Biting Force and Chewing Efficiency of Complete Dentures.
NCT ID: NCT04793503
Last Updated: 2021-09-05
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
27 participants
INTERVENTIONAL
2020-02-20
2020-12-02
Brief Summary
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Detailed Description
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To reduce the effect of order of treatment on MBF, were successively given the following prosthesis i) complete dentures fabricated by the conventional technique ii) 3D printed complete dentures iii) milled complete dentures in a random order.
Construction of the CADCAM 3D printed denture The same steps of the conventional technique will be performed till the adjustment of occlusion rims then in the dental laboratory, the maxillary and mandibular definitive casts and the occlusal rims will be prepared for scanning with scan spray. Scanning will be performed with an optical 3D scanner . The files from the laser-scan will be translated into stereolithography (STL) files and the CDs are virtually designed in ExoCad software. After minor modifications in the positions of teeth were made, fabrication of the dentures will be approved and the digital denture base will be fabricated using 3D printing technique from Dental Pink resin
Construction of the CAD/CAM milled denture Once the complete denture has been virtually designed in CAD software (ExoCad software) a preview will be sent for evaluation using 3D viewing software. After minor modifications in the positions of teeth were made, fabrication of the dentures will be approved. The digital denture will be fabricated by the command software of the milling machine (ExoCad 5x milling machine) from prepolymerized resin acrylic pucks and the teeth (TSM Acetal Dental) were milled into template .After that the denture will be finished and polished according to the traditional procedures For all groups, after placement, clinical evaluations of the fit, retention, stability, occlusal relationship, esthetics, and phonetics were performed. Assessment of the occlusion was made with articulating paper, chairside adjustments were made and premature contacts were corrected. The patient was given a proper program for denture insertion and oral hygiene measures.
Assessment of biting force
* This will be made by using a custom-made device composed of Flexiforce A 301® force sensor and Arduino microcontroller with a crystal display. The sensor is calibrated by known weight object for several times, and the sensor is covered by 3 mm layer of putty rubber base material.
* Readings will be performed at 1 week, 1 month and 3 months follow-up periods. Assessment of chewing efficiency The chewing efficiency will be evaluated according to the procedure described by Schimmel et al. (2007) using a chewing gum. Specimens will be prepared from two colored gums one with the flavor "Sour Berry" (white color) and the other with the flavor "Fancy Fruit" (orange color). Two strips of a standard size (30 9 18 9 3 mm) will be cut from each gum and manually stuck together. Patients will be instructed to chew five samples of gum on their preferred chewing side for 5, 10, 20, 30 and 50 cycles, respectively. Between the different tests, an interval of at least 1 min will be imposed to reduce the effect of fatigue. The total duration of the experiments was approximately 8 min.
After chewing, the samples will be then spat into transparent plastic bags, which The samples will be then scanned from both sides with a of resolution 500 dots per inch. The numbers of selected pixels will be recorded from the histogram for each side, and mean of those figures will be calculated. To assess the reproducibility of chewing, the subjects will be available to repeat the experiments on a different day.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
TREATMENT
SINGLE
Study Groups
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conventional complete denture
the patients receive conventional complete denture constructed from heat cure acrylic resin
conventional complete denture
the complete denture constructed by packing technique
CADCAM 3D printed denture
the patients receiveCADCAM 3D printed denture constructed by using printing machine
CADCAM 3D printed denture
The files from the laser-scan will be translated into stereolithography (STL) files and the CDs are virtually designed in ExoCad software
CAD/CAM milled denture
the patients receiveCADCAM 3D printed denture constructed by using milling machine
CAD/CAM milled denture
Once the complete denture has been virtually designed in CAD software (ExoCad software) a preview will be sent for evaluation using 3D viewing software
Interventions
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conventional complete denture
the complete denture constructed by packing technique
CADCAM 3D printed denture
The files from the laser-scan will be translated into stereolithography (STL) files and the CDs are virtually designed in ExoCad software
CAD/CAM milled denture
Once the complete denture has been virtually designed in CAD software (ExoCad software) a preview will be sent for evaluation using 3D viewing software
Eligibility Criteria
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Inclusion Criteria
* Normal alveolar ridge volume
* No temporomandibular joint disorders
* No heart disease
* No systemic diseases that affect the complete denture treatment procedures
Exclusion Criteria
* TMJ disorders
* Any systemic disease interfering with complete denture treatment
50 Years
65 Years
ALL
Yes
Sponsors
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Kafrelsheikh University
OTHER
Responsible Party
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Nourhan Ahmed Ragheb
lecturer of prosthodontics
Locations
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Faculty of Dentistry , Kafr El Shiekh University
Kafr ash Shaykh, , Egypt
Countries
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Other Identifiers
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KD/07/21
Identifier Type: -
Identifier Source: org_study_id
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