/yt1 0 Table 2: Records used to register the static and dynamic occlusion. The joint is also composed of ligaments such as, the stylomandibular and temporomandibular ligament. /Rotate 0 Therefore, it is the position of maximum stability, of the mandible. >> endobj During lateral excursion movement, the, non-working condyle moves downward, inward and forward. >> /u2pMat [1 0 0 -1 0 841.89] This paper was accepted for publication in Dental Update. Fundamentals of occlusion and restorative dentistry - Free download as PDF File (.pdf), Text File (.txt) or read online for free. /TrimBox [0 0 595.276 841.89] mandible is not moving. Abdulhadi Warreth, Division of Restorative Dentistry and Periodontology, Dublin Dental University Hospital, Trinity College, Dublin 2. /xb1 0 As a result, dental personnel should be able to recognize these complications and the factors that have negative effects on the success of such implant-supported restorations or prostheses. << Therefore, restorative treatment should be aimed at the achievement of, smooth unhindered mandibular movements during function. Canine teeth are suitable to guide the mandible during its excursive movement, for many reasons, as previously mentioned. /MediaBox [0 0 595.276 841.89] /yb1 0 /xt2 595.276 The THA is an imaginary axis, which passes through the two condyles. Two mandibular positions are important from a restorative point of view, i.e.. maximum intercuspal position (MIP) and CR. It is restricted to a purely, recordable and reproducible in patients with no pain or derangement in the, when the MIP is not satisfactory, or when occlusal rehabilitation is needed, In order to record the CR clinically, several methods are used. /MediaBox [0 0 595.276 841.89] Therefore, a basic knowledge of dental implants is necessary for every dental student, hygienist and dentist. >> If there is a bodily shift, there will be a downwards, forwards or medial component. /yb2 841.89 1993 Jul;37(3):341-51. /Filter /FlateDecode /Type /Page /TrimBox [0 0 595.276 841.89] << 17 0 obj endobj /TrimBox [0 0 595.276 841.89] This makes the identification of the MIP possible. FIGURE 5: Movements of the lower incisors when viewed in the sagittal, FIGURE 6: Schematic (A) and clinical pictures (B and C) represent the mandible, when it is at the first tooth contact position (B) and when the mandible is, pushed into the MIP (C). The transitional arc is represented by a dashed line in, upward and protrusive direction (blue arc in, make contact with the upper teeth, this arc of movement is known as a, protrusive arc. These rotational movements occur in the lower joint compartment. This second part of the two-part article discusses different types of occlusal contacts and their interferences. /X10 18 0 R The posterior band of the disc is attached to two layers: a superior (elastic); and, an inferior (inelastic) layer. /F7 25 0 R As a result, dental personnel should be able to recognize these complications and the factors that have negative effects on the success of such implant-supported restorations or prostheses. /G3 14 0 R Fundamentals of occlusion and restorative dentistry: I. basic principles. They should be accurate enough to record, sufficient details that enable the cast to be oriented correctly. /Parent 3 0 R /yt2 841.89 The tooth contact in this position is known as first tooth, contact (FTC) or slide or retruded contact (RC) (, guides the mandible along the deflective path (black slope in, horizontal components, and is typically less than 1mm in the, anteroposterior direction. However, in a patient with an anterior open bite, the, influence of anterior teeth is lost and the posterior teeth may guide the, mandible during the lateral excursions and protrusive movements. /Rotate 0 /yt1 0 axis. (vertical and horizontal overlap of anterior teeth). Interested in research on Restorative Dentistry? >> /Parent 3 0 R /MediaBox [0 0 595.276 841.89] The outcome, should not result in an occlusal interference, nor should it lead to generation of, excessive force on the teeth, the periodontal apparatus or the, should work in harmony and accommodate the changes in occlusal morphology. The CR is actually not a mandibular position but, an axis around which the mandible can rotate. /yt2 841.89 Therefore, clinical examination, which consists of examination of the TMJ, teeth and soft tissue as well as the periodontium, should be carried out before, commencement of dental treatment. << cusp angles of posterior teeth are influenced by the relationship between the, occlusal plane and the articular guidance. /MediaBox [0 0 595.276 841.89] Warreth A, Ramadan M, Bajilan MR, Ibieyou N, El-Swiah J, Elemam RF. /yt2 841.89 /X15 21 0 R Functional Occlusion in Restorative Dentistry and Prosthodontics provides a full-color, comprehensive guide to occlusion, with coverage … %PDF-1.4 When the, mandible moves from the MIP to an edge-to-edge relationship, their path is, determined by the palatal surfaces of the maxillary anterior teeth (, relationship. /Contents 48 0 R FIGURE 15: The canine guidance occlusion. The ten chapters … 14 0 obj 16 0 obj While the working condyle rotates around the vertical axis during mandibular, lateral excursion, it may also move laterally as well as backwards, upwards and, the mandible in which the non-working condyle moves is straight and medial, side shift describes a lateral translation of the mandible towards the working, side in which the non-working condyle moves medially before its forward, movement occurs. The length of the radius of this curve has an effect on, the occlusal plane and on the cusp heights of posterior teeth. /BleedBox [0 0 595.276 841.89] >> /xt1 0 Clinical relevance: Restorative treatment outcome is highly dependent on the occlusion of the restoration when the, Fundamentals of occlusion and restorative dentistry. independent of tooth contact. /CropBox [0 0 595.276 841.89] The inferior layer is inelastic; therefore, it maintains a normal, relationship between the disc and the condyle. Therefore, a basic knowledge of dental implants is necessary for every dental student, hygienist and dentist. uuid:15b5e141-4b44-45fb-888c-ed68dd987021 /xb1 0 /X13 19 0 R /xb1 0 /yt1 0 The authors would like to thank Dr Rami Al Fodah, a postgraduate student at, the Dublin Dental University Hospital, for providing. 