UNASSIGNED: For this nonrandomized controlled trial study, 27 edentulous participants were selected and randomly divided into three groups (n = 9) based on occlusal tooth forms of the mandibular implant overdenture (MIOD). Group I: participants received an MIOD with an anatomical tooth form; Group II: participants received an MIOD with a semianatomical tooth form; and Group III: participants received an MIOD with a nonanatomical tooth form. For each participant, a single implant (screw root form) was inserted into the midline of the mandibular ridge to support the MIOD. For each group, the masticatory efficiency was evaluated after 3 months, and the OHRQoL of the participants was evaluated after 3 and 6 months. One-way ANOVA and post hoc Tukey\'s test were used for data analysis (P < 0.05).
UNASSIGNED: The masticatory efficiency of the anatomic and semianatomic tooth forms was higher than that of the nonanatomic (P < 0.05). Moreover, the improvement in the participants\' OHRQoL in the anatomic group was more significant than that of other groups (P < 0.05).
UNASSIGNED: There was a greater improvement in masticatory efficiency and participants\' OHRQoL when fitted with an anatomic tooth form mandibular overdenture retained by an immediate loading single implant than with a semianatomic or nonanatomic tooth form.
■对于这项非随机对照试验研究,选择了27名无牙参与者,并根据下颌植入物覆盖义齿(MIOD)的咬合牙齿形式将其随机分为三组(n=9)。第一组:参与者接受了具有解剖牙齿形式的MIOD;第二组:参与者接受了具有半解剖牙齿形式的MIOD;第三组:参与者接受了具有非解剖牙齿形式的MIOD。对于每个参与者,将单个植入物(螺钉根形)插入下颌脊的中线以支持MIOD。对于每个小组,3个月后评估咀嚼效率,并在3个月和6个月后评估参与者的OHRQoL。数据分析采用单因素方差分析和事后Tukey检验(P<0.05)。
■解剖型和半解剖型牙齿的咀嚼效率高于非解剖型牙齿(P<0.05)。此外,解剖组参与者OHRQoL的改善比其他组更显著(P<0.05)。
■与半解剖或非解剖牙齿形式相比,当安装解剖牙齿形式的下颌覆盖义齿时,咀嚼效率和参与者OHRQoL的改善更大。