VoxLim

HA020 Wound Healing in type 2 diabetes patients undergoing dental
extraction
Fernandes KS*, Souza MS, Kokron CM, Glick M, Gallottini MHC
Estomatologia - UNIVERSIDADE DE SÃO PAULO - SÃO PAULO.
E-mail: karinsf@gmail.com
The aim of this study was to determine whether type 2 diabetes (DM) patients undergoing
dental extraction are at an increased risk of postoperative complications and delayed wound
healing, considering metabolic control and the immunological profile. This prospective casecontrol
study involved 53 patients with DM (study group=SG) and 29 without (control
group=CG). All participants underwent extractions of erupted teeth. Clinical assessments of
healing were performed on day 3, 7, 21, and 60 after surgery. Glycated hemoglobin (A1c),
neutrophil chemotaxis, oxidative burst, neutrophil phagocytosis were measured at the time
of the extraction. On day 60 all sockets were epithelialized, with no signs of infection, and
asymptomatic. Postoperative complications (unpleasant taste, malaise, trismus, and loss of
appetite) were more common in the CG (7/29; 24%) than in the SG (1/53; 1.9%). Delayed
wound epithelialization was observed only in the SG patients. Of those, 9 (17%) showed
incomplete epithelialization at 21 days after surgery (p=0.023). There was no association of
delayed epithelialization with high A1c levels, decreased neutrophil chemotaxis, decreased
neutrophil phagocytosis, or decreased neutrophil oxidative burst.
Our results show that type 2 diabetes per se is not a risk factor for postoperative complications
in individuals undergoing dental extraction. Although individuals with type 2 diabetes are at
an increased risk of delayed epithelialization of the surgical wound, delayed epithelialization
has no impact on alveolar bone healing. (Apoio: FAPESP - 2009-109345)
HA021 Stress distribution around dental implants with different insertion
depths: a photoelastic study
Zanardi PR*, Sesma N, Stegun RC, Costa B, Mori M, Mukai MK, Lagana DC
Prótese Dentária - UNIVERSIDADE DE SÃO PAULO - SÃO PAULO.
E-mail: pieroznd@gmail.com
The progressive bone loss at the neck of the implant is a clinical concern since it affects
the maintenance of dental esthetics. The stress concentration, the connection type and the
microgap appear to be factors that cause alterations at the marginal bone level. The present
study evaluated the influence of insertion depth, prosthetic connection and type of loading on
the stress distribution around dental implants, using photoelastic methodology. Three blocks
of photoelastic resin for each type of implant connection (external hexagon, external hexagon
flattened, internal hexagon and Morse taper) were built. Each block differed in the position
of the implant platform in relative to the upper margin of the block: I (2mm below), II (at
the same level) and III (2mm above). A 100N force was applied to both a straight and tilted
abutments. A multiple linear regression showed the relation between the stress distribution and
the insertion depth. For all the implant types, both with straight and tilted abutments, Group
I presented the lowest stress concentration around the fixture when compared to group II and
III(p