HealthyNCT00172692
Observation and Evaluation of Chewing Velocity Changes on Soft Food Chewing Efficiency
An observational study of Healthy and Mastication, run by National Taiwan University Hospital at 1 site in Taiwan.
Trial summary
Soft food chewing does not require strong bite force. The number of chewing strokes and occlusal surface area of the posterior teeth are more important. Clinically, reduction of occlusal surface to protect the abutments of a fixed or removable partial denture or the implant supported teeth is often necessary. Read more about this study
- Who is it for?
- Ages 20 to 30 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy, Mastication
- How many people
- Not given
- Where
- 1 siteTaiwan
- Study dates
- Jul 2004to Aug 2004
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 30 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Dental students
- Healthy masticatory system
Who cannot join
None listed.
Trial locations and contacts
1 site in 1 country.
About this study
Soft food chewing does not require strong bite force. The number of chewing strokes and occlusal surface area of the posterior teeth are more important. Clinically, reduction of occlusal surface to protect the abutments of a fixed or removable partial denture or the implant supported teeth is often necessary. If a certain chewing ability is maintained with reduced occlusal area, changing chewing velocity might help. For this hypothesis, the effect of chewing velocity on soft food chewing ability would be observed first. The purpose of this study is to evaluate the deliberately changed chewing gum chewing velocity on the chewing ability of healthy subjects whose dental occlusal surface area is known. Twenty dental students (10 men and 10 women with an age range of 20-30 years) with healthy masticatory systems and complete dentition will be asked to chew HA containing chewing gum with habitual side teeth at the cycle time of 0.5 sec, 1.0 sec and 1.5 sec for 30, 40, and 50 times. Jaw movement, tooth contact, and muscle activities will be observed during chewing gum chewing. The distribution of HA particles in the gum bolus after each chewing session will be measured and regarded as the chewing efficiency of that subject. Occlusal surface area of the maxillary posterior teeth, chewing rate, chewing time, muscle activity and jaw lateral displacement will be related to the chewing efficiency with multiple regression analysis. The effects of practice due to changing of chewing rate will also be evaluated.
Read the detailed description
- HA containing chewing gum with habitual side teeth at the cycle time
- The distribution of HA particles in the gum bolus after each chewing session will be measured and regarded as the chewing efficiency of that subject.
National Taiwan University Hospital, National Science Council
- Conditions
- Healthy, Mastication
- Keywords
- Chewing efficiency,, Gum chewing, Chewing velocity, Occlusal surface area, EMG, Jaw movement
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Sep 2005 (estimated)
- Study startJul 2004
- Study completionAug 2004
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for HealthyStudies of the same condition, open and under way.
- More trials run by National Taiwan University HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Time perspective
- Other
Sponsor and investigators
- Lead sponsor
- National Taiwan University Hospital
- Sponsor type
- University, hospital or other
- Investigators
- Yuh-Yuan Shiau, Professor, Study chair, National Taiwan University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00172692
- Sponsor's protocol ID
- 9361701237
- Status last verified
- Jun 2005
- First submitted
- 12 Sep 2005
- Last updated
- 15 Dec 2006
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 Dec 2006. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Observation and Evaluation of Chewing Velocity Changes on Soft Food Chewing Efficiency
- ClinicalTrials.gov ID
- NCT00172692
- Acronym / sponsor ID
- 9361701237
- Conditions
- Healthy, Mastication
- Keywords
- Chewing efficiency,, Gum chewing, Chewing velocity, Occlusal surface area, EMG, Jaw movement
- Study type
- Observational
- Recruitment status
- Completed
- Lead sponsor
- National Taiwan University HospitalUniversity, hospital or other
- Study start
- Jul 2004
- Study completion
- Aug 2004
- First posted
- 15 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Soft food chewing does not require strong bite force. The number of chewing strokes and occlusal surface area of the posterior teeth are more important. Clinically, reduction of occlusal surface to protect the abutments of a fixed or removable partial denture or the implant supported teeth is often necessary. If a certain chewing ability is maintained with reduced occlusal area, changing chewing velocity might help. For this hypothesis, the effect of chewing velocity on soft food chewing ability would be observed first. The purpose of this study is to evaluate the deliberately changed chewing gum chewing velocity on the chewing ability of healthy subjects whose dental occlusal surface area is known. Twenty dental students (10 men and 10 women with an age range of 20-30 years) with healthy masticatory systems and complete dentition will be asked to chew HA containing chewing gum with habitual side teeth at the cycle time of 0.5 sec, 1.0 sec and 1.5 sec for 30, 40, and 50 times. Jaw movement, tooth contact, and muscle activities will be observed during chewing gum chewing. The distribution of HA particles in the gum bolus after each chewing session will be measured and regarded as the chewing efficiency of that subject. Occlusal surface area of the maxillary posterior teeth, chewing rate, chewing time, muscle activity and jaw lateral displacement will be related to the chewing efficiency with multiple regression analysis. The effects of practice due to changing of chewing rate will also be evaluated.
Detailed description
- HA containing chewing gum with habitual side teeth at the cycle time
- The distribution of HA particles in the gum bolus after each chewing session will be measured and regarded as the chewing efficiency of that subject.
National Taiwan University Hospital, National Science Council
Study design
- Time perspective
- Other
Who may qualify
- Ages
- 20 to 30 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (2 listed)
- Dental students
- Healthy masticatory system
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 Dec 2006.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Yuh-Yuan Shiau, Professor study chair
National Taiwan University Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Healthy and Mastication, run by National Taiwan University Hospital at 1 site in Taiwan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 0 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 15 Dec 2006. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Taiwan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Dec 2006.