Biology Agriculture Aquaculture Horticulture Postharvest Forestry Geography Environment Health

Chewing efficiency and electromyographic activity of masseter muscle with three designs of implant-supported mandibular overdentures. A cross-over study

submitted by majtobo 1 year and 6 months ago
The aim of this study was to compare the effect of three designs for implant-supported mandibular overdenture on the chewing efficiency and electromyographic (EMG) activity of masseter muscles. Eighteen edentulous patients received new maxillary and mandibular dentures (control, CD) before implant placement. After using the dentures for 3 months, patients were randomly divided into six blocks (three patients/block) and received four implants in canine and first molar areas of the mandible. Following osseointegration period, new duplicate mandibular overdentures were successively connected to the implants with: (i) ball attachment on two implants (2BOD), (ii) bar attachment on two implants (2ROD), and (iii) bar attachments on four implants (4ROD) in a random order. Chewing efficiency was measured using chewing gum, and EMG was recorded during clenching (with or without food). Evaluations were made 3 months after using each of the following prostheses: CD, 2BOD, 2ROD, and 4ROD. All implant-supported overdentures showed a significant increase in chewing efficiency and EMG values when compared to CD. These values increased significantly with 4ROD when compared to 2BOD or 2ROD prostheses. There was no significant difference in chewing efficiency and EMG between 2BOD and 2ROD prostheses. Four-implant-supported overdentures seem to present a functional advantage vs. two-implant-supported overdentures, independent of the chosen attachment system.

Topic: Health

Add your comment

Please Login or Signup to leave a comment

Related stories

Implant-supported Mandibular Overdentures in Very Old Adults: A Randomized Controlled Trial
submitted by mclezodo 10 months ago - Topic: Health
The purpose of this study was (1) to investigate denture satisfaction following the conversion of existing mandibular complete dentures to implant overdentures (IOD) in very old edentulous patients who depend on help for activities of daily living and to evaluate secondary end points, such as functional, structural, nutritional, and patient-centered aspects. For this randomized clinical trial, ...

Electromyographic assessment of jaw muscles in patients with All-on-Four fixed implant-supported prostheses
submitted by eve 2 years and 1 month ago - Topic: Health
This study evaluated the electromyographic (EMG) characteristics of masticatory muscles in patients with fixed implant-supported prostheses according to All-on-Four® principles and in control healthy dentate subjects. Twenty-six subjects aged 50–74 years were examined. Eighteen were edentulous and had been successfully rehabilitated with (i) mandibular All-on-Four® implant-supported fixed ...

Use of a single implant to retain mandibular overdenture: A preliminary clinical trial of 13 cases
submitted by poloetat 2 years and 2 months ago - Topic: Health
Given that many patients find the cost of mandibular rehabilitation through complete overdenture implants to be beyond their financial scope, many seek a more affordable treatment. The aims of this study were to compare the clinical outcomes of single mandibular implant-retained overdentures versus that of complete dentures. Thirteen edentulous patients with a mean age of 71 years were enrolled...

All on Four® Fixed Implant Support Rehabilitation: A Masticatory Function Study
submitted by girordamx 1 year and 8 months ago - Topic: Health
Fixed implant-supported prostheses according to All-on-Four® (Nobel Biocare, Goteborg, Sweden) principles have become an accepted treatment modality in totally edentulous patients, whereas the functional effect of this therapy is limited. The purpose of this study was to evaluate the muscular function of patients totally rehabilitated with All-on-Four. Materials This study evaluated 63 patient...

Regional variation in IIM myosin heavy chain expression in the temporalis muscle of female and male baboons (Papio anubis)
submitted by vanpoa 1 year and 10 months ago - Topic: Health
The purpose of this study was to determine whether high amounts of fast/type II myosin heavy chain (MyHC) in the superficial as compared to the deep temporalis muscle of adult female and male baboons (Papio anubis) correlates with published data on muscle function during chewing. Electromyographic (EMG) data show a regional specialization in activation from low to high amplitude activity during...

Comparison between the rhythmic jaw contractions occurring during sleep and while chewing
submitted by smollcety 1 year and 3 months ago - Topic: Health
The masticatory central pattern generator (CPG) may be implicated in the pathophysiology of sleep bruxism (SB). The aim of this study was to compare rhythmic masticatory muscle activity (RMMA) occurring during sleep related to SB with that of natural voluntary chewing in a sample of sleep bruxers. It was hypothesized that the pace of RMMA during sleep is correlated with the chewing pace. Electr...

