Patients' Preferences for Repair Versus Replacement Restorations

Partially defective dental restorations might either be treated by complete replacement or by repair of the affected region. Repair restorations are a scientifically proven approach to manage failed restorations, but probably unknown to most patients. Results from this study and findings on the predictors of patients' therapy decisions might improve future patient information documents.

Study Overview

• Status: Unknown
• Conditions: Patient Preference
• Intervention / Treatment: Other: Questionnaire

Detailed Description

Handling insufficient restorations contributes up to 2/3 of all treatments in dentistry. Formerly, defective restorations were completely removed and replaced. Today, repair restorations are an alternative choice. During repair treatment, only the defective portion of a restoration (instead of the complete restoration) is removed and replaced. By performing repair restorations dental hard tissue can be conserved and the risk of treatment associated complications is reduced.

Recent studies have shown that survival rates of repair restorations are slightly lower compared to replacement fillings. Nevertheless, in certain clinical situations repair restorations are more cost-effective than replacement.

Further studies have shown that patients' decisions differ with regard to a variety of factors. This applies to decisions regarding dental treatments as well. However, patients' decisions between both possible therapy options (repair or replacement) of partially defective restorations are not yet investigated.

• Study Type: Observational
• Enrollment (Anticipated): 100

Contacts and Locations

Study Locations

• Germany
  • Lower Saxony
    • Göttingen, Lower Saxony, Germany, 37075
      • University Medical Center Göttingen, Dept. of Preventive Dentistry, Periodontology and Cariology

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Germany

Description

Participant are selected by consecutive patient sampling.

Inclusion Criteria:

• At least one partially defective dental restoration which can either be repaired or replaced

Exclusion Criteria:

• Non-fulfillment of the inclusion criteria
• Lack of capacity to consent
• No German language skills in written and spoken language
• Age <18 years
• Defective restoration must be completely replaced in any event or is not suitable for repair

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Oral patient information only; Patients are given oral information only (information as usual). After patients have made their decisions (repair or replacement), a questionnaire survey is conducted.	Other: Questionnaire; Patients are given a questionnaire with items related to personality and behaviour.
Written patient education before oral patient information; Patients are given a flow chart in advance of oral information. After patients have made their decisions (repair or replacement), a questionnaire survey is conducted.	Other: Questionnaire; Patients are given a questionnaire with items related to personality and behaviour.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Completion of a questionnaire	15 minutes

Collaborators and Investigators

• Sponsor: University of Göttingen
• Collaborators: Charite University, Berlin, Germany; Georg-Elias-Mueller-Institute of Psychology, University Goettingen

Publications and helpful links

General Publications

• Schwendicke F, Mostajaboldave R, Otto I, Dorfer CE, Burkert S. Patients' preferences for selective versus complete excavation: A mixed-methods study. J Dent. 2016 Mar;46:47-53. doi: 10.1016/j.jdent.2016.01.006. Epub 2016 Jan 18.
• Weeks L, Balneaves LG, Paterson C, Verhoef M. Decision-making about complementary and alternative medicine by cancer patients: integrative literature review. Open Med. 2014 Apr 15;8(2):e54-66. eCollection 2014.
• Ernst J, Brahler E, Weissflog G. [Patient involvement in medical decision making--an overview on patient preferences and impacting factors]. Gesundheitswesen. 2014 Apr;76(4):187-92. doi: 10.1055/s-0033-1361150. Epub 2014 Jan 9. German.
• Kanzow P, Hoffmann R, Tschammler C, Kruppa J, Rodig T, Wiegand A. Attitudes, practice, and experience of German dentists regarding repair restorations. Clin Oral Investig. 2017 May;21(4):1087-1093. doi: 10.1007/s00784-016-1859-3. Epub 2016 Jun 2.
• Kanzow P, Wiegand A, Schwendicke F. Cost-effectiveness of repairing versus replacing composite or amalgam restorations. J Dent. 2016 Nov;54:41-47. doi: 10.1016/j.jdent.2016.08.008. Epub 2016 Aug 26.

Study record dates

Study Major Dates

• Study Start (ACTUAL): March 15, 2017
• Primary Completion (ANTICIPATED): January 1, 2021
• Study Completion (ANTICIPATED): June 1, 2021

Study Registration Dates

• First Submitted: November 23, 2016
• First Submitted That Met QC Criteria: November 23, 2016
• First Posted (ESTIMATE): November 29, 2016

Study Record Updates

• Last Update Posted (ACTUAL): November 5, 2020
• Last Update Submitted That Met QC Criteria: November 4, 2020
• Last Verified: November 1, 2020

More Information

Terms related to this study

• Keywords: Patients' Preferences
• Other Study ID Numbers: Repair-Patients

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No