Fogorvosi szemle, 2006 (99. évfolyam, 1-6. szám)

2006-12-01 / 6. szám

247

FOGORVOSI SZEMLE ■ 99. évf. 6. sz. 2006.

lems. Literature data show that the prevalence of supernumerary teeth in the Caucasian population ranges from 0,1 to 3,8 per cent, and that of congenital aplasia is between 3,7 and 55 per cent. In the healthy Hungarian population the prevalence of supernumerary teeth is 1,8 per cent, agenesis is 16 per cent.

Both types of anomalies can associate with various syndromes.

The lecture presents inherited diseases with related orofacial anomalies. It calls the attention to the significance and importance of early diagnosis in order to prevent severe anomalies. The authors illustrate the combined surgical, orthodontic and prosthetic treatment possibilities that help to achieve functional and aesthetic improvement in the quality of the patient’s life.

THE CLINICAL RELEVANCE OF PERIODONTAL SUPPORTIVE THERAPY IN THE CONTROL OF FURTHER PERIODONTAL ATTACHMENT LOSS

GERA, I., ROSTA, P„ KOVÁCS, V.

Department of Periodontology, Faculty of Dentistry, Semmelweis University, Budapest, Hungary

Introduction: Longitudinal follow up studies proved that strict supervised oral hygienic programs in combination with regular professional mechanical plaque control have been successful in maintaining periodontal health for a long period of time, and the further attachment loss could have been controlled even in patients with base line advanced periodontitis. The Scandinavian model showed that the supportive periodontal therapy was effective over 30 years at patients who participated in these programs, and those who have started the program 30 years ago could maintain good oral and periodontal health even at the age of 70. Objectives: Authors’ aim was to summarize the results of their supportive periodontal therapy introduced some 20 years ago at patients with destructive periodontitis, as well as to assess the efficacy of the regular mechanical professional plaque control combined with regular home care.

Subjects & methods: Eighty-seven individuals participated in the study, all of them underwent comprehensive periodontal therapy and have been at least more than five years on our maintenance program. At the end of the active therapy phase the number of teeth, plaque index (PLI) POP, PPD and CAL were registered. Patients were punt on a 3 to 12 month recall program depending on their clinical status, individual motivation and skill. The periodontal parameters and oral hygiene were annually registered.

Results: The eldest individual participated in our program was 86, while the youngest 23. The average age of the group was 45.6 years. The men/female ratio was

1:2. The longest follow-up time was 22 years. During this period of time 22 teeth were extracted but only 18 for periodontal reasons. The individual oral hygiene showed marked individual variations but 65% of patients presented such a good oral hygiene at recall appointments that only minimal supragingival plaque and calculus were detectable, and they needed only minimal professional assistance. The rest of our patients’ oral hygiene was not excellent and they always needed regular comprehensive supragingival debridement and continuous motivation. The average PPD was 2.3 mm, and the additional attachment loss compared to the baseline data was only 1 mm. Marked attachment loss and disease activity were recorded at 42 teeth of our 18 patients. The average lifespan of the fixed restorations put upon the previously treated abutments with initially fair prognosis exceeded the 10 years. During the observation period 23 patients needed new surgical therapy mainly certain type of GTR surgeries. Conclusions: In accordance with the data published in the literature our patients with advanced periodontal attachment loss at baseline but actively participating in a regular professional supportive therapy could preserve their periodontal attachment level and maintain fair periodontal health.

ZIRCONIUM OXIDE CERAMIC RESTORATIONS

GERLE, J.1, BALOGH, ZS.2, HERMANN, P.3, BORBÉLY, J.3

draining Unit, Faculty of Dentistry, Semmelweis University, Budapest, Hungary; 2Balogh Dental, Dentaltechnician Laboratory, Budapest, Hungary; department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary

New perspectives of FPD treatment are given by recent innovations of all ceramic restorations. The late progression in CAD/CAM technology can not only satisfy the increasing aesthetic demand for metal-free, tooth-colored restorations in dentistry, but it also further increases the facilities of dental treatment of patients suffering in metal allergy.

Out of those various types of ceramic materials recently used in dentistry, zirconium oxide ceramics emerge due to their sound biocompatibility, bending strength and other advantageous physical and chemical properties. Zirconium oxide artificial hip, elbow and finger prostheses, for instance, have been implanted into human bodies for nearly twenty years.

The most recent core materials used for all-ceramic FPDs are the yttrium tetragonal zirconia polycrystals (Y-TZP)-based materials. Y-TZP ceramics are manufactured and optimized industrially so that the material qualities remain unchanged through the complete pro-