What is the purpose of a face bow transfer?
Facebow transfers are used in prosthetic dentistry to record the anteroposterior and mediolateral spatial positions of the maxillary occlusal cusps in relation to the transverse opening and closing of the patient’s mandible. Two types of facebows are recognized in the field of prosthodontics, arbitrary and kinematic.
When using a face bow which model is mounted first?
the maxillary model
Face-bow mounting of the maxillary model is the first step in the mounting process. Many types of face-bows are available and relate to the various articulators. One of the most common is an earbow, which uses the ear as a reference point.
What is face bow registration?
Face Bow Registration (gnathological treatment) is a special part of dentistry. First a dental examination takes place, namely the occlusion of the upper and lower jaws, that is, the fitting of the upper and lower teeth against each other in order to determine how the joints and muscles of the jaws are functioning.
What is jaw relation?
Jaw relation (or the maxillomandibular relationship) refers to the position of the mandible (lower jaw) relative to the two maxillae (upper jaw) and can be described as a tooth-to-tooth relationship between maxillary and mandibular teeth or as a bone-to-bone relationship between the maxillae and mandible.
Why is canine guidance important?
This is because canine guidance will produce immediate disclusion of posterior teeth in excursions (one aspect of what is known as a ‘mutually protected occlusion’). Disclusion of the posterior teeth will reduce lateral forces on these teeth, reducing the chance of fracturing teeth/restorations.
Why is jaw relation important?
Accurate determination, recording and transfer of jaw relation records from edentulous patients to the articulator is essential for the restoration of function , facial appearance and maintenance of patient’s health.
What is the purpose of curve of Spee?
Curve of Spee is a naturally occurring phenomenon in the human dentition. This normal occlusal curvature is required for an efficient masticatory system. Exaggerated curve of Spee is frequently observed in dental malocclusions with deep overbites.
Why is anterior guidance important?
It plays a very important role in protecting the posterior teeth from protrusive and lateral stresses by discluding effect. An unfavorable anterior guidance contributes to anterior alveolar bone loss and teeth mobility when there are susceptible periodontal tissues and excessive forces.
What is incisal guidance?
Incisal guidance is the path on the lingual surface of the maxillary anterior teeth along which the mandibular anterior teeth glide, in neutro- or distoocclusion.
What is VDO measurement?
Vertical dimension of occlusion (VDO) has been defined as the lower facial height measured between two points when the maxillary and mandibular teeth are intercuspated. Thus, it is the vertical position of the mandible in relation to maxilla when the occluding members are in contact.