Influence of Implant Insertion Depth on Peri-implant Bone Changes Around Short Implants

Summary

Dental implants are widely used to replace missing teeth and restore oral function and aesthetics. One of the key factors affecting the long-term success of dental implants is the stability of the bone surrounding the implant, particularly the crestal bone around the implant neck. Implant insertion depth relative to the alveolar crest may influence peri-implant tissue health and marginal bone remodeling.

This randomized controlled clinical trial aims to evaluate the influence of implant placement depth on peri-implant health and radiographic bone changes around short dental implants placed using guided surgical protocol. All implants will be placed using the Bicon Implant System following computer-guided implant planning and surgical guide fabrication to ensure precise implant positioning.

Participants requiring implant therapy will be randomly allocated into two groups. In the test group, implants will be placed 2 mm below the crestal bone level (subcrestal placement). In the control group, implants will be placed at the crestal bone level (crestal placement). Implant placement will be performed using guided implant surgery to standardize surgical positioning and minimize variability in implant angulation and depth.

Clinical parameters related to peri-implant health, including Modified Plaque Index, Implant Mucosal Index, Peri-implant Mucosal Tissue Index and Probing Depth during follow-up visits at 3, 6 and 12 months. In addition, standardized radiographic examinations will be performed to measure peri-implant Crestal bone level changes at 12 months.

The primary objective of this study is to determine whether subcrestal implant placement (2 mm below the bone crest) results in improved preservation of peri-implant crestal bone compared with crestal implant placement. Secondary outcomes will include assessment of peri-implant soft tissue health and overall implant stability.

The findings of this study may help clarify the optimal implant insertion depth for short implants placed using guided surgery and may contribute to improving long-term implant success and peri-implant tissue stability.

Conditions

• Tooth Loss
• Edentulism
• Peri-implant Bone Loss

Interventions

PROCEDURE

Subcrestal Dental Implant Placement

Placement of short dental implants using a computer-guided surgical protocol with the implant positioned 2 mm below the alveolar crest (subcrestal placement). Implant placement will be performed using a surgical guide following digital implant planning to standardize implant position, angulation, and insertion depth. Short implants from the Bicon Implant System will be used. Postoperative evaluation will include clinical assessment of peri-implant health parameters (Modified Plaque Index, Implant Mucosal Index, Peri-implant Mucosal Tissue Index, and Probing Depth) at 3, 6, and 12 months, and radiographic assessment of peri-implant crestal bone level changes at 12 months.

PROCEDURE

Crestal Dental Implant Placement

Placement of short dental implants using a computer-guided surgical protocol with the implant positioned at the level of the alveolar crest (crestal placement). Implant placement will be performed using a surgical guide following digital implant planning to standardize implant position, angulation, and insertion depth. Short implants from the Bicon Implant System will be used. Clinical evaluation of peri-implant health parameters (Modified Plaque Index, Implant Mucosal Index, Peri-implant Mucosal Tissue Index, and Probing Depth) will be performed at 3, 6, and 12 months, and radiographic evaluation of peri-implant crestal bone level changes will be conducted at 12 months.

Sponsors & Collaborators

• Gulf Medical University

  lead OTHER

Principal Investigators

• Mohamed Atef Sayed, Ph.D. · Gulf Medical University

• Marwa Mahayni, M.D.S · Gulf Medical University

• Hesham Marei, Ph.D. · Gulf Medical University

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2026-03-30

Primary Completion

2027-05-30

Completion

2027-05-30

Countries

• United Arab Emirates

Study Locations