Thesis (doctoral)--Göteborgs Universitet, 1982. / Extra t.p. with thesis statement inserted. Includes the author's published papers. Includes bibliographies.

Die Einschätzung des gingivalen Biotypes stellt für den praktizierenden Zahnarzt ein wichtiges Hilfsmittel zur Auswahl der Therapie pathogener Befunde und zur Prognose des Therapieerfolges dar. Ziel der vorliegenden Arbeit war es daher zu untersuchen, ob die Bestimmung des gingivalen Biotypes über die Transluzens einer Parodontalsonde durch die bukkale Gingiva, als eine einfach durchzuführende klinische Untersuchung, von der tatsächlichen Dicke des Weichgewebes abhängt. Darüber hinaus wurde erörtert, ob verschiedene parodontale Parameter eher mit einem dicken oder einem dünnen gingivalem Biotyp vergesellschaftet sind. Zuletzt wurden die Studienteilnehmer auf eine bestehende Relation zwischen dem Biotyp des Zahnfleisches und der Form der Frontzahnkronen des Oberkiefers hin untersucht. Zu diesem Zweck wurden an 36 Probanden der gingivale Biotyp über die Transluzens einer Parodontalsonde durch die bukkale marginale Gingiva bestimmt. Anschließend wurde die tatsächliche Dicke der Gingiva auf Höhe des gingivalen Sulkus mit einer individualisierten Messlehre ermittelt. Des weiteren wurden gingivale Parameter (Taschentiefe, Breite der keratinisierten Mukosa, Papillenhöhe) erhoben, sowie die Form der Zahnkronen der Schneidezähne im Oberkiefer anhand von Gipsmodellen bestimmt. Die erhobenen Messwerte wurden anschließend auf Unterschiede zwischen den beiden Gruppen untersucht. Um eine Abhängigkeit von der tatsächlich gemessenen Gewebedicke zu erörtern, wurden zwei Extremgruppen aus den Probanden mit den jeweils sechs höchsten, beziehungsweise niedrigsten Messwerten gebildet. Die statistische Auswertung stellt die Transluzens einer Parodontalsonde durch die bukkale marginale Gingiva als verlässliches Mittel zur Einschätzung des gingivalen Biotyps heraus, wobei anzumerken ist, dass die Sichtbarkeit der Sonde durch die Gingiva nicht ausschließlich von der Gewebedicke beeinflusst wird. Darüber hinaus konnte eine größere Kronenlänge und, äquivalent dazu, eine höhere mesiale Papille für den dicken gingivalen Biotyp dargestellt werden. Bei dem Vergleich der Extremgruppen konnte ausserdem eine signifikant höhere Taschensondierungstiefe und eine breitere befestigte Gingiva für die Gruppe mit einem sehr dicken Gewebe aufgezeigt werden. / The determination of the gingival biotype is an important aid for the dentist to choose the appropriate therapy for pathogenic findings. It represents also a relevant factor for the prognosis of a dental treatment. The aim of the present study was to investigate if the determination of the gingival biotype, by assessing the translucency of a periodontal probe through the buccal gingiva is correlated to the actual thickness of the tissue. In addition several periodontal parameters were analyzed for a relation to a thick or thin gingival biotype. Finally the study population was investigated for a relation of the gingival biotype and the shape of the clinical crown of the incisors in the upper jaw. For this purpose the gingival biotype was determined at 36 subjects by assessing the translucency of a periodontal probe through the buccal gingiva. Subsequently the true gingival thickness was measured with an individualized caliper at the level of the gingival sulcus. In addition gingival parameters (probing depth, width of the attached mucosa, height oft he papilla) were collected and the shape if the incisal crowns in the upper jaw were analyzed using plaster casts from the subjects. The collected data was evaluated for differences between the two groups. To highlight the dependence oft he true gingival thickness, two extreme groups were generated with the six highest and lowest values for the measured gingival thickness. The statistical analysis presents the translucency of a periodontal probe through the buccal gingiva as a reliable and easy way to determine the gingival biotype on a subject. However it has to be considered that the visibility oft he instrument is not solely dependent of the tissue thickness. Additionally a higher crown length and equivalent a greater papilla height was accompanied with a thick gingival biotype. Analyzing the two extreme groups a greater probing depth and a wider band of the attached gingiva could be illustrated for the group with a very thick tissue.

