Histomorfologic and Histomorphometric study of bone healing in isquemic socket condition induced in rats treated with ozonized oil

Author(s)

Maria Del Pilar Rodriguez Sanchez

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia (FO/SDO)
• Defense date: 2011-05-09

Examining board members

Maria Cristina Zindel Deboni; Luciana Corrêa; Wilfredo Milquíades Irrazabal Urruchi

• Advisor: Maria Cristina Zindel Deboni

Abstract

Dry socket is an inflammatory postoperative complication, following teeth extraction. Treatment generally includes palliative care and its etiology is controversial. The present study, proposes to evaluate histological and histomorphemetrical aspects of alveolar healing in rats submitted to dry socket condition and treatment by ozonized sunflower oil and Alveoliten®. Under general anesthesia by intramuscular application of 0,8mg/kg ketamine hydrochloride (Dopalen® - Vetbrands) and 0,3mg/kg xylazine chloridrate (Rompum® - Bayer SA), 84 female Wistar rats were submitted to upper right incisor.. 72 of those animals were submitted to dry socket isquemic condition by adrenalin (1:100.000) intra alveolar insertion for five minutes. Groups were divided as follow: group I: dry socket treated with sunflower oil (n=20); group II: dry socket treated with ozonated oil (peroxide 87,3 mEq/Kg and 0,4 of acidity) (n=20); group III: dry socket treated by Alveoliten® (n=20); group IV dry socket without treatment (n=12); and group V: dental extraction without dry socket induction (n=12). Rats were euthanized in a carbon dioxide (CO2) chamber . after 2, 7,14 e 21 subsequent treatment. Right maxilla was split following the intermaxilary suture, later it was coronal sliced distally to molar teeth. Specimens were processed for histological and histomorphemetrical analyses. Histomorphometric data were statistically analyzed by Kruskal-Wallis and Conover non parametric tests to establish differences between treatments. Histological findings showed inflammatory infiltrate even 14 days after treatment. It was seen also expressive new bone formation when Alveoliten® was employed. There were significant differences between treatments after seven (p=0.0010), fourteen (p=0.0320) twenty one days (p=0.0222). Ozonated sunflower oil was able to induce intense inflammatory infiltrate during the first period of observation but it promoted bone growth on the following periods . Under controlled conditions of this study; alveolar bone healing was superior when Alveoliten® was applied. (AU)

• FAPESP's process: 09/03413-9 - Ozonized oil in dry socket wound healing a study in rats.
• Grantee: Maria Del Pilar Rodriguez Sanchez
• Support Opportunities: Scholarships in Brazil - Master