This study compares the electromyographic (EMG) activity of the masticatory and accessory muscles in patients with natural teeth and those wearing full-mouth fixed prostheses supported by implants. MethodIn this study, 30 subjects of 30-69 years performed static and dynamic EMG measurements of masticatory and accessory muscles (masseter, anterior temporalis, SCM, and anterior digastric) and were divided into three groups: Group 1 (G1, Control, Dentate), comprising 10 subjects with 14 or more natural teeth (30-51 years of age); Group 2 (G2, single arch implant-supported fixed prosthesis) composed of 10 patients with unilateral edentulism who were successfully rehabilitated with implant-supported fixed prostheses in the maxilla or mandible, restoring occlusion to 12-14 teeth per arch; (39-61 years of age); and Group 3 (G3, full mouth implant-supported fixed prosthesis) with 10 subjects with completely edentulous arches with full mouth implant-supported fixed prosthesis with 12 occluding pairs of teeth (46-69 years of age). The left and right masseter, anterior temporalis, superior sagittal, and anterior digastric muscles were examined at rest, as well as maximum voluntary clenching (MVC), swallowing, and unilateral chewing. On muscle bellies, disposable, pre-gelled silver/silver chloride bipolar surface electrodes were parallel to muscle fibers. BIO-PAKeight® channels recorded electrical muscle activity (Bio-

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Introduction: The study was conducted to assess the stress and displacement effects of a mini-implant supported k-loop on the maxillary dentition for distalization with 3-dimensional (3D) finite element stress analysis. Materials and Methods: A 3D model of the maxilla with all teeth, periodontal ligament, bone, mini-implants, brackets, and archwire was used in this study. The analytic model used in this study like brackets, wire, K-loop, and mini-implants was developed using a reverse engineering technique extracting the dimensional details of the physical parts using precision measuring instruments. Results: The distobuccal movement on the first molar and second molar were 0.26864 mm and 0.00833 mm, respectively. A total of 0.25 mm intrusion movement was seen on distal cusp of the first molar and 0.14 mm extrusion movement seen on mesial cusp of the first molar. A total of 0.25 mm and 0.00260 mm intrusion movement was seen on the distal cusp of the first molar and second molar, respectively. A total of 0.14 mm and 0.00324 mm extrusion movement was seen on the mesial cusp of the first molar and second molar, respectively. Conclusions: There was a large amount of distal displacement of the first molar, also negligible amount of tipping of the first molar and mesial movement of first premolar.

Aim: The aim of the study was to evaluate levels of salivary alpha-amylase (sAA) in plasma and saliva of patients with oral squamous cell carcinoma (SCC). The diurnal patterns of sAA and its response to stress were also determined. Materials and Methods: A randomized clinical study was conducted to evaluate the salivary and plasma levels of sAA in three study groups, containing ten subjects each. sAA concentration in plasma and saliva samples was measured using Bioassay Technology Laboratory human alpha-amylase kits, and the levels were compared among control and test groups. Results: In all groups, the mean plasma α-amylase level and mean saliva α-amylase level show an increasing trend with time, i.e., from morning to night, and among the groups, it was highest in Group III followed by Group II and Group I the least (Group III, Group II, and Group I) at all times with significantly higher mean values in Group III subjects at all times of a day. Conclusion: Alpha-amylase is one of the principal salivary proteins and its secretion is regulated by the sympathetic nervous system. The measurement of salivary alpha-amylase activity has been proposed to reflect stress-related changes in the autonomic nervous system, and it may be a good choice for monitoring sympathetic nervous system activity in specialized subjects. Hence, it can be concluded that salivary sAA levels can be taken as a predictable as well as reproducible marker for oral SCC or premalignant lesions.