Objectives: The aim of this study was to evaluate the effect of two different attachment systems on the retention and implant stability of implant-retained mandibular overdenture.
Materials and methods: Fourteen completely edentulous patients with age ranged from 47 to 65 years planned to receive conventional complete denture. Following the treatment protocol, each patient received two implants in the mandibular anterior region and after insurance of the osseointegration, the patients were randomly divided into two groups; group a received ball /O-Ring attachment and group b received locator attachment. The retention of two groups was assessed by the digital forcemeter at three times (T); (T0) retention of the conventional complete denture, (T1) at time of insertion of implant retained mandibular overdenture and (T3) retention after three months of insertion of implant retained mandibular overdenture. The implant stability quotient (ISQ) was done using magnetic resonance frequency analyzer (Osstell, ISQ) at the time of loading then after 3 and 6 months.
Results: The retention values before the insertion of overdenture (T0) were considerably low in comparison with those at time of insertion of overdenture (T1) and after three months from denture insertion (T3). Regarding the ISQ values, there was no significant difference between the two groups before and at the time of insertion of the implant while there was a significant difference between the two groups with better stability results in the locator attachment group after three months (p <0.05).
Conclusion: Within the limitation of this study, both types of attachment systems; ball / O-ring and locator attachments, are reliable modalities for improving the retention and stability of implant retained mandibular overdenture with superior initial stability results for the locator attachment.
Siddhanth S Jain,
Rakesh B Shah,
Monika P Surana,
Amit D Mahajan,
Prachur K Malhotra
How to cite this article:
Jain SS, Shah RB, Surana MP, Mahajan AD, Malhotra PK. Evaluation of Patients’ Perspectives on Dental Implants and Bone Graft Surgery: A Questionnaire-based Study. Int J Prosthodont Restor Dent 2019; 9 (1):9-12.
Aim: To evaluate patients’ knowledge and awareness regarding dental implant therapy and bone graft surgeries, various implant techniques; their willingness towards implant surgery and bone-grafting surgeries.
Materials and methods: One hundred sixty patients were included and a pre-typed questionnaire was given to the patients, written in their language and their answers were documented and analyzed.
Result: A total of 160 patients were included. One hundred ten were males and 50 were females. Fifty-six patients were between 20–25 years of age, 67 patients were between 25–35 years of age and 37 patients were between 35-50 years of age. One hundred twenty-nine patients underwent extraction, 140 patients had missing teeth, 81 patients had periodontal disease, 142 patients were willing for replacement, 113 patients wanted fixed prosthesis, and 95 patients did not know about dental implants. Out of the 65 patients who knew, their source was dentists. One hundred nine patients perceived implants as being costly. One hundred forty-nine patients did not know about bone loss post extraction. Only seven patients knew about bone augmentation surgeries. Eighty-eight patients agreed that good quality bone could significantly improve the treatment outcome. One hundred eight patients wanted more information; however, only 17 patients agreed for implant therapy. Majority of the patients (107) considered financial costs to be the reason to not undergo implant therapy.
Conclusion: This study concluded that patients’ knowledge and attitude towards implants was below average as an option for replacing missing teeth. Dentists were the main sources of information. The lack of information about good healthy bone was found to be significant in our group. However, once explained about the various treatment options, their willingness improved significantly. The high treatment cost was a major factor against the willingness of patients and they were reluctant for dental implants. Thus, constructive improvements towards making this treatment modality more affordable and creating more awareness are required.
Purpose: The purpose of this study was to compare the total occlusal convergence angles of crown prepared teeth with low-power magnifying dental loupes and without dental loupes.
Materials and methods: Three different typodent maxillary teeth (incisor, premolar, and molar) were prepared with x2.5 dental loupes and other prepared without dental loupes. A total of 96 were made, 48 with dental loupes, 48 without dental loupes. Teeth were admitted for evaluation of the buccolingual and mesiodistal convergence angles of each prepared tooth with AutoCAD digital software.
Results: The average buccolingual and mesiodistal total convergence angles for crown-prepared central incisors with dental loupes were 14.73 degrees and 14.94 degrees without dental loupes. In premolars were 16.18 degrees with dental loupes and 17.74 without dental loupes. In molars were 18.55 degrees with dental loupes and 19.18 without dental loupes.
