A modified approach to "model planning" in orthognathic surgery for patients without a reliable centric relation.
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Adolescent↗
Biomedical subjects
Jeffrey C Posnick
Publications and source records attributed to Jeffrey C Posnick.
Deliberate operative rotation of the maxillo-mandibular complex to alter the A-point to B-point relationship for enhanced facial esthetics.
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Adult↗
Strength analysis of titanium and resorbable internal fixation in a mandibulotomy model.
PURPOSE: Mandibulotomy is used to access various tumors of the tongue base, posterior oral cavity, pharynx, parapharyngeal space, and cranial base. Internal fixation using titanium plates and screws is the most common method of stabilization. These have the potential for interference with radiotherapy delivery. This in vitro study compares the strength of titanium and resorbable internal fixation in a mandibulotomy model by analyzing the force required for plate and screw breakage. MATERIALS AND METHODS: Red oak wood board was used to simulate the mandible. Titanium and resorbable plates and screws in various configurations were used to stabilize pieces of the wood. They were arranged in 6 different groups. The specimens were individually tested with a vertical load, while the test machine recorded the force-versus-displacement behavior automatically. RESULTS: Plate type and configuration affected the applied load required to induce displacement of the simulated mandibulotomy. Heating and cooling the resorbable plates prior to strength testing also affected the load-versus-displacement curve. CONCLUSIONS: Overall, the titanium system we studied exhibited greater resistance to deformation from a vertical load than did the resorbable plate groups.
Absorbable Implants↗
Degradation rate of delta (resorbable) internal fixation: report of 2 cases.
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Absorbable Implants↗
Cleft-orthognathic surgery.
For the cleft patient presenting in adolescence with a jaw discrepancy and malocclusion, misinformation and limited available surgical and dental expertise often prevents a favorable facial reconstruction and dental rehabilitation. A major advantage of the modified Le Fort I osteotomy is its ability to simultaneously close cleft dental gap(s), resolve oronasal fistulas, manage skeletal defects, stabilize dentoalveolar segments, and correct jaw deformities. When a thoughtful staging of reconstruction is undertaken, individuals born with cleft lip and palate can reach adolescence after undergoing only a limited number of operations and interventions, without negative attention being drawn to their original malformation.
Adolescent↗
The role of maxillofacial osteotomies in the treatment of obstructive sleep apnea.
Selective osteotomies of the maxillofacial skeleton can improve airway dynamics and allow for more efficient airflow in patients with obstructive sleep apnea (OSA). The success of these procedures for patients with OSA is well documented. This article reviews the indications and treatment considerations for maxillofacial osteotomies to improve airway dynamics in patients with OSA.
Female↗
Dermoid cysts, gliomas, and encephaloceles: evaluation and treatment.
The fronto-orbitonasal malformations of encephaloceles, dermoid sinus cysts, and gliomas represent a continuum of neuroectodermal anomalies. The differentiation between them and other similar-appearing lesions is essential for effective management to proceed. Obtaining a reliable history, completing a careful physical examination, and obtaining accurate radiographic documentation represent the first steps. Establishing the timing, staging, and specific surgical techniques for management of a fronto-orbitonasal encephalocele remains as much an art as a science.
Child↗