Evaluation of the amount of bone loss on CAD/CAM(milled framework) support two implant Telescopic mandibular overdenture attachments by splinting and Non splinting of two different impression materials (Vinyl Polyether Silicone and additional silic | ||||
Minia Journal of Medical Research | ||||
Article 5, Volume 34, Issue 3, July 2023, Page 25-35 PDF (498.32 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/mjmr.2023.219198.1429 | ||||
View on SCiNiTO | ||||
Authors | ||||
Marco Fouad Khalil 1; Amr Mohamed Ismaiel1; Gehan Fekry Mohamed2 | ||||
1Department of Prosthodontic, Faculty of Dentistry, Minia University | ||||
2Department of Prosthodontic, Faculty of Dentistry, Minia University, V. president of sina university -kantara branch | ||||
Abstract | ||||
splinting of two implant will affect passivity of final prosthesis also effect of amount of marginal bone loss , new impression material of Vinyl polyether silicone can solve this problem due to its stiffness enough to support . The aim of this study was to evaluate the amount of bone loss on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture attachments by splinting and Non splinting of two different impression materials (Vinyl Polyether Silicone and additional silicone) 4 groups of this study prepared on two different impression material , each impression material divided into two group splinting and non-splinting : Group (I): Divided into two subgroups Group (I.A): 5 patient receive two implants with on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture attachments opposing maxillary complete denture with final impression technique made by Vinyl Polyether Silioxaine (VPES) with splinting technique. The bone loss evaluated from 0 to 12 months after loading | ||||
Highlights | ||||
Conclusion The marginal bone loss in the group of Vinyl Polyether Silioxaine (VPES) with splinting was the least compared to the other three groups (Vinyl Polyether Silioxaine (VPES) without splinting, polyvinyl silioxane with splinting Group) while the marginal bone loss in the group of polyvinyl silioxane without splinting was the greatest.
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Keywords | ||||
Implant; splinting; framework; millied; resorption | ||||
Full Text | ||||
Introduction Edentulism has a very detrimental effect on individuals . It has been observed to result in functional, psychological, and social limitations and affects the quality of life and general health.(1)
Edentulism is a challenging problem for the healthcare providers, for going of this problem as a literature review, main responsible factors for teeth loss Dental caries and periodontal diseases. (2) Negative impact of teeth loss will affect esthetics also functional activity, prosthetic rehabilitation is the best choice to solve this problems for restoring vertical dimension also esthetics and function, either treating traditionally by conventional complete den-tures or by implant supported prostheses. (3)
Retention, stability and support, improved by implant supported -overdentures which have many functions as two implant overdentures have been agreed to be the basic standard restorative solution for the edentulous mandible overcoming the problems associated with conventional dentures. (4)
Implant overdentures can be divided according to the type of retention systems to bar splinting or solitary attachments(5) Also the number, distribution, of implants and placement sits depending on many factors, which include the anatomical condition and the economic status of patients.
From the biomechanical view, overdenture prosthetic option considering the best restorative option as they allow for a proper physiological force distribution and gentle impact on the mucosa also residual ridge preservation. (6)
Excessive functional loads on implants, leads to crestal bone loss leading to implant faliure This may result from biomechanical response of implant to stress.(7)
Impressions is a critical part of the process of constructing a well-fitting prosthesis; it is imperative that it copies the exact topography of the recorded site and translates it accura-tely to its cast. To achieve this, the impression material must be both accurate and stable (8,9) Accuracy of impression plays an essential role in prosthesis-implant fit.(9) Although there are many studies comparing different impression materials and techniques, but there is still no consensus (10-14).
Materials and methods Twenty completely edentulous patients were selected from the outpatient clinic of the Prosthodontic department, Faculty of dentistry, Minia University according to the following inclusion criteria:
The following patients were excluded from the study:
Upper and lower Complete dentures were constructed for all patients, the lower denture was duplicated, radiographic markers inserted into canine region to be used as a radiographic stent and later as a surgical stent.
Each patient received two mandibular root form implants with standardized diameter of 3.5 mm. and 13mm length, placed at the canine region. then they were divided randomly into two main groups (I & II) and two subgroups (A & B): Group (I): Divided into two subgroups Group (I.A): 5 patient receive two implants with on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture attachments opposing maxillary complete denture with final impression technique made by Vinyl Polyether Silioxaine (VPES) with splinting technique. Group (I.B): 5 patient receive two implants with on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture attachments opposing maxi-llary complete denture with final impression technique made by polyvinyl silicone with splinting technique. Group (II): Divided into two subgroups Group (II.A): 5 patient receive two implants with on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture attachments opposing maxi-llary complete denture with final impression technique made by Vinyl Polyether Silioxaine (VPES) without splinting. Group (II.B): 5 patient receive two implants with on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture attachments opposing maxillary complete denture with final impression technique made by polyvinyl silicone without splinting. After ensuring Osseointegration the implants, its uncovered, multi-unit abutm-ents heights 1.2 were screwed in the implants hex (fig. 1) all patients recalled after seven days for primary impression making which poured to making a study model upon which a customized open tray technique. The digital images were analyzed to evaluate the level of marginal bone height mesial and distal to the implant. To btain an actual measurement the option calibration was used. The screen length of the implant was measured and calibrated to the actual length of the implant. The contact between the implant platform and the abutment base was selected as reference point. Results Discussion
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