Objectives: 1) To determine tooth size ratios in Saudi subjects with Class II, Division 1 malocclusion, 2) to compare tooth size ratios between Saudi males and females and 3) to compare tooth size ratios between Saudi subjects with Class II, Division 1, and Saudi subjects with Class I normal occlusion, and Bolton’s results. Methods: The current study consisted of study models of sixty subjects ...

foreign body ingestion especially in large sizes is seen in children and people with mental illness like mental retardation. the patient is a 19-year-old woman without mental illness. she swallowed one tooth-brush during tooth- brushing, which passed through the esophagus and went in to the stomach and stuck there. after primary endoscopy, was determined that tooth-brush was adult size and its ...

Tooth root crack is considered as one of the crucial causes of failure in the gearing system and it occurs at the tooth root due to an excessive bending stress developed in the root region. The modern power transmission gear drives demand high bending load capacity, increased contact load capacity, low weight, reduced noise and longer life. These subsequent conditions are satisfied by the aid o...