Marginal Fit of Porcelain Veneers After Finishing Prepared Surfaces With Ultrasonic Tips

NCT ID: NCT02683499

Last Updated: 2016-03-15

Study Results

Results pending

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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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

27 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-04-30

Study Completion Date

2016-03-31

Brief Summary

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The aim of the study is to assess the marginal fit following preparation finishing with ultrasonic tips of porcelain veneers compared to the ordinary preparation using burs only. Two-hundred and forty crowns prepared to receive porcelain veneers (in a split-mouth design). On one side of the mouth, the prepared surfaces will be finished with ultrasonic tips. Marginal fit is measured by a 'cement replica technique'.

Detailed Description

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All-ceramic restoration are increasing in daily routine treatments although remain less popular than metal-ceramic crowns especially as the cost of metal rises and aesthetic requested people increases The increased demand for aesthetic treatments has led to the widespread use of metal-free ceramics for conservative restorations. Whilst studies for clinical porcelain restorations clarifies satisfactory success rates describes the reasons for failure is due to advance the techniques and materials used in dental restorations. All-ceramic restorations failures are due to several reasons, such as restoration fractures, discoloration in marginal area, marginal misfits and secondary decays. However, secondary caries is the main failure mentioned by the studies, responsible for 21% of the suddenly crown replacements. The etiology of secondary caries is as classified to primary caries, with the involvement of the same cariogenic microorganisms. The place and spread where to invade of primary and secondary lesions are also similar, with secondary caries developing mainly in the gingival tooth interface of restored teeth. Different authors have mentioned different instrumentation to prepare teeth appropriately.Preparation may be applied using diamond burs attached to sonic devices or high-speed rotating instruments with diamond or tungsten carbide burs. The action of conventional high-speed instruments applied for tooth preparation has been widely researched as well as the adhesion strengths and marginal microleakage it produces. Some authors insisted that dental surface morphology of prepared teeth is influenced by the type of bur used for preparation.

Conditions

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Tooth Discoloration

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Outcome Assessors

Study Groups

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Ultrasonic tips

Prepared surfaces will be finished with ultrasonic tips

Group Type EXPERIMENTAL

Ultrasonic tips

Intervention Type PROCEDURE

These tips are going to be used to give the final shape of the prepared surfaces before taking the impression for the construction of the veneers.

Conventional

Prepared surfaces will be finished with ordinary burs

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Ultrasonic tips

These tips are going to be used to give the final shape of the prepared surfaces before taking the impression for the construction of the veneers.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* aesthetic requirement with no cracks and congenital loss of any incisors.
* discolored teeth not responding to bleaching.

Exclusion Criteria

* evidence proximal caries ,
* edge to edge occlusion
* parafunctional habits
* root canal treated teeth.
Minimum Eligible Age

20 Years

Maximum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Damascus University

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Anas Abdo, DDS

Role: PRINCIPAL_INVESTIGATOR

MSc student in Prosthodontics, University of Damascus Dental School

Mirza Allaf, DDS MSc PhD

Role: STUDY_DIRECTOR

Associate Professor of Prosthodontics

Locations

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Department of Fixed Prosthodontics, University of Damsacus

Damascus, Rif-dimashq Governorate, Syria

Site Status

Countries

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Syria

References

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Ayad MF. Effects of tooth preparation burs and luting cement types on the marginal fit of extracoronal restorations. J Prosthodont. 2009 Feb;18(2):145-51. doi: 10.1111/j.1532-849X.2008.00398.x. Epub 2008 Nov 18.

Reference Type BACKGROUND
PMID: 19054303 (View on PubMed)

Ayad MF, Johnston WM, Rosenstiel SF. Influence of dental rotary instruments on the roughness and wettability of human dentin surfaces. J Prosthet Dent. 2009 Aug;102(2):81-8. doi: 10.1016/S0022-3913(09)60114-1.

Reference Type BACKGROUND
PMID: 19643221 (View on PubMed)

Christensen RP, Ploeger BJ. A clinical comparison of zirconia, metal and alumina fixed-prosthesis frameworks veneered with layered or pressed ceramic: a three-year report. J Am Dent Assoc. 2010 Nov;141(11):1317-29. doi: 10.14219/jada.archive.2010.0076.

Reference Type BACKGROUND
PMID: 21037189 (View on PubMed)

Eick JD, Johnson LN, Fromer JR, Good RJ, Neumann AW. Surface topography: its influence on wetting and adhesion in a dental adhesive system. J Dent Res. 1972 May-Jun;51(3):780-8. doi: 10.1177/00220345720510031401. No abstract available.

Reference Type BACKGROUND
PMID: 4555792 (View on PubMed)

Finger WJ, Manabe A, Alker B. Dentin surface roughness vs. bond strength of dentin adhesives. Dent Mater. 1989 Sep;5(5):319-23. doi: 10.1016/0109-5641(89)90123-1.

Reference Type BACKGROUND
PMID: 2700463 (View on PubMed)

Hickel R, Roulet JF, Bayne S, Heintze SD, Mjor IA, Peters M, Rousson V, Randall R, Schmalz G, Tyas M, Vanherle G. Recommendations for conducting controlled clinical studies of dental restorative materials. Clin Oral Investig. 2007 Mar;11(1):5-33. doi: 10.1007/s00784-006-0095-7. Epub 2007 Jan 30.

Reference Type BACKGROUND
PMID: 17262225 (View on PubMed)

Lange RT, Pfeiffer P. Clinical evaluation of ceramic inlays compared to composite restorations. Oper Dent. 2009 May-Jun;34(3):263-72. doi: 10.2341/08-95.

Reference Type BACKGROUND
PMID: 19544814 (View on PubMed)

Mowery AS Jr, Parker M, Davis EL. Dentin bonding: the effect of surface roughness on shear bond strength. Oper Dent. 1987 Summer;12(3):91-4. No abstract available.

Reference Type BACKGROUND
PMID: 3306618 (View on PubMed)

Price RB, Sutow EJ. Micrographic and profilometric evaluation of the finish produced by diamond and tungsten carbide finishing burs on enamel and dentin. J Prosthet Dent. 1988 Sep;60(3):311-6. doi: 10.1016/0022-3913(88)90275-2. No abstract available.

Reference Type BACKGROUND
PMID: 2845071 (View on PubMed)

Other Identifiers

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UDDS-FixPro-01-2016

Identifier Type: -

Identifier Source: org_study_id

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