The maxilla, post-extraction of the teeth tends to consists of thin cortices and spongy cancellous compartments. The advanced resorption of alveolar bone combined with a poor quality of bone found in the posterior maxilla creates a situation which is not conducive to higher clinical success with dental implants. As a consequence of this, placement of short implants in poor quality bone is not advisable as shorter implants when placed in maxilla may take a longer time to heal and may not reciprocate the same way as in the mandible. Jemt and Lekholm et al. (1995) 107 reported a failure rate of 24% with implants of height ≤
The disappearance of the effect by curving the gridlines demonstrates the inapplicability of lateral inhibition to explain the overall effect as Geier et al. (2008) established that the net inhibition in their modified Hermann Grid was identical to that of the original, so the centre-and-surround antagonism would be expected to be virtually identical, i.e. the relationship between stimulus and receptive fields would have had to be unchanged to support the original hypothesis. A further problem revolves around Baumgartner’s claim that the assumed relationship between the stimulus and receptive fields will not change if the net antagonism remains the same. As shown by Schiller & Carvey (2005), and contrary to the ‘lateral inhibition’ theory, the illusory effect is not increased by enlarging the centre-and-surround antagonism of on-centre retinal ganglion cells.
Advantages of Immediate Dentures 1) The elementary advantage of the immediate dentures is the maintenance of a patients appearance due to the absences of edntoules period. 2) On the other hand, we can maintain the circumolar support, muscle tone, vertical dimension of occlusion, jaw relationship, and the face height. Tooth loss will not affect the tongue to spread out due to this event. 3) There may be less postoperative pain according to the protection of the extraction sites. Some another have augmented that whether immediate denture decrease residual ridge resorption.
The line is never the same at any point along its course, yet it never leaves the surface of cone. Adoption of a line resembling a segment of the line for tooth placement and base festooning adds greatly to the dynamism of a set up and strongly recommended as a substitute for the unchanging curve of the circle. Smile designing is done in dynamic unity. Anatomy of teeth, age, sex, personality factor festooning in denture base, dominance and various other factors aid in achieving smile design in dynamic unity. Principle of Dominance : According to the dominance principle, one factor has to dominate in each component of dental composition to achieve an esthetic smile.
The replacement of missing teeth with fixed partial dentures is largely dependent upon the health and stability of the surrounding periodontal tissues. The gingival tissues should exhibit scalloped margins, sulcus depth within the range of 1–3 mm and an adequate width of attached gingiva. The clinical performance of a crown is directly linked to its mechanical, esthetical, and biological properties. Cementation and marginal integrity play a key role in the long-term prognosis of the treatment. In fact, the marginal fit (MF) opening value has very important clinical significance.
These copings protect the abutment from dental caries and thermal irritations and also provide retention and stabilization of the secondary coping. The secondary coping engages the primary copings to form a telescopic unit and it provides retention and stability to the prosthesis.2,3 Telescopic dentures do not preclude the use of removable partial dentures where indicated. Selection is based on the nature of the support of denture-bearing areas and stability of remaining teeth. Through a combination of passive ridge support and full-coverage retainers placed on the remaining natural teeth, the telescopic denture is constructed.4-7 The teeth act as stabilizers and do not provide retention for the denture.The teeth prevent lateral displacement of the
The Gingival Sulcus The gingival sulcus is a V-shaped, shallow space between the free gingiva and the tooth surface. The base of the sulcus is formed by the junctional epithelium—a specialized type of epithelium that attaches to the tooth surface (Bosshardt, &Lang, 2005). The Attached Gingiva The attached gingiva continues from the cemento-enamel junction (CEJ) to the mucogingival junction and lies between the free gingiva and the alveolar mucosa. In health, the attached gingiva is pale or coral pink. In dark-skinned individuals, it may be pigmented.
How Partial Dentures Help Achieve Optimum Oral Health Missing teeth can have a big effect on the quality of life of any individual. Not only will the absence of teeth lead to difficulty in chewing and proper nutrition; it will also affect the way you speak and smile. How Teeth Affect the Quality of Life Beautiful teeth and a healthy smile are found highly attractive, both for men and women. People with attractive teeth are seen as more confident in their social lives, more fruitful in their romantic lives and more successful in their careers, most especially those who work in customer-facing scenarios. A study developed by Kelton Research yielded the following results: • A smile makes or breaks the first impression.
Introduction The success of rehabilitation of edentulous patients with complete denture depends on upon esthetics, comfort, and proper function. During the function, the masticatory forces act upon the denture-supporting area through the hard denture base. Unfortunately, the health of these supporting tissues may be adversely affected by high-stress concentration. Chronic denture soreness is the most common complication of denture wearing. These post-insertion problems occur more in patients suffering from diabetes, debilitating diseases, and geriatric population.
Grating stimulation method at initial time is valuable particularly in an isometropic amblyopic. But it is supplementary with occlusion but a vital method of amblyopic therapy. Unilateral amblyopia helps CSF function and visual acuity in children and adults due to strabismus isometropic with central fixation the pre age group were screen out in occlusion in therapy. All of them having CSF deficit the function can be characterized having peak value The maximal sentivity,smax and speatial frequency at which smax occurs ,frmax)calculated by single peak least square regression method.the relationship shows meaningful recovery of visual acquity and CSF .visual acquity improvement through occlusion therapy has a prognostic significance and showed relationship of recovery of visual acquity and csf during initial period with significant