Evaluation of Gingival Health Parameters in Hybrid CAD / CAM Crowns Produced After Different Retraction Processes

NCT03816930 | Completed DMC

• 1 other identifier: 05
• Study Type: interventional
• Target: 52
• Locations: 1 country
• Sites: 1

Brief Summary

Clinically, the gingival retraction dentistry itself has found wide uses. It has achieved the use of subgingival and gingival crowns in fixed prostheses, cervical abrasion in restorative dentistry, management of root caries and root sensitivity, and recently in the use of appropriate measurements to improve the marginal fit of implant prostheses.There are three different retraction procedures described in the literature: mechanical, mechanical-chemical (chemically impregnated cords or matrix in injectable form) and surgery (electrosurgical, laser, cauterization, etc.)The mechanical method of retraction cords is not always suitable for patients' existing pocket depth, the necessity of using different combinations in shallow or deep pockets, the potential for limited bleeding control in chemically impregnated cords and the toxicity values in those who interact with chemical have led researchers to search for alternative methods. Especially inflammed gingiva is very sensitive to mechanical and chemical trauma. Studies have reported that gingival inflammation, pain, pocket formation, gingival withdrawal, increased bleeding and wound contamination occurred following retraction cord application. However, it is a known fact that the impression material is distorted or the accuracy of the measurement is decreased with the measurements taken without retraction. Nowadays, CAD / CAM (computer-aided design / computer-aided manufacturing) devices, which are designed to overcome these problems and eliminate the errors related to the measurement material, are the first step to be taken with a clear measure.Gingival retraction is recommended to improve the success of scanners in all restorations performed at the gingival or subgingival endpoint. Therefore, in our study, crown restorations will be produced from hybrid blocks by means of CAD / CAM device in order to evaluate the interaction of gingival health with hybrid blocks and to provide the latest technology and standardization.

Conditions

Periodontal Disease; Gingival Disease

Keywords

CAD/CAM; Gingival retraction

Outcome Measures

Primary Outcomes (1)

• Retraction methods or procedures effects on gingival health

  Probing depth is one of the criteria that shows the gingival health. In each control sessions same researcher measure the probing depth as mm via a periodontal probe.

  3-12 months

Study Arms (3)

Mechanical cord usage

ACTIVE COMPARATOR

Mechanical retraction

Procedure: mechanical cord usage

Chemical contained retraction usage

ACTIVE COMPARATOR

Chemical retraction

Procedure: mechanical cord usage

MZ-6 laser tip used throughing

ACTIVE COMPARATOR

Laser retraction

Procedure: mechanical cord usage

Interventions

mechanical cord usage PROCEDURE

Due to the retraction procedures, same preparation conditions will be obtained.

Also known as: Chemical contained retraction usage, MZ-6 laser tip used throughing

Chemical contained retraction usage; MZ-6 laser tip used throughing; Mechanical cord usage

Eligibility Criteria

• Age: 18 Years - 60 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Being systemically healthy
• To indicate crown restoration in mandibular molar teeth
• To be vital to the preparation of the crown of the teeth

You may not qualify if:

• Systemically unhealthy individuals
• Endodontic treatment of mandibular molar teeth
• Mandibular molar female individuals drawn for various reasons
• Pregnant women
• Periodontally unhealthy individuals

Sponsors & Collaborators

• Yuzuncu Yil University: lead

Study Sites (1)

Beyza Ünalan Değirmenci

Van, 65080, Turkey (Türkiye)

Location

Related Publications (8)

• Padbury A Jr, Eber R, Wang HL. Interactions between the gingiva and the margin of restorations. J Clin Periodontol. 2003 May;30(5):379-85. doi: 10.1034/j.1600-051x.2003.01277.x.

  PMID: 12716328 RESULT

• Al-Ani A, Bennani V, Chandler NP, Lyons KM, Thomson WM. New Zealand dentists' use of gingival retraction techniques for fixed prosthodontics and implants. N Z Dent J. 2010 Sep;106(3):92-6.

  PMID: 20882737 RESULT

• Goldberg PV, Higginbottom FL, Wilson TG. Periodontal considerations in restorative and implant therapy. Periodontol 2000. 2001;25:100-9. doi: 10.1034/j.1600-0757.2001.22250108.x.

  PMID: 11155185 RESULT

• Kopac I, Cvetko E, Marion L. Gingival inflammatory response induced by chemical retraction agents in beagle dogs. Int J Prosthodont. 2002 Jan-Feb;15(1):14-9.

  PMID: 11887594 RESULT

• Polat NT, Ozdemir AK, Turgut M. Effects of gingival retraction materials on gingival blood flow. Int J Prosthodont. 2007 Jan-Feb;20(1):57-62.

  PMID: 17319365 RESULT

• Ferrari M, Cagidiaco MC, Ercoli C. Tissue management with a new gingival retraction material: a preliminary clinical report. J Prosthet Dent. 1996 Mar;75(3):242-7. doi: 10.1016/s0022-3913(96)90479-5.

  PMID: 8648569 RESULT

• de Gennaro GG, Landesman HM, Calhoun JE, Martinoff JT. A comparison of gingival inflammation related to retraction cords. J Prosthet Dent. 1982 Apr;47(4):384-6. doi: 10.1016/s0022-3913(82)80085-1.

  PMID: 6951037 RESULT

• Ahmed SN, Donovan TE. Gingival displacement: Survey results of dentists' practice procedures. J Prosthet Dent. 2015 Jul;114(1):81-5.e1-2. doi: 10.1016/j.prosdent.2014.11.015. Epub 2015 Apr 24.

  PMID: 25917854 RESULT

MeSH Terms

Conditions

Periodontal Diseases; Gingival Diseases

Condition Hierarchy (Ancestors)

Mouth Diseases; Stomatognathic Diseases

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor

Study Record Dates

• First Submitted: January 17, 2019
• First Posted: January 25, 2019
• Study Start: January 17, 2019
• Primary Completion: January 17, 2020
• Study Completion: April 17, 2020
• Last Updated: April 22, 2021

Record last verified: 2021-04

Locations

TU (1)