Conclusion: There is no statistically significant difference between crown-prepared teeth with 2.5X dental loupes and other crown-prepared teeth without dental loupes.
Pratik D Acharya,
Rupal J Shah,
Sejal A Mehta,
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Acharya PD, Shah RJ, Mehta SA, Solanki D. Effect of Surface Conditioning Methods on Shear Bond Strength of Resin Luting Cement to All-ceramic Coping Material: An In Vitro Study. Int J Prosthodont Restor Dent 2019; 9 (1):18-24.
Aim: To study the effect of various surface conditioning methods on shear bond strength of resin luting cement to all ceramic (zirconia) coping materials.
Materials and methods: Thirty-two caries-free human mandibular 3rd molars were embedded in acrylic blocks and 32 zirconia blocks of 5 x 5 x 5 mm dimension fabricated. Amongst them eight zirconia blocks were used without any surface treatment, eight were etched with 9% hydrofluoric acid, 8 were air abraded with 150 microns alumina sand particles, with rest eight both acid etching and air abrasion surface treatments were done. All zirconia blocks were luted with dual-cure resin cement to conditioned dentin surface of acrylic embedded mandibular 3rd molars. Shear bond strength of resin cement was evaluated with the help of instron universal testing machine.
Results: The mean shear bond strength of cemented air-abraded zirconia ceramics to dentine with dual-cure resin cement (ivoclair) exhibited the highest bond strength of 19.44 MPa with a standard error of 1.13. The mean shear bond strength of zirconia ceramics with acid etched plus air abrasion surface treatment luted to dentine with dual-cure resin cement (ivoclair) exhibited bond strength of 13.20 MPa with a standard error of 0.78. The mean shear bond strength of zirconia ceramics with acid etched surface treatment, luted to dentine with dual-cure resin cement (ivoclair) exhibited bond strength of 10.91 MPa with a standard error of 0.57. The mean shear bond strength of zirconia ceramics without any surface treatment luted to dentine with dual-cure resin cement (ivoclair) exhibited bond strength of 10.49 MPa with a standard error of 0.56.
Conclusion: Zirconia blocks with air abrasion shows the highest shear strength followed by acid etched plus air abrasion followed by only acid etching with 9% hydrofluoric acid.
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Thakur A, Chauhan D, Yadav R. Prosthetic Rehabilitation of Velopharyngeal Insufficiency with Pharyngeal Obturator Prosthesis: A Case Report. Int J Prosthodont Restor Dent 2019; 9 (1):24-28.
Soft palate is a part of the palate composed of muscles and mucous membrane. It divides oropharynx from the nasopharynx. Soft palate along with lateral and posterior pharyngeal walls create a three-dimensional muscular valve which is known as velopharyngeal (VP) sphincter. This VP sphincter allows normal breathing and prevents regurgitation of food and fluids in the nasal cavity. It is also required in other functions such as swallowing, blowing, sucking, whistling and sneezing. Any defect in the soft palate, i.e., structurally or neurologically will lead to VP defect due to which normal functions were impaired. Pharyngeal obturator prosthesis restores the congenital and acquired defects of the soft palate and allows adequate closure of palatopharyngeal sphincter. In the present case report, a male patient suffering from pleomorphic adenoma of the soft palate was operated leading to VP insufficiency. This patient was rehabilitated by pharyngeal obturator prosthesis for the improvement of quality of life of the patient.
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Jurado CA, Wu WC. A Technique for Reestablishing CR Position and Vertical Dimension of Occlusion during the Conversion of an Interim Fixed Prosthesis. Int J Prosthodont Restor Dent 2019; 9 (1):29-31.
Placing immediate complete dentures after extractions may present some challenges, and one of them could be related to altering the ideal CR position and vertical dimension of occlusion due to inadequate reline procedure. This type of prosthesis often need relining of the intaglio surface due to inadequate denture fabrication, inadequate fit, or to help the tissue heal with some tissue conditioner. Before performing the conversion of a removable prosthesis to interim fixed implant prosthesis, the dentures need to have an ideal CR position and vertical dimension of occlusion. This technique describes a method to restore an incorrect position of the interim prosthesis during the same conversion procedure. Following this technique, the prostheses will interdigitate following the ideal arrangement when they were fabricated.