Contents:

I Introduction 1 A Survey of Dental Practice 1 B Income from the Private Practice of Dentistry 2 C Overview of Net Income, Gross Billings, and Total Expenses 3 D Types of Dentists 4 II Private Practice Dentistry in the United States, 2004 6 III Income from the Private Practice of Dentistry 7 A Independent Dentists 7 B Solo Dentists 25 C Independent Nonsolo Dentists 44 D Employed Dentists 61 E Independent Contractors 68 IV Gross Billings, Sources of Payment, and Practice Expenses 70 A Independent Dentists 70 B Solo Dentists 91 C Independent Nonsolo Dentists 110 V Appendix One: Net Income, Gross Billings per Owner, and Practice Expenses by Specialty Area 127 VI Appendix Two: Total Net Income from Private Practice and Total Net Income from Dentistry 129 A Independent Dentists 130 B Solo Dentists 141 C Independent Nonsolo Dentists 151 D Employed Dentists 157 VII Survey Methodology 161 VIII Glossary 162 IX The 2005 Survey of Dental Practice Survey Instrument 165 II Private Practice Dentistry In The United States, 2004 Table 1: Primary and Secondary Occupations of Dentists in Private Practice, 2004 (Weighted) 6 III Income from the Private Practice of Dentistry A Independent Dentists By Type of Dentist Table 2: Net Income from the Primary Private Practice of Independent Dentists, 2004 7 Table 3: Real and Reported Net Income from the Primary Private Practice of Independent Dentists, 2000 - 2004 9 By Age Table 4: Net Income from the Primary Private Practice of Independent Dentists by Age, 2004 11 By Years Since Graduation Table 5: Net Income from the Primary Private Practice of Independent Dentists by Years Since Graduation, 2004 13 By Hours Worked Table 6: Net Income from the Primary Private Practice, Age, and Hours Worked for Independent Dentists by Hours Worked per Week, 2004 15 Table 7: Net Income from the Primary Private Practice, Age, and Hours Worked for Independent Dentists by Hours Worked per Year, 2004 16 Table 8: Distribution of Independent Dentists in Primary Private Practice by Hours Worked, 2004 17 Table 9: Distribution of Independent Dentists in Primary Private Practice by Hours Worked per Week and per Year, 2004 17 By Employment Situation Table 10: Initial and Current Employment Situation in the Primary Private Practice of Independent Dentists, 2004 (Weighted) 18 Table 11: Net Income from the Primary Private Practice, Age, and Hours Worked per Year for Independent Dentists by Employment Situation, 2004 21 By U S Census Region Table 12: Net Income from the Primary Private Practice of Independent Dentists by U S Census Region, 2004 23 B Solo Dentists By Type of Dentist Table 13: Net Income from the Primary Private Practice of Solo Dentists, 2004 25 Table 14: Real and Reported Net Income from the Primary Private Practice of Solo Dentists, 2000 - 2004 29 By Age Table 15: Net Income from the Primary Private Practice of Solo Dentists by Age, 2004 31 By Years Since Graduation Table 16: Net Income from the Primary Private Practice of Solo Dentists by Years Since Graduation, 2004 33 By Hours Worked Table 17: Net Income from the Primary Private Practice, Age, and Hours Worked for Solo Dentists by Hours Worked per Week, 2004 35 Table 18: Net Income from the Primary Private Practice, Age, and Hours Worked for Solo Dentists by Hours Worked per Year, 2004 36 Table 19: Distribution of Solo Dentists in Primary Private Practice by Hours Worked, 2004 37 Table 20: Distribution of Solo Dentists in Primary Private Practice by Hours Worked per Week and per Year, 2004 37 By Employment Situation Table 21: Initial and Current Employment Situation in the Primary Private Practice of Solo Dentists, 2004 (Weighted) 38 Table 22: Net Income from the Primary Private Practice, Age, and Hours Worked per Year for Solo Dentists by Employment Situation, 2004 41 By U S Census Region Table 23: Net Income from the Primary Private Practice of Solo Dentists by U S Census Region, 2004 42 C Independent Nonsolo Dentists By Type of Dentist Table 24: Net Income from the Primary Private Practice of Independent Nonsolo Dentists, 2004 44 Table 25: Real and Reported Net Income from the Primary Private Practice of Independent Nonsolo Dentists, 2000 - 2004 48 By Age Table 26: Net Income from the Primary Private Practice of Independent Nonsolo