Resinifying therapy in endodontics. II--Histological and bacteriological evaluation.

This study was conducted on six rabbits, six rats and six human permanent teeth to evaluate histologically the effect of resin resorcinol in the periapical areas, the bacteriological aspect of the resin and the penetration of resin in the dentinal tubules. After 12 days period of observation plenty of lymphocytes and macrophages were evident along with granulomas which are suggestive of the tendency of the resin to stay longer. It was observed that the resin penetrate approximately three fourth distance inside the dentinal tubules. In the last phase the resin was found to be effective against the eight commonly found micro organisms. Though the histological results indicated that the periapical tissue would take longer time for complete repair, yet clinically the tooth functions well. Resinifying therapy is effective and economical method in root canal treatment.

Resinifying therapy in endodontics. A clinical and radiological evaluation.

Twenty one posterior teeth were selected at random from patients visiting outpatient Department of Punjab Govt. Dental College and Hospital, Amritsar. Out of twenty one treated teeth, seventeen had definite radiolucent area at periapex, three were non vital with no periapical radiolucent area and one tooth was vital with pulp exposure. All the teeth were treated with resinifying therapy. The treated teeth were examined after 3 months, 6 months and 9 months as regards pain on percussion, swelling and/or sinus formation. The teeth were radiographed on each follow up and the decrease/increase in radiolucency at the periapex were noted. Clinically all the treated teeth responded normal except for one which showed sinus formation after three months period of observation. This tooth was, however, retreated. Radiologically, the success rate after 9 months of observations was 84.1%. However, mean decrease in radiolucency was 2.1 mm after 3 months, 4.0 after 6 months and 5.8 after 9 months. Resinifying therapy is strongly advocated for posterior teeth with large periapical areas and also for vital teeth with pulp exposure where root canal therapy can be completed in single visit. Furthermore, the mechanism, indications and contraindication of this therapy are also discussed.

Mandibular premolars: aberrations in pulp space morphology.

One hundred and twelve mandibular first premolars and ninety six mandibular second premolars were studied to evaluate morphological aberrations in their pulp spaces. Each tooth was radiographed from two direct ions viz. buccolingual and mesiodistal and was sectioned at three sites, cementoenamel junction, middle third and apical third. 29.5%, mandibular first premolar & 13.5% mandibular second premolar exhibited second root canal with 44.60% & 46.9% curvatures respectively. Oval shape of the canal was most prevalent at cervical third area while the canal became round at middle and apical third areas. Approximately 10% mandibular first premolar exhibited C-shaped canal, while this shape was not observed in mandibular second premolar. It is concluded from this study that the knowledge of possible aberrations always help dentist realize and manage the root canal system in a better way.

Overhanging interproximal silver amalgam restorations. Prevalence and side-effects.

This study was undertaken to find out the prevalence of overhanging Cl. II silver amalgam restorations amongst patients visiting Pb. Govt. Dental College and Hospital, Amritsar and Govt. Dental College Hospital, Patiala. Two parameters viz. the pocket depth and the extent of bone loss were evaluated to study the after effects of the overhanging restorations. The findings of this investigation showed the alarming prevalence of overhanging restorations (64.12%) and clearly indicate the relationship of overhangs with periodontal diseases. Periodontal breakdown was more evident along with overhanging restorations as compared to unrestored contralateral teeth. The mean pocket depth in restored surfaces was 3.75 mm as compared to 3.46 mm in unrestored ones, showing 8.38% increase. The mean extent of bone loss in restored tooth surface was 1.64 mm as compared to 1.50 mm in unrestored ones, showing an increase of 9.33%.

Evaluation of decalcified allogenic bone matrix grafts in and around root apices. A histological study.

Decalcified Allogenic Bone grafts were implanted in and around eighteen root apices after apicoectomy. The procedure was carried out on eighteen rabbits, dividing them into three groups of six rabbits each. The animals were sacrificed after 48-72 hours, 8-10 days & 8-10 weeks period of interval. Result of the present investigation reveal that DABM grafts stimulate osteogenesis and cementogenesis after the initial phase of inflammation. Tissues simulating bone and cementum appear at the apical end, speculating that the grafts would certainly result in physiological sealing of root apices. The possibility of saving the life of non vital teeth with or without wide apical foramen will enhance in future.

Clinical and radiological examination of root surface caries. An in vitro study.

The better knowledge of prevention and treatment of periodontal diseases is expected to give rise to retention of more number of teeth in future. However, the periodontal surgery and also the intensive mechanical oral hygiene may expose the root surfaces to cariogenic environment. The present study was intended to evaluate and compare the clinical and radiological examination of root surface caries on extracted teeth. One hundred and twenty extracted teeth, both anteriors and posteriors, collected from the Department of Oral Surgery, Pb. Govt. Dental College & Hospital, Amritsar, were examined clinically as well as radiographically from all the four surfaces. Mesial surfaces were found to be more susceptible to caries and the lingual surfaces the least. Approximately eighty percent agreement was observed in clinical and radiological examination. Thorough probing is suggested especially on buccal and lingual surfaces since radiographs of these surfaces may be difficult in vivo. It was concluded from the study that early detection of root caries is of paramount importance; and the preventive technique should be considered for elderly patients even if there is not detectable root caries.