Early Periimplant Tissue Healing on 1-Piece Implants With a Concave Transmucosal Design: A Histomorphometric Study in Dogs.
BACKGROUND
The purpose of our study was to investigate the early healing phase of marginal bone and soft tissues around unloaded 1-piece implants with a concave transmucosal design, in a dog model.


METHODS
Twenty-four 1-piece implants with a concave transmucosal neck were inserted 1 mm subcrestally in the mandibular ridge of 8 beagle dogs. Four animals were sacrificed after 3 and 12 weeks of healing. Histomorphometric analysis was performed to measure the height of the periimplant tissues.


CONCLUSIONS
The overall height of the periimplant mucosa was, respectively, 2.67 and 2.52 mm, after 3 and 12 weeks. In the connective tissue, a soft tissue O-ring seal was observed in the healing area provided by the transmucosal concavity, after 12 weeks. The location of the first bone-to-implant contact facing the implant shoulder was 0.00 and +0.18 mm, respectively, after 3 and 12 weeks of healing. Some bone apposition occurred on the implant shoulder during the healing.


CONCLUSIONS
Within the limits of the present study, a concave transmucosal design in 1-piece implants was associated with a short vertical value of biological width and promoted a mechanical interlocking of the implant body at the connective tissue and marginal bone levels.
*Student PhD, Laboratoire des Multimatériaux et Interfaces UMR CNRS 5615, Université Lyon 1, Université de Lyon, Villeurbanne, France; Assistant Professor, Université de Rennes 1, Faculté d'Odontologie, Université Européenne de Bretagne, Rennes, France; Hospital Practitioner, CHU de Rennes, Pôle d'Odontologie et de Chirurgie Buccale, Rennes, France. †Associate Professor, Department of Public Health, Institute of Pharmacy (ISPB), EA4173, Université Lyon 1, Université de Lyon, Lyon, France; Hospital Practitioner, Service de Biostatistiques, Hospices Civils de Lyon, Lyon, France. ‡Professor, Interactions Cellule Environment UPSP ICE 2011-03-101, Vet Agro Sup, Université de Lyon, Marcy l'Etoile, France. §Associate Professor, UFR Odontologie, Université Lyon 1, Lyon, France; Hospital Practitioner, Service de Consultations et de Traitements Dentaires, Hospices Civils de Lyon, Lyon, France. ¶Research Director, INSERM, UMR 1033, Université de Lyon, Lyon, France. ‖Professor, Laboratoire des Multimatériaux et Interfaces UMR CNRS 5615, UFR Odontologie, Université Lyon 1, Université de Lyon, Lyon, France; Hospital Practitioner, Service de Consultations et de Traitements Dentaires, Hospices Civils de Lyon, Lyon, France.
Caroline
C
Bolle
Marie-Paule
MP
Gustin
Didier
D
Fau
Patrick
P
Exbrayat
Georges
G
Boivin
Brigitte
B
Grosgogeat
D000539:Alveolar Process / Q000473:pathology*; D000818:Animals; D003094:Collagen / Q000378:metabolism; D059605:Dental Implant-Abutment Design / Q000009:adverse effects / Q000379:methods; D003758:Dental Implantation, Endosseous / Q000009:adverse effects; D015921:Dental Implants / Q000009:adverse effects; D004285:Dogs; D009061:Mouth Mucosa / Q000473:pathology*; D014945:Wound Healing
D015921:Dental Implants; D003094:Collagen