Dentists by Age, 2004 50 By Years Since Graduation Table 27: Net Income from the Primary Private Practice of Independent Nonsolo Dentists by Years Since Graduation, 2004 51 By Hours Worked Table 28: Net Income from the Primary Private Practice, Age, and Hours Worked for Independent Nonsolo Dentists by Hours Worked per Week, 2004 52 Table 29: Net Income from the Primary Private Practice, Age, and Hours Worked for Independent Nonsolo Dentists by Hours Worked per Year, 2004 53 Table 30: Distribution of Independent Nonsolo Dentists in Primary Private Practice by Hours Worked, 2004 54 Table 31: Distribution of Independent Nonsolo Dentists in Primary Private Practice by Hours Worked per Week and per Year, 2004 54 By Employment Situation Table 32: Initial and Current Employment Situation in the Primary Private Practice of Independent Nonsolo Dentists, 2004 (Weighted) 55 Table 33: Net Income from the Primary Private Practice, Age, and Hours Worked per Year for Independent Nonsolo Dentists by Employment Situation, 2004 57 By U S Census Region Table 34: Net Income from the Primary Private Practice of Independent Nonsolo Dentists by U S Census Region, 2004 (Weighted) 59 D Employed Dentists By Type of Dentist Table 35: Net Income from the Primary Private Practice of Employed Dentists, 2004 61 Table 36: Real and Reported Net Income from the Primary Private Practice of Employed Dentists, 2000 - 2004 62 By Age Table 37: Net Income from the Primary Private Practice of Employed Dentists by Age, 2004 63 By Years Since Graduation Table 38: Net Income from the Primary Private Practice of Employed Dentists by Years Since Graduation, 2004 63 By Hours Worked Table 39: Net Income from the Primary Private Practice, Age, and Hours Worked for Employed Dentists by Hours Worked per Week, 2004 64 Table 40: Net Income from the Primary Private Practice, Age, and Hours Worked for Employed Dentists by Hours Worked per Year, 2004 65 Table 41: Distribution of Employed Dentists in Primary Private Practice by Hours Worked, 2004 65 Table 42: Distribution of Employed Dentists in Primary Private Practice by Hours Worked per Week and per Year, 2004 66 By Employment Situation Table 43: Net Income from the Primary Private Practice, Age, and Hours Worked per Year for Employed Dentists by Employment Situation, 2004 67 E Independent Contractors Table 44: Net Income from the Primary Private Practice of Independent Contractors, 2004 68 Table 45: Distribution of Independent Contractors in Primary Private Practice by Hours Worked, 2004 69 IV Gross Billings, Sources of Payment, and Practice Expenses A Independent Dentists Gross Billings By Type of Dentist Table 46: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Independent Dentists, 2004 70 Table 47: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Unincorporated Independent Dentists, 2004 72 Table 48: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Incorporated Independent Dentists, 2004 73 Table 49: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Independent Dentists in Practices with No Nonowner Dentists, 2004 74 Table 50: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Independent Dentists in Practices with Nonowner Dentists, 2004 74 Table 51: Real and Reported Gross Billings per Owner from the Primary Private Practice of Independent Dentists, 2000 - 2004 75 Gross Billings By Age Table 52: Gross Billings per Owner from the Primary Private Practice of Independent Dentists by Age, 2004 77 Gross Billings By Years Since Graduation Table 53: Gross Billings per Owner from the Primary Private Practice of Independent Dentists by Years Since Graduation, 2004 78 Gross Billings By Hours Worked Table 54: Gross Billings per Owner from the Primary Private Practice, Age, and Hours Worked for Independent Dentists by Hours Worked per Week, 2004 79 Table 55: Gross Billings per Owner from the Primary Private Practice, Age, and Hours Worked for Independent Dentists by Hours Worked per Year, 2004 80 Gross Billings By Employment Situation Table 56: Gross Billings per Owner from the Primary Private Practice, Age, and Hours Worked per Year for Independent Dentists by Employment Situation, 2004 81 Gross Billings By U S Census Region Table 57: Gross Billings per Owner from the Primary Private Practice of Independent