Clinico-Radiographic Research Evaluating Crestal Bone Level and Bone Density Surrounding Dental Implants.

Aim: Planning the surgical operation, choosing the type of implant, and the effectiveness of the implant all heavily rely on the quantity and quality of the accessible bone. This study's goal was to determine how promptly inserted dental implants affected postoperative changes in bone density and crestal bone level by Cone bean computed tomography (CBCT) gray-scale value during a follow-up of three to six months. Method: A prospective clinical-radiographic investigation was conducted. Twenty participants with a partly edentulous arch who were also systemically healthy were chosen from the OPD of the Department of Periodontics and Oral Implantology. Each patient's oral hygiene status was noted, and a preoperative CBCT was performed to assess bone density. The following clinical parameters were noted before surgical procedures: plaque index (PI) (Silness and Loe, 1964), gingival index (GI) (Loe and Sillness, 1964), probing pocket depth (PPD), and primary stability. Result: A weak connection between Hounsfield unit (HU) in three months and six months was found. Moreover, a slender positive connection between baseline primary stability and three months was found. PI was shown to have a statistically significant difference between the means at several follow-ups (P value of 0.0001). PI and probing depth were not statistically different between baseline and six months (P values = 0.0001) or between three months and six months (P values = 0.050), respectively. Conclusion: The main outcome of this study shows that insertion torque is directly proportional to bone density and crestal bone level.

A Comparison of the Marginal Accuracy of Metal Copings Made with Three Different Brands of Nickel-Chromium Alloys and Various Sprue Designs: An Vitro Study.

Introduction: It is important to construct the sprue in a way that ensures that the mold gets an appropriate supply of metal at the right speed. Many manufacturers now offer sprue designs that have not been advocated in textbooks or publications for their normal use. Aim: The goal of this research was to compare the sprue design's marginal fit to that of the other designs. Methods: During this investigation, we attempted to see whether the fabrication of metal copings could be improved. Three sprue designs were used in this research for the assessment of casting accuracy: normal cylindrical, funnel-shaped, and cuboidal or flattened sprue forms. Results: The mean marginal disparity of nickel-chromium (Ni-Cr) alloy copings made by three distinct brands was determined to be statistically insignificant. Conclusion: Within the limitation of the study, it was concluded that the marginal accuracy of metal copings fabricated with three different brands of Ni-Cr alloy did not reveal a statistically significant result. However, out of the three different sprue designs, that is, cylindrical, cuboidal, and funnel shape, the marginal accuracy of cylindrical and cuboidal sprue designs was found to be better than that of the funnel shape sprue design because the funnel shape sprue design is narrow at the point of attachment, thereby increasing the flow pressure and decreasing the turbulence of the molten metal.