Determination of mandibular distraction osteogenesis most suitable parameters. An experimental study.

Background: Distraction osteogenesis is a process of induced bone generation. Various protocols have been described for the management of the latency period, distraction speed and consolidation period, with greater or lesser success.

Objective: To better understand the process of mandibular distraction and establish the determining factors and their optimal times.

Histomorphologic, Biomechanical, and Functional Analysis in Mandibular Osteogenesis Induced by External Distraction.

The induced bone generation procedure (osteogenic distraction [OD]) is frequently used in cases of jaw deformities in patients with, hemifacial microsomia, mandibular hypoplasia, and so on. This study was undertaken to provide criteria to perform this procedure. The authors evaluated the effects of various parameters using OD to determine the optimal variables.

Three-Flap Mastopexy with Reduction or Augmentation.

Background: Many authors have studied breast ptosis and made contributions to the search for a procedure that allows its correction with long-lasting results and minimal scars. Collective evolution has allowed us to reach the point where we are today and will allow us to continue improving techniques in the future.

Objectives: The mastopexy procedure that we have used for the last 11 years, resulting from our surgical practice and countless observations at conferences, is a versatile procedure, applicable to different types of breasts and mastopexies with and without reduction or augmentation.

Restoration of the Age Elongated Auricular Lobe.

Background: The ears increase in all dimensions over the years (eg, length, helix diameter, lobe length), but the most obvious change is the elongation or ptosis of the lobe. Its correction should be considered a part of facial rejuvenation.

Objectives: The authors presented the surgical procedure they have been utilizing to correct elongated earlobes.

Surgical Planning for Mandibular Distraction Osteogenesis Using Low-Cost Three-Dimensional-Printed Anatomic Models.

Mandibular distraction osteogenesis (MDO) is a fairly common procedure in specialized craniofacial surgery centers. The MDO is a minimally invasive technique that is able to generate new bone in patients with a severe hypoplastic ascending ramus, while also expanding the overlying soft tissues; therefore, it has become the treatment of choice for the surgical correction of mandibular hypoplasias. One of the most common postoperative complications involves misplacement of the distractor and/or corticotomy, which can result in the creation of an erroneous distraction vector.

Dimensional Error in Rapid Prototyping with Open Source Software and Low-cost 3D-printer.

Rapid prototyping models (RPMs) had been extensively used in craniofacial and maxillofacial surgery, especially in areas such as orthognathic surgery, posttraumatic or oncological reconstructions, and implantology. Economic limitations are higher in developing countries such as Mexico, where resources dedicated to health care are limited, therefore limiting the use of RPM to few selected centers. This article aims to determine the dimensional error of a low-cost fused deposition modeling 3D printer (Tronxy P802MA, Shenzhen, Tronxy Technology Co), with Open source software.

[Mini-invasive surgical procedure to reverse the aging process].

Reduction of the bony structure of the face is the main reason for flabbiness and drooping of the facial soft tissues. Because we do not currently have recourse to restore the lost bony volume, a good possibility is to reestablish an optimal relationship between the soft tissues and the present bony volume. Based on this principle, we have developed the procedure of mini-invasive subperiosteal facial restoration.

A procedure to prevent cephalic rotation of cartilage grafts in the nasal tip.

Background: The mestizo patient usually has a small nose with a wide base, round nostrils, and a convex dorsum. The alar cartilages are weak, thin, and short, providing deficient structural support and poor definition of the nasal tip. Cartilage grafts in the nasal tip are very often used to correct this condition, but a common problem of this procedure is the cephalic or lateral rotation of these grafts.

Update on minimally invasive face lift technique.

Background: The aging face is characterized by loss of skin elasticity, fat resorption, loss of muscle tone and volume, and loss of bone volume. Restorative procedures should be based on the condition of the soft tissues and the relationship between these tissues and the existing skeletal volume and can be performed through open, endoscopic, or minimally invasive approaches.

Objective: A minimally invasive approach to the face lift is presented, updated with useful details that the author has incorporated into his clinical technique on the basis of 15 years of experience.

[Effects of zygomatic arch resection in rat].

Eighty-two-day-old male Wistar rats were selected to study the pattern of craniofacial growth following partial or total resection of zygomatic arches. Rats were divided into five groups: Group I or control group; group II, with unilateral partial resection of zygomatic arch; group III, with bilateral partial resection; group IV, with unilateral total resection, and group V, with bilateral total resection of zygomatic arch. Direct dry skull and cephalometric measurements showed increased facial projection and decreased transverse facial width on side of resected arch.

[Long-term stability with absorbable plates and internal fixation in orthognatic surgery].

The author presents his experience using biodegradable self-reinforced polylactide (SR-PLLA) plates, and screws in orthognathic surgery to fixate horizontal and segmentary osteotomies of maxillae in 142 cases. Experience was confirmed by using the same elements to treat acute fractures, old fractures, and craniodisostosis for a total of 208 cases with maximum follow-up of 8 years. Characteristics of these materials are described, as well as the method used to place them; indications and complications are observed.