Dentists by U S Census Region, 2004 83 Sources of Gross Billings Table 58: Sources of Gross Billings Received from the Primary Private Practice of Independent Dentists, 2004 85 Sources of Gross Billings by U S Census Region Table 59: Sources of Gross Billings Received from the Primary Private Practice of Independent Dentists by U S Census Region, 2004 86 Practice Expenses Table 60: Practice Expenses per Owner from the Primary Private Practice of Independent Dentists, 2004 88 Table 61: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Independent Dentists, 2004 89 Practice Expenses by Employment Situation Table 62: Practice Expenses per Owner from the Primary Private Practice of Independent Dentists by Employment Situation, 2004 90 Table 63: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Independent Dentists by Employment Situation, 2004 90 B Solo Dentists Gross Billings By Type of Dentist Table 64: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Solo Dentists, 2004 91 Table 65: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Unincorporated Solo Dentists, 2004 93 Table 66: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Incorporated Solo Dentists, 2004 94 Table 67: Real and Reported Gross Billings from the Primary Private Practice of Solo Dentists, 2000 - 2004 95 Gross Billings By Age Table 68: Gross Billings from the Primary Private Practice of Solo Dentists by Age, 2004 97 Gross Billings By Years Since Graduation Table 69: Gross Billings from the Primary Private Practice of Solo Dentists by Years Since Graduation, 2004 98 Gross Billings By Hours Worked Table 70: Gross Billings from the Primary Private Practice, Age, and Hours Worked for Solo Dentists by Hours Worked per Week, 2004 99 Table 71: Gross Billings from the Primary Private Practice, Age, and Hours Worked for Solo Dentists by Hours Worked per Year, 2004 100 Gross Billings By Employment Situation Table 72: Gross Billings from the Primary Private Practice, Age, and Hours Worked per Year for Solo Dentists by Employment Situation, 2004 101 Gross Billings By U S Census Region Table 73: Gross Billings from the Primary Private Practice of Solo Dentists by U S Census Region, 2004 102 Sources of Gross Billings Table 74: Sources of Gross Billings Received from the Primary Private Practice of Solo Dentists, 2004 104 Sources of Gross Billings by U S Census Region Table 75: Sources of Gross Billings Received from the Primary Private Practice of Solo Dentists by U S Census Region, 2004 105 Practice Expenses Table 76: Practice Expenses from the Primary Private Practice of Solo Dentists, 2004 107 Table 77: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Solo Dentists, 2004 108 Practice Expenses by Employment Situation Table 78: Practice Expenses from the Primary Private Practice of Solo Dentists by Employment Situation, 2004 109 Page Table 79: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Solo Dentists by Employment Situation, 2004 109 C Independent Nonsolo Dentists Gross Billings By Type of Dentist Table 80: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Independent Nonsolo Dentists, 2004 110 Table 81: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Unincorporated Independent Nonsolo Dentists, 2004 112 Table 82: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Incorporated Independent Nonsolo Dentists, 2004 113 Table 83: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Independent Nonsolo Dentists in Practices with No Nonowner Dentists, 2004 114 Table 84: Gross Billings and Percentage of Gross Billings Collected from the Primary Private Practice of Independent Nonsolo Dentists in Practices with Nonowner Dentists, 2004 114 Gross Billings By Age Table 85: Gross Billings per Owner from the Primary Private Practice of Independent Nonsolo Dentists by Age, 2004 115 Gross Billings By Years Since Graduation Table 86: Gross Billings per Owner from the Primary Private Practice of Independent Nonsolo Dentists by Years Since Graduation, 2004 116 Gross Billings By Hours Worked Table 87: Gross Billings per Owner from the Primary Private Practice, Age, and Hours Worked for Independent Nonsolo Dentists by Hours Worked per Week, 2004 117 Table 88: Gross Billings per Owner from the Primary Private Practice, Age, and Hours Worked for Independent