Bone regeneration using a hollow hydroxyapatite space-maintaining device for maxillary sinus floor augmentation--a...

Area of Science:

• Oral and Maxillofacial Surgery
• Biomaterials Science
• Regenerative Dentistry

Background:

• Sinus lift procedures create space for bone regeneration by lifting the maxillary sinus membrane.
• Limited residual alveolar bone height presents a challenge for dental implant placement.

Purpose of the Study:

• To assess bone formation using a spherical, hollow, and perforated hydroxyapatite space-maintaining device (HSMD).
• To evaluate the efficacy of HSMD in two-stage sinus lift procedures with residual alveolar bone height of 2 mm or less.

Main Methods:

• Spherical, hollow, and perforated HSMDs (12 mm diameter) were used in three patients with 1-2 mm residual bone height.
• Bone formation was assessed via cone beam computerized tomography (CBCT) at 6 months post-procedure.
• Histological evaluation of bone-ingrowth and endoscopic assessment of the sinus membrane were performed.

Main Results:

• CBCT confirmed bone formation around and within the HSMD in all patients.
• Successful insertion of 12 mm implants was achieved, preserving sinus membrane integrity.
• Histology showed bone formation within two of three HSMDs; implants remained stable with no marginal bone loss after 1 year.

Conclusions:

• The spherical, hollow, and perforated HSMD facilitates new bone formation in sinus lift procedures.
• This device enables subsequent dental implant installation even in cases of severely atrophic alveolar ridges.
• HSMD represents a viable option for sinus augmentation and implant rehabilitation.