Oral hygiene, periodontal conditions and carious lesions in patients treated with dental bridges

Abstract

A longitudinal study, extending over a period of 15 years, was carried out in a group of 102 patients who received 108 bridges made by the senior students at the Dental Faculty, University of Oslo, in 1967/68. The study included 343 abutment teeth, and the remaining teeth in the same jaw which received the restoration, 525 in all, served as control. The oral hygiene, gingival condition, pocket depth, caries on crowned teeth, location of crown margins and changes of alveolar bone level were recorded during the study. During the first 10 years, the patients received oral hygiene prophylaxis every 6 months. The mean age of the patients at the beginning of the study was 48 years. Of the original group of 102 patients, 88 attended the clinical examination after 5 years, 71 after 10 years, and 55 after 15 years. The amount of plaque did not differ between the crowned teeth and the control teeth during the observation period, while GI score 2 and 3 was more frequent in crowned teeth than in the control teeth during this period. This was mainly observed when the crown margins were located sub-gingivally. A slight increase in mean pocket depth was recorded in the crowned teeth while the mean pocket depth for the control teeth remained at the same level during the 15 years. Caries lesions were recorded in 3.3% of the abutment tooth surfaces at the 5th year, in 10.0% at the 10th year and in 12.0% at the 15th year examination. No statistical differences in bone loss could be detected between the control teeth and the crowned teeth.

The influence of some iatrogenic factors on a cytomorphometric analysis of gingival cells and periodontal status among diabetic patients

“…The inappropriate prosthodontic treatment assists the appearance of arrogance pathological changes in periodontal tissues based on the roughness, surface status of the crown margins that participate in plaque accumulation and gingival tissue inflammation 24 .On the other hand, in the experimental study on patients were followed up 5 years after part of fixed prosthesis there were increases in pocket depth more than the control group 25 and clinical attachment loss was reported in other longitudinal studies that extended from 1 to 1 5 years where the meaning of attachment loss was from 0.1 5 to 1.3 mm during this study 25,26,27 these findings similar the results of the current study where there were increases in PLI, GI, and CAL in GIII compared GI. On the other hand the GI of GII and GIII more than GI but it was more in GIII than GII furthermore, there were significance differences in CAL in our study where it was more in GIII and GII than GI but it was more in GIII than GII.…”

Limited evidence on the best position for prosthetic margins

“…However, there is evidence demonstrating the risk of harm that Sub-G prosthetic margins have on the periodontal apparatus compared to prosthetic margins at or above the gingival crevice. 5,[7][8][9][10] …”

“…But this was based on only two generally poor quality studies (141 patients) with a dropout rate of 40%. 6,7 The derived ten and 15 years pooled risk ratio estimates are based on only one small study (108 patients) with a dropout rate of 45%. Such a large dropout rate threatens the validity of the evidence generated from this review.…”

Margin width, internal line angle and labial emergence profiles of maxillary metalloceramic

“…Evidence from several studies favours the placement of supragingival margins whenever possible (3,5,6) as inflammatory response is universally associated with subgingival margins (7)(8)(9)(10). However, the fit and quality of the margins of restorations, both provisional and final, are important determinants of periodontal health.…”