Nonsolo Dentists by Hours Worked per Year, 2004 118 Gross Billings By Employment Situation Table 89: Gross Billings per Owner from the Primary Private Practice, Age, and Hours Worked per Year for Independent Nonsolo Dentists by Employment Situation, 2004 119 Gross Billings By U S Census Region Table 90: Gross Billings per Owner from the Primary Private Practice of Independent Nonsolo Dentists by U S Census Region, 2004 121 Sources of Gross Billings Table 91: Sources of Gross Billings Received from the Primary Private Practice of Independent Nonsolo Dentists, 2004 122 Practice Expenses Table 92: Sources of Gross Billings Received from the Primary Private Practice of Independent Nonsolo Dentists by U S Census Region, 2004 123 Table 93: Practice Expenses per Owner from the Primary Private Practice of Independent Nonsolo Dentists, 2004 125 Table 94: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Independent Nonsolo Dentists, 2004 125 Practice Expenses by Employment Situation Table 95: Practice Expenses per Owner from the Primary Private Practice of Independent Nonsolo Dentists by Employment Situation, 2004 126 Table 96: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Independent Nonsolo Dentists by Employment Situation, 2004 126 V Appendix One: Net Income, Gross Billings per Owner, and Practice Expenses by Specialty Area Table 97: Net Income from the Primary Private Practice of Independent Dentists by Specialty, 2004 127 Table 98: Gross Billings per Owner from the Primary Private Practice of Independent Dentists by Specialty, 2004 127 Table 99: Practice Expenses from the Primary Private Practice of Independent Dentists by Specialty, 2004 128 Table 100: Practice Expenses as a Percentage of Gross Billings from the Primary Private Practice of Independent Dentists by Specialty, 2004 128 VI Appendix Two: Total Net Income from Private Practice and Total Net Income from Dentistry Table 101: Secondary Occupation of Primary Private Practitioners, 2004 129 A Independent Dentists By Type of Dentist Table 102: Total Net Income from Private Practice of Independent Dentists, 2004 130 Table 103: Total Net Income from Dentistry of Independent Dentists, 2004 130 By Age Table 104: Total Net Income from Private Practice of Independent Dentists by Age, 2004 131 Table 105: Total Net Income from Dentistry of Independent Dentists by Age, 2004 132 By Years Since Graduation Table 106: Total Net Income from Private Practice of Independent Dentists by Years Since Graduation, 2004 133 Table 107: Total Net Income from Dentistry of Independent Dentists by Years Since Graduation, 2004 134 By Hours Worked Table 108: Total Net Income from Private Practice of Independent Dentists by Hours per Week and per Year, 2004 135 Table 109: Total Net Income from Dentistry of Independent Dentists by Hours per Week and per Year, 2004 136 By Employment Situation Table 110: Total Net Income from Private Practice of Independent Dentists by Employment Situation, 2004 137 Table 111: Total Net Income from Dentistry of Independent Dentists by Employment Situation, 2004 138 By U S Census Region Table 112: Total Net Income from Private Practice of Independent Dentists by U S Census Region, 2004 139 Table 113: Total Net Income from Dentistry of Independent Dentists by U S Census Region, 2004 140 B Solo Dentists By Type of Dentist Table 114: Total Net Income from Private Practice of Solo Dentists, 2004 141 Table 115: Total Net Income from Dentistry of Solo Dentists, 2004 141 By Age Table 116: Total Net Income from Private Practice of Solo Dentists by Age, 2004 142 Table 117: Total Net Income from Dentistry of Solo Dentists by Age, 2004 143 By Years Since Graduation Table 118: Total Net Income from Private Practice of Solo Dentists by Years Since Graduation, 2004 144 Table 119: Total Net Income from Dentistry of Solo Dentists by Years Since Graduation, 2004 145 By Hours Worked Table 120: Total Net Income from Private Practice of Solo Dentists by Hours per Week and per Year, 2004 146 Table 121: Total Net Income from Dentistry of Solo Dentists by Hours per Week and per Year, 2004 147 By Employment Situation Table 122: Total Net Income from Private Practice of Solo Dentists by Employment Situation, 2004 148 Table 123: Total Net Income from Dentistry of Solo