Congenitally missing tooth is the most common dental abnormality which leaves spaces in the arch, leads to numerous forms of malocclusion due to the Bolton index discrepancy and is even associated ...with abnormal craniofacial morphology. Even though the roles of malocclusion and tooth loss in temporomandibular disorders (TMD) development remain controversial, basic researches have found some common molecules are involved in osteoarthritis and dental agenesis. However, the association of congenitally missing teeth with TMD is unknown. We hence investigated the association of congenitally missing teeth with TMD.
A cross-sectional analysis of 586 control participants (male: 287, female: 299, 38.33 ± 11.65 years) and 583 participants with non-third molar congenitally missing teeth (male: 238, female: 345, 39.13 ± 11.67 years) who consecutively received routine dental and TMD checkup according to Diagnostic Criteria for Temporomandibular Disorders Axis I in Health Management Center, Xiangya Hospital was performed. Logistic regression analysis was used to study the association of congenitally missing teeth with TMD.
The congenitally missing teeth group included 581 hypodontia and 2 oligodontia participants. The congenitally missing anterior teeth participants, the congenitally missing posterior teeth participants and participants with both congenitally missing anterior and posterior teeth accounted for 88.34%, 8.40% and 3.26% of the congenitally missing teeth group respectively. Congenitally missing teeth group had greater ratios of females and orthodontic history. Participants with congenitally missing teeth had a significantly higher prevalence of overall TMD (67.24%) in comparison to control participants (45.90%). After adjusting age, gender, presence of congenitally missing teeth, number of congenitally missing teeth, number of non-congenitally missing teeth, number of dental quadrants with missing teeth, visible third molar and orthodontic history, the variables of age, gender, presence of congenitally missing teeth and number of dental quadrants with missing teeth were significant for overall TMD. Multivariable logistic regression analysis showed congenitally missing tooth was significantly related with overall TMD odds ratio (OR):1.689(1.080-2.642), P = 0.022, intra-articular TMD OR: 1.711(1.103-2.656), P = 0.017 and pain-related TMD OR: 3.093(1.321-7.239), P = 0.009.
Congenitally missing tooth is a risk factor for TMD. When treating the congenitally missing teeth population, TMJ evaluation and multidisciplinary strategies are necessary.
•A critical weighing of the pros and cons of orthodontic space closure versus orthodontic space opening for missing teeth in the lower esthetic zone is provided.•Resin-bonded fixed partial dentures ...(RBFPDs) are nowadays considered long-term prosthodontic solutions for missing teeth.•A combination of a CAD/CAM zirconia lingual retainer with an incorporated feldspathic veneered pontic (PeraMos® retainer) is a valid option for substituting missing teeth in the esthetic zone.•For achieving excellent long-term esthetic results the edentulous area might require connective soft-tissue grafting and molding before insertion of the final prosthodontic device.
The issue of missing teeth in the lower esthetic zone can either be addressed by orthodontic space closure or opening with subsequent prosthodontic substitution. Space closure bears the risk of postreatment open gingival embrasures especially in older patients and suboptimal occlusal outcomes due to lack of intercanine and interincisal contact which may render space opening the preferred treatment. To date modern CAD/CAM technology for fabricating custommade zirconia resin-bonded devices in combination with connective soft tissue grafting offers a minimally invasive approach for achieving excellent esthetic and functional outcomes in patients for which space opening is the only treatment option.
Dental agenesis data in modern and premodern sub-Saharan Africans are presented by region, West, Central, East, and South, and by sex. Beyond characterizing the anomaly, comparisons are made with ...other populations and future work is encouraged. The findings should be of use to dental clinicians and anthropologists.
Agenesis of the UI2, LI1, UP2, LP2, UM3, and LM3 was recorded in 52 discrete samples of mainly skeletal dentitions (n = 2162) from across the subcontinent. After dividing into temporal categories, regional pooling was effected for adequate sample sizes across the vast geographic area. Only adults were included to record M3 status. Analyses included 95% confidence intervals and chi-square comparisons by region and sex.
