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
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