Periodontal response to orthodontic tooth movement in diabetes-induced rats with or without periodontal disease.

Background: Systemic conditions can influence orthodontic tooth movement. This study evaluates histologic periodontal responses to orthodontic tooth movement in diabetes-induced rats with or without periodontal disease.

Methods: Forty Wistar rats were divided according their systemic condition (SC) into diabetic (D) and non-diabetic (ND) groups.

Dentoalveolar changes after unilateral extractions of mandibular first molars and their influence on third molar development and position.

Aim: To investigate the spontaneous tooth position changes after unilateral extraction of mandibular first molars and the influence on third molar position.

Methods: Panoramic radiographs of 111 individuals (mean age 19 years 8 months) in whom one mandibular first molar was extracted at least 5 years prior. Comparison of all measurements of the control and the affected side was performed by paired Student t test.

Patients' report of discomfort and pain during debonding of orthodontic brackets: a comparative study of two methods.

Aim: To examine the level of discomfort and pain reported by patients during debonding of orthodontic metallic brackets by comparing two of the most popular methods, since discomfort can negatively influence patients' motivation to undergo orthodontic treatment.

Methods: This split-mouth designed study involved 37 patients. Two methods were used for bracket removal: a lift-off debonding instrument and a ligature-cutting plier.