Dentists by Employment Situation, 2004 148 By U S Census Region Table 124: Total Net Income from Private Practice of Solo Dentists by U S Census Region, 2004 149 Table 125: Total Net Income from Dentistry of Solo Dentists by U S Census Region, 2004 150 C Independent Nonsolo Dentists By Type of Dentist Table 126: Total Net Income from Private Practice of Independent Nonsolo Dentists, 2004 151 Table 127: Total Net Income from Dentistry of Independent Nonsolo Dentists, 2004 151 By Age Table 128: Total Net Income from Private Practice of Independent Nonsolo Dentists by Age, 2004 152 Table 129: Total Net Income from Dentistry of Independent Nonsolo Dentists by Age, 2004 152 By Years Since Graduation Table 130: Total Net Income from Private Practice of Independent Nonsolo Dentists by Years Since Graduation, 2004 153 Table 131: Total Net Income from Dentistry of Independent Nonsolo Dentists by Years Since Graduation, 2004 153 By Hours Worked Table 132: Total Net Income from Private Practice of Independent Nonsolo Dentists by Hours per Week and per Year, 2004 154 Table 133: Total Net Income from Dentistry of Independent Nonsolo Dentists by Hours per Week and per Year, 2004 154 By Employment Situation Table 134: Total Net Income from Private Practice of Independent Nonsolo Dentists by Employment Situation, 2004 155 Table 135: Total Net Income from Dentistry of Independent Nonsolo Dentists by Employment Situation, 2004 155 By U S Census Region Table 136: Total Net Income from Private Practice of Independent Nonsolo Dentists by U S Census Region, 2004 156 Table 137: Total Net Income from Dentistry of Independent Nonsolo Dentists by U S Census Region, 2004 156 D Employed Dentists By Type of Dentist Table 138: Total Net Income from Private Practice of Employed Dentists, 2004 157 Table 139: Total Net Income from Dentistry of Employed Dentists, 2004 157 By Age Table 140: Total Net Income from Private Practice of Employed Dentists by Age, 2004 157 Table 141: Total Net Income from Dentistry of Employed Dentists by Age, 2004 157 By Years Since Graduation Table 142: Total Net Income from Private Practice of Employed Dentists by Years Since Graduation, 2004 158 Table 143: Total Net Income from Dentistry of Employed Dentists by Years Since Graduation, 2004 158 By Hours Worked Table 144: Total Net Income from Private Practice of Employed Dentists by Hours per Week and per Year, 2004 159 Table 145: Total Net Income from Dentistry of Employed Dentists by Hours per Week and per Year, 2004 159 By Employment Situation Table 146: Total Net Income from Private Practice of Employed Dentists by Employment Situation, 2004 160 Table 147: Total Net Income from Dentistry of Employed Dentists by Employment Situation, 2004 160 LIST OF FIGURES I Introduction D Types of Dentists Figure 1: Distribution of Responding Dentists Whose Primary Occupation Was Private Practice, 2004 5 II Private Practice Dentistry in the United States, 2004 Figure 2: Employment Situation of All Dentists in Private Practice, 2004 (Weighted) 6 III Income from the Private Practice of Dentistry A Independent Dentists By Type of Dentist Figure 3: Net Income from the Primary Private Practice of Independent Dentists, 2000 - 2004 8 Figure 4: Confidence Intervals for Reported Mean Net Income of Independent Dentists, 2000 - 2004 10 By Age Figure 5: Net Income from the Primary Private Practice of Independent Dentists by Age, 2004 12 Figure 6: Distribution of Independent General Practitioners and Specialists by Age, 2004 12 By Years Since Graduation Figure 7: Net Income from the Primary Private Practice of Independent Dentists by Years Since Graduation, 2004 14 By Employment Situation Figure 8: Current Employment Situation in the Primary Private Practice of Independent Dentists by Type of Dentist, 2004 19 Figure 9: Current Employment Situation in the Primary Private Practice of Independent Dentists, 2000 – 2004 (Weighted) 20 By U S Census Region Figure 10: Net Income from the Primary Private Practice of Independent Dentists by U S Census Region, 2004 (Weighted) 24 B Solo Dentists By Type of Dentist Figure 11: Net Income from the Primary Private Practice of Solo Dentists, 2000 - 2004 26 Figure 12: Net Income from the Primary Private Practice of Unincorporated Solo Dentists, 2000 - 2004 27 