Having dentures at the age of 40 for someone born in the 1930s was not that unusual, and it didn't have anything to do with whether there had been domestic violence or not. It was first from the 1970s that the benefits of better dental care during childhood and youth showed a difference in when, or if, people in their 40s had dentures or not. For those who had been born in the 1920s to 1940s dentures was for many seen as an expected part of middle age.
This study from the UK shows the difference in dental health in 1968 and 2009, the situation was probably not the same in the US, but I would think there would be similarities.
A comparison of the results of the Adult Dental Health Surveys in England and Wales in 1968 and England, Wales and Northern Ireland in 2009 shows marked improvements in many aspects of oral health. Edentulousness in adults aged 16 years and over has reduced from 37% to 6%. Dentate adults today...
www.nature.com
* Edentulousness - the state of missing teeth, ranging from partial to complete tooth loss, often resulting from severe decay, periodontal disease, or trauma.