Journal of Oral Implantology August 2014 - (Page 418)

RESEARCH Conventional Versus Implant-Retained Overlay Dentures: A Pilot Study of Masseter and Anterior Temporalis Electromyography Mansour Dakhilalian, DMD, MS1 Mansour Rismanchian, DMD, MS1* Akbar Fazel, DMD, MS2 Keyvan Basiri, DMD, MS3 Hamid Azadeh, DMD, MS3 Maryam Mahmoodi, DMD, MS4 Sara Fayazi, DDS, MS5 Pooyan Sadr-Eshkvari, DDS6 Implant-supported overlay dentures (ISODs) have been widely accepted among patients using conventional removable complete dentures (CRCDs). The present study aimed to comparatively study conventional and ISODs in terms of function and coordination of masticatory muscles using electromyograms. Included were 10 patients with ISODs (each with 2 implants in the intercanine area). The mean wave range (MWR) and frequency (MWF) of masseter and temporalis were recorded with (ISOD) and without (CRCD) ball attachments while maximum clenching on cotton rolls (cotton roll clenching), maximum intercuspal clenching (clenching), and unilateral gum chewing (chewing) using electromyography. Data were analyzed in SPAW using t-paired for matched groups and independent-sample t tests for unmatched ones. The MWF differences were not statistically significant with or without attachments (P . .05). Without attachments in place, the MWF of both masseter and temporalis muscles significantly decreased when patients clenched on cotton rolls (P ¼ .01 and .02, respectively) and when chewing unilaterally (both P ¼ .01). With attachments present, the right and left temporalis muscles did not show identical mean wave ranges while chewing (P ¼ .01). Without attachments, this disharmony was seen in the left and right masseter muscles (P ¼ .03). The MWR of masseter was higher in men while chewing with attachments (P ¼ .02). Without attachments, the MWR of temporalis was higher in women while cotton roll clenching (P ¼ .03) and chewing (P ¼ .02). These findings are seemingly in favor of improved masticatory function and coordination in edentulous patients with the application of ISODs. Key Words: dental implants, electromyography, implant-supported overlay dentures, masseter muscle, temporal muscle 1 Dental Implants Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran. 2 Department of Prosthodontics, School of Dental Medicine, Tehran University of Medical Sciences, Tehran, Iran. 3 Department of Neurology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. 4 Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Ahvaz University of Medical Sciences, Ahvaz, Iran. 5 Department of Endodontics, School of Dental Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. 6 Dental Section, Farzan Clinical Research Institute, Tehran, Iran. * Corresponding author, e-mail: swt_f@yahoo.com DOI: 10.1563/AAID-JOI-D-11-00190 418 Vol. XL /No. Four / 2014 INTRODUCTION T he problems with retention and resistance of conventional removable complete dentures (CRCDs) have caused many patients not to be satisfied with their oral functions. Implant-supported overlay dentures (ISODs) are seemingly proper treatment alternatives for this group, who have

Table of Contents for the Digital Edition of Journal of Oral Implantology August 2014

Helping, Rather Than Criticizing, a Colleague May Lead to a Lifetime of Referrals
Utilization of Ethyl Cyanoacrylate and 2-Octyl Cyanoacrylate Adhesives for Autogenous Bone Graft Fixation: Histomorphometric Study in Rats
Conventional Versus Implant-Retained Overlay Dentures: A Pilot Study of Masseter and Anterior Temporalis Electromyography
Axial Relationship Between Dental Implants and Teeth/Implants: A Radiographic Study
The Effect of Dynamic Loading on Bacterial Colonization of the Dental Implant Fixture–Abutment Interface: An In Vitro Study
Longitudinal Implant Stability Measurements Based on Resonance Frequency Analysis After Placement in Healed or Regenerated Bone
A Clinical Report on the Use of Closed-Tray, Hex-Lock-Friction-Fit Implant Impression Copings
Immediate Restoration of NobelActive Implants Placed Into Fresh Extraction Sites in the Anterior Maxilla
Clinical Study of Flap Design to Increase the Keratinized Gingiva Around Implants: 4-Year Follow-Up
Use of Subepithelial Connective Tissue Graft as a Biological Barrier: A Human Clinical and Histologic Case Report
Calvarial Autogenous Bone Graft for Maxillary Ridge and Sinus Reconstruction for Rehabilitation With Dental Implants
Staged Ridge Splitting Technique for Horizontal Expansion in Mandible: A Case Report
An Overview of Zirconia Dental Implants: Basic Properties and Clinical Application of Three Cases
Dental Gypsum Verification Jig to Verify Implant Positions: A Clinical Report
Platelet-Rich Preparations to Improve Healing. Part I: Workable Options for Every Size Practice
Platelet-Rich Preparations to Improve Healing. Part II: Platelet Activation and Enrichment, Leukocyte Inclusion, and Other Selection Criteria

Journal of Oral Implantology August 2014