Journal
ANGLE ORTHODONTIST
Volume 82, Issue 2, Pages 242-246Publisher
E H ANGLE EDUCATION RESEARCH FOUNDATION, INC
DOI: 10.2319/060711-373.1
Keywords
Tooth loss; Mandible
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Funding
- National Council for Scientific and Technological Development (CNPq), Ministry of Science and Technology, Brazil
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Objective: To evaluate the effects of unilateral and bilateral premature loss of posterior occlusal support on mandibular bone dimensions in growing rats. Materials and Methods: Thirty female Wistar rats (5 weeks old) were randomized into three groups: control, unilateral mandibular molar teeth extraction, and bilateral mandibular molar teeth extraction. After 8 weeks, animals were sacrificed and acrylic rapid-prototyped templates of the mandibles were constructed. Mandibular length, ramus height, intercondylar distance, and body weight were measured and analyzed by one-way analysis of variance (Tukey test as post hoc test; alpha = .05). Results: Mandibular length and intercondylar distance were significantly shorter in experimental animals, while no difference was observed for ramus height and body weight. Conclusions: Unilateral and bilateral premature loss of posterior occlusal support in growing rats results in a smaller mandible at skeletal maturity. (Angle Orthod. 2012;82:242-246.)
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