Performance Of Class I Composite Restorations After Cavity Finishing By Air Abrasion Versus Diamond Stone

Cairo University (CU)

Status: Not yet enrolling

Conditions: Class I Dental Caries; Abrasion, Dental

Treatments: Other: Diamond Stone.; Other: Bioactive Glass Air Abrasion Particles.

Study type: Interventional

Funder types: Other

Identifiers

NCT06107218

Air Abrasion in Finishing

Details and patient eligibility

About

The aim of the study is to reveal the performance of the resin composite restorations after finishing the cavity walls and margins using bioactive glass air abrasion particles in comparison to the routine finishing with the finishing diamond stone according to the FDI criteria for post operative sensitivity, marginal adaptation, marginal discoloration, secondary caries, and retention.

Full description

Intraoral air abrasion is the process of altering the surface of the tooth structure through the use of abrasive particles propelled by compressed air or other gasses. The use of intraoral air abrasion has become practical with devices that simultaneously output abrasive particles and water to control the spread of the particles. There are different types of abrasive particles maybe used depending on the clinical application for which the intraoral air abrasion is being performed. Intraoral air abrasion may also be used as a tool for dental prophylaxis, often called air polishing.

Different particles could be incorporated into air abrasion devices according to the intended use of them, such as aluminum oxide (alumina), Calcium Sodium Phosphosilicate (Biactive Glass) and Sodium bicarbonate. To obtain maximum cutting efficiency, the particle should be hard enough to indent the substrate it abrades, and irregular in shape with a sharp cutting edge. Round and smooth particles possess poor abrasive properties, so it may be used for polishing needs "air- polishing". Increased air pressure provided an increased number and velocity of the particles. Abrading power must be proportional to kinetic energy of the particles, which is the function of mass and velocity of the particle. The cutting efficiency of air abrasion depends on several criteria, such as: size, shape, hardness, density of the particles and air pressure.

Aluminum oxide (alumina) are the most abrasive type of particles used. They are irregular in shape with different particle sizes. Intraoral sandblasting with alumina particles (Al2O3) was first described in 1945 by Black. Initially, it was reported that the bond strength to the tooth surface improved, also confirmed by recent investigations, and some authors adopted its use in clinical procedures even after preparing the cavity with rotating instrument. A bioactive glass abrasive, is also commercially available but indicated for the purpose of tooth polishing. Some work has also showed potential for it to have selective cutting properties. However, its cutting time can take 2-3 times longer than alumina, making it clinically indicated for cavity finishing and not cutting.

Enrollment: 78 estimated patients

Sex: All

Ages: 25 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Good oral hygiene (plaque index score 0 or 1).
• Absence of abnormal occlusion habits (e.g. bruxism, nail biting, tooth clenching and mouth breathing).
• Patients approving to participate in the study.

Exclusion criteria

• Patients with known allergic or adverse reaction to the tested materials.
• Systematic disease that may affect participation.
• Xerostomic patients.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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78 participants in 2 patient groups

Diamond Stone group (Comparator)

Active Comparator group

Description:

Class I cavities will be finished using 20-30 μm grit extra fine (EF) yellow coded diamond stone with maximum rotational speed 300,000 min -1.

Treatment:

Other: Diamond Stone.

Bioactive Glass Air Abrasion group (Intervention)

Active Comparator group

Description:

Class I cavities will be finished by AquaCare Air Abrasion Device using bioactive glass air-abrasion particles (a mix of 30-60-90 μm particles). The nozzle of the air abrasion device will be 0.6 in diameter and angulated at 90° to the occlusal surface with a distance away from the tooth about 2-3 mm. The device will be used in a dynamic motion with 60 psi (4 Bar) adjusted pressure for 3 seconds.

Treatment:

Other: Bioactive Glass Air Abrasion Particles.