2 The Prosthodontics is a part of the dental science that improve the esthetic and functional aspects of the oral and maxillofacial region through artificial restoration of the lost teeth and adjacent soft tissues
3 Complete denture Prosthodontics The part that restore all the natural teeth and related tissue artificially
4 Removable partial denture Prosthodontics The part that restore one or more absent teeth and soft tissue through removable prosthesis
5 Fixed Prosthodontics The part that restore one or more absent teeth through fixed prosthesis
6 Dentulous – Full complement of teeth. Edentulous – Lost all the teethPartially edentulous – Lost a few teeth
8 Surfaces of teeth –MesialDistalBuccalLingualOcclusal
9 Mandibular movements Vertical movement Opening Closing Horizontal movementProtrusive or forwardRetrusive or BackwardRight lateralLeft lateral
10 All these movements together will anable mastication
11 Occlusion -What is occlusion? Occlude means ‘to close’
12 Any contact between the incising or masticatory surfaces of the maxillary and mandibular teeth’ is termed as occlusion
13 Occlusal Plane -Average plane established by incisal and occlusal surfaces of the teeth
14 Curve of spee – seen in Natural dentition. Anatomic curvature of occlusal surfaces of teeth beginning at the tip of the lower canine and following the buccal cusps of the premolars and the molars, continuing to the anterior border of the Ramus,
15 Curve of Wilson:It is the mediolateral curve that contacts the buccal and lingual cusp tips on each side of the arch. It results from the inward incination of the posterior teeth ( mandibular molars ), making the lingual cusps lower than the buccal cusps.
16 Centric Occlusion – the occlusion the patient makes when they fit their teeth together in maximum intercuspation - A cusp to fossa relation.
17 The masticatory (or stomatognathic) system is generally considered to be made up of three parts: the Teeth, the Periodontal Tissues, and the Articulatory System.
18 Key of occlusion First key, Molar inter-arch relationship, the upper first molar's mesio-buccal cusp should essentially occlude into the buccal groove, of the lower first molar.The first upper molar's mesio-palatal cusp must occlude into the central fossa of lower first molar
19 Second keyThe mesial slope of the maxillary canine is in line with the distal slope of the mandibular canine.
21 When the maxillary and mandibular teeth contact simultaneously the condylar proceses are fully seated in the mandibular fossae
22 Maxillary and mandibular teeth should contact evenly to allow optimum function,To minimize trauma to the supporting structures, andTo allow an even load distribution throughout the dentition.
23 Occlusal interferences Interferences are undesirable occlusal contacts that may produce mandibular deviation during closure to maximum intercuspation.
24 When there is occlusal interferences there is trauma which cause tissue changes in periodontal ligament space
25 Centric relationCentric relation is defined as the maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective diskswith the condyles in the anterosuperior position against the shapes of the articular eminences.This position is independent of tooth contact.
26 The masticatory movements takesplace with in the following movements During masticationThe masticatory movements takesplace with in the following movements
27 Mandibular movements seen are OpeningClosingProtrusive or forwardRetrusive or BackwardRight lateralLeft lateralAll these movements together will anable masticationi.e. it is with in these movements that the masticatory movements take place.
28 Types of condylar Movements During opening or closing of the mandible Rotational movementTranslational movement
29 Around the horizontal axis (hinge axis) Rotational MovementAround the horizontal axis (hinge axis)Opening of the jaw