ABSTRACT
This cross-sectional study clinically assesses the tightness of proximal contact points of fixed dental prosthesis with natural teeth. Sixty nine [69] patients visiting the Department of Prosthodontics, Armed Forces Institute of Dentists [AFID], Rawalpindi, were included. The crowns, as a single unit or terminal abutment of bridge, prepared and fabricated at the same institute were included. A total of 142 Proximal Contact Points [PCPs] were assessed with the dental floss and categorized as acceptable, loose and tight. Among these, 83 [58.4%] were acceptable, 41 [28.8%] loose and 18 [12.6%] were tight. Out of 142 PCPs, 104 [73.2%] were Porcelain Fused to Metal [PFM] and 38 [26.7%], all metal. Out of 104 PFM crown/FPD PCPs 59 [56.7%] were acceptable, 32 [30.7%] were loose and 13 [12.5%] tight. Out of 38 all metal crown/FPD PCPs 24 [63%] acceptable, 9 [23%] were loose and 5 [13%] were tight. PCPs must be checked for acceptability before cementation. The PCPs of adjacent natural dentition in same patient may serve as guide for assessment
ABSTRACT
The maxillary permanent canine acts as the corner stone of occlusion and plays a key role in smile design. Any morphological defect or eruption anomaly, affecting the maxillary permanent canine has a negative impact on the smile and facial esthetics of the person. The etiology of impacted maxillary permanent canine is multifactorial. Maxillary transverse discrepancies have been reported in 7-23% of the population. The objective of this study was to assess the association between maxillary transverse discrepancy and impacted permanent maxillary canines. The study was carried out at the Armed Forces Institute of Dentistry. After obtaining informed written consent from all patients, 60 casts of skeletal class I patients with complete permanent dentition except third molars were selected from the records of the Orthodontics department; 30 with impacted maxillary canines for the experimental group and 30 without any impacted teeth for the control group. The maxillary arch width was measured as the distance between the mesiopalatal cusp tips of the first permanent molars. The mandibular arch width was measured as the distance between the central fossae of the mandibular first permanent molars. The difference between the two measurements was calculated to determine maxillary transverse discrepancy. A positive [r = 0.341] and highly significant [p < 0.01] association was observed between maxillary transverse discrepancy and impacted maxillary permanent canines. Early correction of maxillary transverse discrepancy may reduce the chances of maxillary permanent canine impaction
ABSTRACT
To compare the mean value of nasolabial angle in dentate and edentulous subjects in young adults, middle aged dentate [having normal occlusion] and elderly edentulous subjects. Cross-sectional comparative study Place and Duration of Study: The study was conducted in the Department of Prosthodontics, Armed Forces Institute of Dentistry, and Army Medical College, Rawalpindi from September 2007 to November 2008. A total of 250 subjects were divided in three age groups. Group 1: 100 Subjects 20-30 years, Group 2: 100 subjects 35-45 years and Group 3: 50 edentulous subjects >50 years. The subjects with Intact maxillary and mandibular arches and Angle's Class-I molars, canine and incisor relationship were included. Standard lateral cephalometric radiographs of the heads were traced and nasolabial angle was measured. The mean values of nasolabial angle in dentate and edentulous were 96.79° +/- 2.6 and 111.40o +/- 2.51respectively. The mean values of nasolabial angle in young adults [20-30 years], middle aged [35-45 years] and old edentulous [>50 years] subjects were 97.39o +/- 2.94, 96.19o +/- 2.58 and 111.40o +/- 2.51respectively. The difference in mean values of nasolabial angle among three groups, was statistically significant [p<0.001]. Conclusions: Nasolabial angle in middle aged subjects is greater than younger subjects and even greater in elderly edentulous subjects. Sexual dimorphism exists as males have greater nasolabial angle in younger age. While fabricating dental prosthesis nasolabial angle may be restored near to the dentate subjects