PubMed Health⌕ Search

Biomedical subjects

M D Novelli

Publications and source records attributed to M D Novelli.

11 recordsLinked to original sources
PubMed1998

Thickness of the remaining enamel after the preparation of cingulum rest seats on maxillary canines.

PURPOSE: This study evaluated the level of tissue removal that takes place on enamel and dentin during cingulum rest seat preparation. MATERIAL AND METHODS: A quantitative evaluation of the thickness of the remaining enamel of cingulum seat preparations to receive removable partial denture rests was carried out in 20 maxillary canines with a light optical microscope. RESULTS: Thirty percent of the preparations were overextended into dentinal tissue, and 85% had depths that were insufficient to receive rests.

Cuspid↗
PubMed1997

Effects of unilateral upper incisor extraction on facial growth of young rats.

The effects of unilateral extraction of the upper incisor (one tooth) on facial growth of young rats were studied. The remaining upper incisor showed deviation towards the opposite side, and there was regular dental wear of all the incisors. The effects were evident only in the mid-facial area. Cephalometric measurements showed significant shortening with deviation of the incisor bone on the extraction side. There was no significant disturbance of the growth of the rest of the maxilla and mandible. These results indicate that upper incisor extractions have a localized influence, leading to impairment of incisor bone growth.

Alveolar Process↗
PubMedDate not supplied

[Computer-assisted image processing for quantifying histopathologic variables in the healing of colonic anastomosis in dogs].

BACKGROUND: The authors present the experimental results of the computerized quantifying of tissular structures involved in the reparative process of colonic anastomosis performed by manual suture and biofragmentable ring. The quantified variables in this study were: oedema fluid, myofiber tissue, blood vessel and cellular nuclei. MATERIAL AND METHODS: An image processing software developed at Laboratório de Informática Dedicado à Odontologia (LIDO) was utilized to quantifying the pathognomonic alterations in the inflammatory process in colonic anastomosis performed in 14 dogs. The results were compared to those obtained through traditional way diagnosis by two pathologists in view of counterproof measures. The criteria for these diagnoses were defined in levels represented by absent, light, moderate and intensive which were compared to analysis performed by the computer. RESULTS: There was significant statistical difference between two techniques: the biofragmentable ring technique exhibited low oedema fluid, organized myofiber tissue and higher number of alongated cellular nuclei in relation to manual suture technique. CONCLUSION: The analysis of histometric variables through computational image processing was considered efficient and powerful to quantify the main tissular inflammatory and reparative changing.

Anastomosis, Surgical↗
PubMedDate not supplied

[Comparative study of intestinal anastomosis with manual suture and biofragmentable ring in dogs under corticosteroid administration].

BACKGROUND: This study analyzed intestinal anastomoses by manual suture and by compression with biofragmentable ring under delay of cicatrization administering parenteral corticoids. MATERIAL AND METHODS: Twenty dogs were divided into two groups: control and test, the latter submitted to intramuscular administration of hydrocortisone hemisuccinate, 25 to 33 mg/kg/day, on the 30th preoperative and 7th postoperative days. During surgery, each animal underwent two colon sections with anastomosis by manual suture in a single extramucous plane and compression with biofragmentable ring. The animals were sacrificed 7 days after the procedure to evaluate the anastomoses. RESULTS: In the postoperative period, one death occurred in the test group and two in the control group, caused by nonblocked fistula in the anastomoses by ring compression. Statistically, there was a similar incidence of adherences, fistulas, afferent dilatation and obstruction using comparison methods. On microscopy, deficiency in mucous regeneration of the anastomoses by compression was observed. Computerized histological analysis evidenced in the anastomoses by compression, a greater inflammatory reaction, greater edema of the submucous membrane and enlarged scars. CONCLUSIONS: It was concluded that, with the biofragmentable ring, in colonic anastomosis under delay of cicatrization induced by corticoids, similar results to manual suture regarding to postoperative complications incidence were obtained; ring, however, determined worse mucous regeneration and greater cicatricial inflammatory reaction.

Anastomosis, Surgical↗
PubMedDate not supplied

[Student evaluation of some aspects of the general pathology course at the University of São Paulo Dental School].

An inquiry based on questionnaires about some aspects of the general pathology course offered to the students of the FOUSP during the last three years was realized. It has been demonstrated that the most important chapters were inflammation and repair, due to its usefulness on the other courses of the curriculum. The macroscopy and microscopy lessons doesn't seem to contribute with relevance on the apprenticeship of the subject matter, in accordance to the students' opinion. So, it seems that, a good classical lecture for these scholars, is still the better way to teach.

Brazil↗
PubMedDate not supplied

[Comparative experimental study of colocolic anastomosis with manual suture and biofragmentable ring].

BACKGROUND: The authors undertook an experimental trial, in order to compare one layer interrupted sutured large bowel anastomosis with that of biofragmentable anastomotic ring (BAR). This device creates an inverted serosa-to-serosa anastomosis. It is designed to fragment after hydrolysis and it is passed within the faeces after healing of the anastomosis. Fourteen dogs were operated on, having been performed 28 anastomoses, 14 with conventional way and 14 with the BAR, both in the same bowel, on alternate sequence and 10cm from each other. MATERIAL AND METHODS: Performing time, technical difficulties, postoperative complications and the healing anastomotic quality were studied. Histological examination was done not only by traditional technique but also by using computerized program, in order to measure the amount of inflammatory infiltration at the anastomosis site. RESULTS: All dogs tolerated the operation well and postoperative period was uneventful. At laparotomy, after an average time of 33 days, perianastomotic adherence was mostly noted in the sutured anastomosis. Anastomotic index had no significant difference in both methods, but inflammatory change was mostly detected in sutured anastomosis, on which the amount of edema infiltration was significantly higher. CONCLUSIONS: Based on these results, the authors conclude that the BAR anastomosis appears to be a safe alternative, uniform, more rapid and easy technique, with better healing. No difference in the clinical results was noted.

Anastomosis, Surgical↗