Indiana University-Purdue University Indianapolis (IUPUI)

O biótipo gengival, definido como a espessura da gengiva no sentido vestíbulo-lingual, desempenha importante papel na homeostasia dos tecidos periodontais, podendo ser considerado um preditor no sucesso em longo prazo das terapias periodontais e periimplantares. Assim sendo, é de suma importância reconhecer as dimensões do tecido gengival e as diferentes formas de qualificá-lo e principalmente quantificá-lo. Apesar de haver descrito na literatura inúmeros métodos para este fim, existem poucos estudos comparando a efetividade de um método em relação a outro. Desta maneira, este estudo buscou avaliar se há concordância entre avaliações clínicas e tomográficas na classificação do biótipo gengival, se existe correlação entre o biótipo gengival e a espessura óssea subjacente, além de descrever um novo método de tomada tomográfica que permita a análise quantitativa do biótipo gengival. Foram avaliados 12 indivíduos os quais realizaram tomografias computadorizadas de feixe cônico como exame imaginológico de diagnóstico ou planejamento pré-cirúrgico. Em cada paciente foram realizados quatro diferentes métodos de avaliação qualitativa da espessura gengival (transparência a sondagem, transgengival, visual através de fotografia e tomográfico), dois métodos de avaliação quantitativa (transgengival e tomográfico) da espessura gengival e avaliação da espessura óssea através da tomografia computadorizada de feixe cônico. Os resultados foram avaliados estatisticamente através do teste KAPPA, Teste t pareado e coeficiente de correlação de Pearson (pM0.05). O novo método de tomada tomográfica descrito neste estudo é eficaz para avaliação do biótipo gengival, havendo grande concordância (86,1% Kappa 0,51) e forte correlação (r=0,824) entre ele e o método transgengival (padrão ouro). A correlação entre a espessura óssea e a espessura gengival foi moderada quando utilizado o método transgengival e tomográfico (r=0,567 e r=0,653 respectivamente). / The gingival biotype, defined as the thickness of the gum in the bucco-lingual direction, plays an important role in the homeostasis of the periodontal tissues and can be considered a predictor of long-term success of periodontal and peri-implant therapies. It is therefore of paramount importance to recognize the dimensions of the gingival tissue and the different ways to qualify it and especially quantify it. Although there are numerous methods described in the literature for this purpose, there are few studies comparing the effectiveness of one method over another. Thus, this study sought to evaluate whether there is concordance between clinical assessment and CT in the classification of gingival biotype, if there is a correlation between the gingival biotype and the underlying bone thickness, and describe a new method of tomographic tapping for the quantitative analysis of biotype gingival. They evaluated 12 individuals who underwent computed tomography cone beam as imaginologic diagnostic test or pre-surgical planning. In each patient were performed four different methods of qualitative evaluation of the gingival thickness (transparency of periodontal probe, transgengival, look through photo and tomographic), two quantitative assessment methods (transgingival and tomographic) gingival thickness and assessment of bone thickness by CT Cone beam computed. The results were statistically evaluated by Kappa test, paired t test and Pearson\'s correlation coefficient (pM0.05). The new method of making tomographic described in this study is effective for evaluating gingival biotype, there is great agreement (86.1% Kappa 0.51) and strong correlation (r = 0.824) between it and the transgingival method (gold standard). The correlation between the bone thickness and moderate gingival thickness was used as the transgingival and tomographic method (r = 0.567 and r = 0.653 respectively).

Thesis (M.S.)--University of Michigan, 1975.

Thesis (M.S.)--University of Michigan, 1982.

Thesis (M.S.)--University of Michigan, 1979.

Thesis (M.S.)--University of Michigan, Ann Arbor, 1979. / Typescript (photocopy). Includes bibliographical references (leaves 53-56). Also issued in print.

Thesis (M.S.)--University of Michigan, 1970.

Thesis (M.S.)--University of Michigan, 1976.