Induced Gingivitis & Intra-oral Imaging

University of Washington16 enrolled

Overview

Using an experimental, non-invasive intra-oral imaging device, this study evaluates the effects on the gingival tissue when oral hygiene is stopped in a section of the mouth for two weeks and gingivitis develops. The effects on the gingival tissue continues to be evaluated as oral hygiene is resumed and the gingival tissue returns to health.

The study will include the following phases - 1) Hygiene phase of 2 weeks; 2) Gingivitis induction phase with stent lasting up to 2 weeks; and 3) Resolution phase of 2 weeks. The intervention will consist of cessation of oral hygiene versus an active control of oral hygiene with a fluoridated toothpaste. This study is a modification of classical experimental gingivitis model. The study will prospectively enroll subjects and assign a maxillary sextant to the intervention, while the other sextant will serve as control in a split-mouth design of localized experimental gingivitis, utilizing localized stent-induced biofilm overgrowth model (SIBO). The intervention, i.e. oral hygiene cessation will manipulate the participants' oral environment by leading to reversible inflammation of the gingival tissues. The purpose of this study is to evaluate the effects of oral hygiene cessation in the gingival tissues by an innovative non-invasive microimaging technique, i.e. Optical coherence tomography (OCT).

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

DIAGNOSTIC

Masking

NONE

Enrollment

Conditions

Plaque Induced Gingivitis

Interventions

Plaque induced gingivitisDEVICE

Non-invasive microimaging (OTC device) of gingival tissue where oral hygiene cessation utilizing localized stent-induced biofilm overgrowth model (SIBO), will manipulate the participants' oral environment by leading to reversible inflammation of the gingival tissues.

Oral hygiene maintenanceDEVICE

Non-invasive microimaging (OTC device) of gingival tissue where oral hygiene has been maintained by tooth brushing with fluoride toothpaste and flossing twice daily.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 35 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * In good general health, ASA I * No clinical signs of gingival inflammation at \>90% sites observed * Probing Depth(PD) ≤ 3.0 mm * Attachment Loss (AL) = 0 mm * Gingival health at baseline visit (Day 0): Gingival Index (GI) ≤ 0.5, Bleeding on probing (BOP)(-) * Fluent in English Exclusion Criteria: * • Medical condition which requires premedication prior to dental treatments/visits * Subjects unable or unwilling to undergo informed consent process. * Subjects currently using anti-gingivitis oral rinses (washout period of 1 week) * History of periodontal disease * History of systemic inflammatory or immune conditions * Use of antibiotic or anti-inflammatory drugs within 30 days of enrollment * Pregnant or breastfeeding at time of screening * Concurrent orthodontic treatment * Untreated carious lesions and/or inadequate restorations, implants, crowns on maxillary non-molar teeth * Participation in any other clinical study or test panel within 1 week prior to enrollment into this study * Use of tobacco products * Subjects who must receive dental treatment during the study dates * Orthodontic bands, appliances, or crowns and bridges, or removable partial dentures affecting the non-molar maxillary teeth * Immune compromised individuals (HIV, AIDS, immuno suppressive drug therapy)

Locations (1)

University of Washington School of Dentistry

Seattle, Washington, United States

Outcomes

Primary Outcomes

Change From Baseline Gingivitis at Day 14 as Measured by Non-invasive Microimaging and Gingival Index.

The predictive validity of a non-invasive microimaging technique for assessing experimental gingivitis (plaque induced), as compared with gingival index is not reported. The microimaging technique was used to measure changes in the gingival thickness of the inter-dental tooth area. This area measured did not represent the clinical status of the tissue surrounding the tooth. The gingival index is reported. Loe and Silness Gingival Index (GI); scale: 0 = normal gingiva, 1 = mild inflammation, 2 = moderate inflammation, 3 = severe inflammation

Time frame: Baseline to Day 14

Change From Day 14 Gingivitis at Day 28 as Measured by Non-invasive Microimaging and Gingival Index.

Time frame: Day 14 to Day 28

Secondary Outcomes

Change From Baseline Gingivitis at Day 14 as Measured by Non-invasive Microimaging and Plaque Index.

The predictive validity of a microimaging technique for assessing experimental gingivitis, as compared with plaque index is not reported. The microimaging technique was used to measure changes in the gingival thickness of the inter-dental tooth area. This area measured did not represent the clinical status of the tissue surrounding the tooth. The plaque index is reported. Visible Plaque Index; scoring: 0 = no plaque; 1 = visible plaque

Time frame: Baseline to Day 14

Change From Day 14 Gingivitis at Day 28 as Measured by Non-invasive Microimaging and Plaque Index.

Data from ClinicalTrials.gov

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