Purpose: This in vitro study was to investigate the accuracy of two kinds of impression techniques (open and closed tray) with three impression materials (polyvinylsiloxane [PVS]/polyether [PE]/vinylsiloxanether [VSE]) on angulated implants. Materials and Methods: The reference model was a stainless steel die with six analogs placed at 0°, 10°, and 20° toward the center axis. Custom acrylic trays were made on a stone model replica of the reference die. A total of sixty samples of twenty each were made under each type of impression material. Each group was divided into open and closed tray groups. Two types of splinting were carried out in the open tray: Group 1 - with floss and pattern resin and Group 2 - with a plastic rod (coffee stirrer) and resin. Impressions were poured with Type IV stone to obtain experimental casts and were evaluated for positional accuracy by coordinate measuring machine in three dimensions (X, Y, and Z). Differences in measurements were analyzed using analysis of variance and Tukey's test. Results: The lowest mean deviation was found in casts made from open tray splinted with floss and resin. There was also a significant difference in the measurements of PVS, PE, and VSE. Conclusion: VSE impression material yielded more accurate casts than those of PVS and PE. Splinting with floss and pattern resin was found to be more accurate than stirrer and resin.

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Dentitions damaged by periodontal disease and dental caries often cause problems to the patients and to the dentists, at least regarding the choice of therapy. A recent trend in the replacement of missing teeth is by dental implant. The role of various factors that would affect the prognosis of dental implants should be carefully considered before attempting to rehabilitate the patients with implants. Prognosis is a prediction of probable course, duration, and outcome of a specific disease based on a general knowledge of the pathogenesis of the disease and presence of risk factors for the disease. Factors that could determine the prognosis of implants are (1) periodontally compromised patients, (2) age, (3) bone density, (4) occlusion, (5) smoking, (6) genetics, (7) systemic diseases, (8) microorganisms, (9) antibiotics, and (10) type of implants.

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One of the most challenging and demanding maxillofacial endeavours is the construction of functional dental prosthesis for an edentulous patient who has undergone a mandibular resection. A hemimandibulectomy can have many debilitating consequences such as eccentric occlusion, a disoriented masticatory cycle, facial disfigurement, distorted speech and salivation problems. There are many treatment options for restoring the defect like guiding flange prosthesis, conventional acrylic removable partial prosthesis, cast partial dental prosthesis etc; implants today are a better treatment option as it provides good retention, stability and support for a prosthesis. This case report presents the management of the Hemimandibulectomy patient with implant retained overdenture.

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Introduction: Marketing of implants stored in different media other than air could improve implant wettability resulting in a favorable implant bone interface with subsequent optimized early osseointegration. The effect that the different storage media, such as saline, air and argon, have on the early osseointegration of plasma treated, titanium dental implants was investigated and was compared to conventional implants stored in air, in an ovine pelvis model. 96 implants were inserted in the iliac crests of four sheep and tested for osseointegration by comparing insertion torque values and removal torque values at 4 and 6 weeks postinsertion. Twelve implants were inserted in each ovine iliac crest (24 per sheep representing six implants from each experimental group). Saline demonstrated the highest increase in torque values with argon demonstrating a linear decrease. The average percentage gain for each of the storage media at 4 weeks were plasma/air = +2%, plasma/saline = +30.4%, air = +9.6% and plasma/argon = −30.4%. The results were only statistically significant for the saline group at 4 weeks and the argon group at 2 weeks. All storage media demonstrated an initial decrease in torque value of 14.25% at 2 weeks before a strong rise in torque value could be observed. Saline as a storage media has great potential for improving early osseointegration. An interesting observation made was that the majority of the dental implants tend to demonstrate an initial decrease in osseointegration before demonstrating a strong rise in torque values. Further studies are recommended for the periods of 6 and 8 weeks after implant placement. Context: Research protocol. Aims: The purpose of the study was to compare the early osseointegration potential of plasma-enhanced implants stored in different storage mediums, to conventional implant stored in air. Settings and Design: The experiment consisted out of a comparative in vivo pilot study in which the early osseointegration potential of implants stored in four different storage media was compared. These implants were inserted in the iliac crest of four sheep, and the degree of osseointegration of the different groups was compared at 2 and 4 weeks after insertion. The osseointegration potential of the implants was evaluated by measuring and documenting the insertion torque and comparing it to the removal torque values of each implant. Subjects and Methods: A total of 96 (n = 96) dental implants (3.75 mm in diameter and 10 mm in length), including 24 plasma-enhanced dental implants stored in air; 24 plasma-enhanced dental implants stored in argon; 24 plasma-enhanced dental implants stored in saline and 24 conventional dental implants stored in air; were inserted into the iliac crests of 4 sheep. The insertion torque values were measured and documented on insertion. Two sheep were euthanized after a period of 2 weeks postinsertion, and the maximum removal torque value of each implant was measured and documented. The remaining two sheep were euthanized at 4 weeks postinsertion and the maximum removal torque of each implant measured and documented. The torque values measured on insertion, after 2 weeks, and after 4 weeks postinsertion were then compared and used to determine the level of osseointegration as well as the potential for further osseointegration. Statistical Analysis Used: Comparative graphical analysis was performed. Significance was determinant at P < 0.05. Results: Saline demonstrated the highest increase in torque values with argon demonstrating a linear decrease. The average percentage gain for each of the storage media at 4 weeks were plasma/air = +2%, plasma/saline = +30.4%, air= +9.6%, and plasma/argon = −30.4%. The results were only statistically significant for the saline group at 4 weeks and the air group at 2 weeks. All storage media demonstrated an initial decrease in torque value of 14.25% at 2 weeks before a strong rise in torque value could be observed. Conclusion: Saline as a storage media has great potential for improving early osseointegration. The majority of the dental implants tend to demonstrate an initial decrease in osseointegration before demonstrating a strong rise in torque values. Further studies are recommended for periods of 6 and 8 weeks after implant placement.

