Delayed dental maturity in dentitions with agenesis of mandibular second premolars

Daugaard, Solveig; Christensen, Ib Jarle; Kjær, Inger

doi:10.1111/j.1601-6343.2010.01490.x

Cited by 31 publications

(21 citation statements)

References 12 publications

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“…Unerupted stage R i is defined as completed crown formation and initiated root formation, and unerupted stage A 1/2 is defined as completed root formation and an apex that is still partially open. 21 When there was uncertainty about the maturation stage, the least mature stage was chosen.…”

Section: Methodsmentioning

confidence: 99%

“…4 Shalish et al 20 demonstrated anomalous distal inclination of the second premolar bud on the contralateral side in subjects with aplasia of the MnP2. Daugaard et al 21 showed considerable delay in tooth formation in dentitions with the same unilateral agenesis. Symons and Taverne 22 observed distal angulation of MnP2 tooth buds and delayed tooth development in individuals of the same family presenting multiple agenesis, including MnP2.…”

Section: Introductionmentioning

confidence: 99%

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Dental anomaly pattern (DAP): Agenesis of mandibular second premolar, distal angulation of its antimere and delayed tooth formation

Navarro

Cavaller

Luque

et al. 2013

The Angle Orthodontist

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Objective: To test the null hypotheses that children with unilateral agenesis of the mandibular second premolar (MnP2) do not show (1) greater distal angulation of the unerupted antimere and (2) delayed tooth formation compared with children without agenesis. Materials and Methods: Panoramic radiographs of 38 patients with unilateral aplasia of MnP2 were retrospectively examined and compared to a non-agenesic control group of 82 patients. Ages ranged from 8 to 15 years. Contralateral mandibular deciduous second molars were present for all participants. Each unerupted MnP2 was traced, and its developmental stage and angulation were recorded (measured with the distal angle and the premolar-molar angle). Dental age was evaluated using the Haavikko method. Student's t-test was performed to identify significant differences between the compared groups. The significance level for statistical testing was set at P , .05. Results: The results indicated a 9.5u decrease in the distal angle and a 13.2u increase in the premolar-molar angle for the unerupted MnP2 in the agenesis sample. This was a highly statistically significant difference (P , .001 and P , .0001, respectively) compared with the MnP2

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dental anomaly pattern (DAP): Agenesis of mandibular second premolar, distal angulation of its antimere and delayed tooth formation

Navarro

Cavaller

Luque

et al. 2013

The Angle Orthodontist

View full text Add to dashboard Cite

show abstract

“…Abnormalities such as developmental delay, 4,11,15 malposed erupting teeth, 2,3,16-18 and agenesis 5 of MnP2 occur more frequently among ethnic European populations than do other teeth. Shalish et al 2,17,18 noted that among populations of European ethnicities, significant distal inclination of the unerupted MnP2 is found not only in cases of unilateral MnP2 agenesis, but also among individuals having cleft lip/palate and palatally displaced canines.…”

Section: Discussionmentioning

confidence: 99%

Mesiodistal inclination of the unerupted second premolar in the mandible of Japanese orthodontic patients with incisor agenesis

Kure

Arai

2015

The Angle Orthodontist

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Objective: To elucidate the mesiodistal inclination of the unerupted mandibular second premolar (MnP2) in cases of mandibular incisor (MnIc) agenesis and unilateral MnP2 agenesis. Materials and Methods: Twenty-two cases of unilateral MnP2 agenesis (MnP2 agenesis group) and a control group (control group A) of 22 cases without permanent tooth agenesis excluding third molars were selected. Thirty-six cases of MnIc agenesis (MnIc agenesis group) and another control group (control group B) of 36 subjects were also selected. Mesiodistal inclination of the unerupted MnP2 on the panoramic X-rays was measured according to the distal angle and premolar-molar angle using the methods of Shalish et al. and Baccetti et al., respectively. Differences in mean values of the angular measurements between agenesis groups and corresponding controls were investigated (unpaired t-test). Results: In the MnP2 agenesis group, the mean distal angle decreased 12.3u and the mean premolar-molar angle increased 13.3u for the MnP2 compared with control group A (both P , .001). In the MnIc agenesis group, no significant differences in the means of those angles for the MnP2 were found when compared with control group B. Conclusion: In Japanese orthodontic patients, there is a relationship between unilateral MnP2 agenesis and the mesiodistal angulation of the unerupted MnP2. However, no significant relationship was observed between MnIc agenesis (which relationship is often seen in Asian populations) and the position of the unerupted MnP2. These results suggest that different genetic factors are involved in MnP2 agenesis and MnIc agenesis. (Angle Orthod. 2015;85:949-954.)

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“…It is well known that patients with agenesis in general are late in reaching dental maturity (Daugaard et al 2010). With this background in mind, we suggest that the four canines in the article presented are primary canines severely late in maturity and that agenesis of the permanent canines has occurred.…”

mentioning

confidence: 99%

Agenesis or late maturity of primary canines?

Kjær

Daugaard‐Jensen

2017

Eur Arch Paediatr Dent

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Delayed dental maturity in dentitions with agenesis of mandibular second premolars

Cited by 31 publications

References 12 publications

Dental anomaly pattern (DAP): Agenesis of mandibular second premolar, distal angulation of its antimere and delayed tooth formation

Dental anomaly pattern (DAP): Agenesis of mandibular second premolar, distal angulation of its antimere and delayed tooth formation

Mesiodistal inclination of the unerupted second premolar in the mandible of Japanese orthodontic patients with incisor agenesis

Agenesis or late maturity of primary canines?

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