Effect of chewing on dental patients with total denture: an experimental study
submitted by zhinhi92 1 year and 7 months ago - Topic: Health
In this study, we have explored the prospect of assessing and following level of total denture adaptation by use of EMG signals recorded during gum chewing. Total of 14 edentulous patients, 6 women and 8 men, with an average age of 63+/-9 years, were recruited. Separate EMG recordings were obtained from left and right temporalis and masseter muscles of the patients for a period of 10 seconds, w...

The influence of occlusion on masticatory performance and satisfaction in complete denture wearers
submitted by orwol 1 year and 9 months ago - Topic: Health
Complete dentures should satisfy patients' needs for comfort, function and aesthetics. Thirty edentulous patients were enrolled in this study. Two sets of complete dentures were made for each patient: one with bilaterally balanced occlusion and the other with lingualised occlusion. The patients used each type of denture for 6 months. A single-blind study design was used in which the patients w...

Avaliação da influência da posição da cabeça nos potenciais bioelétricos dos músculos mastigatórios
submitted by dpspiocack 1 year and 2 months ago - Topic: Health
Este estudo teve como objectivo averiguar a influência que a posição da cabeça, durante a mastigação, poderá ter a nível do complexo crânio-cérvico-mandibular, nomeadamente a nível dos músculos da mastigação. O estudo envolveu 21 indivíduos, estudantes da Faculdade de Medicina Dentária da Universidade do Porto, saudáveis, sem distúrbios temporomandibulares (confirmado pelo Res...

Within-Subject Comparison of Maxillary Implant-Supported Overdentures with and without Palatal Coverage
submitted by sotesh 1 year and 1 month ago - Topic: Health
The purpose of this study was to compare patient-reported outcomes for maxillary implant-supported overdentures with and without palatal coverage.Twenty-one maxillary edentulous patients (six women, 15 men) were included. In total, 42 implants were inserted in the anterior maxilla. All patients received implant-supported overdentures on two retentive anchors with palatal coverage for 2 months. ...

The effect of denture stability on bite force and muscular effort
submitted by bass7412 3 years and 10 months ago - Topic: Health
This study tested the hypothesis that denture instability limits the amount of voluntary muscular effort generated by denture wearers. Seventeen edentulous subjects (seven men, 1 women; mean age 6·3 ± 13· years) with newly acquired implant-retained mandibular overdentures and a conventional maxillary denture participated. Maximum bite forces and corresponding electromyographic (EMG) activ...

The effect of different attachment systems with implant-retained overdentures on maximum bite force and EMG
submitted by creckit 4 years and 2 months ago - Topic: Health
To compare the effect of different attachment systems with implant-retained overdentures on maximum bite force and muscle activity using electromyography (EMG).: Denture retention and stability is of considerable interest in prosthetic dentistry. Thirty-five patients were examined: 15 edentulous patients treated with mandibular implant-retained overdentures (MIRO) and maxillary dentures (MCD) (...

Chewing-induced regional brain activity in edentulous patients who received mandibular implant-supported overdentures: A preliminary report
submitted by moresiminord 3 years and 11 months ago - Topic: Health
Used functional magnetic resonance imaging (fMRI) to investigate the change in brain regional activity during gum chewing when edentulous subjects switched from mandibular complete dentures to implant-supported removable overdentures.   Four edentulous patients (3 males and 1 female, aged 64 to 79 years) participated in the study. All subjects received a set of new maxillary and mandibular co...

Relationship between stage II transport and number of chewing strokes as mastication progresses
submitted by wmotlock 1 year and 1 month ago - Topic: Biology
As mastication progresses, little is known about the occurrence of the stage II transport (oro-pharyngeal bolus transport). This study aimed to investigate the relationship between stage II transport and bolus aggregation in the pharynx and the number of chewing strokes. Twenty-five clinical residents with natural dentitions were recruited. The subjects were asked to chew gummy jelly with their...

Immediate effect of an elastomeric oral appliance on the neuromuscular coordination of masticatory muscles: a pilot study in healthy subjects
submitted by olsefi 4 years and 3 months ago - Topic: Health
To compare the electromyographic characteristics of masticatory muscles with and without a new elastomeric oral device proposed for masticatory muscle training, 1 healthy subjects aged 23 to 32 were examined. Surface electromyography of masseter and temporal muscles was performed during maximum teeth clenching without and with the device and during unilateral chewing with either gum or the devi...

Motor coordination of masseter and temporalis muscle during mastication in mice
submitted by bshodi 3 years and 6 months ago - Topic: Health
Mice have been increasingly used to study the stomatognathic function, since genetically modified mice are expected to enhance our understanding of neural and motor disorders of the craniomandibular system. However, fundamental characteristics of jaw movements in mice have not been fully understood. In the present study, the jaw movement of mice during chewing foods of different textures was an...