Clinical trial NCT03256409: Bar and Ball Joint Overdentures Surface Roughness and Microbial Adherence
Official title: Bar and Ball Joint Overdentures Surface Roughness and Microbial Adherence
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Adhesiveness
Keywords: biomaterials
methacrylates
microbiology
implant dentistry/implantology
removable prosthodontics
clinical studies/trials
Lead sponsor: Gastrovital
Sponsor class: OTHER
First posted: 2017-08-22
Enrollment: 10
Sex: ALL
Minimum age (years): 50
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: The study presents the results of a sample of ten patients randomly assigned to receive implant-retained overdentures and divided into two parallel groups of five participants in a single-blind trial at a follow-up period of 30 - 180 days permanence in the mouth. Five overdentures were made for each group: Group 1: BOD: five systems titanium bar CARES® and synOcta® Straumann® Dental Implant System, Holding AG Inc., Basel, Switzerland (BOD). Group 2: BJOD: five systems ball joint Klockner® Implant System; Soadco Inc., Escaldes-Engordany, Andorra were used in two parallel groups of five participants, in an essay to simple blind person.
Primary purpose: TREATMENT

Brief summary: The aim of the study was to compare the surface roughness (Ra) of the implant retained mandibular bar overdenture (BOD) and the implant retained mandibular ball joint overdenture (BJOD) in jaw and its relation with the adhesion of molds and yeasts and mesophyll aerobe, in time 30 to 180 days in mouth. Five systems titanium bar CARES® and synOcta® Straumann® Dental Implant System, Holding AG Inc., Basel, Switzerland (BOD); and five systems joint ball Klockner® Implant System; Soadco Inc., Escaldes-Engordany; Andorra (BJOD), were used in two parallel groups of five participants, in an essay to simple blind person. To 30 to 180 days they were withdrawn and they were evaluated the Ra (Mitutoyo Surfest SJ-301® Mitutoyo Corporation Inc., Kanagawa, Japan) and the adhesion of microorganisms (CFU/ml).

The Ra:um (the 30th and 180th): BOD, 0.965 - 1.351; BJOD, 1.325 - 2.384. Adhesion: molds and yeasts, BOD, 2.6 x 102 and 4.6 x 103; BJOD, 3.0 x 102 and 5.3 x 104. Adhesion: mesophyll aerobe, BOD, 3.8 x 106 and 5.8 x 106; BJOD, 4.3 x 106 and 7.1 x 107. The BOD and BJOD, present different Ra (P \< 0.05) to 30 to 180 days. To 30 days (P = 0.489) differences do not exist as regards the adhesion of molds and yeasts and mesophyll aerobe between both overdentures. To 180 days (P = 0.723) differences exist as regards the adhesion of mold and yeast and mesophyll aerobe, being major in BJOD.

Detailed description: Adherence mold and yeast and mesophyll aerobe to BOD and BJOD, Surface roughness (Ra), and Statistical Analyses Microbial populations have been controlled in the saliva at initial time and adherence at 30 to 180 days after the overdentures in the mouth. The saliva sample was obtained from the patient in a sterile sputum collection bottle through a sterile solution. The overdenture samples were extracted and processed for analysis. Each sample was submerged in ¼ sterile Ringer and subjected to vigorous ultrasound shaking. From each of the microbial suspensions, successive dilutions were made to determine the total number of viable microorganisms present. Total count of mold and yeast and total count of mesophyll aerobe were performed.

The surface roughness of BOD and BJOD was determined with the rugosimeter the Mitutoyo Surfest SJ-301® (Mitutoyo Corporation Inc., Kanagawa, Japan), through a displacement force of 4mN and of the tray to 0.5 mm/s and back to 1 mm/s (Murtra and Arcís,1999). The roughness profile Ra was evaluated and determined in microns (ųm) through five readings for each of the samples in the study respectively.

The results of BOD and BJOD were compared for the determination of Ra and the adherence of mold and yeast and mesophyll aerobe. For this, we used the statistics Shapiro-Wilk, T and the Pearson Correlation Coefficient to determinate the relationship between the study variables.

Eligibility criteria: Inclusion Criteria:

* Total edentulous mandible from 50 to 60 years of age
* Absence of systemic conditions.

Exclusion Criteria:

* Hyperplasia and history of periodontal disease
* Patients with local and/or systemic antimicrobial treatment within 72 hours prior to evaluation during the study
* Signs of severe oral parafunction

Primary outcomes:
measure: Average values of surface roughness (Ra) and correlation of independent test in implant-retained mandibular bar overdentures (BOD) 30 - 180 days.
timeFrame: Change from 30 to 180 days
measure: Average values of surface roughness (Ra) and correlation of independents tests in implant-retained ball joint overdentures (BJOD) 30 - 180 days.
timeFrame: Change from 30 to 180 days
Secondary outcomes:
measure: Average values of mold and yeast adhesion and correlation of independents tests in implant-retained mandibular bar overdentures (BOD) and implant-retained mandibular ball joint overdentures (BJOD) 30 - 180 days
timeFrame: Change from 30 to 180 days
measure: Average values of mesophyll aerobe adhesion and correlation of independents tests in implant-retained mandibular bar overdentures (BOD) and implant-retained mandibular ball joint overdentures (BJOD) 30 - 180 days
timeFrame: Change from 30 to 180 days
Other outcomes:
Locations:
Study officials:
affiliation: CONCYTEC
name: Rocío Violeta Valenzuela-Narváez, PhD DDS
role: PRINCIPAL_INVESTIGATOR
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