Maxillary 3-implant Removable Prostheses Without Palatal Coverage on Locator Abutments - a Prospective Cohort Study
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Tromso
- Enrollment
- 32
- Locations
- 1
- Primary Endpoint
- Intra-oral status
Study Overview
Brief Summary
The aims of this clinical study conducted at a dental specialty clinic in Drammen, Norway are to assess the clinical outcomes of patients with an edentate upper jaw having been treated with a removable full prosthesis supported by 3 implants to restore function and aesthetics. Clinical variables beyond implant dimensions and intraoral location, such as recall routines, maintenance needs, patient satisfaction and quality of life, will also be appraised and contrasted with an aim to elucidate their association with clinical outcomes. Specific evaluation will be done with regard to the following outcome criteria:
- crestal bone levels and periodontal conditions around implants
- incidence rates of biological, technical, traumatic failures / complications related to implants
- incidence rates of biological, technical, mechanical, esthetic failures/complications with prosthesis and prosthetic components A secondary objective is to identify the different risk factors for biological failures / complications, including the influence of medical conditions and tobacco use.
Detailed Description
Materials and Methods The protocol is submitted to the Research Ethics Board of the Northern Norway in order to obtain ethics approval prior to commencing the study. All patients will obtain an invitation letter detailing the objectives of the study and requested to sign a consent letter prior to clinical examinations according to principles for good research practice. All patients will be offered a free implant hygiene session and prosthesis cleaning.
Study population All patients treated in a private dental clinic in Drammen, Norway having received a maxillary removable full prosthesis supported on 3 dental implants will be invited to attend evaluations of their intra-oral status annually after implant installation and solicited about treatment satisfaction and daily oral functions. These patients were initially not offered maintenance care at the completion of their treatment.
The implants that have been used are made from titanium with a microrough surface (Astra Tech Implant System, Dentsply Implants, Mølndal, Sweden). All implants have been placed according to the manufacturer's instructions (http://www.dentsplyimplants.no/nb-NO/Implantatsystem/Prosedyrer/Treatment-planning) and fitted with precision attachments (Locator, ZEST Anchors, Escondido, CA, USA. The removable prostheses were made from heat cured poly-methyl-metacrylate (PMMA) incorporating three active matrices).
Recall Procedure Each patient will be invited by letter followed up by a phone call to attend an examination visit. The patients will complete a questionnaire related to changes in general health aspects, their experiences and satisfaction with the reconstructions and eventual need for repair sessions during the last year. Specifically, the medical history and the smoking history (e.g. pack/years) will be assessed. Recordings will be made of general and local factors which may affect the prognosis of the implants and prosthesis. This includes the occurrence of systemic disease since implant placement, regular medication used by patients, smoking status, dental treatment received since implant placement, recall frequency at the dental hygienist and the last dental examination appointment.
Collection of Data from Patients' Charts
Study Design
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Prospective
Eligibility Criteria
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Edentulous maxilla Competence to sign the informed consent form describing the study
Exclusion Criteria
- •Lack of jaw bone for the placement of dental implants without the need for bone regeneration.
Outcomes
Primary Outcomes
Intra-oral status
Time Frame: 3 years
The radiographic examination will comprise periapical radiographs or an orthopantomogram. The clinical examination include a basic periodontal examination with the use of an UNC-15 (University of North Carolina) manual periodontal probe. Outcomes measured will be presence or absence of peri-implant suppuration or fistula, the modified plaque and sulcus bleeding indices) and the probing depths.
Condition of prosthesis and implants
Time Frame: 3 years
The removable prosthesis will be examined for any technical flaws. Adverse technical events include loss of retention, or fracture and/or chipping of the removable prosthesis. Adverse mechanical events include loosening of the male attachment or fracture of an implant. The stability of all implants will be assessed, and any sign of mobility along with pain and discomfort will be interpreted as a definitive sign of implant failure.
Secondary Outcomes
- Patient-reported satisfaction outcome(5 years)
- Patient-reported quality of life outcome(5 years)
- Implant bone level changes(3 years)