Comparative Evaluation of an Electrical Impedance Device Versus Digital Radiography in Estimation of Remaining Dentin Thickness

Study Overview
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Brief Summary
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The research question was that in patients with carious posterior permanent teeth, would the electrical impedance device be as valid as digital radiography in estimation of remaining dentin thickness? The proposed hypothesis was null.

Official Title
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Comparative Evaluation of an Electrical Impedance Device Versus Digital Radiography in Estimation of Remaining Dentin Thickness in Carious Posterior Permanent Teeth (Diagnostic Accuracy Trial)

Conditions
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Caries,Dental, Deep Caries

Intervention / Treatment
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* Diagnostic Test: electrical impedance device,
* Diagnostic Test: Reference test: Digital Radiographic examination


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Participants eligible for this study were those aged from 18 y to 28 y, willing to join the study with clinically detectable occlusal or proximal carious vital permanent molar teeth with closed apex and healthy periodontal supporting. The minimum extension of the carious cavity should be at least 1 mm in width to accommodate with the probe of the prepometer Exclusion Criteria: Excluded participants were those with poor oral hygiene, severe medical complications, showing signs and symptoms of irreversible or necrotic pulp pathology also when the affected tooth was with extended buccal or lingual caries, extending clinically beyond ¼ dentin thickness or previously restored.

Ages Eligible for Study
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Minimum Age: 12 Years
Maximum Age: 25 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Reference test: Radiographic examination<br> | Diagnostic Test: Reference test: Digital Radiographic examination<br>* A digital periapical radiograph using paralleling technique was taken<br>|
| Experimental: Index test: electrical impedance device, Prepometer<br> | Diagnostic Test: electrical impedance device,<br>* The electrical resistance of the residual dentine underneath each measurement point was determined between an electrode and the crown pulp (Prepometer, Hager & Werken, Duisburg, Germany). Assigning the electrical resistance of the dentin. high values are considered to represent more residual dentine than low values.<br>* Other names: Prepometer;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| validity of the two devices | Level of agreement between the digital radiograph and the device in measurement of remaining dentin thickness | Through study completion, an average of 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Patients satisfaction between two devices | By visual analogue scale Visual Analog Scale (VAS) which is a 100 mm straight horizontal line with the left end indicating •not at all satisfied- and the right end very satisfied. | Through study completion, an average of 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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electrical impedance device (prepometer), digital radiography, remaining dentin thickness