Three-dimensional finite element analyses of stress distribution on periodontal tissue of maxillary dentition under various alveolar bone altitude conditions;

Construction of three-dimensional finite element models of maxillary dentition and MBT straight wire appliance;

Method:A maxillary edentulous jaw was restored by four-implants-supported fixed bridge and extracoronal resilient attachment denture.

Objective: To develop the stress distribution variation when restore maxillary edentulous jaw with different cantilever arm length and implant place, to get a better design proposal.

ObjectiverTo develop a new method to restore maxillary edentulous jaw with front fixed bridge supported by implants and back attachment denture and choose a more reasonable design by comparing stresses of two kinds of attenchments(rigid and resilient) and different implant number and place.

Palatally impacted maxillary canine is common in clinic which affects the function and aesthetic of maxillary teeth.

Objective To analysize the etiology, clinical examination, suitable diagnosis and treatment of impacted maxillary canines.

Maxillary canine impaction is a common problem in orthodontics, and is considered to be the most complex domain in orthodontics because of the uncertainty of its etiology and prognosis and the diversity of the treatment options.

Objective To investigate root canal curvature in maxillary anterior teeth.