Parish Sedghizadeh | |
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Academic background | |
Education | B.S., Biology D.D.S., Dentistry M.S.,Oral Biology |
Alma mater | University of California, Los Angeles University of Southern California Ohio State University |
Academic work | |
Institutions | University of Southern California |
Parish P. Sedghizadeh is a clinician-scientist,and a clinical and surgical oral and maxillofacial pathologist. He is a Professor of Clinical Dentistry,and Section Chair of Diagnostic Sciences in the Division of Periodontology,Diagnostic Sciences &Dental Hygiene at the Herman Ostrow School of Dentistry,University of Southern California. He is also the Director of the Oral Pathology and Radiology Distance Learning Program at the University of Southern California. [1]
His research is focused on skeletal biofilm infections such as osteomyelitis,osteonecrosis,and peri-implantitis. [2] His work includes benchtop investigations into the microbiology and pathology of skeletal infections,and chemical synthesis and testing of novel antimicrobial therapeutics for in vivo and clinical applications in infectious bone disease. He has also conducted clinical trials and translational studies investigating risk factors and therapeutic interventions in osteoporotic and cancer patients with medication-related osteonecrosis of the jaw (MRONJ). [3]
He is a fellow of the Pierre Fauchard Academy. [4]
Sedghizadeh received a B.S. in Biology from the University of California,Los Angeles in 1996 and a D.D.S. in Dentistry from the University of Southern California in 2001. He then joined Ohio State University,where he completed a residency in Oral and Maxillofacial Pathology and received a M.S. in Oral Biology in 2004. [1]
In 2004,Sedghizadeh joined the University of Southern California as an Assistant Professor,becoming an Associate Professor in 2017,and a full Professor in 2021. He developed and serves as the program director for the USC Oral Pathology and Radiology Hybrid Distance Learning Program. [1]
Sedghizadeh was appointed as Section Chair of Diagnostic Sciences at the Herman Ostrow School of Dentistry in 2018. [1]
Sedghizadeh has nearly 100 publications in peer-reviewed journals and textbooks related to head and neck pathology. [2] His manuscripts are highly cited in the literature. [1] Sedghizadeh has received intramural research funding,and extramural grants from the National Institutes of Health,to support his work as a principal investigator. [5] [6]
Sedghizadeh's work identified for the first time that biofilm pathogens are associated with several head and neck conditions,and he has characterized their role in the pathogenesis of such clinical diseases. These conditions include jaw osteomyelitis,osteonecrosis of the jaw (ONJ) associated with anti-resorptive therapy,and ophthalmologic failed surgical stents. [7]
With respect to his main focus of clinical research into jawbone infections like osteomyelitis and osteonecrosis,his work led to the development of novel in vitro and in vivo models to study biofilms,and unique antimicrobial strategies against biofilm pathogens. [8] Sedghizadeh helped test novel cold plasma-based antibiofilm therapeutics for dental applications as a transdisciplinary collaboration with plasma physicists and plasma engineers at USC. In a collaboration with electrical engineers and electromicrobiologists,he characterized and discovered electrically conductive nanowires in pathogenic biofilms isolated from his patients with jawbone infections. [9] Working with chemists,Sedghizadeh designed and tested novel bone-targeted antibiotic conjugates to treat bone infections. [10]
Sedghizadeh established a research program on medication-related osteonecrosis of the jaw (MRONJ) with a transdisciplinary collaborative team initially supported by an institutional interdisciplinary grant and departmental funds at USC. His team has systematically studied and contributed data to the literature addressing the determinants of MRONJ clinically and from a transdisciplinary approach. [11] As a clinician-scientist,his body of work in this field includes observational,descriptive and mechanistic studies,and has encompassed in vitro,ex vivo,and in vivo studies in addition to clinical investigations into pathogenesis and novel therapeutics. [12]
Sedghizadeh's team designed and conducted observational clinical studies into MRONJ patients and published the first epidemiologic institutional study linking MRONJ with oral bisphosphonate drug use in osteoporosis patients. He characterized the pathology and defined the biofilm microbiology of MRONJ specimens to elucidate mechanisms of disease,defined pharmacometric parameters in MRONJ patients and developed a statistical Bayesian-based population pharmacometric paradigm for MRONJ risk assessment clinically,identified novel risk factors associated with MRONJ development clinically,and conducted clinical studies into novel bone-targeted therapeutics. [13] [14]
Phossy jaw, formally known as phosphorus necrosis of the jaw, was an occupational disease affecting those who worked with white phosphorus without proper safeguards. It was most commonly seen in workers in the matchstick industry in the 19th and early 20th centuries. It was caused by white phosphorus vapor, which destroys the bones of the jaw. Modern occupational hygiene practices have since eliminated the working conditions that caused this disease.
Alendronic acid, sold under the brand name Fosamax among others, is a bisphosphonate medication used to treat osteoporosis and Paget's disease of bone. It is taken by mouth. Use is often recommended together with vitamin D, calcium supplementation, and lifestyle changes.
A dental implant is a prosthesis that interfaces with the bone of the jaw or skull to support a dental prosthesis such as a crown, bridge, denture, or facial prosthesis or to act as an orthodontic anchor. The basis for modern dental implants is a biological process called osseointegration, in which materials such as titanium or zirconia form an intimate bond to the bone. The implant fixture is first placed so that it is likely to osseointegrate, then a dental prosthetic is added. A variable amount of healing time is required for osseointegration before either the dental prosthetic is attached to the implant or an abutment is placed which will hold a dental prosthetic/crown.