7 0 obj All these movements influence the occlusal morphology of the, Also, downward movements of the non-working condyle in relation to the, horizontal plane affect the occlusal morphology of posterior teeth, as the, greater the angle of the path, the greater the steepness of the cuspal angles, The anterior determinant indicates factors within dentition that influence the, occlusal morphology and the mandibular movements. /Height 320 When the radius, of the curve is long (less concave/less acute), the occlusal plane is flatter than. FIGURE 11: The long axis of each mandibular posterior tooth is aligned parallel to the arc of closure; therefore, maximum resistance to occlusal force is achieved. /yt2 841.89 cancellous bone. endstream For, example, when a maxillary palatal cusp is tilted so it becomes below the curve, of Wilson, a non-working side interference may be created and its correction is, necessary before restorative treatment can be carried out, as displayed in, mutually protected occlusion in which the vertical and horizontal overlap of the, canine teeth disengage the posterior teeth in the excursive movements of the, mandible. /yt1 0 A basic knowledge of dental implants is necessary for every dental student, hygienist and dentist. 10 0 obj /LJ 0 For example, an over-erupted tooth, after extraction of, opposing tooth/teeth, may lead to occlusal interferences and disturbance in, parallel to the arc of closure; therefore, maximum resistance to occlusal force. /xt2 595.276 /StructParents 0 Clinical relevance: A sound knowledge of dental occlusion is … /BleedBox [0 0 595.276 841.89] The red arrow indicates the FTC between the mesial, inclined of the disto-buccal cusp of the upper first molar and the distal incline, of the disto-buccal cusp of the lower first molar in the CR. disruption may be required before restorative interventions can be carried out. number of teeth are present. /yb1 0 /ca 1 << when measured between the upper and lower incisors. /xt1 0 This can be achieved by, customising the incisal guidance and copying the palatal surface of these teeth, in an impression from which the technician can transfer the palatal surface of, the teeth to the restorations, or by using a custom-made incisal guidance, This is defined as the average plane established by the incisal and occlusal. relationship, incisal guidance, MIP and FTC. /yt2 841.89 Functional Occlusion in Restorative Dentistry and Prosthodontics provides a full-color, comprehensive guide to occlusion, with coverage ranging from an explanation of biological principles to treatment … the articular eminences of the glenoid fossa to a point of maximum, opening. /Width 320 /SMask 74 0 R << /Type /Page FIGURE 9E: Incisal guidance. /F4 22 0 R It is about the different types of dental ceramics and how to select the appropriate one for specific dental situations. Curve of Spee. /yt1 0 This movement usually has both vertical and, ). /Kids [5 0 R 6 0 R 7 0 R 8 0 R 9 0 R 10 0 R 11 0 R 12 0 R 13 0 R] E: Warrethab@dental.tcd.ie Abstract This article presents the basic principles of dental occlusion << extraction of a causative tooth/teeth in severe cases. The, condyle of the working side is denoted as the working or rotating condyle, and. 46 0 R 47 0 R] establishment of a good dental occlusion when the treatment is completed. /Type /Page /BleedBox [0 0 595.276 841.89] Abdulhadi Warreth, Division of Restorative Dentistry and Periodontology, Dublin Dental University Hospital, Trinity College, Dublin 2. It should be, understood that the casts do not represent the actual picture of the mouth, as, some variations do exist. D: Incisal guidance. /BleedBox [0 0 595.276 841.89] endobj the superior head of the lateral pterygoid muscle into the disc was found. Part I: basic principles October 2015 Journal of the Irish Dental Association 61 (4):201-8 Authors: Abdulhadi Warreth Ajman … This article provides clarification of the basic principles of dental occlusion, as, well as an overview of this subject area, which is vital for every dental student, and dentist. /yb2 841.89 It results from inward inclination of the. Fundamentals of occlusion and restorative dentistry. However, as the number of patients who have dental implants is increasing, dental personnel are more. /Type /Pages Rotational mandibular movements are described around three imaginary axes: horizontal (also known as the terminal hinge axis; THA); vertical; and, sagittal. Thirdly, the mandible is a type III lever (like a, nut cracker); hence, the occlusal force on these teeth will be less than that, imposed on the posterior teeth. /yb1 0 >> /xb1 0 Furthermore, canines have a, favourable root anatomy and a lower crown–root ratio. /Parent 3 0 R /Resources 61 0 R usually slides on the upper tooth/teeth, which then bring the mandible, into the MIP. Several materials are used in registration of the static and dynamic occlusion. /Contents 60 0 R 4 0 obj These include, bimanual mandibular manipulation with or without a jig, chin point guidance, with or without a jig, and Gothic arch tracing. >> A number of implant-supported treatment options have been used successfully to replace a single tooth and multiple teeth, as well as a completely edentulous jaw. location of the curve will serve two important purposes: arc of closure; therefore, maximum resistance to occlusal force is, achieved, as most of the periodontal ligaments are involved in dissipation, b. 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Be displaced when the radius of this curve has an effect on dental implants is necessary for dental!, in which the mandible rotates around an imaginary orthodontic tooth intrusion, endodontic!
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