Blood Coagulation Disorders
Conditions
Keywords
Tooth Extraction, Surgical Hemostasis, Platelet Aggregation Inhibitors, Chitosan
Brief summary
The purpose of this study is to compare two hemostatic agents in patients under dual antiplatelet therapy using the intraoral bleeding time after dental extractions.
Detailed description
Postoperative hemostasis is a fundamental patient management issue in the oral and maxillofacial surgery setting. The risk of excessive bleeding prompts physicians to stop multiple antiplatelet agents before minor surgery, which puts coronary stenting patients at risk for adverse thrombotic events. Adequate hemostasis must be achieved in order to make oral surgeries possible for these patients without discontinuation of the antiplatelet regimen. The HemCon Dental Dressing (HemCon Medical Technologies, Inc, Beaverton, OR) is a novel chitosan-based hemostatic agent which may greatly improve upon the efficacy of wound healing and hemostasis both in extent and time for minor oral surgeries. Dental extractions will be performed in patients under dual antiplatelet therapy without altering their medication regimen. All patients will require to have two or more surgical sites so they will have internal surgical control sites. Cutaneous bleeding time and platelet aggregation tests will be obtained prior to extractions. The primary hemostasis will be evaluated by measuring the intraoral bleeding time after each extraction and further bleeding and healing outcomes will be ascertain by phone questionaires and clinical evaluations. The aim of this study is to evaluate the effectiveness of HemCon Dental Dressing in controlling post extraction bleeding and to ascertain its role in healing of extraction wounds compared to a standard haemostasis method.
Interventions
DEVICEHemCon Dental Dressing
The Hemcon Dental Dressing is an oral wound dressing made of chitosan.
DEVICEOxidized Cellulose Gauze
A common hemostatic measure after dental extractions placed into the extraction socket.
Sponsors
University of Sao Paulo General Hospital
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE (Subject)
Masking description
The participant (patient) does not know which site received the study local hemostatic or the control local hemostatic.It is not possible for the surgeon to be blinded in this case.
Intervention model description
Single-blind, Randomized, Split-mouth
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients requiring two or more dental extraction procedures. * Patients must be under dual antiplatelet therapy of any kind. * Patients must be 18 years of age or older. * Patients must be available for a minimum of one post operative evaluation to be scheduled at the time of the procedure approximately 7 days post surgery. * Extraction sites do not require primary closure of suturing. * Willingness and ability to provide informed consent
Exclusion criteria
* Patients who are currently undertaking other anticoagulant medications (e.g., aspirin, coumadin, heparin) or have discontinued their anticoagulant medications. * History of heart attack in less than 1 week. * Patients with seafood allergy. * Unable of unwilling to provide informed consent.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Primary bleeding | Intraoperative | Primary bleeding will be evaluated by recording the intra-oral bleeding time. The extraction site will be observed for 2 min without gauze in place. At the end of 2 min, gauze is placed over the extraction site to remove blood extending beyond the tooth socket. After blotting the extraction site, any bleeding that extends beyond the crest of the socket will be recorded as a positive test result (i.e., onto surrounding gingival tissues) during an observation period of 1 min. This same procedure was performed at 5, 8, 11, 14, and 20 min after the extraction. Intra-oral bleeding time is defined as the length of time for bleeding to cease to extend beyond the tooth socket. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Point-of-care platelet function test | Day before dental extraction | Blood platelet function plays a pivotal role in hemostasis during surgery and following traumatic injuries. The ability to assess platelet function before the intervention is desirable in patients undergoing dental extraction procedures. A point-of-care platelet function test (Multiplate - Roche Diagnostics, Mannheim, Germany) will be performed the morning before dental extraction to assess platelet function inhibition due to dual antiplatelet therapy. |
Other
| Measure | Time frame | Description |
|---|---|---|
| Secondary bleeding (T1) | 10-15 hours after dental extraction | Secondary bleeding (T1) will be evaluated by telephone with standardized questionnaire including the following: whether bleeding occurred after the individual left the dental clinic (y/n); whether gauze was needed to be placed due to bleeding (y/n); and whether an emergency service or dental clinic was visited due to bleeding (y/n). |
| Secondary bleeding (T2) | 45-50 hours after dental extraction | Secondary bleeding (T2) will be evaluated by telephone with standardized questionnaire including the following: whether bleeding occurred after the individual left the dental clinic (y/n); whether gauze was needed to be placed due to bleeding (y/n); and whether an emergency service or dental clinic was visited due to bleeding (y/n). |
| Intra patient healing comparison | 1 week post surgery | Healing will be compared between the study and control sites and assessed on a scale of 1-3 with 1 representing the healing of the study site being significantly worse than the control; 2 representing the healing of the study site being the same as the control, and 3 meaning the healing of the study site was significantly better than the control. |
Countries
Brazil
Outcome results
None listed