Avascular necrosis (AVN), also called osteonecrosis or bone infarction, is death of bone tissue due to interruption of the blood supply. Early on, there may be no symptoms. Gradually joint pain may develop which may limit the ability to move. Complications may include collapse of the bone or nearby joint surface.
Dental plaque is a biofilm of microorganisms that grows on surfaces within the mouth. It is a sticky colorless deposit at first, but when it forms tartar, it is often brown or pale yellow. It is commonly found between the teeth, on the front of teeth, behind teeth, on chewing surfaces, along the gumline (supragingival), or below the gumline cervical margins (subgingival). Dental plaque is also known as microbial plaque, oral biofilm, dental biofilm, dental plaque biofilm or bacterial plaque biofilm. Bacterial plaque is one of the major causes for dental decay and gum disease.
Pamidronic acid or pamidronate disodium or APD, is a nitrogen-containing bisphosphonate used to prevent osteoporosis.
SAPHO syndrome includes a variety of inflammatory bone disorders that may be associated with skin changes. These diseases share some clinical, radiologic, and pathologic characteristics.
A dental extraction is the removal of teeth from the dental alveolus (socket) in the alveolar bone. Extractions are performed for a wide variety of reasons, but most commonly to remove teeth which have become unrestorable through tooth decay, periodontal disease, or dental trauma, especially when they are associated with toothache. Sometimes impacted wisdom teeth cause recurrent infections of the gum (pericoronitis), and may be removed when other conservative treatments have failed. In orthodontics, if the teeth are crowded, healthy teeth may be extracted to create space so the rest of the teeth can be straightened.
Dentinogenesis imperfecta (DI) is a genetic disorder of tooth development. It is inherited in an autosomal dominant pattern, as a result of mutations on chromosome 4q21, in the dentine sialophosphoprotein gene (DSPP). It is one of the most frequently occurring autosomal dominant features in humans. Dentinogenesis imperfecta affects an estimated 1 in 6,000-8,000 people.
An oral medicine or stomatology doctor/dentist has received additional specialized training and experience in the diagnosis and management of oral mucosal abnormalities including oral cancer, salivary gland disorders, temporomandibular disorders and facial pain, taste and smell disorders; and recognition of the oral manifestations of systemic and infectious diseases. It lies at the interface between medicine and dentistry. An oral medicine doctor is trained to diagnose and manage patients with disorders of the orofacial region, essentially as a "physician of the mouth".
Ibandronic acid is a bisphosphonate medication used in the prevention and treatment of osteoporosis and metastasis-associated skeletal fractures in people with cancer. It may also be used to treat hypercalcemia. It is typically formulated as its sodium salt ibandronate sodium.
Osteonecrosis of the jaw (ONJ) is a severe bone disease (osteonecrosis) that affects the jaws. Various forms of ONJ have been described since 1861, and a number of causes have been suggested in the literature.
Denosumab is a human monoclonal antibody for the treatment of osteoporosis, treatment-induced bone loss, metastases to bone, and giant cell tumor of bone.
Targanta Therapeutics Corporation was a biopharmaceutical company headquartered in Cambridge, Massachusetts. The company also had operations in Indianapolis, Montreal and Toronto. Targanta completed its initial public offering on October 9, 2007 and traded on the Nasdaq market under the symbol: TARG. Targanta was acquired by The Medicines Company in 2009.
Medication-related osteonecrosis of the jaw is progressive death of the jawbone in a person exposed to a medication known to increase the risk of disease, in the absence of a previous radiation treatment. It may lead to surgical complication in the form of impaired wound healing following oral and maxillofacial surgery, periodontal surgery, or endodontic therapy.
Neuralgia-inducing cavitational osteonecrosis (NICO) is a diagnosis whereby a putative jawbone cavitation causes chronic facial neuralgia; this is different from osteonecrosis of the jaw. In NICO the pain is said to result from the degenerating nerve ("neuralagia"). The condition is probably rare, if it does exist.
The C-terminal telopeptide (CTX), also known as carboxy-terminal collagen crosslinks, is the C-terminal telopeptide of fibrillar collagens such as collagen type I and type II. It is used as a biomarker in the serum to measure the rate of bone turnover. It can be useful in assisting clinicians to determine a patient's nonsurgical treatment response as well as evaluate a patient's risk of developing complications during healing following surgical intervention. The test used to detect the CTX marker is called the Serum CrossLaps, and it is more specific to bone resorption than any other test currently available.
Osteomyelitis of the jaws is osteomyelitis which occurs in the bones of the jaws. Historically, osteomyelitis of the jaws was a common complication of odontogenic infection. Before the antibiotic era, it was frequently a fatal condition.
Tooth mobility is the horizontal or vertical displacement of a tooth beyond its normal physiological boundaries around the gingival area, i.e. the medical term for a loose tooth.
Oral manifestations of systematic disease are signs and symptoms of disease occurring elsewhere in the body detected in the oral cavity and oral secretions. High blood sugar can be detected by sampling saliva. Saliva sampling may be a non-invasive way to detect changes in the gut microbiome and changes in systemic disease. Another example is tertiary syphilis, where changes to teeth can occur. Syphilis infection can be associated with longitudinal furrows of the tongue.