New "in Vitro" Diagnostic Test for Oral Malodour (Striptest)
New "in Vitro" Diagnostic Test for Oral Malodour: First Prototype Evaluation
This study will assess the ability of a first prototype (strip) of a new chair side test to detect oral malodour. The strip is based on a new enzymatic reaction able to detect amines in saliva. Previous studies already showed significant correlations between oral malodor and the levels of amines in saliva. The limitation in their use as markers of oral malodour is the fact that the detection is usually carried out by complex techniques (High Performance Liquid Chromatography(HPLC)and Solid-Phase Micro Extraction-Gas Chromatography/Mass Spectrometry (SPME-GC/MS)). The results of the new enzymatic reaction can be evaluated by means of a colorimetric scale without necessity of extra apparatus.
The study will be carried out with volunteers recruited at a multidisciplinary consultation for bad breath, organized at the University Hospital Leuven, Belgium.
The paper strip will be used before the routine evaluation (organoleptic score (OS), the gold standard method for the diagnosis of halitosis and the level of volatile sulphur compounds (VSC), the most used adjunct tool to diagnose halitosis).
The results of the new chair side test (strip) will be correlated with the OS and VSC measurements (OralChroma™, Halimeter®). The sensitivity, specificity and positive and negative predicted values of the new chair side test will be calculated. The cut-off values for a yes/no test will be determined. The meaning of color scores will be analyzed to assign a meaningful outcome to each score with relation to odor intensity.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Type d'étude
Inscription (Anticipé)
Contacts et emplacements
Lieux d'étude
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Leuven, Belgique, 3000
- Recrutement
- Department of Periodontology, Faculty of Dentistry, Catholic University of Leuven
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Sous-enquêteur:
- Jesica Dadamio, Master Bioch
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Chercheur principal:
- Marc Quirynen, PhD, DDS
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Contact:
- Marc Quirynen, PhD, DDS
- Numéro de téléphone: +32 16 33 24 85
- E-mail: marc.quirynen@uzleuven.be
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Contact:
- Jesica Dadamio, Master Bioch
- Numéro de téléphone: +32 16 34 72 82
- E-mail: jesica.dadamio@med.kuleuven.be
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
Méthode d'échantillonnage
Population étudiée
Hundred consecutive adult subjects consulting the bad breath clinic who meet the inclusion criteria.
Number of volunteers extended to 150 in March 2012 (Amendment Research Agreement)
La description
Inclusion Criteria:
- Adults (≥18 years
- With no evidence of bad breath or bad breath of intra-oral cause (oral malodour)
- Non-smokers or smokers from whom the organoleptic evaluation can be performed (no interference from smoke odour)
Exclusion Criteria:
- Smokers from whom the organoleptic evaluation can not be performed because of interference from smoke odour
- Presence of active caries
- Presence of sinusitis or any other Oro-pharyngeal problem
- On medications which can cause malodour
- Reduced salivary flow due to pathological reasons (e.g. Sjögren syndrome)
- Any oral pathophysiological condition or any oral disease (e.g. oral cancer, mucositis)
- Pregnancy and nursing
- Situation considered not compatible with the study according to the investigator's opinion; the latter includes: persons under homeopathic therapy, patients who used antibiotics during the 2 months before the study, patients frequently using chewing gum, patients under corticosteroids or other serious medications.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
Intervention / Traitement |
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Healthy adults
Subjects consulting a bad breath clinic at the Department of Periodontology, KULeuven
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Colour evaluation of a strip
Autres noms:
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
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Colour evaluation of the new chair side test
Délai: Once (during the first consult to the clinic)
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The colour will be assessed before all the other test and after 4 minutes of contact between the strip and the saliva of the volunteer.
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Once (during the first consult to the clinic)
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
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Organoleptic evaluation (OS)
Délai: Once (during the first consult to the clinic)
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The OS will be determined by a trained and calibrated judge as described in the literature.
Briefly, patients will be asked to count from one to eleven and the judge rated the exhaled air on a 0 to 5 score ( 0 represents absence of odour, 1 is given for barely noticeable odour, 2 for slight malodor, 3 for moderate malodor, 4 for strong malodor and 5 for severe malodor).
The judge will also evaluate nasal breath in order to exclude extra-oral causes of halitosis and the odor of a sample of the tongue coating, if present.
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Once (during the first consult to the clinic)
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Total VSC reading
Délai: Once (during the first consult to the clinic)
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The global concentration of sulphur containing compounds will be measured using a portable breath analyzer (Halimeter®, Interscan cooperation, Chatsworth, US.
The maximum level attained (ppb) is determined by direct readings from the analog scale of the monitor.
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Once (during the first consult to the clinic)
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Specific VSC readings
Délai: Once (during the first consult to the clinic)
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Hydrogen sulphide, methyl mercaptan and dimethyl sulphide will be measured using a commercially available system (OralChroma™, Abilit Corporation; Osaka City, Japan).
This portable gas chromatograph is equipped with an indium oxide semiconductor gas sensor.
The concentration values (ppbv) of the three gases will be recorded.
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Once (during the first consult to the clinic)
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Marc Quirynen, PhD, DDS, Universitaire Ziekenhuizen KU Leuven
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Anticipé)
Achèvement de l'étude (Anticipé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 20100914
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