Of 1668 modern individuals 2.3% have UI2-LP2 agenesis (CI 1.6–3.1%). Regional and sex differences are non-significant, though females are most affected. For M3s it is 7.0% (5.7–8.4%), with the Central region sample differing significantly from the East and South. Females again have greater prevalence, with the difference in the West significant. UI2-LP2 agenesis affects 0.6% of 494 premodern individuals (0.1–1.8%), while M3 agenesis is 8.5% (6.1–11.5%). None of these differences are significant.
Rates are toward the low end of global ranges, including 0.0–12.6% for UI2-LP2 from case reports, and 5.3–56.0% for M3 agenesis. With exceptions, generally insignificant inter-region differences imply that rates reasonably represent sub-Saharan peoples overall. Results will be of interest to anthropologists, but those related to risk factors, patterning, and prevalence may assist clinicians in tailoring treatment, while informing patients how this anomaly differs by population ancestry.
•New dental agenesis data in premodern and modern sub-Saharan Africans.•Of 1668 modern individuals 2.3% have UI2, LI2, UP2, LP2, and 7.0% have M3 agenesis.•Of 494 premodern individuals 0.6% have UI2, LI2, UP2, LP2 and 8.5% have M3 agenesis.•Some, but mostly insignificant differences by region and sex.•Prevalence and patterning differs from many other world populations.
Aim
To investigate the confluence of caries and periodontitis indicators from adolescence to elderhood among Americans.
Materials and Methods
This cross‐sectional study explored the grouping among a ...set of caries and periodontitis indicators (the proportion of sites with bleeding on probing, moderate probing pocket depth PPD, 4–5 mm, severe PPD ≥6 mm, moderate clinical attachment level CAL, 3–4 mm, severe CAL ≥5 mm, number of teeth with furcation involvement, number of decayed teeth, number of teeth with pulp involvement, and the number of missing teeth) in 14,421 Americans from the NHANES III study. Exploratory factorial analysis was used to determine the constructs between those indicators (factorial loading ≥0.3). These analyses were stratified by age and confirmed with a confirmatory factorial analysis. We also performed a sensitivity analysis using the NHANES 2011–2014.
Results
Two constructs were extracted. The first, Chronic Oral Diseases Burden, grouped caries indicators with moderate PPD and moderate CAL for the youngest subjects (13–39 years old), while for the subjects over 50 years, the Chronic Oral Disease Burden grouped caries indicators with severe CAL and PPD and furcation involvement. The second construct, Periodontal Destruction, grouped only periodontitis indicators.
Conclusions
Caries and periodontitis indicators grouped consistently across the different age ranges in lapse times of 25 years.
Aim
The aim of this retrospective analysis was to evaluate the survival, success and possible complications of transplanted premolars in the posterior region subdivided by developmental stage and ...patient age.
Materials and Methods
This study included patients who underwent tooth transplantation between April 2004 and December 2021. A total of 1654 premolars were transplanted into 1243 patients. Tooth mobility, oral hygiene and periodontal parameters were clinically evaluated. Intraoral radiographs were used to evaluate pulpal and periodontal healing, and root formation. The cumulative survival rate was calculated using the Kaplan–Meier method.
Results
Data were subdivided into three groups based on the stage of root development and patient age. The mean age at surgery was 14.5 years. The main indication for transplantation was agenesis, followed by trauma and other indications, such as impacted or malformed teeth. A total of 11 premolars were lost during the study period. The overall survival and success rates in the immature premolar group after an observation period of 10 years were 99.7% and 99.4%, respectively. High survival and success rates (95.7% and 95.5%, respectively) were also observed when fully developed premolars were transplanted into the posterior region of adolescents. In adults, the success rate after 10‐year follow‐up is 83.3%.
Conclusions
Transplantation of premolars with developing and fully developed roots is a predictable treatment modality.
This study aimed to assess the factors associated with tooth loss in an adult population in Guanajuato, Mexico.
This cross-sectional study included individuals enrolled in a community program ...(2014-2016). Data were gathered through closed-ended questions about sociodemographic characteristics such as sex, age, and schooling. Oral hygiene practices, self-perceived oral health, dental visits during the last 12 months, smoking habits, and diabetes status of the participants were also recorded. A clinical evaluation was performed for each person to register decayed, missing, and filled teeth (DMF-t). Descriptive statistics, bivariate analysis, and negative binomial models were used to identify variables associated with the number of missing teeth.
