EVALUATION OF TWO DIFFERENT ATTACHMENT SYSTEMS IN MANDIBULAR OVERDENTURES RETAINED WITH TWO INCLINED IMPLANTS

NCT05695612 | Unknown

• 1 other identifier: IRB00010556-IORG0008839
• Study Type: interventional
• Target: 22
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of the study is to evaluate clinically and radiographically the Novaloc and Locator attachment systems in mandibular overdentures retained with two inclined implants.

Conditions

Inclined Implants

Outcome Measures

Primary Outcomes (5)

• Peri-implant Probing Depth (PD)

  The distance from the gingival margin till the point of least resistance will be measured using a graduated plastic autoclavable periodontal probe. The probe will be held parallel to the long axis of the implant and introduced with light force to the peri-implant sulcus. Measurements will be made at 6 sites around each implant; mesiobuccal, mid-buccal, disto-buccal, mesio-palatal, mid-palatal and disto-palatal. Probing depth of 1 mm or less will be recorded as 1 mm, and those exceeding 1 mm, but less than 2 mm, will be recorded as 2 mm, and so on. The mean for each implant will be calculated.

  up to 12 months

• Modified Sulcus Bleeding Index (BI)

  This will be measured using a graduated plastic autoclavable periodontal probe. The probe will be held parallel to the long axis of the implant and introduced with light force to the peri-implant sulcus. A score of 0-3 will be assigned to each labial and palatal surface of the implant then the average for each implant will be calculated according to the following criteria: Score 0: No bleeding when a periodontal probe is passed along the gingival margin adjacent to the implant. Score 1: Isolated bleeding spots visible. Score 2: Blood forms a confluent red line on margin. Score 3: Heavy or profuse bleeding

  up to 12 months

• Modified gingival index

  The peri-implant mucosal tissues will be assessed according to Lobene and Weatherford as follows: 0: Absence of inflammation, normal gingiva. 1. Mild inflammation, slight color change, little change in texture of any portion of, but not entire, marginal, or papillary gingival unit (localized). 2. Mild inflammation, slight color change, little change in texture involving the entire or papillary gingival unit (generalized).. 3. Moderate inflammation, redness, and edema. 4. Severe inflammation, marked redness, edema, ulceration, and spontaneous bleeding It will be measured at 4 sites around each implant (mesially, distally, labially/ buccaly, lingually) then, the mean record will be calculated for each implant. Indices of the two implants will be added to each other, and then divided by 2 to get the mean modified gingival index for each case.

  up to 12 months

• Alveolar bone level

  The level of alveolar bone around each implant will be assessed using CBCT(3D Accuitomo 170, 90 kVp, 5 mA, 30.8 s, 0.08 mm isotropic voxel size, J Morita, Kyoto, Japan) and the field of view will be the lower anterior sextant. The vertical bone change (distance from the implant platform to the first bone-to-implant contact, in mm) around each implant will be assessed at the buccal, lingual, mesial and distal aspects then the mean will be calculated.

  up to 12 months

• Implant stability

  Magnetic Resonance Frequency Analyser will be used to measure the implant stability quotient (ISQ). The instrument measures the resonance frequency through the transducer attached to a implant fixture and display the result ISQ value on a scale of 1 to 100 with higher values indicating higher stability. The measurements will be made three times and the mean will be calculated.

  up to 12 months

Study Arms (2)

Novaloc Attachment

EXPERIMENTAL

Other: Novaloc Attachment

Locator attachment

ACTIVE COMPARATOR

Other: Locator Attachment

Interventions

Novaloc Attachment OTHER

Each patient will receive two inclined implants placed in the mandibular canine region bilaterally using the flapless surgical technique. Patients will receive mandibular overdentures with Novaloc attachments. The proper Novaloc abutments will be selected and screwed on the implants according to the prosthetic platform and the tissue height. The metal housings will be connected to the existing mandibular overdenture by pick-up technique.

Novaloc Attachment

Locator Attachment OTHER

Each patient will receive two inclined implants placed in the mandibular canine region bilaterally using the flapless surgical technique. Patients will receive mandibular overdentures with Locator attachments. The proper Locator abutments will be selected and screwed on the implants according to the prosthetic platform and the tissue height. The metal housings will be connected to the existing mandibular overdenture by pick-up technique.

Locator attachment

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Patients should be completely edentulous.
• Patients should have enough bone for the placement of implants at least 3.5 mm in diameter and 10.0 mm in length.
• Patients should be co-operative and have adequate dexterity for placement and removal of the implant -retained overdenture.
• The inter-ridge space should be sufficient to place the endosseous implants and the superstructures

You may not qualify if:

• Patients with any systematic disease that could complicate the surgical phase or affect osseointegration as osteoporosis and uncontrolled diabetes mellitus.
• Patients with active oral infections.
• Patients with history of radiotherapy in head and neck region.
• Patients with poor oral hygiene.
• Patients with restricted mouth openings ≤ 40mm, functional limitations, or temporo-mandibular disorders.
• Heavy smokers (more than 10 cigarette / day).

Sponsors & Collaborators

• Alexandria University: lead

Study Sites (1)

Faculty of Dentistry, Alexandria University

Alexandria, 21527, Egypt

RECRUITING

Study Officials

• Haitham Ismail, MSc

  Alexandria University

  PRINCIPAL INVESTIGATOR

• Ahmed Al-Shimy, PhD

  Alexandria University

  STUDY DIRECTOR

• Tarek S Abdelazim, PhD

  Alexandria University

  STUDY CHAIR

• Kenda IH Hanno, PhD

  Alexandria University

  STUDY CHAIR

Central Study Contacts

Haitham Ismail, MSc

CONTACT

01282667505; haitham.ismail@alexu.edu.eg

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Lecturer of Prosthodontics

Study Record Dates

• First Submitted: January 13, 2023
• First Posted: January 25, 2023
• Study Start: March 10, 2022
• Primary Completion: June 1, 2023
• Study Completion: June 1, 2023
• Last Updated: January 25, 2023

Record last verified: 2023-01

Locations

EG (1)