Bite effects of Hall crowns on baby molars
Comparative Evaluation of Occlusal Changes Following Hall Technique Crowns in Different Primary Molar Groups: A Randomized Controlled Clinical Trial
This trial tests whether placing Hall crowns on different primary molars changes a child's bite, using digital intraoral scans to measure differences.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 60 (estimated) |
| Ages | 7 Years to 10 Years |
| Sex | All |
| Sponsor | Ankara Yildirim Beyazıt University Academic / other |
| Locations | 1 site (Ankara, Keçiören) |
| Trial ID | NCT07134114 on ClinicalTrials.gov |
What this trial studies
The study will recruit 60 healthy children aged 7–10 with at least two carious primary molars and good cooperative behavior. One eligible primary molar per child will be randomly selected and patients stratified into four groups by tooth type and jaw (maxillary/mandibular first or second primary molars). Baseline digital intraoral scans will be taken after completion of other dental treatments, then a Hall crown will be placed and occlusal changes will be tracked using digital model analysis. The trial compares the degree and pattern of occlusal adaptation between molar groups to see if tooth position influences bite changes.
Who should consider this trial
Good fit: Children aged 7–10 in mixed dentition with at least two carious primary molars eligible for the Hall Technique, ASA I–II status, and cooperative behavior (Frankl 3–4) are ideal candidates.
Not a fit: Children with skeletal or dental anomalies, uncontrolled dental pain, missing antagonist teeth, or those outside the specified age/behavior criteria are unlikely to benefit from participation.
Why it matters
Potential benefit: If successful, findings could help dentists predict and manage bite changes after Hall crown placement, improving comfort and treatment planning for children.
How similar studies have performed: The Hall Technique is an established, well-tolerated method for managing carious primary molars, but detailed digital comparisons of occlusal adaptation by specific molar groups are relatively limited.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: Inclusion Criteria for Participants * No skeletal or dental anomalies, * ASA (American Society of Anesthesiologists) physical status classification of I or II , * Frankl Behavior Rating Scale score of 3 or 4, * In the mixed dentition stage, * Fully erupted permanent first molars in occlusal contact at maximum intercuspation * No acute dental pain or need for emergency treatment, * Presence of at least two primary molars with carious lesions scored as 3, 4, or 5 according to the ICDAS (International Caries Detection and Assessment System), * Presence of an antagonist tooth for the molar planned to receive Hall Technique, * Provision of verbal and written informed consent by the participant and legal guardian after reading or listening to the consent form and fully understanding its content. Inclusion Criteria for Tooth Based on Clinical Examination: * No history of prolonged pain in response to thermal or chemical stimuli, or spontaneous pain suggestive of irreversible pulpitis, * No sensitivity to percussion or palpation, * Absence of both pathological and physiological mobility, * No signs of swelling, fistula, or discoloration, * Sufficient remaining tooth structure to retain a preformed stainless steel crown. Based on Radiographic Examination: * Radiolucent lesion associated with dental caries located within the outer one-third to two-thirds of the dentin, with a visible band of normal dentin between the lesion and the pulp, * At least two-thirds of root length present, * No signs of internal or external pathological or physiological root resorption, * Intact lamina dura and normal periodontal ligament space, * No periradicular bone loss surrounding the roots, * No calcified masses in the pulp chamber. Exclusion Criteria: * Individuals with serious systemic or psychological conditions * Participants who fail to attend follow-up appointments * Those who exhibit excessive fear or anxiety reactions and are unable to cooperate during treatment
Where this trial is running
Ankara, Keçiören
- Ankara Yıldırım Beyazıt University Faculty of Dentistry — Ankara, Keçiören, Turkey (Türkiye) (Recruiting)
Study contacts
- Study coordinator: Ayşe I. Cihan, Professor
- Email: isilcihan@yahoo.com
- Phone: +905325095961
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.