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Biomedical subjects

O Nahlieli

Publications and source records attributed to O Nahlieli.

At least 37 records · Page 2Linked to original sources
PubMed2000

Minimally invasive orthognathic surgery: endoscopic vertical ramus osteotomy.

The endoscopic procedure for placement and activation of a distraction device for mandibular advancement has been previously reported. The purpose of this study was to demonstrate the feasibility of endoscopic exposure, dissection and osteotomy for mandibular set-back. Two cadaver and three anesthetized minipigs were used in this study. Access to the mandibular ramus was achieved through a 2.0 cm submandibular incision. The dissection was carried sharply to the mandible and completed in the subperiosteal plane. Visualization was achieved using a 2.7 mm diameter endoscope (Karl Storz, Germany). Landmarks were identified and a custom-made retractor was inserted into the sigmoid notch. A vertical ramus osteotomy was created (bilaterally) from the sigmoid notch to the mandibular angle. The mandible was set back (average 6 mm) and fixed using 2.0 mm diameter, bicortical screws. Live animals were sacrificed three weeks postoperatively. The mandibles were examined clinically and radiographically to verify proper osteotomy position and clinical union. In all animals, exposure, accurate identification of landmarks, osteotomy placement and screw fixation were achieved. In the live animals (n=3), union between the proximal and distal segments was documented by clinical and radiographic examination. This study demonstrates the feasibility of the EVRO procedure for mandibular set-back in a minipig model.

Animals↗
PubMed1999

[Video-endoscopy of the major salivary glands].

Videoendoscopy is a minimally invasive procedure for the diagnosis and therapy of sialopathies of the major salivary glands. The main indication is sialolithiasis of the submandibular and parotid glands. Sialoendoscopy offers, on the one hand, a diagnostic method for radiolucent calculi in particular and, on the other, can be used to simultaneously remove calculi. Furthermore, endoscopy is of high value for the diagnosis and treatment of other salivary gland diseases in which there are pathological changes of the ductal system. For example, regeneration of the gland is now possible in cases of chronic sialadenitis, due to the removal of a sialostenosis. Sialadenectomy can thereby be avoided.

Endoscopy↗
PubMed1999

Endoscopic technique for the diagnosis and treatment of obstructive salivary gland diseases.

PURPOSE: This article describes the use of endoscopy for diagnostic and surgical intervention in the major salivary glands of patients who have obstructive pathology, reviews past experience with this technique, and describes the microanatomy and pathophysiologic findings encountered during endoscopy of these glands. PATIENTS AND METHODS: A total of 154 salivary glands (96 submandibular glands, 57 parotid glands, 1 sublingual gland) suspected of having obstructive pathology (89 males, 65 females; aged 5 to 72 years) were treated using a mini-endoscope. Most procedures were performed under local anesthesia in an outpatient clinic. All patients underwent preoperative and postoperative screening by routine radiography, sialography, and ultrasound. The indications for endoscopy were: 1) calculus removal that could not be performed by conventional methods, 2) screening of the salivary ductal system for residual calculi after sialolithotomy, 3) positive evidence of ductal dilatation or stenosis on the sialogram or ultrasound examination, and 4) recurrent episodes of major salivary gland swellings without known cause. RESULTS: Of the 154 endoscopies performed, 9 were immediate failures as a result of technical problems. Of the remaining 145 glands, 112 had obstructions and 33 had sialadenitis alone. The success rate was 82% for calculus removal. Thirty-two percent of the submandibular and 63% of the parotid sialoliths, and the 1 stone in the Bartholin's duct, were undetected before sialoendoscopy. Multiple endoscopic findings were encountered. No major complications were noted. CONCLUSIONS: Sialoendoscopy is a minimal invasive technique for the diagnosis and removal of obstructive pathologic tissue in the major salivary glands.

Adolescent↗
PubMed1999

On burn injuries related to airbag deployment.

Airbags have been shown as a vital, supplemental restraining device that save lives and reduce morbidity associated with motor vehicles crashes. However, as with any developing technology, airbags have also been identified in some instances, as the source of injuries which, have been well described in the literature. To a significantly lesser degree, burns due to airbag deployment (about 7-8% of these injuries) have been reported. These injuries will be seen more frequently as more vehicles are equipped with airbags and should be suspected in drivers and passengers involved in accidents in which airbags have been activated. This article, reviews the various types of burns and their pathogenesis, found in crashes involving airbag deployments.

Air Bags↗
PubMed1999

Central palatal burns associated with the eating of microwaved pizzas.

Burns of the oral mucosa can be caused by heat, cold, radiation, electricity and mechanical or chemical stimuli. Acids, alkalis and salts can cause considerable damage to the oral mucosa, membranes and lips. Most damage is found in the oropharynx, besides the pharynx and tonsils, the alveolar mucosa of the tongue and the masticatory mucosa of the palate or gingiva show localized or diffused damage. The clinical appearance depends on the severity of the tissue damage and the destructive properties and mode of application of the causative agent. We present an illustrative case of central palatal burn associated with the eating of microwaved pizzas and discuss similar mechanisms of injury.

