Journal of Oral Implantology June 2013 - (Page 345)

CLINICAL The Effect of Varying Implant Position in Immediately Loaded Implant-Supported Mandibular Overdentures Mohammed A. Shaarawy, MDSc, DDSc* Ehab M. Aboelross, MDSc, DDSc This study was carried out to evaluate the effect of varying implant position in immediately loaded implantsupported mandibular overdentures on peri-implant bone density, muscle activity, and patient satisfaction. Fourteen completely edentulous patients were selected for the study. After complete denture construction, patients were divided into 2 equal groups. Four dental implants were installed bilaterally in the interforaminal region in the first group, while in the second group, 4 dental implants were inserted bilaterally: 2 in the interforaminal region and 2 in the first molar area. Immediately after suturing, telescopic abutments were screwed to the implants, and the retaining caps were picked up into the fitting surface of the lower denture, which was delivered to the patient. Patients were recalled for radiographic bone density evaluation just after denture delivery and then at 3, 6, and 12 months thereafter. Muscle activities of masseter and temporalis muscles as well as patient satisfaction were also evaluated. The results of the study showed a high success rate approximating 98.2% of the immediately loaded implants. The electromyographic (EMG) records of both muscles in group 1 were significantly higher during chewing hard food after 3 months compared with group 2 (P , .05). Bone density changes were comparable in the 2 groups except at the end of the follow-up period, when group 2 showed a significant increase in peri-implant bone density values of the posteriorly placed implants compared with group 1 (P , .05). From the results of this study, it may be concluded that wide distribution of immediately loaded implants used for supporting mandibular overdentures through posterior placement beyond the interforaminal area results in a favorable response in terms of increased peri-implant bone density as well as decreased EMG activity of masseter and temporalis muscles. Key Words: dental implant position, implant-supported overdenture, immediate loading, telescopic copings, bone density INTRODUCTION I mplant-supported overdentures have gained increased popularity for rehabilitation of completely edentulous patients, providing many of the benefits of conventional toothborne overdentures while negating some of the most troubling problems, such as tooth decay and periodontal disease. Significant endodontic, periodontal, or prosthodontic treatments to maintain teeth as overdenture abutments are not as cost-effective or predictable as the use of implants.1 Faculty of Oral & Dental Medicine, Cairo University, Cairo, Egypt. * Corresponding author, e-mail: muhalysh@hotmail.com DOI: 10.1563/AAID-JOI-D-12-00098 The outcome of implant overdenture treatment is predictably and significantly better than that of conventional complete denture treatment. Patient satisfaction is improved remarkably with implantsupported overdentures. Mandibular implant-supported overdentures result in greater general satisfaction, ease of chewing, stability, and comfort compared with conventional dentures.2,3 To gain total support for the prosthesis, 4 or more interforaminal implants are used in implantsupported mandibular overdentures.4,5 A distally extended cantilever bar up to 10 mm on each side had also been advocated to maximize the retention and stability of the distal component. However, this option could be associated with increased loads on Journal of Oral Implantology 345

Table of Contents for the Digital Edition of Journal of Oral Implantology June 2013

Congratulations to Duke Heller, DDS, MS—Pioneer, Teacher, and Mentor
In Vitro Analysis of Resistance to Cyclic Load and Preload Distribution of Two Implant/ Abutment Screwed Connections
Mandibular Implant-Supported Overdenture: An In Vitro Comparison of Ball, Bar, and Magnetic Attachments
An Exploratory Study on Assessment of Gingival Biotype and Crown Dimensions as Predictors for Implant Esthetics Comparing Caucasian and Indian Subjects
A New Approach to the All-on-Four Treatment Concept Using Narrow Platform NobelActive Implants
Regular and Switching Platform: Bone Stress Analysis With Varying Implant Diameter
Comparison Between Immediate and Delayed Laser-Treated Implants Surface With Switching Platform: A Clinical Retrospective Study
Effect of a Multiporous Beta–Tricalicum Phosphate on Bone Density Around Dental Implants Inserted Into Fresh Extraction Sockets
The Effect of Varying Implant Position in Immediately Loaded Implant-Supported Mandibular Overdentures
Bone Regeneration Around Immediate Implants Utilizing a Dense Polytetrafluoroethylene Membrane Without Primary Closure: A Report of 3 Cases
Socket Preservation and Sinus Augmentation Using a Medical Grade Calcium Sulfate Hemihydrate and Mineralized Irradiated Cancellous Bone Allograft Composite
Implant Placement and Immediate Loading With Fixed Restorations in Augmented Sockets. Five-Year Results. A Case Report
Immediate Placement and Provisionalization With Buccal Plate Preservation: A Case Report of a New Technique
Clinical Importance of Recipient Site Characteristics for Vertical Ridge Augmentation: A Systematic Review of Literature and Proposal of a Classification
Postextraction Implant in Sites With Endodontic Infection as an Alternative to Endodontic Retreatment: A Review of Literature
Letter to the Editor

Journal of Oral Implantology June 2013