Evaluation of Clinical Wear and Surface Roughness of Partial Restorations Produced by Additive and Subtractive Manufacturing Methods: A Split-Mouth Randomized Controlled Clinical Trial
NCT ID: NCT07057401
Last Updated: 2025-07-09
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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NOT_YET_RECRUITING
NA
30 participants
INTERVENTIONAL
2025-09-20
2027-06-20
Brief Summary
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In recent years, crown restorations produced with CAD-CAM systems have been safely used in dentistry. These types of restorative materials are expected not to undergo significant wear themselves and also not to cause wear on natural teeth. Therefore, the structural resistance and hardness of the material are clinically very important. Restorations produced using 3D printing are among the latest technological developments in dentistry.
Additive manufacturing has been defined by the American Society for Testing and Materials (ASTM) as "the process of joining materials layer upon layer to make objects from 3D model data, as opposed to subtractive manufacturing methodologies."
3D printers have started to be used in various disciplines of dentistry such as dental education, oral surgery, dental implantology, orthodontics, pedodontics, prosthodontics, and restorative dentistry. In restorative clinics, they can especially be used in intracoronal restorations. However, studies in this area are quite limited.
The objective of this study is to evaluate the wear values using a Geomagic 3X device and the surface roughness values using a profilometer device over a 12-month period on single crown restorations applied to permanent first molars fabricated by CAD-CAM and 3D printing techniques.
A total of 26 single crown restorations will be performed on first molars. Participants will be selected among individuals aged 18-50 who apply to the Department of Restorative Dentistry, Faculty of Dentistry, Çukurova University. Eligible individuals must be systemically healthy, have no periodontal attachment loss, have an indication for crown restoration, and have a natural opposing tooth in contact with the restored tooth.
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Detailed Description
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Although restorations produced by traditional methods are of high quality, they are mechanically and aesthetically affected due to being shaped manually by the dentist (conventional method). Therefore, errors that may occur during fabrication can negatively affect the durability and marginal adaptation of composite restorations.
In a study comparing production techniques, composite crowns produced by the direct technique and single crown restorations fabricated using CAD-CAM were examined under an electron microscope. The composite restorations manufactured with the indirect technique showed more porosity, while no porosity was observed in restorations produced with the CAD-CAM method.
This result may be attributed to the fact that the prefabricated CAD-CAM blocks are homogeneous and subjected to quality control during production. As a result, internal structural defects are generally not observed in milled products. The absence of porosity is an important factor in the durability and fit of restorations.
3D Printers Restorations produced using 3D printers are among the latest technological advancements in dentistry. Additive manufacturing has been defined by the American Society for Testing and Materials (ASTM) as "the process of joining materials layer upon layer to create objects from 3D model data, as opposed to subtractive manufacturing methodologies." 3D printers have begun to be used in various dental disciplines such as dental education, oral surgery, dental implantology, orthodontics, pedodontics, prosthodontics, and restorative dentistry. In restorative clinics, they can especially be utilized for intracoronal restorations. However, studies in this area remain quite limited.
Null hypothesis of this study is that there is no statistically significant difference in clinical wear and surface roughness between single crown indirect restorations fabricated using additive and subtractive manufacturing methods.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Participants will be systemically healthy individuals aged 18 to 50 years, with no periodontal support loss, indicated for crown restoration, and having natural antagonist teeth, who apply to the Department of Restorative Dentistry Clinic at Çukurova University Faculty of Dentistry.
A total of 15 single crown restorations will be performed on first molar teeth.
Study Groups
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CAD-CAM Group
Participants will receive single crown restorations manufactured by subtractive manufacturing (CAD-CAM milling) techniques.
CAD-CAM Manufactured Crowns
Single crowns produced using computer-aided design and milling technology applied to permanent molars.
3D Printing Group
Participants will receive single crown restorations manufactured by additive manufacturing (3D printing) techniques.
3D Printed Crowns
Single crowns produced using 3D printing technology applied to permanent molars.
Interventions
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CAD-CAM Manufactured Crowns
Single crowns produced using computer-aided design and milling technology applied to permanent molars.
3D Printed Crowns
Single crowns produced using 3D printing technology applied to permanent molars.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* Symptomatic Vital Teeth
15 Years
70 Years
ALL
No
Sponsors
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Husna Selinay
OTHER
Responsible Party
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Husna Selinay
Research Assistant Dentist
Principal Investigators
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ezgi sonkaya akburak, doctor lecturer
Role: STUDY_DIRECTOR
Cukurova University Restorative Dentistry
Locations
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Çukurova Üniversitesi
Adana, sarıçam, Turkey (Türkiye)
Countries
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Central Contacts
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HÜSNA SELİNAY S dağdelen, Research Assistant
Role: CONTACT
Related Links
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Related Info
Other Identifiers
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Department of Restorative Dent
Identifier Type: -
Identifier Source: org_study_id
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