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Clinical case

BTK

May 5, 2025

Alveolar preservation with synthetic biomaterial and slow resorbing collagen membrane

Dr. Stefano Volpe

• Graduated in Medicine and Surgery from the “La Sapienza” University of Rome and specialized in Odontostomatology at the same institution.
• Active member of the Italian Society of Osseointegration (SIO) and member of the European Association for Osseointegration (EAO); Founder of the “Fiera-Feltre Implant Group Research.”; Member of the Editorial Board of the journal Clinical Implant Dentistry and Related Research (CIDRR).
• Speaker at numerous national and international conferences, as well as postgraduate master’s programs and private training courses; author and co-author of scientific articles on periodontology, bone reconstruction, and oral implantology.
• He practices privately at his clinic in Rome, focusing exclusively on periodontology, implantology, and prosthetics, with an interdisciplinary perspective and approach.

case report

case report

After the extraction of a dental element, complications arise from the inevitable reduction in tissue volume, as the alveolar ridge undergoes a remodeling process that impacts implant therapy in the edentulous area.

To counteract this volumetric reduction and achieve better aesthetic outcomes, several techniques have been developed involving biomaterials, membranes/barriers, or implants.

In certain situations, clinicians may need to preserve the post-extraction site or reconstruct one or more missing walls to ensure proper implant placement.

We describe here a case of alveolar preservation performed with the synthetic biomaterial Rigenera BCP granules 1 mm (30% slow-resorbing hydroxyapatite and 70% beta-tricalcium phosphate) from Btk and a slow-resorbing membrane made of heterologous mesenchymal tissue.

A 42-year-old female patient present- ed with internal resorption of tooth 1.1 and misalignment of the gingival contour with tooth 2.1 (Fig. 1).

FIG.1A Macro extraoral frontal photo of the smile showing evident occlusal imbalance.
The presence of the 1.1 root apex in contact with the nasal floor is clear- ly visible (Fig. 2), making immedi- ate post-extraction implant place- ment impossible. Thus, we opted for post-extraction alveolar preservation using the technique described below. In Figure 3, after the extraction, the alveolus was filled with the Rigenera 1 mm biomaterial mentioned above and covered with a slow-resorbing membrane. The occlusal view shows how the membrane was intentional- ly left exposed. Avoiding coronal ad- vancement flaps has the advantage of preserving the mucogingival line and increasing keratinized tissue.

At 5 months post-healing, as seen in Figure 4, the X-ray and clinical examination reveal a well-regenerated ridge. The condition of the ridge was optimal for implant placement.

We proceeded with the insertion of a Safe implant by Btk, with the post-surgical X-ray shown in Figure 5.

“To achieve better aesthetic outcomes, several techniques have been developed involving biomaterials, membranes, or implants.”

The prosthetic rehabilitation in metal-ceramic is displayed in Figure 6, along with the post-rehabilitation condition at the 2-year follow-up, which brought great satisfaction to the patient.

NOTES

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