Purpose:
The purpose of the study was to analyze and compare the stress distribution in the so-called All-on-Four concept where two anterior implants were placed parallel to each other and two posterior implants were tilted at 45° angle against the four parallelly placed implants within the interforaminal distance in an edentulous mandible.
Materials and Methods:
The three-dimensional finite element analysis models consisted of cancellous bone surrounded by the cortical bone, four dental implants positioned in two different designs – i.e., four parallelly placed implants (Model 1) and All-on-Four concept (Model 2) with hybrid superstructures comprising of a Hader bar. The vertical (60N, 130N, and 300N) and lateral (20N, 45N, and 100N) loading protocols were considered and von Mises stress values were determined.
Results:
On vertical and lateral loading, lower stress concentrations were observed in the peri-implant region in Model 2. However, there was higher stress concentration noticed on cortical, cancellous bone and bar attachment due to the tilting of implants in every condition.
Conclusion:
Within the limitations of the study, All-on-Four concept is an optimal and viable treatment option if executed accurately as it reduces the cantilever length, reduces stress concentrations in the peri-implant region, and is cost-effective.
Every human being aspires to look beautiful and will continue to do so even when the odds are against them as they get older. Nowadays almost every edentulous patient demands a lot on the esthetics front, at least with hope for having to overcome their sunken/hollow cheek, for that slight bit of joy having to reminisce their past, when they were young and beautiful. By the use of the maxillary cheek plumpers, some support can be provided to the cheek and thereby the esthetics as well, but having to do so will be at the cost of the discomfort which the patient endures due to its added weight. This article describes the combination of Hollow Denture along with Cheek Plumper techniques, to provide more comfort to the patients, while it being non-invasive & cost-effective for the benefit of all kinds of people, as it is within every person's rights to look wrinkleless & attractive. Clinical Implication: This technique enables the elderly and those with poor manual dexterity by completely removing any effort which needs to be put in as there is no need for attachments & enhancing the facial esthetics while remaining cost-effective. It is a quick non-invasive procedure to provide better esthetics to the discouraged/discomfiture patients, without causing much difficulty in usage on a day to day life.
Tumors involving the hard palate, maxillary sinus, or nasal cavity require maxillectomy based on the extent of the lesion. Lack of these boundaries affects the speech, esthetics, and masticatory function. Prosthetic rehabilitation of these defects can be done utilizing zygomatic implants. This present case describes the use of a zygomatic implant to retain a maxillary obturator in a 22-year-old male patient following partial maxillectomy (Brown’s Class 2b) due to odontogenic myxoma. A surgical obturator was secured in position subsequent to the implant placement. Following the healing period, an interim obturator using heat cure acrylic was fabricated. Mechanical retention for the definitive obturator was obtained through the ball attachment suspended from the multiunit abutment of the zygomatic implant. The case was followed up closely for a year to evaluate the function of the prosthesis. The prosthetic rehabilitation not only promoted esthetics and function but also improved the patient’s quality of life.
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