CompletedNot Applicable

Radicular Dentin Remaining, Risk of Perforation and Canal Transportation in Manual Versus Rotary Instrumentation in Primary Molars

Egypt20 participantsStarted 2020-12-01

Plain-language summary

Background: Root canal preparation techniques using manual instruments have found to be time-consuming and may lead to iatrogenic errors such as ledging, zipping, canal transportation, and apical blockage. To overcome this, much attention has been directed toward root canal preparation using nickel-titanium (NiTi)-rotary instruments. The flexibility and the instrument design of NiTi-rotary files allow it to closely follow the original root canal path. Aim: This in vitro study aims to compare the amount of dentin removal in primary molars instrumented with hand versus rotary files and the root canal transportation and risk of perforation using cone beam computed tomography (CBCT). Materials and Method: ( 20 ) extracted discarded mandibular second primary molars were selected to contribute in the study, having minimal apical resorption with presence of at least two-third remaining root structure with absence of visual perforating resorption. The teeth included in the study were stored in water or saline till the experimental time. The extracted primary molars were divided into two groups of the study: Group I was prepared with rotary instrumentation using ProTaper Next (Dentsply, Switzerland) and Group II was prepared by manual instrumentation using K type files. All the root canals (n=40) were prepared up to size 35 using the step-back technique. The teeth were subjected to CBCT scans for the evaluation of thickness of radicular dentin remaining, risk of perforation and canal transportation before and after instrumentation in the two groups at three different locations (2, 4 and 7 mm from the apex) . Dentin removal was calculated by superimposing images using the InVivo 5.1 software. Data were statistically analyzed using independent samples t test.

Who can participate

Age range

3 Years – 7 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Extracted Second primary molars. Extracted second primary molars with at least 2/3 of root remaining or with minimal apical resorption. Extracted second primary molars without visual perforation resorption. Exclusion Criteria: * Exfoliated second primary molars. If pre assessment radiograph for extracted second primary molars reveals internal or external root resorption. Extracted second primary molars with extreme root curvature.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Radicular dentin remaining

Timeframe: 3 months

Transportation of Root Canal

Timeframe: 3 months

Trial details

NCT IDNCT04793308

SponsorCairo University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2021-03-01

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