Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Post-extraction Wound Healing in Patients With Type 2 Diabetes (PEWHPD)

This study has been completed.
Fundação de Amparo à Pesquisa do Estado de São Paulo
Information provided by (Responsible Party):
Karin Sa Fernandes, University of Sao Paulo Identifier:
First received: March 23, 2010
Last updated: July 16, 2014
Last verified: July 2014
The purpose of this study is to evaluate clinical healing after dental extraction and the occurrence of surgical complications in patients with type 2 diabetes and compare with non-diabetic patients or control, taking into account laboratory data such as blood count, glycated hemoglobin (HbA1) and immunological profile of the patients.

Condition Intervention
Type 2 Diabetes
Procedure: Dental extractions

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Single Blind (Participant)
Primary Purpose: Treatment
Official Title: Post-extraction Wound Healing in Patients With Type 2 Diabetes

Resource links provided by NLM:

Further study details as provided by University of Sao Paulo:

Primary Outcome Measures:
  • postoperative complications [ Time Frame: 3, 7, 21, and 60 postoperative days ]
    Postoperative complications included the following signs and symptoms: edema; erythema; alveolar bone exposure; halitosis; trismus; fever; cellulitis; Ludwig's angina; loss of appetite; malaise; itching; moderate pain (as assessed by a visual analog scale); and unpleasant taste.

Secondary Outcome Measures:
  • Delayed wound healing [ Time Frame: 3, 7, 21, and 60 postoperative days ]
    According to the literature, the dental alveolus is filled with blood clot and fibrin at 3 days after dental extraction; on postoperative day 7, the alveolus is filled with granulation tissue; on postoperative day 21, wound epithelialization is complete; and on postoperative day 60, alveolar bone formation can be observed on a dental radiographic image. Delayed wound healing was defined as a delay in any of the aforementioned events.

Enrollment: 82
Study Start Date: March 2010
Study Completion Date: June 2014
Primary Completion Date: May 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: post-extraction wound healing
53 individuals with diabetes and 29 controls, without diabetes, were followed for 60 days after dental extractions, and were examined after 3, 7, 21, and 60 postoperative days.
Procedure: Dental extractions
All dental extractions were performed at an outpatient clinic at the USP Dental School. In addition, all extractions were performed under local anesthesia by the same experienced dentist, in accordance with the standards established by Peterson et al (2008).

Detailed Description:

It has been established in scientific literature that patients with diabetes have a greater predisposition to oral complications and that oral infections may compromise their metabolic control. There is scant clinical evidence of a relationship between diabetes and an increased risk of infection after dental extractions. To our knowledge, no prospective longitudinal studies have been designed to prove this hypothesis.

The aim of this study is to evaluate clinical healing after dental extraction and the occurrence of surgical complications in patients with type 1 and 2 diabetes and compare with non-diabetic patients, taking into account laboratory data such as blood count, glycated hemoglobin (HbA1) and immunological profile of the patients.

Ninety patients shall be prospectively studied, divided into 3 groups: Group 1 will consist of 30 patients with uncontrolled type 2 diabetics patients, group 2 will consist of 30 controlled type 2 diabetics patients and group 3 composed of 30 non-diabetic patients (control group).

All patients will undergo extraction of erupted teeth, always carried out by the same dentist (MS).

A complete medical history and laboratory tests will be conducted for all patients including: glycated hemoglobin (HbA1), fasting glucose, complete blood count, platelets, prothrombin time (PT), partial thromboplastin time (PTT), immunoglobulins (IgA, IgG and IgM), CD3, CD4, CD8, testing of complement (C3, C4), dihydrorhodamine (DHR) oxidation, phagocytosis index test and neutrophil chemotaxis.

At the end of surgery, blood pressure and plasma glucose by finger prick will be measured again. Surgery characteristics will be recorded, such as: length of surgery time from anesthesia to sutures, whether forceps and/or lever were used, the need to use a flap approach, the number of vials of anesthetic used, and intra-ligament anesthesia.

The clinical assessment of healing will take place 3, 7, 21, and 60 days after surgery and will be performed by the same dentist who perform the surgeries (KSF), blinded to the group of the patient and laboratory exams. On these days, the region will be examined, photographed and will be applied to the Visual Analogic Scale (VAS).

On day 60 after surgery, the postoperative period will be classified as: 1) no complications or 2) with complications, according to Cheung et al 2001. The following situations will be considered as complications after dental extraction:

  1. Acute infection of the alveolus: pain, erythema, edema, purulent discharge and fever;
  2. Acute inflammation of the alveolus: pain, inflamed alveolar tissue, absence of pus and fever;
  3. Dry socket: persistent pain and exposure of the alveolar bone.

All this clinical information will determine the post-operative quality regarding the healing time and occurrence of infection and inflammation of the alveoli.

Data will be statistically analyzed in order for us to understand the pattern of healing and occurrence of complications after dental extraction in the studied groups. The data analyzed will include hematological data, immunological profile and the glycated hemoglobin of patients.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • All patients will be treated at the dental clinic of CAPE-FOUSP (Special Care Dentistry Center, School of Dentistry, University of São Paulo), and will be selected for the study when they require simple extraction of the first or second lower molar.

Exclusion Criteria:

  • Patients that will be excluded from both groups are those who come to the clinic in an emergency dental situation, those who are using (or have used within one month previous) hormones, antibiotics, anti-inflammatory drugs, bisphosphonates, smokers, drug users and chronic alcohol users. Patients with thyroid disorders and those who are unable to measure capillary blood glucose at home will also be excluded.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01091909

School of Dentistry of University of São Paulo
São Paulo, SP, Brazil, 055508-000
Sponsors and Collaborators
University of Sao Paulo
Fundação de Amparo à Pesquisa do Estado de São Paulo
Study Chair: Marina Gallottini, PhD Head of the Special Care Dentistry Center of Dental School of University of Sao Paulo
  More Information

Responsible Party: Karin Sa Fernandes, PhD student, University of Sao Paulo Identifier: NCT01091909     History of Changes
Other Study ID Numbers: FR- 225568
Study First Received: March 23, 2010
Last Updated: July 16, 2014

Keywords provided by University of Sao Paulo:
type 2 diabetes
wound healing
neutrophil count
dental extraction

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases processed this record on May 25, 2017