The mass grave in Västergarn, Gotland, Sweden is located between two medieval churches and thought to be a bone depot from when one of the churches expanded their wall in more recent time. The bone depot is problematic in a way because it could contain individuals from a wide time frame, making it hard to ask certain questions regarding how the individuals lived and died. Also conducting individual studies of the skeletons is hard since the osteological material is highly fragmented and the individual graves has been disturbed post burial. Therefore this osteological study will not focus on studying the health of the people individual by individual, but rather examine the permanent teeth of this material and then apply statistics to study the overall oral health of Västergarns mass grave. Enquiries regarding tooth health and how people experienced their life because of it, are questions that I will be trying to answer in this study. A deeper and thorough investigation regarding certain teeth conditions such as dental calculus, caries, enamel hypoplasia as well as mechanical damage will be conducted. There will also be comparisons between other historic locations in Sweden such as Uppsala, Skara and the older cemetery and its ruin in Västergarn. Last but not least a discussion regarding the difficulty of examining a diverse material with different timeframes.

Uppsatsen har analyserat tandhälsan hos 20 vuxna individer med tandsten från medeltida S:t Hans, Visby, med fokus på: tandsten, karies, abscesser, parodontit, emaljhypoplasi och ante mortem tandförlust. I syfte att dra slutsatser om populationens tandhälsa och huruvida tandsten korrelerar med övrig tandhälsa. Resultatet påvisade en population med bristande tandhälsa, där 75 % av individerna hade minst ett kariesangrepp och 19 av 20 hade parodontit. Tandhälsan lär ha resulterat i tandvärk och komplikationer av allmänhälsan för S:t Hans populationen. Varken en negativ eller positiv korrelation mellan karies och tandsten kunde bevisas i materialet. Dock konstaterades att män hade en högre tandstensgrad, medan kvinnor påvisade grövre karies. Det leder till en tolkning om könsskillnader i diet i S:t Hans. Emaljhypoplasier är funna främst hos män. Det underbygger diettolkningen, samt tolkas som en indikation på könsbunden barndoms-mortalitet. Jämförelser med samtida befolkningar utfördes för att ge en vidare inblick i materialet; S:t Hans hade statistiskt fler individer med karies samt mer parodontit. Det kan innebära olika diet på fastlandet och Visby, eller indikera att tandsten leder till försämrad tand-hälsa då samtliga analyserade individer har tandsten. / The thesis focuses on the dental health of 20 adult individuals with dental calculus from medieval St. Hans, Visby. The dental health assessments were done with a focus on dental calculus, caries, dental abscesses, periodontitis, enamel hypoplasia and ante mortem tooth loss. The result of the thesis showed a lacking dental health due to a great amount of caries, 75 % of analysed individuals had at least one instance of caries, as well as periodontitis which was found in 19 out of 20 individuals. No clear negative nor positive correlation between dental calculus and caries could be seen in the material. However, men had a higher degree of dental calculus whilst women had more severe cases of caries. This leads to a possible conclusion of differing diets between the sexes. Enamel hypoplasia is found mainly in men, which supports the theory regarding diet and is posed as an indication of sex-bound childhood mortality. St. Hans popu-lation had a greater statistic of individuals with caries than contemporary Swedish populations as well as more periodontitis. This could indicate a bad dental hygiene and dental health amongst the individuals from St. Hans or it could indicate that dental calculus leads to worsened dental health since only individuals with dental calculus were analysed.