Hall Technique vs. stainless-steel crowns for children’s decayed back teeth
Official title: A Randomized Controlled Trial Comparing the Hall Technique and Conventional Stainless-Steel Crowns in Carious Primary Molars : Clinical Outcomes, Anxiety, Time, and Cost-Effectiveness
Run by MTI University · NCT07648654 · Data updated 2026-11-12
This study tests whether the Hall technique can be as effective as traditional stainless-steel crowns for treating carious primary molars in children aged 5–8.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 5 Years to 8 Years |
| Sex | All |
| Enrollment | 200 (estimated) |
| Sponsor | MTI University Academic / other |
| Locations | 1 site (Cairo) |
| Status | Recruiting |
| Started | May 25, 2026 |
| Main results expected | May 25, 2026 |
| Study ends | August 25, 2026 |
| Registry record updated | June 15, 2026 |
| Trial ID | NCT07648654 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Children aged 5–8 with one or two asymptomatic, vital posterior primary molars with multi-surface caries but no pulp involvement, and with cooperation suitable for dental procedures.
✕Probably not a fit
Children with non-vital teeth, pulp pathology, or other complicating dental conditions may not benefit from these crown approaches.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This randomized controlled trial compares the Hall Technique to conventional stainless-steel crowns for treating carious primary molars in children. It uses an equivalency design to see if both approaches have similar clinical and radiographic success, while also examining child anxiety, treatment duration, and cost-effectiveness. Participants are 5–8 years old with one or two asymptomatic, vital posterior primary molars showing caries but no pulp involvement. Procedures follow CONSORT guidelines and occur at MTI University’s Pediatric Dentistry clinic in Cairo, with informed consent and child assent obtained. Outcomes include treatment success, patient anxiety, procedure time, and overall costs to care providers and families.
Why it matters
Potential benefit: If Hall Technique proves equivalent or superior, it could reduce treatment time and anxiety while maintaining good results for children.
How similar studies have gone: Previous work suggests both Hall Technique and stainless-steel crowns can be effective; this study tests equivalency in a randomized framework.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Only patients aged between 5-8 years old will be included in the study. The following criteria is used to determine eligibility to be part of the study: Only participants with one or two asymptomatic, vital primary molars following completion of treatment, will be able to participate in the clinical study .The posterior teeth may have multi-surface caries within the proximal and occlusal surfaces of the teeth, either one or both surfaces have been involved with caries and results in complete coronal coverage of the tooth. The posterior teeth included must show evidence of caries on x-rays (ICDAS 0-3), but with no evidence of pulp involvement/radicular pathology. All included teeth must be able to be restored and possess sufficient structure for retention of a preformed metal crown (PMC). Participants will be eligible if they demonstrate cooperation (i.e. Frankl behaviour rating 3-4) during examination/anesthesia/surgery. Exclusion Criteria: * o Any clinical symptoms or signs associated with pulpal pathology which could include sinus tract, spontaneous pain, tenderness to percussion or pathological mobility. * Radiographic evidence of pulp involvement, furcation radiolucency or pathological root resorption exceeding one-third (1/3) of the root length were also considered. * There are certain medical or systemic conditions/contra-indicators for routine dental treatment. * Target teeth which have been previously restored have additional requirements. * A follow-up appointment cannot occur because the parent/guardian will not be able to bring the child in for any follow-up appointments is another issue.
Where it's running
-
Pedodontics clinic - Faculty of Dentistry _ MTI University
Cairo, Egypt Recruiting
Study contacts
- Study coordinator: Esraa Aly
- Email: esraahamed84@live.com
- Phone: +201006788341
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.