EVALUATION OF MARGINAL BONE LOSS OF TWO IMMEDIATELY LOADED IMPLANTS RETAINING MANDIBULAR OVERDENTURES WITH BALL ATTACHMENT VERSUS INTRA ORAL WELDING TITANIUM BAR A RANDOMIZED CLINICAL TRIAL
Study Details
Study Description
Brief Summary
It is a randomized control clinical trial in which maxillary and mandibular dentures will be constructed, two implants will be inserted in the inter foraminal region in the edentulous mandible and immediate loading will be done. We will be comparing peri-implant marginal bone loss of two immediately loaded implants retaining mandibular overdentures with ball attachment versus intra oral welding titanium bar. Patient satisfaction will be assessed using oral health related quality of life.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
The patients will be divided in two groups, each group will receive maxillary and mandibular conventional heat cured acrylic resin complete dentures, which will be duplicated and provided by radio-opaque resin at the proposed implant sites to act as radiographic stents. Only patients with a D2 or D3 bone density will be included in the study. This will be confirmed by their cone beam computed tomographic (CBCT) scans of the mandible, while wearing radiographic stents.
The CBCT will be used to ensure sufficient bone width at the proposed implant sites, namely canine regions for implant diameter 3.7. Diagnostic set ups for all patients will be prepared to ensure a crown height space of at least 12 mm to accommodate the ball attachments for group I and intra oral welding bar for group II. Each group will receive two implants in the canine region through using surgical stent and immediate loading will be done.
Group B: immediate loading will be done using ball attachment and soft liners acting as female part for mandibular overdenture.
Group I: immediate loading will be done using intra oral welding titanium bar with 2 mm diameter and soft liner acting as a female part for mandibular overdenture.
For each group, marginal bone loss around the implants will be assessed at time of denture delivery and six months later. Marginal bone loss, mesial and distal to the implants, will be measured on standardized digital periapical radiographic images obtained by radiographing them using long cone paralleling technique, a customized radiographic template.
The marginal bone loss outcome by using radiographic subtraction analysis in which two lines will be drawn extending from the top of the ball attachment till the marginal bone mesial and distal to the implant. The lines ran parallel to the long axis of the implant. Vertical bone loss will be calculated by subtracting the bone heights in the baseline radiographs from those in the follow-up visits in mm.
Study population
Patients' selection:
Fifty four edentulous patients will be selected from the out-patient clinic of Removable prosthodontics department, Faculty of Dentistry, Ain Shams University. This research will be reviewed by the research ethics committee faculty of dentistry Ain Shams University.
Inclusion criteria:
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Patients' age ranges from 40 to 65 years old.
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Good oral hygiene is mandatory.
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Patients should be medically free form any disease that could interfere with implant placement.
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Sufficient inter arch space to accept implant supported over denture as diagnosed from mounting the diagnostic casts.
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Firm and healthy mucosa covering the alveolar ridge.
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Minimum bone width 5.5 mm buccolingually and of 12 mm bone height as diagnosed from the pre-operative cone beam CT- scan.
Exclusion criteria:
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Heavy smokers.
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Patients with para functional habits.
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TMJ disorders
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Uncontrolled diabetic patients.
Patients' approval:
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All patients will be informed in details about the nature of the investigation and the aim of the study. When they will agree to take part in the study, they will sign on an informed consent form.
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All participants will be given notice about their privacy practices, their legal duties and their rights.
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In case of implant treatment failure, the patients will receive a new well- fitting denture.
Study procedure
Patients' history:
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Medical history: patients will be asked about their medical and dental history through a direct interview and a detailed questionnaire sheet.
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Dental history: patients will be asked about the cause, the date of teeth extraction and if there is any previous experience with any prosthetic appliance, any problems with TMJ will also be recorded.
Patients' examination:
- Extra oral examination:
It will be carried-out to detect any facial abnormalities, signs of inflammation and TMJ disorders as pain, clicking and limited mouth opening as well as maximum opening.
- Intra-oral examination:
Visual examination of the denture bearing area with no flabby tissues, mucous membrane of the cheeks, lips, palate and tongue. They will be checked for no ulceration or signs of inflammation also exclude bony protuberance presence.
