OBJECTIVETo evaluate masticatory performance and life quality of children with ectodermal dysplasia (ED) after prosthetic rehabilitation.

METHODSSix children with ED received denture restoration and 18 healthy children were involved in this study. The surface electromyography (EMG) of masseter (MM) and anterior temporalis (TA) during clenching and chewing movement were recorded. The EMG amplitude, area, asymmetry index of total and activity index of MM/TA were compared at each stage. The masticatory efficiency was measured with spectrophotometer. The life quality was assessed using visual analogue scale questionnaire.

RESULTSThe EMG amplitude of MM and TA during chewing in ED Group were 41.7% and 45.6% of the control group respectively, the area were 35.9% and 36.0% respectively. Significant difference in asymmetry index of total during clenching was observed between the two groups (P < 0.05) but not during chewing (P > 0.05). The differences of activity index of MM/TA during clenching and chewing between the two groups were not detected (P > 0.05). The masticatory efficiency of ED group was 67.2% of the control group. The score of chewing function in children with ED after prosthetic rehabilitation was three times higher than before, and no difference was present between the two groups (P > 0.05).

CONCLUSIONSEarly prosthetic rehabilitation can significantly improve the masticatory performance and life quality of children with ED.

Case-Control Studies ; Child ; Dental Prosthesis ; Ectodermal Dysplasia ; physiopathology ; rehabilitation ; Electromyography ; Humans ; Masseter Muscle ; physiology ; Mastication ; physiology ; Quality of Life ; Temporal Muscle ; physiology

OBJECTIVETo evaluate the preliminary clinical effect of mineral trioxide aggragate (MTA) pulpotomy on immature permanent teeth with irreversible pulpitis.

METHODSTwenty-six immature permanent teeth with irreversible pulpitis were recuited from Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology. These teeth were treated with partial or full pulpotomy according to the condition of pulp bleeding. MTA was used as pulp capping material. Patients were recalled periodically after the treatment. Clinical and radiographic effects were evaluated.

RESULTSAt one year follow-up, 20 teeth were evaluated as healed or healing, 2 teeth were evaluated as failure and 4 teeth were dropped out. The success rate was considered 91% (20/22). A dentinal bridge was radiographcally observed underneath the pulpotomy site in 13 teeth(65%, 13/20).

CONCLUSIONSMTA pulpotomy is an effective method for the treatment of immature permanent teeth with irreversible pulpitis. But further research with longer follow up period is required.

Aluminum Compounds ; therapeutic use ; Beijing ; Calcium Compounds ; therapeutic use ; Child ; Dental Pulp Capping ; methods ; Dentition, Permanent ; Follow-Up Studies ; Humans ; Minerals ; Molar ; Oxides ; therapeutic use ; Pulpitis ; surgery ; Pulpotomy ; methods ; Silicates ; therapeutic use