Adult↗
PubMed1998

Uprighting mesially impacted mandibular permanent second molars.

Impaction of permanent teeth is a relatively common occurrence and can involve any tooth in the dental arch. Impacted mandibular second molars are relatively rare, but when they occur they may present a clinical problem for the orthodontist and oral surgeon. A typical case of bilaterally impacted mandibular second molars is illustrated, with orthodontic and surgical treatment options presented. Emphasis is placed on early diagnosis and initiation of corrective orthodontic therapy.

Child↗
PubMed1997

[Salivary gland endoscopy: a new technique for diagnosis and treatment of sialolithiasis].

The use of an endoscopic, minimally invasive technique for the removal of salivary gland stones from the submandibular or parotid duct is described. A 2.0-2.7 mm endoscope is inserted into an incision in the parotid or submandibular duct. When the stone is visualized through the endoscope it is removed using suction and forceps. We used this technique in 45 cases for removal of calculi, screening the ductal system to rule out residual calculi and determination of ductal dilatation. The success rate was 80% and there were no major postoperative complications. To the best of our knowledge these are the first such cases reported in Israel.

Endoscopy↗
PubMed1997

Sialoendoscopy: three years' experience as a diagnostic and treatment modality.

PURPOSE: This article describes the use of endoscopy for treating sialolithiasis and compares this diagnostic method with other diagnostic methods. PATIENTS AND METHODS: Forty-six major salivary glands suspected for obstructive pathology (26 males and 20 females aged 12 to 65 years) were treated using a rigid mini endoscope. The indications for sialoendoscopy were 1) screening the ductal system for any residual calculi after sialolith removal, and 3) determining the status of the major duct lumens. RESULTS: Of the 46 endoscopies attempted, 5 were immediate failures as a result of technical problems. Of the remaining 41 patients, 32 had salivary stones, and nine had sialadenitis without evidence of sialolith formation. Within the former group (22 submandibular and 10 parotid), there were four patients in whom sialolithotomy was unsuccessful (three submandibular and one parotid). Of the 22 patients with submandibular sialolithiasis, seven (32%) were undetected by imaging methods (conventional radiography, sialography, and ultrasound). In the 10 parotid ducts, seven (70%) sialoliths were undetected. In the 28 patients who underwent successful calculus removal, no major post-operative complications were noted. Interesting findings noted during endoscopy were a sphincter-like mechanism in the ductal system, evidence of ductal wall changes associated with the presence of salivary stones, peculiar connection between calculi and the ductal wall, a salivary stone forming around a hair inclusion, and the presence of polyps projecting into the duct lumen. CONCLUSIONS: Endoscopy is a minimally invasive technique for removal of calculi from the salivary glands as well as an excellent diagnostic procedure.

Adolescent↗
PubMed1996

Bringing impacted mandibular second premolars into occlusion.

Impaction of the mandibular second premolars is relatively rare and may offer general dentists and orthodontists special challenges during treatment. The authors discuss two cases involving impacted mandibular second premolars that had migrated before eruption. Surgical and orthodontic therapies were used to bring the teeth into occlusion. The authors emphasize early diagnosis and a collaborative approach between the dental professionals involved in treating these affected patients.

Adolescent↗
PubMed1995

Oro-maxillofacial skeletal deformities resulting from burn scar contractures of the face and neck.

The deforming forces of the scar contracture associated with burns of the head and neck region involve primarily the skin and secondarily the facial musculoskeletal structures. A case of severe face and neck burn accompanied by extreme facial skeletal deformity is reported. Best results are obtained in patients treated properly and promptly by a team including plastic and maxillofacial surgeons as well as orthodontists.

Adult↗
PubMed1995

Rare sites of melanoma: melanoma of the external ear.

A small series of melanomas of the external ear is presented. The presentation in general was late and they varied from 2.6 mm to 4.8 mm in thickness. The outcome in most of the patients (9 patients) was bad and within 3 years only 4 survived. The fact that 9 patients remembered having a nevus that suddenly changed to melanoma emphasizes the need for early removal of such nevi.

Aged↗
PubMed1995

Melanoma of the scalp: the invisible killer.

A series of 20 patients (15 men and 5 women) suffering from malignant melanoma of the scalp is reported. Their epidemiologic data and outcome are described. The ages ranged from 48 to 78 years (mean 63 years). Analysis of the cases demonstrated that lesions occurring posterior to the tragal line (in hair-bearing area) have the worst prognosis. The 5-year survival rate was poor; 12 patients died within this period. Two representative cases are described, and the preventable aspects of the disease are emphasized.

Aged↗
PubMed1995

Utilizing the osseointegration principle for fixation of nail prostheses.

A new osseointegrated anchorage device that holds a prosthetic nail plate was used successfully in eight patients, for a total of nine missing fingernails, secondary to trauma. There was only one early failure associated with patient noncompliance. The average follow-up time was 18 months. Details of the technique and three illustrative cases are presented.

Adolescent↗