Radiographic evaluation and surgical guide construction:
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A panoramic x-ray of the patients preoperatively to determine if the patient is indicated for implant placement.
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Complete denture fabrication for each patient and duplication of the lower one using barium sulphate acrylic resin material to obtain radio opaque stent appliance
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A cone beam computed tomography (CBCT) scan of the patients wearing radiographic stent to evaluate the bone height, width, and density in the canine region.
Randomization and allocation concealment:
Patients will be randomly allocated to both treatment groups using simple randomization. The method requires the preparation of twelve opaque sealed envelopes, 6 containing the letter "B" and 6 the letter "T" to represent ball attachment and the bar attachment groups respectively.
Patients will be selected according to inclusion and exclusion criteria.
Surgical procedures:
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infiltration anesthesia will be given bilaterally in the canine regions and a crestal incision will be attempted, extending from canine premolar area of one side to that of the other side with bilateral small vertical releasing incisions. This will be done in both groups
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The flap will then be elevated and reflected using a periosteal elevator. The canine areas will be identified by the aid of the surgical guide, which is actually the modified radiographic stent.
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Drilling will be continued then Implants will be first hand threaded and then threaded using the torque wrench and hex tool 1.25. A minimum insertion torque of 30 Ncm is required to allow for immediate loading.
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Once the implant platform will be flushed with the crestal bone, ball abutment will be attached to the implant for group I and abutment for group II then intraoral welding will be done for titanium bar with 2 mm diameter for group II.
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The flap will be sutured using interrupted suturing technique.
Prosthetic insertion
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The mandibular denture will be prepared for the relining procedures by creating sufficient space in the fitting surface of the denture opposite to the attachments.
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Mollosil liner (long term condensation silicone based soft liner, DETAX GmbH & Co. KG, Germany) will be used to act as the female receptacle of the ball attachments in group I and intra oral welding titanium bar for group II
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A small mix of the liner will be prepared and applied to the relevant areas and the patient will be asked to close in centric relation. The denture will then be left intra-orally, while the patient maintained centric relation until the liner set. Excess liner will be trimmed using hot wax knife and the denture will be polished and delivered to the patient.
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Patients will be given the following post-insertion instructions; In the first 72 hours it will be recommended to remove the denture only during oral and denture hygiene procedures. Strict oral hygiene measures should be followed by the patients.
Radiographic assessment
For each patient, marginal bone loss around the implants will be assessed at time of denture delivery and six months later. Marginal bone loss, mesial and distal to the implants, will be measured on standardized digital periapical radiographic images obtained by radiographing them using long cone paralleling technique, a customized radiographic template. Two lines will be drawn extending from the top of the ball attachment till the marginal bone mesial and distal to the implant. The lines ran parallel to the long axis of the implant. Vertical bone loss will be calculated by subtracting the bone heights in the baseline radiographs from those in the follow-up visits.
Patient satisfaction will be assessed using oral health related quality of life using (OHRQOL 14) .
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Placebo Comparator: mplant supported overdenture by ball attachment immediate loaded implant supported overdenture by ball attachment |
Procedure: implant supported overdenture by ball
overdenture supported by two implant with ball attachment
|
| Active Comparator: implant supported overdenture by bar immediate loaded implant supported overdenture by intraoral welding titanium bar splinted two implant |
Procedure: implant supported overdenture by bar
overdenture supported by two implant splinted by intraoral welding titanuim bar
|
Outcome Measures
Primary Outcome Measures
- crestal bone loss [6 months]
crestal bone loss will be measured by radiographic cone paralling technique
Secondary Outcome Measures
- patient satisfaction [6 months]
patient satisfaction will be measured by oral health of quality of life questionnaire
Eligibility Criteria
Criteria
Inclusion Criteria:
- good oral hygiene- patient will be medically free- sufficient inter arch space-
Exclusion Criteria:
- heavy smoker- TMJ disorders- uncontrolled diabetes- flappy tissue
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Faculty of Dentistry Ain Shams University | Cairo | Egypt | 11361 |
Sponsors and Collaborators
- Ain Shams University
Investigators
- Principal Investigator: Ahmed MA Mohamed, BDS MSc MD, Ain Shams University
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- FDASU-RecID032118