Applicability of equine hydroxyapatite collagen (eHAC) bone blocks for lateral augmentation of the alveolar crest. A histological and histomorphometric analysis in rats.

This study assessed the mechanical characteristics, biocompatibility and osteoconductive properties of an equine hydroxyapatite collagen (eHAC) bone block when applied as a bone substitute for lateral augmentation of rat mandible. 96 rats underwent lateral augmentation of the mandible, using two substitute bone blocks (eHAC or Bio-Oss spongiosa) or autologous bone grafts. Signs of inflammation, amount of bone formation and ingrowth of bone into the bone blocks were assessed at 1 and 3 months.

[Nerve injury during mandibular third molar surgery. The importance of preoperative diagnosis and surgical skill].

A 26-year-old woman was referred by a dentist to an oral and maxillofacial surgeon after an unsuccessful attempt to remove a mandibular third molar. A panoramic radiograph showed the remaining root of the third molar and the patient suffered from insensitivity of the lower lip. The root of the third molar was removed surgically.

Pseudocyst formation after abdominoplasty--extravasations of Morel-Lavallée.

A soft tissue injury can lead to the formation of a pseudocyst in the subcutaneous adipose tissue, due to a seroma, haematoma or fat necrosis. These cysts were first described in 1853 by the French physician Morel-Lavallée. He observed the phenomenon in the lower limb in women after a tangential trauma with separation of the fatty layers.