Post Occlusive Reactive Hyperemia on Gingiva Assessed by Laser Speckle Contrast Imaging

Semmelweis University

Status: Completed

Conditions: Ischemia

Treatments: Procedure: strangulation

Study type: Interventional

Funder types: Other

Identifiers

NCT02552498

2/2013 (Other Grant/Funding Number)

Details and patient eligibility

About

Apply the LASCA for follow-up the postocclusive microcirculation after strangulation of the gingiva in order to characterize the kinetics of the blood flow changes in human subjects.

Full description

During surgical endodontics the cortical bone is exposed by elevating a full- thickness tissue flap. Cutting across mucosal blood vessels disturbs perfusion and causes ischemia. On the other hand, preserving sufficient blood flow of the soft tissue segment is important for the postoperative wound healing. In order to minimize the damage of the microvasculature of the operated area, the incision should be properly designed.

The investigators will model surgical incisions by strangulation of the gingiva of healthy human subjects based on the commonly applied endodontic incision such as horizontal, vertical and papilla base. The primary aim is to determine the effect of a short term disruption of the blood flow at the respective region on the surrounding area in order to assess the functionally active collateral circulation. Using Laser Speckle Contrast Analysis (LASCA), which provides blood perfusion data, the investigators will have the possibility to detect functional alterations in gingival microcirculation during and after a short term of strangulation. The secondary aim is to assess the time course of the restoration of the circulation on the affected area.

Enrollment: 17 patients

Sex: All

Ages: 20 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• general good health

Exclusion criteria

• pregnancy
• smoking
• general diseases
• medicine taking except contraceptives

Trial design

Primary purpose: Basic Science

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

17 participants in 3 patient groups

vertical

Experimental group

Description:

Strangulation is applied on the the buccal side of the attached gingiva, parallel to the long axis of tooth 12, at the distal third of the tooth.

Treatment:

Procedure: strangulation

horizontal

Experimental group

Description:

Strangulation is applied on the buccal side of the attached gingiva, perpendicular to the long axis of the tooth 12, 2 mm far from the gingival margin.

Treatment:

Procedure: strangulation

papilla base

Experimental group

Description:

Strangulation is applied on the the buccal side of the attached gingiva, on the base of the mesial papilla of tooth 12, in straight line going from one side of papilla to the other.

Treatment:

Procedure: strangulation