OBJECTIVE: To evaluate the characteristics of severe periodontitis with various number of tooth loss during 4-year natural progression, and to analyze the factors related to higher rate of tooth loss. METHODS: A total of 217 patients aged 15 to 44 years with severe periodontitis were included, who participated in a 4-year natural progression research. Data obtained from questionnaire survey, clinical examination and radiographic measurement. Tooth loss during 4-year natural progression was evaluated. The baseline periodontal disease related and caries related factors were calculated, including number of teeth with bone loss > 50%, number of missing molars, number of teeth with widened periodontal ligament space (WPDL), number of teeth with periapical lesions and etc. Characteristics of populations with various number of tooth loss and the related factors that affected higher rate of tooth loss were analyzed. RESULTS: In 4 years of natural progression, 103 teeth were lost, and annual tooth loss per person was 0.12±0.38. Nine patients lost 3 or more teeth. Thirty-four patients lost 1 or 2 teeth, and 174 patients were absent of tooth loss. Molars were mostly frequent to lose, and canines presented a minimum loss. The number of teeth with WPDL, with periapical lesions, with intrabony defects, with probing depth (PD)≥7 mm, with PD≥5 mm, with clinical attachment loss≥5 mm, with bone loss > 50% and with bone loss > 65% were positively correlated to number of tooth loss. Results from orderly multivariate Logistic regression showd that the number of teeth with bone loss > 50% OR=1.550), baseline number of molars lost (OR=1.774), number of teeth with WPDL (1 to 2: OR=1.415; ≥3: OR=13.105), number of teeth with periapical lesions (1 to 2: OR=4.393; ≥3: OR=9.526) and number of teeth with caries/residual roots (OR=3.028) were significant risk factors related to higher likelihood of tooth loss and multiple tooth loss. CONCLUSION In 4 years of natural progression, the number of teeth with bone loss > 50%, baseline number of missing molars, number of teeth with WPDL, baseline number of teeth with periapical lesions and number of teeth with caries/residual roots were significantly related to higher risk of tooth loss and multiple tooth loss among Chinese young and middle-aged patients with severe periodontitis in rural areas.
Humans ; Tooth Loss/etiology* ; Periodontitis/complications* ; Tooth ; Periodontal Diseases ; Molar

Humans ; Orthodontics, Corrective ; adverse effects ; Peri-Implantitis ; etiology ; Periodontal Attachment Loss ; etiology ; Risk Management ; Root Resorption ; etiology ; Temporomandibular Joint Disorders ; therapy ; Tooth Root ; injuries

Periodontal disease is a potential predictor of stroke and cognitive impairment. However, this association is unclear in adults aged 50 yr and above without a history of stroke or dementia. We evaluated the association between the number of teeth lost, indicating periodontal disease, and cognitive impairment in community-dwelling adults without any history of dementia or stroke. Dental examinations were performed on 438 adults older than 50 yr (315 females, mean age 63+/-7.8 yr; 123 males, mean age 61.5+/-8.5 yr) between January 2009 and December 2010. In the unadjusted analysis, odds ratios (OR) of cognitive impairment based on MMSE score were 2.46 (95% CI, 1.38-4.39) and 2.7 (95% CI, 1.57-4.64) for subjects who had lost 6-10 teeth and those who had lost more than 10 teeth, respectively, when compared with subjects who had lost 0-5 teeth. After adjusting for age, education level, hypertension, diabetes, hyperlipidemia, and smoking, the relationship remained significant (OR, 2.0; 95% CI, 1.08-3.69, P=0.027 for those with 6-10 teeth lost; OR, 2.26; 95% CI, 1.27-4.02, P=0.006 for those with more than 10 teeth lost). The number of teeth lost is correlated with cognitive impairment among community-dwelling adults aged 50 and above without any medical history of stroke or dementia.
Aged ; Aged, 80 and over ; Cognition Disorders/*diagnosis/etiology ; Cohort Studies ; Dementia/pathology ; Female ; Humans ; Male ; Middle Aged ; Odds Ratio ; Periodontal Diseases/complications ; Residence Characteristics ; Stroke/pathology ; *Tooth Loss

OBJECTIVETo evaluate the value of valplast dentures in the temporary restoration of single missing anterior tooth.

METHODSTotally 76 patients who needed temporary restoration of single missing anterior tooth were involved and equally divided into two groups according to their own choices of procedures: group A, with valplast dentures as their temporary dentures and group B, with conventional removable partial dentures as their temporary dentures. Meanwhile,38 patients who had their single anterior teeth pulled out and did not need temporary dentures were enrolled as control group without any temporary restoration, and impressions were taken immediately before the temporary dentures were used (2 weeks after tooth extraction) and before the initiation of permanent restorations (97-100 days after tooth extraction).The heights of clinical crowns of the adjacent teeth were also recorded twice from plaster models made from the impressions.The height of labial gingiva recession was calculated as the difference between the two heights recorded.

RESULTSThe height differences of clinical crowns of the adjacent teeth was 0.5mm (range: 0.0-1.2mm) in group A, which was significantly larger than those in group B [0.0mm;(range: 0.0-0.6mm)](P<0.05) and in group C[0.0mm;(range: 0.0-0.4mm)](P<0.05).However, the difference was not significant between group B and group C (P>0.05).

CONCLUSIONApplication of valplast denture as temporary denture may cause labial gingival recession of the adjacent teeth, and therefore is not suitable for the restoration of single missing anterior tooth.

Adult ; Dental Restoration, Temporary ; instrumentation ; Dentures ; adverse effects ; Female ; Follow-Up Studies ; Gingival Recession ; etiology ; Humans ; Male ; Middle Aged ; Tooth Loss ; therapy ; Young Adult