. The current study intends to compare two commonly practiced surgical treatments for PNSes-Rhomboid excision with Limberg flap repair against wide-open excision with healing by secondary intention. Methods In a prospective randomized study, 50 patients with sacrococcygeal PNS were divided into two groups. Group A was operated by rhomboid excision with Limberg flap reconstruction and Group B was operated by wide-open excision and healing by secondary intention. Data were collected on a specially designed structured proforma and consisted of patient demographics, medical history, presentation, and postoperative complications assessed for a period of 6 months. Comparative outcomes of interest were postoperative pain, postoperative anxiety, duration of wound healing, duration of work loss, presence of wound infection, and recurrence. Results Mean age of 28 years was observed across the study with a male preponderance (76%). The mean visual analog scale (VAS) score for pain was greater in Group A during the early postoperative period, i.e., days 1, 3, and 7. However, patients in Group B reported a mean VAS score of 3 ± 0 and 1 ± 0 at one month and 2 months, respectively indicating a longer duration of postoperative pain overall. Patients in Group B also reported a significantly higher VAS for anxiety (VAS-A) score for postoperative anxiety/stress in all the follow-up visits. The mean healing time was 20 ± 2 days in Group A and 57 ± 11 days in Group B showing a significant difference. Duration of work loss was also significantly higher in Group B (31 days). Five patients in Group B developed wound infections. No recurrence was observed across both the groups in this study. Conclusion According to the findings of this study, the Limberg flap method outperforms the wide-open excision approach in terms of healing duration, work loss days, postoperative pain, anxiety, and wound infection. Both the techniques, however, are comparable in terms of recurrence.
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AIMS: This study aimed to analyze the effect of different investment techniques and pattern materials on the surface roughness of raw castings from nickel-chromium alloy. SETTINGS AND DESIGN: This is an experimental in vitro study carried out in Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharastra. MATERIALS AND METHODS: Sixty square-shaped wax patterns, measuring 10 mm × 10 mm × 2 mm, were divided into four groups. A phosphate-bonded investment material (Bellasun, Bego, Germany) was used to invest 15 samples of inlay wax and kept under normal atmospheric pressure and the remaining 15 wax patterns were invested under a pressure of 3 bars for 30 min, and then allowed to bench set for another 30 min. The same investing techniques were carried out for the remaining thirty samples made from pattern resin. STATISTICAL ANALYSIS USED: The surface roughness (µm) of the castings was measured by a profilometer. Student's "unpaired t-test" was used for the statistical analysis. RESULTS: Specimens that were invested at atmospheric pressure had significantly more surface roughness (µm) values than those invested under increased pressure (P < 0.01). CONCLUSIONS: Wax patterns exhibited the least surface roughness when invested under pressure and can be recommended as the material and technique of choice. In addition, resin patterns invested under increased pressure produced smoother casting surface than those invested at atmospheric pressure, and the difference is highly significant.
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INTRODUCTION: Acrylic resins have been used extensively for the fabrication of denture bases because of their aesthetic qualities, ease of manipulation and repairability. Flexural fatigue of the denture base has been shown to be a factor in the clinical failure of polymethyl methacrylate resin dentures. Also, the fracture can result from impact, fatigue or degradation of the base material. Hence, there is a need to increase the strength of denture base resins. AIM: To evaluate the effect of reinforcing alumina oxide filler on the flexural strength of different acrylic resins. MATERIALS AND METHODS: A total of 180 acrylic specimens were fabricated, which were divided into three groups self cure acrylic resin (SC), conventional heat cure resin (HC) and high strength heat cure resin (HI). Each group was divided into four subgroups i.e., control group and the specimens of the remaining three groups were reinforced with aluminum oxide (Al2O3) powder by 5%, 10% and 15% by weight. Specimens were stored in distilled water for one week; flexural strength was tested by universal testing machine. Results were analysed by one-way analysis of variance and post-hoc Tukey paired group comparison tests. RESULTS: Flexural strength of SC increased by 9%, 13% and 19%, Flexural strength of HC increased by 8%, 15% and 19% and that of HI increased by 21%, 26% and 29% compared to control group by adding 5%,10% and 15% of alumina filler (p-value <0.001). Addition of 15% of alumina powder to SC showed high flexure strength compared to control group of HC (p-value <0.001). Addition of 10% and 15% of alumina powder to HC showed high flexural strength compared to control group of HI (p-value <0.001). CONCLUSION: Addition of alumina to self cure acrylic resin, conventional heat cure acrylic resin and high strength heat cure acrylic resin increased the flexural strength. Increasing the flexural strength of the acrylic resin base material could lead to more clinical success.