A total of 1640 persons were included in the study. The mean age was 41.6 (±15.4) years; 63.6% were female; and 52.7% had at least 1 missing tooth, with a mean of 2.9 (+4.6) missing teeth. The mean number of missing teeth increased by 5% per year relative to age. Females (relative ratio RR = 1.40), smokers (RR = 1.56), people with diabetes who smoke (RR = 3.62), and people who rated their oral health as fair or poor (RR = 1.2) had higher mean values of missing teeth. In contrast, individuals who achieved a high school degree (or above) (RR = 0.81), practiced daily toothbrushing (RR = 0.63), or practiced regular toothbrushing and flossing (RR = 0.65) had fewer missing teeth.
More than half of the population has at least 1 missing tooth. The number of missing teeth is higher in individuals with diabetes and unhealthy habits such as smoking. Good oral hygiene practices play an essential role in preventing tooth loss.
Aim
To determine the long‐term effects of the use of powered tooth brush (PTB) in comparison to manual tooth brush (MTB) on periodontitis severity, coronal caries experience, and the number of ...missing teeth using in a population‐based cohort study.
Materials and Methods
Using 7‐year follow‐up data of 2214 participants of the Study of Health in Pomerania (SHIP‐TREND), comprehensively adjusted linear models using generalized least squares and ordinal regression models estimated the effects of PTB usage on dental outcomes in complete case and imputed data.
Results
At follow‐up, PTB users had lower medians for mean probing depth (PD; 2.21 mm) and mean clinical attachment levels (1.73 mm) than MTB users (2.30 and 1.96 mm, respectively). Adjusted models revealed the beneficial effects of PTB usage on follow‐up levels of plaque, bleeding on probing, mean PD, percentage of sites with PDs ≥4 mm, mean clinical attachment levels (all, interdental, and non‐interdental sites, respectively), and the number of missing teeth. For the number of missing teeth, the effects were more pronounced in participants aged ≥50 years. No significant effects of PTB usage on the number of decayed or filled surfaces (all and interdental sites) were found.
Conclusions
A recommendation of PTB usage in dental practice could contribute to the long‐term promotion of oral health.
Osteogenesis imperfecta (OI) is a genetic disorder characterized by bone fragility and craniofacial and dental abnormalities such as congenitally missing teeth and teeth that failed to erupt which ...are believed to be doubled in OI patients than normal populations and were associated with low oral health quality of life. However, the etiology of these abnormalities remains unclear. To understand the factors influencing missing and unerupted teeth, we investigated their prevalence in a cohort of OI patients as a function of the clinical phenotype (OI type), the genetic variant type, the tooth type and the onset of bisphosphonate treatment.
A total of 144 OI patients were recruited from The Shriners Hospital, Montreal, Canada, between 2016 and 2017. Patients were evaluated using intraoral photographs and panoramic radiographs. Missing teeth were evaluated in all patients, and unerupted teeth were assessed only in patients ≥15 years old (n = 82).
On average, each OI patient had 2.4 missing teeth and 0.8 unerupted teeth, and the most common missing and unerupted teeth were the premolars and the upper second molars, respectively. These phenomena were more prominent in OI type III and IV than in OI type I, and were not sex or age-related. Missing teeth were significantly more common in patients with C-propeptide variants than all other variants (p-value <0.05). Unerupted teeth were significantly more common in patients with α1 and α2 glycine variants or substitutions than in those with haploinsufficiency variants. Early-onset of bisphosphonate treatment would significantly increase the risk of unerupted teeth in patients with OI types III and IV (OR = 1.68, 95% CI (1.15–1.53)).
The prevalence of missing and unerupted teeth at the tooth type level in OI patients varies according to the nature of the collagen variants and the OI type. These findings highlight the role of collagen in tooth development and eruption.
•The genetic variant is a better predictor for the dental phenotype than the OI type.•Missing premolars showed the highest prevalence in OI patients, especially those with C-propeptide variants.•Unerupted second molars were seen in high prevalence, especially in patients with C-propeptide and splice site variants.•Unerupted premolars were significantly associated with α1 glycine variants.•Early exposure to bisphosphonate treatment seems to increase the risk of developing unerupted teeth.
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