Comparison of Masticatory Efficiency Between Complete Denture With Zero-degree Teeth and Anatomic Teeth in Patients With Severely Resorbed Ridge

Not Applicable

• Conditions: Edentulous
• Interventions: Device: zero degree teeth; Device: anatomic teeth

• Registration Number: NCT02359955
• Lead Sponsor: Haixin Qian

Brief Summary

This study aims to evaluate masticatory efficiency of the zero-degree teeth complete denture in treatment of edentulous patients of severely resorbed ridge.Patients will be crossed over to be treated with zero-degree teeth complete denture and anatomic teeth complete denture. For each patient, the masticatory efficiency and electromyography with different denture will be recorded and analysis.

Detailed Description

Not available

Study Timeline

• Study Start: 2014-06
• Study First Submitted: 2015-01-23
• Study First Submitted QC: 2015-02-04
• Study First Posted: 2015-02-10
• Results First Submitted: 2015-03-07
• Results First Submitted QC: 2015-04-08
• Results First Posted: 2015-04-09
• Status Verified: 2015-05
• Primary Completion: 2015-05
• Last Update Submitted: 2015-05-01
• Last Update Posted: 2015-05-20

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• complete edentulism for at least three months class Ⅳ ridge

Exclusion Criteria

• neuromuscular dysfunction, psychiatric disorder,

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Zero-Degree Teeth, then Anatomic Teeth	zero degree teeth	edentulous patients who were first treated with zero-degree teeth complete denture, then with anatomic teeth complete denture
Zero-Degree Teeth, then Anatomic Teeth	anatomic teeth	edentulous patients who were first treated with zero-degree teeth complete denture, then with anatomic teeth complete denture
Anatomic Teeth, then Zero-Degree Teeth	anatomic teeth	edentulous patients who were first treated with anatomic teeth complete denture, the with zero degree teeth complete denture
Anatomic Teeth, then Zero-Degree Teeth	zero degree teeth	edentulous patients who were first treated with anatomic teeth complete denture, the with zero degree teeth complete denture

Primary Outcome Measures

Name	Time	Method
EMG (Masseters EMG Are Recorded After Patient Wears Complete Denture for Three Months)	three month	the masseters EMG are recorded after patient wears complete denture for three months,EMGs of masseters of 20 chewing strokes were recorded in term of value of amp and duration, duration here is reporteds the average value from 20 chewing strokes in units of "millisecond".

Secondary Outcome Measures

Name	Time	Method
Masticatory Efficiency Index	three months	the masticatory efficiency is tested after patient wears complete denture for three months,each patient was given 4 gram dry peanuts, chewed for 20 seconds, then spat in the receptacle and rinsed mouth residue. The peanut particles were diluted to 1000 ml with distilled water, stirred for 1 minutes and standing for 2 minutes to suspension. Absorbance values(av) were measured at the wavelength of 590nm in a spectrophotometer. The higher the masticatory efficiency, the smaller the peanut particles, then the higher the av value, vice versa. Value of av was used to represent masticatory efficiency. For each patient, the test was conducted three times, and the average value of av was taken as the final result. A lower masticatory efficiency index indicates larger peanut particle size observed.