Impact of Alveolar Ridge Preservation on the Potential Need for Sinus Floor Elevation: A 10-year Retrospective Radiographical Study

NCT07526129 | Recruiting

• 1 other identifier: CER-2025-103
• Study Type: observational
• Target: 130
• Locations: 1 country
• Sites: 1

Brief Summary

This research aims to investigate the influence of alveolar ridge preservation, after extraction of maxillary posterior teeth, on the potential need of sinus floor augmentation procedures (that include lateral or crestal sinus augmentations). From peri-apical radiographs, maxillary posterior teeth will be divided into 4 groups according to the relationship of their apexes with the sinus. Then, the patients will be divided into 2 sub-groups: unassisted socket healing (only extraction) and ARP group (extraction + ARP) and their CBCT scans before implant placement will be collected. The CBCT scans should be at least 4 months post-extraction and ARP. Depending on the residual bone height, patients will be divided into 3 categories, according to the ABC classification:

1. 1.In need of lateral sinus floor augmentation
2. 2.In need of crestal sinus floor augmentation
3. 3.No need for sinus floor augmentation, therefore, implant placement.

Conditions

Alveolar Bone Loss; Sinus Floor Augmentation; Alveolar Bone Atrophy; Alveolar Ridge Preservation; Sinus Pneumatization

Keywords

alveolar bone loss; alveolar process atrophy; extraction; tooth socket; sinus floor augmentation

Outcome Measures

Primary Outcomes (1)

• Mid-ridge height in mm

  on CBCT scans taken 4-12 months after extraction (with alveolar ridge preservation or not), mid ridge height will be measured in mm according to the ideal implant position; that will be planned on BlueSky Bio software

  1 year

Secondary Outcomes (1)

• need for either lateral sinus floor elevation, transcrestal sinus floor elevation or simple implant placement.

  1 year

Study Arms (6)

Group 1: extraction + type 1

type 1 : the roots are not touching the maxillary sinus floor

group 2 : extraction + type 1 + ARP

type 1 : the roots are not touching the maxillary sinus floor + having underwent alveolar ridge preservation

Procedure: Alveolar ridge preservation using bony biomaterials

group 3 : extraction + type 2

type 2 : the maxillary roots are touching the sinus floor

group 4 : extraction + type 2 + ARP

type 2 : the maxillary roots are touching the sinus floor + having underwent alveolar ridge preservation

Procedure: Alveolar ridge preservation using bony biomaterials

group 5: extraction + type 3

type 3: the molar roots are protruding in the sinus

group 6 : extraction + type 3 + ARP

type 3: the molar roots are protruding in the sinus + underwent alveolar ridge preservation

Procedure: Alveolar ridge preservation using bony biomaterials

Interventions

Alveolar ridge preservation using bony biomaterials PROCEDURE

After extraction of posterior maxillary molars, teeth who underwent alveolar ridge preservation are included. This includes the extraction, curettage of the socket with a curette to eliminate any granulation tissue, and then the grafting of a bone material into the socket

group 2 : extraction + type 1 + ARP; group 4 : extraction + type 2 + ARP; group 6 : extraction + type 3 + ARP

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

Patients who underwent extraction of posterior maxillary molars at the Saint Joseph University of Beirut's dental center, having underwent alveolar ridge preservation or not.

You may qualify if:

• Patients aged ≥18 years.
• Patients who underwent alveolar ridge preservation after extraction of maxillary posterior teeth, as a test group.
• Patients who underwent extraction of maxillary posterior teeth with unassisted socket healing without alveolar ridge preservation as a control group.

You may not qualify if:

• The presence of a clinically symptomatic periapical radiolucency, acute abscesses, or chronic sinus tract, that may falsify the classification of posterior maxillary teeth on 2D radiographs.

Sponsors & Collaborators

• Saint-Joseph University: lead

Study Sites (1)

Saint Joseph University of Beirut

Beirut, Beyrouth, 1000, Lebanon

RECRUITING

MeSH Terms

Conditions

Alveolar Bone Loss

Condition Hierarchy (Ancestors)

Bone Resorption; Bone Diseases; Musculoskeletal Diseases; Periodontal Atrophy; Periodontal Diseases; Mouth Diseases; Stomatognathic Diseases

Central Study Contacts

Nadine Chamas, Doctor of Dental Surgery

CONTACT

+96176773326; nadinechamas@outlook.com

Nadim Mokbel, DDS, MsC, PhD

CONTACT

+9613256780; nadim.mokbel@gmail.com

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: OTHER
• Target Duration: 12 Months
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 6, 2026
• First Posted: April 13, 2026
• Study Start: January 1, 2025
• Primary Completion: May 1, 2026
• Study Completion (Estimated): May 30, 2026
• Last Updated: April 13, 2026

Record last verified: 2026-04

Locations

LE (1)