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[Guided bone tissue regeneration--a clinical and histological pilot study]
H C Wachtel1, A Langford, L Vettin
1Polikliniken Nord für ZMK, Freie Universität Berlin.
Deutsche Zahnarztliche Zeitschrift
|August 1, 1990
Summary
Guided tissue regeneration with membranes and hydroxyapatite granules successfully generated new bone around dental implants in humans. This technique shows promise for enhancing osseointegration and bone formation.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Oral and Maxillofacial Surgery
Background:
- Osseointegrated implants are crucial for dental restoration.
- Generating new bone around implants is essential for long-term success.
- Guided tissue regeneration (GTR) principles offer a potential solution.
Purpose of the Study:
- To evaluate the efficacy of a guided tissue regeneration technique in forming new bone tissue around human osseointegrated implants.
- To compare GTR with membrane alone and hydroxyapatite granules alone.
Main Methods:
- 14 IMZ titanium implants were placed in 4 patients, modified with hydroxyapatite (HA) or titanium discs.
- Three treatment groups: 1) HA granules + ePTFE membrane, 2) membrane alone, 3) HA granules alone.
- Histological examination after 2-4 months of healing.
Main Results:
- Group I (HA + membrane) showed significant new trabecular bone formation adhering to the implant and alveolar bone.
- Group II (membrane alone) resulted in minimal tissue regeneration and space reduction.
- Group III (HA alone) showed connective tissue encapsulation around HA granules and discs.
- Flap dehiscence was a notable clinical complication.
Conclusions:
- The membrane technique based on guided tissue regeneration effectively promotes new bone formation around osseointegrated implants in humans.
- Combining HA granules with a membrane enhances bone regeneration compared to membrane or HA alone.
- Further studies with larger sample sizes are warranted.