Background: With the advance of the dental implants, the retention and stability of mandibular complete denture have been improved to a large extent. The implants could be placed interforaminally or in anterior and posterior ridge areas. The placements of the implant in the molar area increase denture support that reflects on improvement in patient mastication and muscles activity. Aim: This study was conducted to evaluate the effect of the distribution of the miniimplants (MIs) on electromyographic (EMG) activity of masticatory muscles and overall patient satisfaction. Materials and Methods: Ten completely edentulous male patients with severely resorbed mandibular ridge were enrolled in this study. Patients were randomly divided into two equal groups. Group (I and II) according to the MIs and distribution pattern. Group (I): Five patients had received four mini-dental implants in interforaminal area. Group (II): Five patients had received four mini-dental implants (two implants in the interforaminal area and two implants in the molar areas). All patients had received implant overdentures. Overdentures were connected to the MIs with O-ring attachments. For each patient, the EMG activity of masticatory muscles and a survey of therapeutic satisfaction before and after connection to the MIs was evaluated. Results: The MI-retained overdentures of the Group II in which the implants placed in the interforaminal area and molar areas showed significant lower EMG values than Group I with soft and hard foods as well as clenching. Conclusions: The distribution of MIs plays a role in the muscle activity, and the placement of implants in the molar area improves the muscle activity and patient satisfaction. Clinical Significance: The placement of MIs to retain mandibular complete denture improves muscles activity and patient satisfaction, particularly, if placed in both anterior and molars areas.
Aim: The purpose of this study was to examine changes in relative electromyographic (EMG) activities of temporal and masseter muscles after relining the dentures with soft,hard and conventional heat cured based denture liners. Materials and Methods: Conventional complete dentures were fabricated for 30 edentulous patients. They were divided into three groups. Group I including patients received denture relined with soft liner. Group II including patients received denture relined with hard liner and Group III including patients received dentures relined with conventional heat cured relining material Electromyography of the masseter and temporalis muscle was recorded during eating carrot as hard food and banana as soft one. The records were measured after one, three and six months. Data was analyzed using Statistical ANOVA test to compare between muscle activities of the three groups Duncan's test was used for pair-wise comparisons to determine the differences between means. Results: Complete denture relined with soft liner showed significant difference in masseter and temporalis muscles activities as compared with the two other groups. Conclusion: Complete denture relined with soft liner show better effect on masseter and temporalis muscles activity and patient satisfaction.
Background:The conventional method of complete denture fabrication has many problems that include lack of uniform distribution of occlusal forces to the basal seat, causing inflammation, ulcers in the supporting tissues, more rapid residual ridge resorption, increase patient discomfort, increase parafunctional movements, and the need for frequent adjustments. Aim: The aim of this study is to evaluate and compare the effect of two different fabrication techniques for complete over dentures supported by mandibular implants. Methodology: A total of 24 edentulous subjects were eligible for inclusion. Using a random sampling system, conventional or Schlosser's technique was used to fabricate the dentures. Two implants were placed in the canine area of all patients. After 3 months, ball attachments were connected to the implants, and the denture delivered with the retentive components incorporated in the denture base. At the follow-up examinations, implant stability and marginal bone loss were evaluated at 3, 6, and 12 months. Results: The sample of 24 patients, with a mean age of 55.2 years, was included in this study. All patients attended the 12-month follow-up. The complete denture fabricated by Schlosser's technique showed significant more implant stability and less bone loss when compared to conventionally fabricated dentures. Conclusion: The Schlosser's technique is considered as predictable methods of complete denture construction. Consequently, this technique has a positive effect on the implants that supported mandibular overdenture. The more harmonious occlusion result from this technique results in better implant stability and decreases the rate of bone loss around the implants. Clinical Significance: The denture fabricated with Schlosser's technique results in more harmonious occlusion that suggested as one requirement of successful dental implants.
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