The Synergistic Effect of Leukocyte Platelet-Rich Fibrin and Micrometer/Nanometer Surface Texturing on Bone Healing around Immediately Placed Implants: An Experimental Study in Dogs.

Aims. This study evaluated the effects of L-PRF presence and implant surface texture on bone healing around immediately placed implants. Methods. The first mandibular molars of 8 beagle dogs were bilaterally extracted, and implants (Blossom™, Intra-Lock International, Boca Raton, FL) were placed in the mesial or distal extraction sockets in an interpolated fashion per animal. Two implant surfaces were distributed per sockets: (1) dual acid-etched (DAE, micrometer scale textured) and (2) micrometer/nanometer scale textured (Ossean™ surface). L-PRF (Intraspin system, Intra-Lock International) was placed in a split-mouth design to fill the macrogap between implant and socket walls on one side of the mandible. The contralateral side received implants without L-PRF. A mixed-model ANOVA (at α = 0.05) evaluated the effect of implant surface, presence of L-PRF, and socket position (mesial or distal), individually or in combination on bone area fraction occupancy (BAFO). Results. BAFO values were significantly higher for the Ossean relative to the DAE surface on the larger mesial socket. The presence of L-PRF resulted in higher BAFO. The Ossean surface and L-PRF presence resulted in significantly higher BAFO. Conclusion. L-PRF and the micro-/nanometer scale textured surface resulted in increased bone formation around immediately placed implants.

[Autotransplantation of premolars in treatment of tooth loss in the anterior maxilla]. / Autotransplantation af praemolarer til behandling af tandtab i overkaebefronten.

The value of autotransplantation of premolars to the anterior region is demonstrated in three cases where respectively one, two and four maxillary incisors were lost due to trauma. It is stressed that a careful analysis should precede this treatment approach.

[Autotransplantation of teeth: indication, technic and prognosis]. / Autotransplantasjon av tenner: indikasjon, teknikk og prognose.

An account is given of the most important indications for tooth transplantation. The developmental stage of the tooth most suitable for transplantation and the special demands to the recipient site, are considered. Each main group of indication is illustrated with case reports. Finally, factors influencing the prognosis of the transplant are discussed.

Controlled slicing in the management of congenitally missing second premolars.

This report describes a simple method of allowing permanent first molars to drift mesially in patients with congenitally missing second premolars, thus facilitating future orthodontic treatment. Controlled slicing of the deciduous second molar between the ages of 8 and 9 years produced a bodily controlled mesial movement of the permanent first molar in less than 1 year with no or minor rotations or inclination. These results are compared with controlled slicing in 10- to 11-year-olds and with treatment involving extraction alone.