Surindar N. Bhaskar

Biodegradable ceramic implants in bone. Electron and light microscopic analysis.

Abstract The main purpose of a biodegradable ceramic implant is to fill a bone space as well as to eliminate the need for a metallic implant. Although the biodegradable ceramic does stimulate bone formation and does disappear from the implanted site, it does not have the same initial strength as a metal or nondegradable ceramic implant. When completely replaced by bone, however, it should prove superior to the latter two. Additional studies comparing degradable ceramic with various other types of ceramic material and with unfilled bone defects are in progress.

Oral surgery—oral pathology conference no. 17, Walter Reed Army Medical Center: Periapical lesions—Types, incidence, and clinical features

Abstract This report is the first in a series from the Department of Oral Pathology, United States Army Institute of Dental Research, and is based on 2,308 cases. The present report deals only with the incidence and distribution of apical lesions. It has shown that an apical radiolucency may represent any one of nine distinct clinicopathologic lesions. The radicular cyst was found to comprise 42 per cent of all apical diseases. Other lesions seen in the apical area were dental granulomas, residual cysts, apical scars, cementomas, dental abscesses, foreign-body reactions, cholesteatomas, and giant-cell lesions.

Reaction of bone to tricalcium phosphate ceramic pellets

Abstract This study indicates that tricalcium phosphate is well accepted by the tissue and may actually contribute mineral salts for the formation of bone at the site as the ceramic is broken down into granules.

Lymphoepithelial cysts of the oral cavity: Report of twenty-four cases

Abstract The clinical features, histologic findings, histogenesis, and treatment of twenty-four cases of lymphoepithelial cyst of the oral cavity, the largest series of such cases reported in the literature, have been reviewed. The findings may be summarized as follows: 1. 1. The patients ranged in age from 15 to 65 years, with an average age of 36.4 years. 2. 2. Lesions ranged in duration from 1 month to 5 years, with an average duration of 15.1 months. 3. 3. The lymphoepithelial cyst occurred more often in the male than in the female (a ratio of more than 2:1). 4. 4. All cysts were located either in the floor of the mouth or in the tongue. 5. 5. These cysts ranged in size from a few millimeters to about 1.5 by 1.5 cm. and appeared as freely mobile, circumscribed lesions. 6. 6. The lesion is characterized by a cystic cavity which is lined with stratified squamous epithelium and which lies in a circumscribed mass of follicular and diffuse lymphoid tissue. The lymphoid tissue shows lymphatic channels. 7. 7. It is postulated that this lesion arises from the epithelium which, during embryogenesis, becomes included within the lymphoid aggregations in the mucosa of the oral cavity. 8. 8. Treatment consists of local conservative excision.

Effectiveness of pulsating water jet lavage in treatment of contaminated crushed wounds.

Abstract Facial crush wounds in 200 albino rats were contaminated with soil containing K pneumoniae, Ps aeruginosa, Pr mirabilis and Staph aureus. The wounds in the control group were irrigated with water using a bulb syringe. In the experimental group the wounds were lavaged with a pulsating water jet. The results indicate that the pulsating jet lavage was much more effective in reducing the bacterial population and in the removal of necrotic tissue and foreign particles from the wounds than was irrigation with a bulb syringe. The amount and extent of the inflammatory reaction and abscess formation was found to be directly related to the amount of foreign material remaining in the wound. Early reduction of bacterial concentration in the wound by pulsating water jet lavage resulted in faster elimination of all bacteria and accelerated wound healing.

Oral surgery--oral pathology conference No. 18, Walter Reed Army Medical Center. Application of a new chemical adhesive in periodontic and oral surgery.

Abstract The present study deals with the clinical use of butyl cyanoacrylate (a chemical adhesive) as a periodontal and surgical dressing in man. The study, conducted in 105 patients in whom a total of 276 applications were made, reveals the following: 1. Butyl cyanoacrylate is a far better periodontal dressing than any in use at the present time. This conclusion is based on the fact that it is applied with great ease, is a hemostatic agent, is not bulky and therefore permits the use of prostheses, can be used around single teeth, reduces postoperative pain, usually requires only one application, does not induce overabundant granulation, and accelerates the healing process. 2. When applied on extraction sites, it produces immediate hemostasis. 3. Over large areas of mucosal ulceration produced in recurrent aphthae and leukemia, application of this adhesive produces transitory relief from pain and discomfort.

Tissue reaction to intrabony ceramic implants

Abstract It is apparent from the present study that phosphate-bonded alumina ceramic is well tolerated by tissues, does not elicit a foreign-body reaction, is rapidly infiltrated by connective tissue and bone marrow, and forms a latticework upon which osteoid and bone and dentine are deposited. Thus, it would appear that implants of alumina ceramic can be used as bone replacements.

Nonsurgical resolution of radicular cysts

Abstract This study, based upon the histologic examination of 969 radicular cysts, suggests that the vast majority of radicular cysts undergo resolution following conservative endodontic therapy. The mechanism involved in this resolution may be the dissolution of epithelial lining due to the inflammatory exudate. It is suggested that during endodontic therapy instrumentation should be carried slightly beyond the apex.

Histologic evaluation of endodontic procedures in dogs

Abstract Thirty-nine teeth of two dogs were overfilled or underfilled with silver cones or gutta-percha cones. In some teeth the furcations were perforated. In others the root canals were debrided but left unfilled and the pulp chambers were sealed only with occlusal fillings. It was shown that (1) the apical radiolucency following pulp necrosis was larger in the molar area than in the incisor area, (2) root resorption in apical lesions occurred consistently but was seen only rarely in roentgenograms, (3) root canal debridement and occlusal seal alone apparently stopped the growth of the apical lesion, (4) accidental perforations of the furcation area should be sealed off as soon as possible to reduce the incidence of periodontal destruction, and (5) underfilling of canals is usually preferable to overfilling.

Regeneration of the Salivary Glands in the Rabbit

SYNOPSIS IN INTERLINGUA REGENERATION DEL GLANDULAS SALIVARI IN LE CONILIO.—Le potentia regeneratori del glandulas submaxillar post ligation transiente del ducto esseva studiate in 71 juvene-adulte conilios de Nove Zelanda. Esseva trovate que tres dies post le ligation alterationes atrophic in le parenchyma glandular esseva ben avantiate e que 7 dies post le ligation illos esseva accompaniate de fibrosis. Le elimination del ligation resultava in un rapide regeneration del glandula.