Abdel AaL Marwa, Naguib Amr, Salah Ahmed, Foda Karim, Sheta Nora, Abdel Nabi Nouran
Department of Prosthodontics, Faculty of Dentistry, Cairo University, Giza, Egypt.
Int J Dent. 2021 Sep 8;2021:1632848. doi: 10.1155/2021/1632848. eCollection 2021.
The aim of this randomized clinical trial was to compare the masticatory ability subjectively between ball and Cendres+Métaux Locator (CM-LOC) attachment for a single implant retained mandibular overdenture throughout a 24-month follow-up period.
Eighty completely edentulous patients were recruited. All patients received new complete dentures, and masticatory ability was recorded using a questionnaire (baseline record). All patients received a single implant in the midline of the completely edentulous mandible. After 3-month healing period, patients were randomized using sealed envelopes into two groups: ball or CM-LOC attachment. The same masticatory ability questionnaire was used to record masticatory ability for both groups after 2 weeks of pickup and 3-, 6-, 9-, 12-, and 24-month follow-up. Comparison between the study groups was done using Mann-Whitney test for independent samples. Two-sided values less than 0.05 were considered statistically significant.
The mean masticatory scores improved for both attachments, with no statistically significant difference between them throughout the 24-month follow-up. The CM-LOC attachment group showed a greater improvement change in masticatory ability after 6- and 12-month follow-up (-12.47 ± 12.006, -11.46 ± 14.625; =0.826), while the ball attachment group showed a slight improvement after the 24-month follow-up (-11.72 ± 12.368, -10.88 ± 11.963; =0.778).
Single implant retained mandibular overdenture improved masticatory ability subjectively with no significant difference between both attachments used although the ball attachment showed better masticatory ability scores after 24-month follow-up.
本随机临床试验的目的是在24个月的随访期内，主观比较单颗种植体支持的下颌覆盖义齿使用球帽和Cendres+Métaux定位器（CM-LOC）附着体时的咀嚼能力。
招募80例全口无牙患者。所有患者均佩戴新的全口义齿，并使用问卷记录咀嚼能力（基线记录）。所有患者在下颌全口无牙区中线植入一颗种植体。3个月愈合期后，使用密封信封将患者随机分为两组：球帽附着体组或CM-LOC附着体组。在戴入义齿2周后以及3、6、9、12和24个月随访时，使用相同的咀嚼能力问卷记录两组患者的咀嚼能力。采用独立样本的Mann-Whitney检验对研究组进行比较。双侧P值小于0.05被认为具有统计学意义。
两种附着体的平均咀嚼评分均有所提高，在24个月的随访期内两者之间无统计学显著差异。CM-LOC附着体组在6个月和12个月随访后咀嚼能力改善变化更大（-12.47±12.006，-11.46±14.625；P=0.826），而球帽附着体组在24个月随访后有轻微改善（-11.72±12.368，-10.88±11.963；P=0.778）。
单颗种植体支持的下颌覆盖义齿可主观改善咀嚼能力，尽管球帽附着体在24个月随访后咀嚼能力评分更高，但两种附着体之间无显著差异。
