Clinical Trial Details
— Status: Not yet recruiting
Administrative data
| NCT number |
NCT04718454 |
| Other study ID # |
equator implant attachment |
| Secondary ID |
|
| Status |
Not yet recruiting |
| Phase |
|
| First received |
|
| Last updated |
|
| Start date |
February 1, 2021 |
| Est. completion date |
August 1, 2021 |
Study information
| Verified date |
January 2021 |
| Source |
Cairo University |
| Contact |
Doaa A Heshmat, lecturer |
| Phone |
01006455491 |
| Email |
doaa.heshmat[@]dentistry.cu.edu.eg |
| Is FDA regulated |
No |
| Health authority |
|
| Study type |
Observational
|
Clinical Trial Summary
This research aimed to evaluate the retentive power and wear of the smart box attachment use
with tilted two implant assisted mandibular overdenture
Description:
Implant supported overdenture can provide better mastication force than complete denture but
less than the normal teeth . Most of the patient reported that implant supported overdenture
has many superior features over the conventional complete denture in stability and retention
Key factors related to successful treatment with overdentures include the number, location,
and distribution of implants and choice of abutment. While the use of parallel implants that
are widely distributed is generally desirable for optimal treatment, patients often present
with challenging anatomical features, insufficient bone volume in all dimensions, and/or
critical anatomy that precludes ideal placement of dental implants. Some clinicians may
consider the ideal placement of implants for overdentures as parallel to each other and
perpendicular to the occlusal plane of the denture Anatomical features associated with
mandibular or maxillary edentulous ridges can range from straight or rounded to irregular and
sharp ridges, and variability in bone width may limit potential implant sites for
overdentures. Factors such as narrow bone volume, the inferior alveolar nerve being anterior
or superior positioned, extensive bony undercuts, the inferior portion of the maxillary
sinus, proximity to high-risk vascular structures, or a patient's desire to avoid additional
surgical procedures may prompt a clinician to angulate a dental implant, which could result
in the positioning of implants in non-ideal configurations.
Excessive angulation, increased maintenance and wear of inserts, and difficulty maintaining
hygiene. Increased angulation may result in greater challenges to inserting and removing the
prosthesis, which can become difficult for patients who are older and/or have limited
dexterity. This challenge also can make it hard for patients to properly clean the inside of
the retentive portion of the stud-style abutment and may increase wear of the retentive
inserts Resilient Ball attachment most commonly used Ball attachment the simplest of all stud
attachments which widely used because it is practical, effective, relatively low cost, less
technique sensitive, ease of handling, minimal chair side time requirements and their
possible applications with both root and implant-supported prostheses so it is used with
non-splinted implants in clinical studies, it has been shown that changes in the retention of
the prostheses occurred frequently. Both decrease and considerable increase in retention
occurred as a result of attachment abrasion and micro movements during the mastication
process The ball attachments showed only a few minor, easy manageable complications. Four out
of 36 attachments gave reason for treatment. Two matrices loosened out of the mandibular
denture and had to be fastened by adding acrylic resin after 1 and 4 weeks of loading. One
patrix part of the ball attachment unsettled after 2 days of loading and was refastened. One
ball attachment matrix lost its retention capacity and had to be reactivated after a period
of 2 weeks. All these complications occurred in subjects where the implants were not
perfectly parallel to each other positioned in the mandible. The loading conditions of these
attachments were therefore not as favorable as for more parallel inserted implants A lack of
parallelism of the implants creates considerable wear of the rubber rings in a relatively
short time span.
Rhein 83, Italy, also has developed Smart Box, which could be used with the OT Equator in
patients of extreme divergencies among the implants. The Smart Box has an inner tilting
mechanism that enables a passive insertion with divergent implants up to 50 degrees(159).