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Background: Immediate implantation was suggested to reduce the number of surgical interventions and to preserve the alveolar ridge. Implant placement demands a thorough understanding of anatomic, biologic, surgical, and prosthetic principles. Purpose: The aim of the present study was to evaluate the 18 months survival rate of osseointegration, on the basis of clinical and radiographic examinations, for simultaneous bone grafting with immediate implants supporting partial denture with locator attachment in the maxillary esthetic area. Materials and Methods: A total of twenty patients randomly assigned received 45 immediate implants with bone graft supporting maxillary partial overdentures. The clinical analysis of probing depth, bleeding index, plaque index, and radiographic analysis of crestal bone level at a follow-up interval of 6, 12, and 18 months was evaluated. Results: All implants achieved successful osseointegration. The soft tissue architecture remained stable throughout the healing period of the implants as well as after final prostheses delivery, contributing to esthetically pleasing and biologically sound results. Conclusions: Immediate implants with locator attachment supporting maxillary partial denture can be safe, reliable, and a predictable option for the replacement of teeth in the anterior maxillary zone, providing stability to the peri-implant soft tissue.

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Aim: This study was conducted to evaluate the impact of two different attachment systems on a single implant-retained mandibular overdenture on the oral health-related quality of life of completely edentulous individuals. Materials and Methods: Twelve completely edentulous, first-time denture wearer patients were selected for the study. A set of new conventional complete dentures was fabricated for each patient. Each patient received a single mandibular symphyseal implant which was conventionally loaded with a ball or locator attachment using the cross-over study design. The Oral Health Impact Profile-49 questionnaire and sieve method were used to assess the masticatory performances at various intervals. Results: The paired samples test was used to evaluate the correlation between conventional complete dentures and implant-supported overdentures (ISOD) and the attachments within each group. The independent paired samples test was used to evaluate the correlation between each of the attachments. The results of this study were in favor of the ball attachment at the end of the 2-month period. Conclusion: Within the limitations of this short-term cross-over trial, it may be concluded that single implant-supported mandibular overdentures and a connecting ball attachment are a viable treatment option for the edentulous population with problematic mandibular dentures.

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Implant-supported overdentures offer many advantages over conventional complete dentures. Implant placement in the atrophic mandible is complicated as the available bone is insufficient. Different therapeutic options have been proposed, most being more complicated and expensive. Nerve repositioning is an excellent alternative to augmentation procedures. ^[1] But it is relatively difficult, and has a huge risk of inferior alveolar nerve (IAN) damage. This report presents a case of mandibular atrophy in which the IAN repositioning was successfully performed, and the prosthodontic rehabilitation completed with implant placement and fabrication of an implant retained overdenture.

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