Figure 13: Net Income from the Primary Private Practice of Incorporated Solo Dentists, 2000 - 2004 28 Figure 14: Confidence Intervals for Reported Mean Net Income of Solo Dentists, 2000 - 2004 30 By Age Figure 15: Net Income from the Primary Private Practice of Solo Dentists by Age, 2004 32 Figure 16: Distribution of Solo General Practitioners and Specialists by Age, 2004 32 By Years Since Graduation Figure 17: Net Income from the Primary Private Practice of Solo Dentists by Years Since Graduation, 2004 34 By Employment Situation Figure 18: Current Employment Situation in the Primary Private Practice of Solo Dentists by Type of Dentist, 2004 39 Figure 19: Current Employment Situation in the Primary Private Practice of Solo Dentists, 2000 – 2004 (Weighted) 40 By U S Census Region Figure 20: Net Income from the Primary Private Practice of Solo Dentists by U S Census Region, 2004 (Weighted) 43 C Independent Nonsolo Dentists By Type of Dentist Figure 21: Net Income from the Primary Private Practice of Independent Nonsolo Dentists, 2000 - 2004 45 Figure 22: Net Income from the Primary Private Practice of Unincorporated Independent Nonsolo Dentists, 2000 - 2004 46 Figure 23: Net Income from the Primary Private Practice of Incorporated Independent Nonsolo Dentists, 2000 - 2004 47 Figure 24: Confidence Intervals for Reported Mean Net Income of Independent Nonsolo Dentists, 2000 - 2004 49 By Age Figure 25: Distribution of Independent Nonsolo General Practitioners and Specialists by Age, 2004 50 By Employment Situation Figure 26: Current Employment Situation in the Primary Private Practice of Independent Nonsolo Dentists by Type of Dentist, 2004 56 By U S Census Region Figure 27: Net Income from the Primary Private Practice of All Independent Nonsolo Dentists by U S Census Region, 2004 (Weighted) 60 D Employed Dentists By Type of Dentist Figure 28: Net Income from the Primary Private Practice of Employed Dentists, 2000 - 2004 61 Figure 29: Confidence Intervals for Reported Mean Net Income of Employed General Practitioners, 2000 - 2004 62 By Age Figure 30: Distribution of Employed Dentists by Age, 2004 (Weighted) 63 By Employment Situation Figure 31: Current Employment Situation in the Primary Private Practice of Employed Dentists, 2004 (Weighted) 67 E Independent Contractors Figure 32: Distribution of Independent Contractors by Age, 2004 (Weighted) 68 Figure 33: Current Employment Situation in the Primary Private Practice of Independent Contractors, 2004 (Weighted) 69 IV Gross Billings, Sources of Payment, and Practice Expenses A Independent Dentists Gross Billings By Type of Dentist Figure 34: Gross Billings per Owner from the Primary Private Practice of Independent Dentists, 2000 - 2004 71 Figure 35: Confidence Intervals for Reported Mean Gross Billings per Owner of Independent Dentists, 2000 - 2004 76 Gross Billings by U S Census Region Figure 36: Gross Billings per Owner from the Primary Private Practice of Independent Dentists by U S Census Region, 2004 (Weighted) 84 Sources of Gross Billings Figure 37: Sources of Gross Billings Received from the Primary Private Practice of Independent Dentists, 2000 – 2004 (Weighted) 85 Practice Expenses Figure 38: Practice Expenses per Owner from the Primary Private Practice of Independent Dentists, 2000 – 2004 88 B Solo Dentists Gross Billings By Type of Dentist Figure 39: Gross Billings from the Primary Private Practice of Solo Dentists, 2000 - 2004 92 Figure 40: Confidence Intervals for Reported Mean Gross Billings of Solo Dentists, 2000 - 2004 96 Gross Billings by U S Census Region Figure 41: Gross Billings from the Primary Private Practice of Solo Dentists by U S Census Region, 2004 (Weighted) 103 Sources of Gross Billings Figure 42: Sources of Gross Billings Received from the Primary Private Practice of Solo Dentists, 2000 – 2004 (Weighted) 104 Practice Expenses Figure 43: Practice Expenses from the Primary Private Practice of Solo Dentists, 2000 – 2004 107 C Independent Nonsolo Dentists Gross Billings By Type of Dentist Figure 44: Gross Billings per Owner from the Primary Private Practice of Independent Nonsolo Dentists, 2001 - 2004 111 Figure 45: Sources of Gross Billings Received from the Primary Private Practice of Independent Nonsolo Dentists, 2000 – 2004 (Weighted) 122