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Changes in Bad Breath and Olfactory Function After Extraction of Carious Teeth

9 november 2026 uppdaterad av: Rojdan Ferman GÜNEŞ UYSAL, Batman University

The Effect of Dental Caries on Halitosis Awareness and Olfactory Functions

This study aims to evaluate changes in halitosis and olfactory function in adults with advanced dental caries requiring tooth extraction.

A total of 80 adult patients aged 18-65 years with one or more teeth indicated for extraction due to advanced dental caries will be included. Tooth extractions will be performed under local anesthesia using an atraumatic technique as part of routine dental care. The extraction sockets will be allowed to heal by secondary intention.

Assessments will be performed before tooth extraction and 21 days after the last extraction. Halitosis will be evaluated by a single trained and blinded examiner using the organoleptic scoring method (OLS). Participants will also rate their perceived halitosis using a visual analog scale (VAS).

Olfactory function will be assessed using the Sniffin' Sticks test, which consists of three components: odor threshold, odor discrimination, and odor identification. The scores of these three tests will be combined to calculate the total TDI score.

The preoperative and postoperative results will be compared to investigate changes in halitosis and olfactory function following the removal of carious teeth.

Studieöversikt

Status

Avslutad

Betingelser

Studietyp

Observationell

Inskrivning (Faktisk)

80

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 65 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Testmetod

Icke-sannolikhetsprov

Studera befolkning

The study population consists of 80 adults aged 18-65 years with one or more teeth indicated for extraction due to advanced dental caries. Participants are systemically healthy, non-smokers, and have healthy periodontal tissues or have completed periodontal treatment before enrollment. Both male and female participants are included. Tooth extractions are performed under local anesthesia using an atraumatic technique as part of routine clinical care. Halitosis and olfactory function are assessed before tooth extraction and 21 days after the last tooth extraction. Participants who do not meet the eligibility criteria are excluded from the study.

Beskrivning

Inclusion Criteria:

Adults aged 18-65 years. Patients with one or more teeth indicated for extraction due to advanced dental caries.

Systemically healthy individuals. Non-smokers. Individuals with healthy periodontal tissues or those who have completed periodontal treatment before enrollment.

Exclusion Criteria:

History of loss of smell or changes in olfactory function within the two weeks preceding the olfactory assessments and tooth extraction.

Use of antibiotics or anti-inflammatory medications for more than 7 consecutive days within the preceding 6 weeks.

Presence of an upper respiratory tract infection at the time of assessment. History of COVID-19 infection. Pregnancy. Lactation. Traumatic tooth extraction or extraction procedures requiring flap elevation. Development of alveolar osteitis (dry socket) during the postoperative follow-up period.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Observationsmodeller: COHORT
  • Tidsperspektiv: PROSPECTIVE

Kohorter och interventioner

Grupp / Kohort
Adults Undergoing Extraction of Carious Teeth

This cohort consists of adults aged 18-65 years who underwent extraction of one or more teeth due to advanced dental caries as part of routine clinical care. Tooth extractions were performed under local anesthesia using an atraumatic technique, and the extraction sockets were allowed to heal by secondary intention.

Participants underwent assessments of halitosis and olfactory function before tooth extraction and 21 days after the last extraction. Halitosis was evaluated using an organoleptic scoring method and a patient-reported visual analog scale (VAS). Olfactory function was assessed using the Sniffin' Sticks test, including threshold, discrimination, and identification components (TDI score).

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in Organoleptic Score (OLS) from Baseline to Follow-up
Tidsram: At baseline (before tooth extraction) and 21 days after the last tooth extraction.

Halitosis will be assessed by a single trained and blinded examiner using the organoleptic scoring method (OLS). Participants will be instructed to keep their mouths closed, breathe through their noses, and then exhale through their mouths. The examiner will assess the odor of the exhaled breath using a 6-point scale ranging from 0 to 5, where 0 indicates no detectable odor and 5 indicates extremely strong odor. Changes in OLS scores between baseline (before tooth extraction) and follow-up will be evaluated.

At baseline (before tooth extraction) and 21 days after the last tooth extraction.

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in Patient-Perceived Halitosis Severity (VAS) from Baseline to Follow-up
Tidsram: At baseline (before tooth extraction) and 21 days after the last tooth extraction.

Participants will assess their perceived halitosis severity using a 10-point visual analog scale (VAS), ranging from 0 (no perceived bad breath) to 10 (extremely severe bad breath). Changes in VAS scores between baseline (before tooth extraction) and follow-up will be evaluated.

At baseline (before tooth extraction) and 21 days after the last tooth extraction.
Change in Olfactory Function (Sniffin' Sticks TDI Score) from Baseline to Follow-up
Tidsram: At baseline (before tooth extraction) and 21 days after the last tooth extraction.

Olfactory function will be assessed using the Sniffin' Sticks test, consisting of three components: odor threshold (T), odor discrimination (D), and odor identification (I). The threshold test evaluates the lowest odor concentration that participants can detect. The discrimination test assesses the ability to distinguish between different odors, while the identification test evaluates the ability to identify familiar odors from multiple-choice options. The scores of the three components will be summed to obtain the total TDI score. Changes in total TDI scores between baseline and follow-up will be evaluated.

At baseline (before tooth extraction) and 21 days after the last tooth extraction.

Samarbetspartners och utredare

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Sponsor

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

6 maj 2026

Primärt slutförande (Faktisk)

27 maj 2026

Avslutad studie (Faktisk)

1 juli 2026

Studieregistreringsdatum

Först inskickad

9 november 2026

Först inskickad som uppfyllde QC-kriterierna

9 november 2026

Första postat (Faktisk)

13 november 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

13 november 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

9 november 2026

Senast verifierad

1 november 2026

Mer information

Termer relaterade till denna studie

Andra studie-ID-nummer

  • 2026/02-03

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