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Completed

NCT Number: NCT07329179

Crestal Sinus Lifting Using Densah Burs Versus Lateral Window Technique at Residual Alveolar Ridge Height 3-5 mm With Simultaneous Implant Placement

The aim of the study was to assess the clinical and radiographic outcomes of crestal sinus lifting using densah burs versus lateral window technique in vertically deficient posterior maxilla with simultaneous implant placement.

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Key information

Conditions

Sinus Pneumatization

Age range

18 year–55 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Faculty of Dentistry, Mansoura University

Al Mansurah, Dakahlia Governorate, Egypt

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 1. Patient medically free from systemic, immunologic or debilitating diseases or local conditions that could affect normal bone healing and/or implant placement.
  • Patient with good oral hygiene. 3. Age from 18 to 55 years. 4. Partially edentulous patients with missed one or more of maxillary posterior teeth with residual alveolar ridge height 3-5 mm and a minimal width of the alveolar ridge 7 mm in the region of the planned implant site.
  • Patients' edentulous ridges covered with optimal width of keratinized mucosa (<3 mm) with no signs of inflammation, ulceration of scar tissue.
  • No history of parafunctional habits. 7. Patients were ready to comply with the follow-up and maintenance program. 8. Sufficient inter arch space for prothesis.

Exclusion criteria

  • 1. Patients with clinical or radiographic evidence of rhinosinusitis or any other pathology in the maxillary sinus.
  • Smokers. 3. Pregnancy.

Treatment and study plan

crestal sinus lifting using densah burs

Procedure
  • Crestal flap was made.
  • 2 mm densah bur was used first as a pilot drill in clockwise direction and stopped 1 mm before sinus floor. Implant surgical motor setting was changed to reverse.
  • The next wider densah bur (3.00 mm) was used and advanced into the previous created osteotomy. When feeling the haptic feedback of the bur reaching the dense sinus floor, pressure was modulated with a pumping motion to advance past the sinus floor in 1 mm increments, up to 3 mm.
  • The sequential wider densah burs were used in densifing mode with copious irrigation with pumping motion to achieve additional width with maximum membrane lift of 3 mm to reach final desired width for implant placement.
  • The osteotomy was filled with a well hydrated, xenograft. The last densah bur was used in densifing mode with low speed 150-200 rpm with no irrigation.
  • The implant was placed into the osteotomy.

sinus lifting using lateral window technique

Procedure
  • Trapezoidal flap was made and full thickness mucoperiosteal flap was raised to visualize the lateral side of the maxilla. (Fig. 23)
  • Complete osteotomy of lateral window was made to gain access to the Schneiderian membrane using piezosurgery unit to minimize the probability of membrane perforation with round tip (SL3).
  • Sinus membrane elevators were used carefully to free up sinus membrane in all directions (mesially, distally and medially).
  • The membrane at the inferior aspect of the osteotomy was dissected from the floor of the maxillary sinus and elevated upward to create a space in the floor of the sinus for the bone graft material.
  • Drilling of the implant was done using surgical implant kit while using periosteal elevators to protect schniderian membrane.
  • Bone graft was packed under the membrane in all directions with the help of pluggers till reach the medial wall of the maxillary sinus.
  • Implant was placed and the lateral osteotomy was covered with collagen membrane

Other names: lateral sinus lifting

Primary outcomes

  1. change from baseline in pain, as measured by Numerical Rating Scale (NRS)

    Time frame: Baseline, 7 days

    Pain was evaluated postoperatively at the day of surgery, 3rd and 7th day post-surgically Numerical Rating Scale (NRS). Numerical Rating Scale (NRS) is a simple, widely used tool, typically an 11-point scale (0-10), where patients rate their pain intensity, with 0 meaning "no pain" and 10 meaning "worst imaginable pain,".

  2. change from baseline of edema

    Time frame: baseline, 7 days

    Edema was evaluated with the aid of tape measure (in centimeters). Three measurements were performed on the patient's operated site preoperatively, 3rd and 7th day after surgery. The evaluation of edema was done by subtracting the total value of the three measurements obtained postoperatively (at 3rd and 7th day) from the total value of the three measurements obtained at pre-operative baseline.

    The three measuring lines are:

    • Lateral corner of the eye-angle of the mandible.
    • Tragus-outer corner of the mouth.
    • Tragus pogonion.

  3. change of implant stability, as measured by osstell

    Time frame: baseline, 12 months

    Stability was measured with osstell (ISQ) immediately after implant placement (T0) after 12 months (T12). ISQ is a scale that ranges from 1 to 100 and is used to assess implant stability. Scales greater than 70 ISQ indicate a high level of stability, scales between 60 and 69 means medium stability and scales >60 ISQ are considered as low stability.

  4. change from baseline in Grafted sinus height (GSH)

    Time frame: baseline, 12 months

    CBCT was made preoperatively, immediately after sinus augmentation (T0) and 6 months after loading (T12) for evaluation of Grafted sinus height (GSH): the distance between the original sinus floor to the new sinus floor regarding crestal cortical line.

Sponsors and collaborators

Lead sponsor

Delta University for Science and Technology

Other

Collaborators

  • Mansoura University

Registry information

Important dates

Study start
2023
Primary completion
2025
Study completion
2025
First posted
Jan 9, 2026
Registry last updated
Jan 9, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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