Osseodensification Versus Osteotome Internal Sinus Lifting in Delayed Implant Placement

Ain Shams University20 enrolled

Overview

The sinus lift technique through alveolar crest Osseodensification is conservative, minimally invasive, and minimally traumatic, utilizing hydropneumatic counterclockwise rotating instruments to lift the maxillary sinus floor without touching the Schneiderian membrane, thereby minimizing the risk of perforation. In contrast, the internal sinus lift technique utilizing osteotomes to raise the Schneiderian membrane eliminated hammering, making the technique more patient-friendly, with the placement of a graft biomaterial around the implant. The challenge in this technique was the availability of \> 5mm residual bone height preventing membrane perforation and low primary implant stability. Consequently, the investigator aims to compare the efficacy and clinical outcomes of Osseodensification and Osteotome internal sinus lifting after delayed implant placement by assessing bone gain and bone density around implants radiographically, the primary stability of the implants clinically, and patient satisfaction.

Twenty patients with maxillary posterior edentulous ridge will be randomly assigned to one of two equal groups: Osseodensification sinus lift using sticky bone as a graft material (Group 1) and Osteotome internal sinus lift using sticky bone as a graft material (Group 2). (Group 2). Using Cone Beam Computed Tomography (CBCT), the sinus anatomy and height and width of the residual ridge from the sinus floor to the alveolar crest of all patients will be evaluated prior to surgery. Each patient will then receive pre-surgical medication consisting of intravenous steroidal anti-inflammatory drug (dexamethasone sodium phosphate 4mg) one hour prior to the procedure and oral rinsing with 0.12 percent chlorhexidine for one minute. After surgery, patients will receive 14 days of twice-daily chlorhexidine rinses 0.12 percent for postoperative treatment. Patients allergic to penicillin are given 1 g amoxicillin twice daily for six days or 0.5 g azithromycin. Ibuprofen (400) should be administered three times daily unless medically contraindicated. After insertion, the primary stability of each implant will be evaluated using a torque wrench and an Osstell device. All patients will undergo immediate postoperative CBCTs to assess bone gain and bone density. Utilizing the Visual Analogue Scale, patients' pain will be evaluated (VAS). A health-related quality of life questionnaire will be used to evaluate the patients' perception of recovery in terms of pain, oral function, general activity, and other symptoms. Postoperatively, the operator's subjective satisfaction with Osseodensification and Osteotome sinus lift techniques will be evaluated using a second printed questionnaire.

Study Type

Interventions

Osseodensification Internal Sinus LiftPROCEDURE

The osteotomy for the Osseodensification internal sinus lift begins with the advancement of a twist drill at 800 rpm and saline irrigation to within 1-2 mm of the sinus floor. The osteotomy is then widened by employing a series of osteotomy drills rotating at 800 rpm. Infracture of the sinus has occurred when the final osteotomy drill is advanced with gentle pressure at 100 rpm counterclockwise without irrigation until a bouncing sensation ("haptic feedback") occurs. After infracture, the graft material will be injected into the osteotomy site. Using the final osteotomy drill, the graft is guided apically. This procedure is repeated incrementally to raise the membrane. Once sufficient space has been created beneath the antral membrane, the implant will be inserted followed by suturing.

Osteotome Internal Sinus LiftPROCEDURE

The osteotomy for the Osteotome internal sinus lift will begin with standard drills and saline irrigation to prepare the implant socket with a working length that is 1-2 mm shorter than the residual bone height as determined by radiographic examination. After preparation, a series of osteotomes of varying diameters will be sequentially utilized to widen the osteotomy and elevate the Schneiderian membrane by vertical tapping to create a "greenstick" fracture. The Valsalva maneuver (nasal blowing test) will be performed to determine the integrity of the Schneiderian membrane. During the osteotomy, the graft material will be injected and slowly placed into the elevated space using osteotomes until the desired depth is reached. Implant placement and suturing will conclude the procedure.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * 1\. Patient partially edentulous with maxillary posterior edentulous ridge after extraction of more than 4 months. 2\. Both sexes will be selected males and females. 3\. Adult patients aged between 18 and 40 years of age. 4\. Good general health (American Society of Anesthesiology Physical Status Ⅰ-Ⅱ). 5\. Initial residual alveolar ridge height ranging between 4 to 6 mm according to preoperative CBCT. 6\. No previous surgery or radiation treatment on the maxillary sinus. Exclusion Criteria: * 1\. Smokers. 2\. Pregnant or lactating females. 3\. Psychiatric disorders. 4\. Uncontrolled systemic disease. 5\. Hematologic diseases and coagulation disorders. 6\. Chemotherapy or radiotherapy of the head and neck area, and immunocompromised status. 7\. Medical conditions affecting bone metabolism and ongoing treatment with bisphosphonates drugs or systemic steroids. 8\. Presence of acute or chronic sinus pathoses or sinus membrane perforation.

Outcomes

Primary Outcomes

Radiographic Assessment of Change in the Vertical Bone Height (Bone Gain).

The outcome will be obtained by the aid of Computed Cone Beam Tomography, assessing the amount of change from the pre-operative to the post-operative vertical bone height in millimeters.

Time frame: Pre-operative and Immediately post-operative.

Radiographic Assessment of Change in the Bone Density.

The outcome will be obtained by the aid of Computed Cone Beam Tomography assessing the amount of change from the pre-operative to the post-operative bone density values in Hounsfield unit.

Time frame: Pre-operative and Immediately post-operative.

Secondary Outcomes

Clinical Assessment of Primary Stability of the Implants ( Insertion Torque Value) Measured by a Torque Wrench.

The outcome will be obtained by the aid of a torque wrench and recorded in Newton centimeters. ( low torque (\<30), medium torque (30 \< Insertion Torque \< 50), and high torque (\>50).

Time frame: During procedure.

Clinical Assessment of Primary Stability of the Implants (Implant Stability Quotient ) Measured by an Osstell® Device.

The outcome will be obtained by the aid of an Osstell device, measured by the Resonance Frequency Analysis and determined by the Implant Stability Quotient ( within a 0-100 scale; 100 being maximum implant stability) .

Time frame: During procedure.

Patient's Post-Operative Pain Assessment

The outcome will be obtained by the aid of a 100 mm Visual Analogue Scale (0 = minimal to; 100 = maximum)

Time frame: 1 week post-operative

Patient's Satisfaction Assessment.

The outcome will be obtained by the aid of a health-related quality of life questionnaire designed to assess the patient's perception of recovery concerning pain, oral function, general activity, and other symptoms.

Time frame: 1 week post-operative

Operator's Satisfaction Assessment

The outcome will be obtained by the aid of a a questionnaire assessing the operator's satisfaction with Osseodensification and Osteotome sinus lift techniques.

Time frame: 1 year