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-

No abstract

Periodontal therapy is aimed at achieving restoration of tissues lost due to periodontal disease. The ultimate goal is regeneration of cementum, periodontal ligament, and alveolar bone. There has been a constant effort to improve predictability by introduction of newer techniques. Guided tissue regeneration (GTR) is a promising method to achieve predictable periodontal regeneration. GTR allows and provides space for repopulation of certain cells on denuded root surface to enhance new attachment. One of the limitations of all regenerative procedures is low predictability but selection of cases and operator's skill yields better regeneration. This review discusses the principle, material science and applications of GTR

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.

The placement of orthodontic appliances influences plaque growth and maturation. Significant differences in biofilm formation and periodontal reaction between different bracket types and between bonded teeth compared with control teeth have been reported, however, have reported significant attachment loss during orthodontic treatment.In patients with a history of periodontitis resulting in displaced teeth, possible orthodontic tooth movements include changes in alignment, space redistribution, and intrusion. To see the changes in clinical periodontal parameters after removal of fixed orthodontic appliancesAfter debonding of braket at dental clinic and before final polishing, probing depth (PD), plaque index (PI), gingival index (GI) and bleeding on probing (BOP) were assessed on the first molars and central incisors of both arches. Probing depth decreased in the right maxillary first molar. Plaque index and gingival index also got deceased. Bleeding on Probing reduced significantly. Buccal probing depth returned to < 3 mm in the first month and interproximal depth in the second month. The mean gingival index was 0.5 after 2 months. Bleeding on probing in half of the teeth was negative after the first month and in other half in the second month.